<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2023 Workiva-->
<!--r:711707c5-af0a-40dc-9382-10804c1550a5,g:e3f066d0-d6e4-4f36-8df5-e73b946b20c5-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:sui="http://www.suncommunities.com/20221231" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2020-01-21" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.suncommunities.com/20221231">
  <xs:import namespace="http://fasb.org/srt/2022" schemaLocation="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd"/>
  <xs:import namespace="http://fasb.org/us-gaap-sup/2022q3" schemaLocation="https://xbrl.fasb.org/us-gaap/2022q3/us-gaap-sup-2022q3.xsd"/>
  <xs:import namespace="http://fasb.org/us-gaap/2022" schemaLocation="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd"/>
  <xs:import namespace="http://www.w3.org/1999/xlink" schemaLocation="http://www.xbrl.org/2003/xlink-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2020-01-21" schemaLocation="https://www.xbrl.org/dtr/type/2020-01-21/types.xsd"/>
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/country/2022" schemaLocation="https://xbrl.sec.gov/country/2022/country-2022.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2022" schemaLocation="https://xbrl.sec.gov/dei/2022/dei-2022.xsd"/>
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="sui-20221231_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="sui-20221231_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="sui-20221231_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="sui-20221231_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="CoverPage" roleURI="http://www.suncommunities.com/role/CoverPage">
        <link:definition>0000001 - Document - Cover Page</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AuditInformation" roleURI="http://www.suncommunities.com/role/AuditInformation">
        <link:definition>0000002 - Document - Audit Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedBalanceSheets" roleURI="http://www.suncommunities.com/role/ConsolidatedBalanceSheets">
        <link:definition>0000003 - Statement - Consolidated Balance Sheets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedBalanceSheetsParenthetical" roleURI="http://www.suncommunities.com/role/ConsolidatedBalanceSheetsParenthetical">
        <link:definition>0000004 - Statement - Consolidated Balance Sheets (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsOfOperations" roleURI="http://www.suncommunities.com/role/ConsolidatedStatementsOfOperations">
        <link:definition>0000005 - Statement - Consolidated Statements Of Operations</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsOfComprehensiveIncome" roleURI="http://www.suncommunities.com/role/ConsolidatedStatementsOfComprehensiveIncome">
        <link:definition>0000006 - Statement - Consolidated Statements Of Comprehensive Income</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementOfStockholdersEquity" roleURI="http://www.suncommunities.com/role/ConsolidatedStatementOfStockholdersEquity">
        <link:definition>0000007 - Statement - Consolidated Statement Of Stockholders' Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsOfCashFlows" roleURI="http://www.suncommunities.com/role/ConsolidatedStatementsOfCashFlows">
        <link:definition>0000008 - Statement - Consolidated Statements Of Cash Flows</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsofCashFlowsParenthetical" roleURI="http://www.suncommunities.com/role/ConsolidatedStatementsofCashFlowsParenthetical">
        <link:definition>0000009 - Statement - Consolidated Statements of Cash Flows (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SignificantAccountingPolicies" roleURI="http://www.suncommunities.com/role/SignificantAccountingPolicies">
        <link:definition>0000010 - Disclosure - Significant Accounting Policies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Revenue" roleURI="http://www.suncommunities.com/role/Revenue">
        <link:definition>0000011 - Disclosure - Revenue</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RealEstateAcquisitionsandDispositions" roleURI="http://www.suncommunities.com/role/RealEstateAcquisitionsandDispositions">
        <link:definition>0000012 - Disclosure - Real Estate Acquisitions and Dispositions</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NotesAndOtherReceivables" roleURI="http://www.suncommunities.com/role/NotesAndOtherReceivables">
        <link:definition>0000013 - Disclosure - Notes And Other Receivables</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandOtherIntangibleAssets" roleURI="http://www.suncommunities.com/role/GoodwillandOtherIntangibleAssets">
        <link:definition>0000014 - Disclosure - Goodwill and Other Intangible Assets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentinNonconsolidatedAffiliates" roleURI="http://www.suncommunities.com/role/InvestmentinNonconsolidatedAffiliates">
        <link:definition>0000015 - Disclosure - Investment in Nonconsolidated Affiliates</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedVariableInterestEntities" roleURI="http://www.suncommunities.com/role/ConsolidatedVariableInterestEntities">
        <link:definition>0000016 - Disclosure - Consolidated Variable Interest Entities</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtAndLinesOfCredit" roleURI="http://www.suncommunities.com/role/DebtAndLinesOfCredit">
        <link:definition>0000017 - Disclosure - Debt And Lines Of Credit</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EquityandTemporaryEquity" roleURI="http://www.suncommunities.com/role/EquityandTemporaryEquity">
        <link:definition>0000018 - Disclosure - Equity and Temporary Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensation" roleURI="http://www.suncommunities.com/role/ShareBasedCompensation">
        <link:definition>0000019 - Disclosure - Share-Based Compensation</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentReporting" roleURI="http://www.suncommunities.com/role/SegmentReporting">
        <link:definition>0000020 - Disclosure - Segment Reporting</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxes" roleURI="http://www.suncommunities.com/role/IncomeTaxes">
        <link:definition>0000021 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShare" roleURI="http://www.suncommunities.com/role/EarningsPerShare">
        <link:definition>0000022 - Disclosure - Earnings Per Share</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativeFinancialInstruments" roleURI="http://www.suncommunities.com/role/DerivativeFinancialInstruments">
        <link:definition>0000023 - Disclosure - Derivative Financial Instruments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueofFinancialInstruments" roleURI="http://www.suncommunities.com/role/FairValueofFinancialInstruments">
        <link:definition>0000024 - Disclosure - Fair Value of Financial Instruments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsAndContingencies" roleURI="http://www.suncommunities.com/role/CommitmentsAndContingencies">
        <link:definition>0000025 - Disclosure - Commitments And Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Leases" roleURI="http://www.suncommunities.com/role/Leases">
        <link:definition>0000026 - Disclosure - Leases</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RelatedPartyTransactions" roleURI="http://www.suncommunities.com/role/RelatedPartyTransactions">
        <link:definition>0000027 - Disclosure - Related Party Transactions</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RecentAccountingPronouncements" roleURI="http://www.suncommunities.com/role/RecentAccountingPronouncements">
        <link:definition>0000028 - Disclosure - Recent Accounting Pronouncements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SubsequentEvents" roleURI="http://www.suncommunities.com/role/SubsequentEvents">
        <link:definition>0000029 - Disclosure - Subsequent Events</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SCHEDULEIII" roleURI="http://www.suncommunities.com/role/SCHEDULEIII">
        <link:definition>0000030 - Disclosure - SCHEDULE III</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SignificantAccountingPoliciesSignificantAccountingPoliciesPolicies" roleURI="http://www.suncommunities.com/role/SignificantAccountingPoliciesSignificantAccountingPoliciesPolicies">
        <link:definition>0000031 - Disclosure - Significant Accounting Policies Significant Accounting Policies (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SignificantAccountingPoliciesSignificantAccountingPoliciesTables" roleURI="http://www.suncommunities.com/role/SignificantAccountingPoliciesSignificantAccountingPoliciesTables">
        <link:definition>0000032 - Disclosure - Significant Accounting Policies Significant Accounting Policies (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueTables" roleURI="http://www.suncommunities.com/role/RevenueTables">
        <link:definition>0000033 - Disclosure - Revenue (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RealEstateAcquisitionsandDispositionsTables" roleURI="http://www.suncommunities.com/role/RealEstateAcquisitionsandDispositionsTables">
        <link:definition>0000034 - Disclosure - Real Estate Acquisitions and Dispositions (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NotesAndOtherReceivablesTables" roleURI="http://www.suncommunities.com/role/NotesAndOtherReceivablesTables">
        <link:definition>0000035 - Disclosure - Notes And Other Receivables (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandOtherIntangibleAssetsTables" roleURI="http://www.suncommunities.com/role/GoodwillandOtherIntangibleAssetsTables">
        <link:definition>0000036 - Disclosure - Goodwill and Other Intangible Assets (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentsEquityMethodandJointVenturesTables" roleURI="http://www.suncommunities.com/role/InvestmentsEquityMethodandJointVenturesTables">
        <link:definition>0000037 - Disclosure - Investments, Equity Method and Joint Ventures (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedVariableInterestEntitiesConsolidatedVariableInterestEntitiesTables" roleURI="http://www.suncommunities.com/role/ConsolidatedVariableInterestEntitiesConsolidatedVariableInterestEntitiesTables">
        <link:definition>0000038 - Disclosure - Consolidated Variable Interest Entities Consolidated Variable Interest Entities (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtAndLinesOfCreditTables" roleURI="http://www.suncommunities.com/role/DebtAndLinesOfCreditTables">
        <link:definition>0000039 - Disclosure - Debt And Lines Of Credit (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EquityandTemporaryEquityTables" roleURI="http://www.suncommunities.com/role/EquityandTemporaryEquityTables">
        <link:definition>0000040 - Disclosure - Equity and Temporary Equity (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensationTables" roleURI="http://www.suncommunities.com/role/ShareBasedCompensationTables">
        <link:definition>0000041 - Disclosure - Share-Based Compensation (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentReportingTables" roleURI="http://www.suncommunities.com/role/SegmentReportingTables">
        <link:definition>0000042 - Disclosure - Segment Reporting (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesTables" roleURI="http://www.suncommunities.com/role/IncomeTaxesTables">
        <link:definition>0000043 - Disclosure - Income Taxes (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShareTables" roleURI="http://www.suncommunities.com/role/EarningsPerShareTables">
        <link:definition>0000044 - Disclosure - Earnings Per Share (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativeFinancialInstrumentsTables" roleURI="http://www.suncommunities.com/role/DerivativeFinancialInstrumentsTables">
        <link:definition>0000045 - Disclosure - Derivative Financial Instruments (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueofFinancialInstrumentsTables" roleURI="http://www.suncommunities.com/role/FairValueofFinancialInstrumentsTables">
        <link:definition>0000046 - Disclosure - Fair Value of Financial Instruments (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesTables" roleURI="http://www.suncommunities.com/role/LeasesTables">
        <link:definition>0000047 - Disclosure - Leases (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SignificantAccountingPoliciesSignificantAccountingPoliciesDetails" roleURI="http://www.suncommunities.com/role/SignificantAccountingPoliciesSignificantAccountingPoliciesDetails">
        <link:definition>0000048 - Disclosure - Significant Accounting Policies Significant Accounting Policies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueDetails" roleURI="http://www.suncommunities.com/role/RevenueDetails">
        <link:definition>0000049 - Disclosure - Revenue (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RealEstateAcquisitionsandDispositionsScheduleOfAcquisitionsDetails" roleURI="http://www.suncommunities.com/role/RealEstateAcquisitionsandDispositionsScheduleOfAcquisitionsDetails">
        <link:definition>0000050 - Disclosure - Real Estate Acquisitions and Dispositions, Schedule Of Acquisitions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RealEstateAcquisitionsandDispositionsScheduleOfAssetsAcquiredandLiabilitiesAssumedDetails" roleURI="http://www.suncommunities.com/role/RealEstateAcquisitionsandDispositionsScheduleOfAssetsAcquiredandLiabilitiesAssumedDetails">
        <link:definition>0000051 - Disclosure - Real Estate Acquisitions and Dispositions, Schedule Of Assets Acquired and Liabilities Assumed (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RealEstateAcquisitionsandDispositionsScheduleOfAssetsAcquiredandLiabilitiesAssumedDetails_1" roleURI="http://www.suncommunities.com/role/RealEstateAcquisitionsandDispositionsScheduleOfAssetsAcquiredandLiabilitiesAssumedDetails_1">
        <link:definition>0000051 - Disclosure - Real Estate Acquisitions and Dispositions, Schedule Of Assets Acquired and Liabilities Assumed (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RealEstateAcquisitionsandDispositionsNarrativeDetails" roleURI="http://www.suncommunities.com/role/RealEstateAcquisitionsandDispositionsNarrativeDetails">
        <link:definition>0000052 - Disclosure - Real Estate Acquisitions and Dispositions, Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RealEstateAcquisitionsandDispositionsProFormaDetails" roleURI="http://www.suncommunities.com/role/RealEstateAcquisitionsandDispositionsProFormaDetails">
        <link:definition>0000053 - Disclosure - Real Estate Acquisitions and Dispositions, Pro Forma (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NotesAndOtherReceivablesScheduleofnotesandotherreceivablesDetails" roleURI="http://www.suncommunities.com/role/NotesAndOtherReceivablesScheduleofnotesandotherreceivablesDetails">
        <link:definition>0000054 - Disclosure - Notes And Other Receivables, Schedule of notes and other receivables (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NotesAndOtherReceivablesNarrativeDetails" roleURI="http://www.suncommunities.com/role/NotesAndOtherReceivablesNarrativeDetails">
        <link:definition>0000055 - Disclosure - Notes And Other Receivables, Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NotesAndOtherReceivablesScheduleofOtherInvestmentsDetails" roleURI="http://www.suncommunities.com/role/NotesAndOtherReceivablesScheduleofOtherInvestmentsDetails">
        <link:definition>0000056 - Disclosure - Notes And Other Receivables, Schedule of Other Investments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandOtherIntangibleAssetsScheduleofGoodwillDetails" roleURI="http://www.suncommunities.com/role/GoodwillandOtherIntangibleAssetsScheduleofGoodwillDetails">
        <link:definition>0000057 - Disclosure - Goodwill and Other Intangible Assets, Schedule of Goodwill (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandOtherIntangibleAssetsScheduleofOtherIntangibleAssetsDetails" roleURI="http://www.suncommunities.com/role/GoodwillandOtherIntangibleAssetsScheduleofOtherIntangibleAssetsDetails">
        <link:definition>0000058 - Disclosure - Goodwill and Other Intangible Assets, Schedule of Other Intangible Assets (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandOtherIntangibleAssetsScheduleofIntangibleAssetAmortizationExpenseDetails" roleURI="http://www.suncommunities.com/role/GoodwillandOtherIntangibleAssetsScheduleofIntangibleAssetAmortizationExpenseDetails">
        <link:definition>0000059 - Disclosure - Goodwill and Other Intangible Assets, Schedule of Intangible Asset Amortization Expense (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentinNonconsolidatedAffiliatesNarrativeDetails" roleURI="http://www.suncommunities.com/role/InvestmentinNonconsolidatedAffiliatesNarrativeDetails">
        <link:definition>0000060 - Disclosure - Investment in Nonconsolidated Affiliates, Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentinNonconsolidatedAffiliatesScheduleofInvestmentsDetails" roleURI="http://www.suncommunities.com/role/InvestmentinNonconsolidatedAffiliatesScheduleofInvestmentsDetails">
        <link:definition>0000061 - Disclosure - Investment in Nonconsolidated Affiliates, Schedule of Investments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedVariableInterestEntitiesNarrativeDetails" roleURI="http://www.suncommunities.com/role/ConsolidatedVariableInterestEntitiesNarrativeDetails">
        <link:definition>0000062 - Disclosure - Consolidated Variable Interest Entities, Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedVariableInterestEntitiesScheduleofVIEDetails" roleURI="http://www.suncommunities.com/role/ConsolidatedVariableInterestEntitiesScheduleofVIEDetails">
        <link:definition>0000063 - Disclosure - Consolidated Variable Interest Entities, Schedule of VIE (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtAndLinesOfCreditScheduleofdebtandlinesofcreditDetails" roleURI="http://www.suncommunities.com/role/DebtAndLinesOfCreditScheduleofdebtandlinesofcreditDetails">
        <link:definition>0000064 - Disclosure - Debt And Lines Of Credit, Schedule of debt and lines of credit (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtAndLinesOfCreditScheduleofDebtExtinguishmentDetails" roleURI="http://www.suncommunities.com/role/DebtAndLinesOfCreditScheduleofDebtExtinguishmentDetails">
        <link:definition>0000065 - Disclosure - Debt And Lines Of Credit, Schedule of Debt Extinguishment (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtAndLinesOfCreditNarrativeDetails" roleURI="http://www.suncommunities.com/role/DebtAndLinesOfCreditNarrativeDetails">
        <link:definition>0000066 - Disclosure - Debt And Lines Of Credit, Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtAndLinesOfCreditScheduleofMaturitiesandAmortizationofdebtandlinesofcreditDetails" roleURI="http://www.suncommunities.com/role/DebtAndLinesOfCreditScheduleofMaturitiesandAmortizationofdebtandlinesofcreditDetails">
        <link:definition>0000067 - Disclosure - Debt And Lines Of Credit, Schedule of Maturities and Amortization of debt and lines of credit (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EquityandTemporaryEquityScheduleofPreferredUnitsDetails" roleURI="http://www.suncommunities.com/role/EquityandTemporaryEquityScheduleofPreferredUnitsDetails">
        <link:definition>0000068 - Disclosure - Equity and Temporary Equity, Schedule of Preferred Units (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EquityandTemporaryEquityScheduleofRedeemableEquityDetails" roleURI="http://www.suncommunities.com/role/EquityandTemporaryEquityScheduleofRedeemableEquityDetails">
        <link:definition>0000069 - Disclosure - Equity and Temporary Equity, Schedule of Redeemable Equity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EquityandTemporaryEquityNarrativeDetails" roleURI="http://www.suncommunities.com/role/EquityandTemporaryEquityNarrativeDetails">
        <link:definition>0000070 - Disclosure - Equity and Temporary Equity, Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EquityandTemporaryEquityScheduleofConversionsDetails" roleURI="http://www.suncommunities.com/role/EquityandTemporaryEquityScheduleofConversionsDetails">
        <link:definition>0000071 - Disclosure - Equity and Temporary Equity, Schedule of Conversions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EquityandTemporaryEquityScheduleofDistributionsDetails" roleURI="http://www.suncommunities.com/role/EquityandTemporaryEquityScheduleofDistributionsDetails">
        <link:definition>0000072 - Disclosure - Equity and Temporary Equity, Schedule of Distributions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensationNarrativeDetails" roleURI="http://www.suncommunities.com/role/ShareBasedCompensationNarrativeDetails">
        <link:definition>0000073 - Disclosure - Share-Based Compensation, Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensationScheduleofGrantedSharesDetails" roleURI="http://www.suncommunities.com/role/ShareBasedCompensationScheduleofGrantedSharesDetails">
        <link:definition>0000074 - Disclosure - Share-Based Compensation, Schedule of Granted Shares (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensationScheduleofRestrictedStockActivityDetails" roleURI="http://www.suncommunities.com/role/ShareBasedCompensationScheduleofRestrictedStockActivityDetails">
        <link:definition>0000075 - Disclosure - Share-Based Compensation, Schedule of Restricted Stock Activity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensationScheduleofExpectedShareBasedCompensationDetails" roleURI="http://www.suncommunities.com/role/ShareBasedCompensationScheduleofExpectedShareBasedCompensationDetails">
        <link:definition>0000076 - Disclosure - Share-Based Compensation, Schedule of Expected Share Based Compensation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentReportingDetails" roleURI="http://www.suncommunities.com/role/SegmentReportingDetails">
        <link:definition>0000077 - Disclosure - Segment Reporting (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesNarrativeDetails" roleURI="http://www.suncommunities.com/role/IncomeTaxesNarrativeDetails">
        <link:definition>0000078 - Disclosure - Income Taxes, Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesScheduleofCharacterizationofDistributionsDetails" roleURI="http://www.suncommunities.com/role/IncomeTaxesScheduleofCharacterizationofDistributionsDetails">
        <link:definition>0000079 - Disclosure - Income Taxes, Schedule of Characterization of Distributions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesScheduleofComponentsofIncomeTaxesDetails" roleURI="http://www.suncommunities.com/role/IncomeTaxesScheduleofComponentsofIncomeTaxesDetails">
        <link:definition>0000080 - Disclosure - Income Taxes, Schedule of Components of Income Taxes (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesReconciliationoftheProvisionforIncomeTaxesDetails" roleURI="http://www.suncommunities.com/role/IncomeTaxesReconciliationoftheProvisionforIncomeTaxesDetails">
        <link:definition>0000081 - Disclosure - Income Taxes, Reconciliation of the Provision for Income Taxes (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesScheduleofDeferredTaxAssetsandLiabilitiesDetails" roleURI="http://www.suncommunities.com/role/IncomeTaxesScheduleofDeferredTaxAssetsandLiabilitiesDetails">
        <link:definition>0000082 - Disclosure - Income Taxes, Schedule of Deferred Tax Assets and Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShareScheduleofCalculationofNumeratoranddenominatorDetails" roleURI="http://www.suncommunities.com/role/EarningsPerShareScheduleofCalculationofNumeratoranddenominatorDetails">
        <link:definition>0000083 - Disclosure - Earnings Per Share. Schedule of Calculation of Numerator and denominator (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShareScheduleofAntidilutiveSecuritiesExcludedfromComputationofLossPerShareDetails" roleURI="http://www.suncommunities.com/role/EarningsPerShareScheduleofAntidilutiveSecuritiesExcludedfromComputationofLossPerShareDetails">
        <link:definition>0000084 - Disclosure - Earnings Per Share, Schedule of Antidilutive Securities Excluded from Computation of Loss Per Share (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativeFinancialInstrumentsNarrativeDetails" roleURI="http://www.suncommunities.com/role/DerivativeFinancialInstrumentsNarrativeDetails">
        <link:definition>0000085 - Disclosure - Derivative Financial Instruments, Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativeFinancialInstrumentsScheduleofDerivativeInstrumentsDetails" roleURI="http://www.suncommunities.com/role/DerivativeFinancialInstrumentsScheduleofDerivativeInstrumentsDetails">
        <link:definition>0000086 - Disclosure - Derivative Financial Instruments, Schedule of Derivative Instruments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueofFinancialInstrumentsScheduleofAssetsandLiabilitiesMeasuredonaRecurringBasisDetails" roleURI="http://www.suncommunities.com/role/FairValueofFinancialInstrumentsScheduleofAssetsandLiabilitiesMeasuredonaRecurringBasisDetails">
        <link:definition>0000087 - Disclosure - Fair Value of Financial Instruments, Schedule of Assets and Liabilities Measured on a Recurring Basis (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueofFinancialInstrumentsScheduleofBalanceSheetGroupingDetailsDetails" roleURI="http://www.suncommunities.com/role/FairValueofFinancialInstrumentsScheduleofBalanceSheetGroupingDetailsDetails">
        <link:definition>0000088 - Disclosure - Fair Value of Financial Instruments, Schedule of Balance Sheet Grouping (Details) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueofFinancialInstrumentsNarrativeDetailsDetails" roleURI="http://www.suncommunities.com/role/FairValueofFinancialInstrumentsNarrativeDetailsDetails">
        <link:definition>0000089 - Disclosure - Fair Value of Financial Instruments, Narrative (Details) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueofFinancialInstrumentsScheduleofFairValueMeasurementsDetails" roleURI="http://www.suncommunities.com/role/FairValueofFinancialInstrumentsScheduleofFairValueMeasurementsDetails">
        <link:definition>0000090 - Disclosure - Fair Value of Financial Instruments, Schedule of Fair Value Measurements (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesDetails" roleURI="http://www.suncommunities.com/role/CommitmentsandContingenciesDetails">
        <link:definition>0000091 - Disclosure - Commitments and Contingencies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesScheduleofFutureMinimumLeasePaymentsDetail" roleURI="http://www.suncommunities.com/role/LeasesScheduleofFutureMinimumLeasePaymentsDetail">
        <link:definition>0000092 - Disclosure - Leases, Schedule of Future Minimum Lease Payments (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesScheduleofFutureMinimumLeasePaymentsDetail_1" roleURI="http://www.suncommunities.com/role/LeasesScheduleofFutureMinimumLeasePaymentsDetail_1">
        <link:definition>0000092 - Disclosure - Leases, Schedule of Future Minimum Lease Payments (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesScheduleofFutureMinimumLeasePaymentsDetail_2" roleURI="http://www.suncommunities.com/role/LeasesScheduleofFutureMinimumLeasePaymentsDetail_2">
        <link:definition>0000092 - Disclosure - Leases, Schedule of Future Minimum Lease Payments (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesScheduleofROUAssetsandLeaseliabilitiesDetails" roleURI="http://www.suncommunities.com/role/LeasesScheduleofROUAssetsandLeaseliabilitiesDetails">
        <link:definition>0000093 - Disclosure - Leases, Schedule of ROU Assets and Lease liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesScheduleofLeaseExpenseDetails" roleURI="http://www.suncommunities.com/role/LeasesScheduleofLeaseExpenseDetails">
        <link:definition>0000094 - Disclosure - Leases, Schedule of Lease Expense (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesAdditionalInformationDetails" roleURI="http://www.suncommunities.com/role/LeasesAdditionalInformationDetails">
        <link:definition>0000095 - Disclosure - Leases, Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesLessorFutureLeasePaymentsDetails" roleURI="http://www.suncommunities.com/role/LeasesLessorFutureLeasePaymentsDetails">
        <link:definition>0000096 - Disclosure - Leases, Lessor Future Lease Payments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesNarrativeDetails" roleURI="http://www.suncommunities.com/role/LeasesNarrativeDetails">
        <link:definition>0000097 - Disclosure - Leases, Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesScheduleofMaturitiesofFinancialLiabilityDetails" roleURI="http://www.suncommunities.com/role/LeasesScheduleofMaturitiesofFinancialLiabilityDetails">
        <link:definition>0000098 - Disclosure - Leases, Schedule of Maturities of Financial Liability (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesScheduleofMaturitiesofFinancialLiabilityDetails_1" roleURI="http://www.suncommunities.com/role/LeasesScheduleofMaturitiesofFinancialLiabilityDetails_1">
        <link:definition>0000098 - Disclosure - Leases, Schedule of Maturities of Financial Liability (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RelatedPartyTransactionsDetails" roleURI="http://www.suncommunities.com/role/RelatedPartyTransactionsDetails">
        <link:definition>0000099 - Disclosure - Related Party Transactions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SubsequentEventsNarrativeDetails" roleURI="http://www.suncommunities.com/role/SubsequentEventsNarrativeDetails">
        <link:definition>0000100 - Disclosure - Subsequent Events, Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SCHEDULEIIIScheduleofPropertyDetails" roleURI="http://www.suncommunities.com/role/SCHEDULEIIIScheduleofPropertyDetails">
        <link:definition>0000101 - Disclosure - SCHEDULE III, Schedule of Property (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SCHEDULEIIIInvestmentpropertyreconciliationDetails" roleURI="http://www.suncommunities.com/role/SCHEDULEIIIInvestmentpropertyreconciliationDetails">
        <link:definition>0000102 - Disclosure - SCHEDULE III, Investment property reconciliation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SCHEDULEIIIAccumulateddepreciationreconciliationDetails" roleURI="http://www.suncommunities.com/role/SCHEDULEIIIAccumulateddepreciationreconciliationDetails">
        <link:definition>0000103 - Disclosure - SCHEDULE III, Accumulated depreciation reconciliation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:element id="sui_SunOutdoorsNewOrleansNorthShoreMember" abstract="true" name="SunOutdoorsNewOrleansNorthShoreMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborWaldenMember" abstract="true" name="SafeHarborWaldenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ScheduleofSaleofCommonStockTableTextBlock" abstract="false" name="ScheduleofSaleofCommonStockTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="sui_SafeHarborPeninsulaYachtClubMember" abstract="true" name="SafeHarborPeninsulaYachtClubMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BellCrossingMember" abstract="true" name="BellCrossingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborOuterBanksMember" abstract="true" name="SafeHarborOuterBanksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LakesideCrossingMember" abstract="true" name="LakesideCrossingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_InstallmentNotesReceivableOnManufacturedHomesNetMember" abstract="true" name="InstallmentNotesReceivableOnManufacturedHomesNetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AggregateNumberOfSharesToBeIssuedPublicOffering" abstract="false" name="AggregateNumberOfSharesToBeIssuedPublicOffering" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="sui_KeyEmployeesMember" abstract="true" name="KeyEmployeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WoodlandsatChurchLakeMember" abstract="true" name="WoodlandsatChurchLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FinancialLiabilityToBePaid" abstract="false" name="FinancialLiabilityToBePaid" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" abstract="false" name="AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_WarrenDunesVillageMember" abstract="true" name="WarrenDunesVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LazyJRanchMember" abstract="true" name="LazyJRanchMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunValleyMember" abstract="true" name="SunValleyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CoverPageAbstract" abstract="true" name="CoverPageAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="sui_AcademywestpointMember" abstract="true" name="AcademywestpointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CiderMillVillageMember" abstract="true" name="CiderMillVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborEmeraldCoastMember" abstract="true" name="SafeHarborEmeraldCoastMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HiddenRiverRVResortMember" abstract="true" name="HiddenRiverRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborGrandIsleMember" abstract="true" name="SafeHarborGrandIsleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CoyoteRanchResortMember" abstract="true" name="CoyoteRanchResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LakeviewMember" abstract="true" name="LakeviewMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NumberOfSharesSoldInForwardSaleTransaction" abstract="false" name="NumberOfSharesSoldInForwardSaleTransaction" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="sui_TurnberryMember" abstract="true" name="TurnberryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RealEstateInvestmentPropertyLandImprovementsAndBuildings" abstract="false" name="RealEstateInvestmentPropertyLandImprovementsAndBuildings" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SouthernPinesMember" abstract="true" name="SouthernPinesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_GoldcoasterMember" abstract="true" name="GoldcoasterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborWisdomDockMember" abstract="true" name="SafeHarborWisdomDockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborCapriMember" abstract="true" name="SafeHarborCapriMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsChincoteagueBayMember" abstract="true" name="SunOutdoorsChincoteagueBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CarolinaPinesRVResortMember" abstract="true" name="CarolinaPinesRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_VariableInterestEntityContingentConsiderationEarnoutProvision" abstract="false" name="VariableInterestEntityContingentConsiderationEarnoutProvision" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_OakCrestMember" abstract="true" name="OakCrestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedAfterThreeYears" abstract="false" name="EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedAfterThreeYears" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SafeHarborSunroadMarinaMember" abstract="true" name="SafeHarborSunroadMarinaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_Brokeragecommissionsandotherincomenet" abstract="false" name="Brokeragecommissionsandotherincomenet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_ParkRoyaleMember" abstract="true" name="ParkRoyaleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TimberRidgeMember" abstract="true" name="TimberRidgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WestbrookVillageMember" abstract="true" name="WestbrookVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ForestViewMember" abstract="true" name="ForestViewMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeniorUnsecuredNotesJuly2031MaturityFirstTrancheMember" abstract="true" name="SeniorUnsecuredNotesJuly2031MaturityFirstTrancheMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DeepRunMember" abstract="true" name="DeepRunMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PheasantRidgeRVParkMember" abstract="true" name="PheasantRidgeRVParkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AssetAcquisitionAndBusinessCombinationConsiderationTransferredEquityIssuedAndIssuable" abstract="false" name="AssetAcquisitionAndBusinessCombinationConsiderationTransferredEquityIssuedAndIssuable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SafeHarborFerryPointMember" abstract="true" name="SafeHarborFerryPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HolidayParkEstatesMember" abstract="true" name="HolidayParkEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RiverHavenMember" abstract="true" name="RiverHavenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PublicOfferingMember" abstract="true" name="PublicOfferingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborWestportMember" abstract="true" name="SafeHarborWestportMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunCommunitiesMember" abstract="true" name="SunCommunitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AlbertaMember" abstract="true" name="AlbertaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OakIslandVillageMember" abstract="true" name="OakIslandVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RelatedPartyTransactionsCurrentandFutureBaseRent" abstract="false" name="RelatedPartyTransactionsCurrentandFutureBaseRent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:decimalItemType"/>
  <xs:element id="sui_SandyLakeMHRVResortMember" abstract="true" name="SandyLakeMHRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RequiredMinimumPercentOfTaxableIncomeDistributedToStockHolders" abstract="false" name="RequiredMinimumPercentOfTaxableIncomeDistributedToStockHolders" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sui_FinancialLiabilityToBePaidYearFour" abstract="false" name="FinancialLiabilityToBePaidYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_RevolvingLoanMember" abstract="true" name="RevolvingLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RiverRanchMember" abstract="true" name="RiverRanchMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_StingrayPointMember" abstract="true" name="StingrayPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OrigenFinancialServicesMember" abstract="true" name="OrigenFinancialServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CollateralizedReceivablesMember" abstract="true" name="CollateralizedReceivablesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TemporaryEquity" abstract="false" name="TemporaryEquity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SafeHarborSilverSpringMember" abstract="true" name="SafeHarborSilverSpringMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsSandbanksMember" abstract="true" name="SunRetreatsSandbanksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborBruceJohnsonsMember" abstract="true" name="SafeHarborBruceJohnsonsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ChantryMember" abstract="true" name="ChantryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_Debtweightedaveragetomaturitylength" abstract="false" name="Debtweightedaveragetomaturitylength" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="sui_PuertoDelReyMember" abstract="true" name="PuertoDelReyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BrentwoodVillageMember" abstract="true" name="BrentwoodVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OperatingandFinanceLiabilityPaymentsDueYearThree" abstract="false" name="OperatingandFinanceLiabilityPaymentsDueYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SunOutdoorsPigeonForgeMember" abstract="true" name="SunOutdoorsPigeonForgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SandLeMereMember" abstract="true" name="SandLeMereMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunNGRVResortsMember" abstract="true" name="SunNGRVResortsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DirectorPlansMember" abstract="true" name="DirectorPlansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HollyShoresCampingResortMember" abstract="true" name="HollyShoresCampingResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsSugarloafKeyMember" abstract="true" name="SunOutdoorsSugarloafKeyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AnnualRvSitesMember" abstract="true" name="AnnualRvSitesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RevenueFromHomeSalesMember" abstract="true" name="RevenueFromHomeSalesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborYachtHavenMember" abstract="true" name="SafeHarborYachtHavenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WellsBeachResortCampgroundMember" abstract="true" name="WellsBeachResortCampgroundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_InsuranceReceivables" abstract="false" name="InsuranceReceivables" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_ParkLeisureMember" abstract="true" name="ParkLeisureMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CarriageCoveMember" abstract="true" name="CarriageCoveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborWentworthByTheSeaMember" abstract="true" name="SafeHarborWentworthByTheSeaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunlakeEstatesMember" abstract="true" name="SunlakeEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NGSunTRSBeaverBrookLLCMember" abstract="true" name="NGSunTRSBeaverBrookLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsMarathonMember" abstract="true" name="SunOutdoorsMarathonMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FriendlyVillageofWestCovinaMember" abstract="true" name="FriendlyVillageofWestCovinaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsGwynnsIslandMember" abstract="true" name="SunRetreatsGwynnsIslandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CountrysideEstatesMember" abstract="true" name="CountrysideEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborGreatIslandMember" abstract="true" name="SafeHarborGreatIslandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HomeSaleProceeds" abstract="false" name="HomeSaleProceeds" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_WhiteLakeMember" abstract="true" name="WhiteLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HorseshoeCoveRVResortMember" abstract="true" name="HorseshoeCoveRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeriesA1PreferredOpUnitsMember" abstract="true" name="SeriesA1PreferredOpUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PismoDunesMember" abstract="true" name="PismoDunesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LeaseDescriptionAxis" abstract="true" name="LeaseDescriptionAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="sui_EastVillageEstatesMember" abstract="true" name="EastVillageEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RedOaksRVResortMember" abstract="true" name="RedOaksRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborMarinaBayMember" abstract="true" name="SafeHarborMarinaBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeawickMember" abstract="true" name="SeawickMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_UndrawnFundsOnLoans" abstract="false" name="UndrawnFundsOnLoans" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SpanishTrailsMHCMember" abstract="true" name="SpanishTrailsMHCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MiTeJoCampgroundMember" abstract="true" name="MiTeJoCampgroundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborBeaverCreekMember" abstract="true" name="SafeHarborBeaverCreekMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TreasuryLockAndForwardSwapMember" abstract="true" name="TreasuryLockAndForwardSwapMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_EquityInterests" abstract="false" name="EquityInterests" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_ChristiesParksMember" abstract="true" name="ChristiesParksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WestMerseaMember" abstract="true" name="WestMerseaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CommonAndPreferredStockSharesAuthorized" abstract="false" name="CommonAndPreferredStockSharesAuthorized" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="sui_SunRetreatsGenevaOnTheLakeMember" abstract="true" name="SunRetreatsGenevaOnTheLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsSilverLakeMember" abstract="true" name="SunRetreatsSilverLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeniorUnsecuredNotesMember" abstract="true" name="SeniorUnsecuredNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PurchasesAndInssurancesMember" abstract="true" name="PurchasesAndInssurancesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborDauntlessShipyardMember" abstract="true" name="SafeHarborDauntlessShipyardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WoodsideTerraceMember" abstract="true" name="WoodsideTerraceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RentalpropertiesMember" abstract="true" name="RentalpropertiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_StockIssuedDuringPeriodValueNewIssuesSeriesA3PreferredOPUnits" abstract="false" name="StockIssuedDuringPeriodValueNewIssuesSeriesA3PreferredOPUnits" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SHMSouthForkJVLLCMember" abstract="true" name="SHMSouthForkJVLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TemporaryEquityDividends" abstract="false" name="TemporaryEquityDividends" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_ChangesInFairValueLevel3Domain" abstract="true" name="ChangesInFairValueLevel3Domain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BakerAcresMember" abstract="true" name="BakerAcresMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RealEstateDispositionsAndOther" abstract="false" name="RealEstateDispositionsAndOther" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_LakeviewCTMember" abstract="true" name="LakeviewCTMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NotesReceivableFairValueAdjustment" abstract="false" name="NotesReceivableFairValueAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_TemporaryEquityAcquisitionOfEquityInterests" abstract="false" name="TemporaryEquityAcquisitionOfEquityInterests" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_FarmwoodVillageMember" abstract="true" name="FarmwoodVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NorwayCommonsMember" abstract="true" name="NorwayCommonsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborHacksPointMember" abstract="true" name="SafeHarborHacksPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SkyHarborMember" abstract="true" name="SkyHarborMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BlueWaterBeachResortMember" abstract="true" name="BlueWaterBeachResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HillcrestMember" abstract="true" name="HillcrestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SylvanCrossingMember" abstract="true" name="SylvanCrossingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DistributionsFromAffiliate" abstract="false" name="DistributionsFromAffiliate" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_AllowanceForRentWaterSewerUsageReceivables" abstract="false" name="AllowanceForRentWaterSewerUsageReceivables" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_OceanViewMember" abstract="true" name="OceanViewMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RiverRidgeMember" abstract="true" name="RiverRidgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CiderMillCrossingsMember" abstract="true" name="CiderMillCrossingsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NumberOfCollateralizedTermLoans" abstract="false" name="NumberOfCollateralizedTermLoans" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_SafeHarborBohemiaVistaMember" abstract="true" name="SafeHarborBohemiaVistaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_JellystoneParkOfChicagoMember" abstract="true" name="JellystoneParkOfChicagoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_KissimmeeSouthRVResortMember" abstract="true" name="KissimmeeSouthRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WoodlandParkEstatesMember" abstract="true" name="WoodlandParkEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborHarborageYachtClubMember" abstract="true" name="SafeHarborHarborageYachtClubMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CommissionMaximumPercentageofGrossSalesPricePerShareAccordingtoSalesAgreement" abstract="false" name="CommissionMaximumPercentageofGrossSalesPricePerShareAccordingtoSalesAgreement" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sui_HengarManorMember" abstract="true" name="HengarManorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BelAirEstatesMember" abstract="true" name="BelAirEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OakwoodVillageMember" abstract="true" name="OakwoodVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_IndianCreekParkMember" abstract="true" name="IndianCreekParkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ParSandsMember" abstract="true" name="ParSandsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborManasquanRiverMember" abstract="true" name="SafeHarborManasquanRiverMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborPinelandMember" abstract="true" name="SafeHarborPinelandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsLakeRudolphMember" abstract="true" name="SunOutdoorsLakeRudolphMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TownCountryMember" abstract="true" name="TownCountryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CrossroadsMember" abstract="true" name="CrossroadsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MortgageTermLoansMember" abstract="true" name="MortgageTermLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborKitteryPointMember" abstract="true" name="SafeHarborKitteryPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TotalPermanentEquityMember" abstract="true" name="TotalPermanentEquityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MarcoNaplesRVResortMember" abstract="true" name="MarcoNaplesRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HaciendadelRioMember" abstract="true" name="HaciendadelRioMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_StonebridgeRichfieldTownshipMiMember" abstract="true" name="StonebridgeRichfieldTownshipMiMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PalmCreekGolfRVResortMember" abstract="true" name="PalmCreekGolfRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborPilotsPointMember" abstract="true" name="SafeHarborPilotsPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsAmherstburgMember" abstract="true" name="SunRetreatsAmherstburgMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_YankeeVillageMember" abstract="true" name="YankeeVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborHarbortownMember" abstract="true" name="SafeHarborHarbortownMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LakesideMember" abstract="true" name="LakesideMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_VizcayaLakesMember" abstract="true" name="VizcayaLakesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborOxfordMember" abstract="true" name="SafeHarborOxfordMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FinancialLiabilityToBePaidYearThree" abstract="false" name="FinancialLiabilityToBePaidYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_MarinasHeadquartersAndOtherMember" abstract="true" name="MarinasHeadquartersAndOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_JellystoneParkTMChincoteagueIslandMember" abstract="true" name="JellystoneParkTMChincoteagueIslandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NumberOfHousingSitesSold" abstract="false" name="NumberOfHousingSitesSold" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_PakefieldMember" abstract="true" name="PakefieldMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborIslamoradaMember" abstract="true" name="SafeHarborIslamoradaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TamaracVillageMHRVResortMember" abstract="true" name="TamaracVillageMHRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HartsMember" abstract="true" name="HartsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_GrandLakesRVGolfResortMember" abstract="true" name="GrandLakesRVGolfResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborMarathonMember" abstract="true" name="SafeHarborMarathonMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SundanceMember" abstract="true" name="SundanceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_EquityMethodInvestmentFairValueAdjustment" abstract="false" name="EquityMethodInvestmentFairValueAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SafeHarborBurntStoreMember" abstract="true" name="SafeHarborBurntStoreMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborWickfordMember" abstract="true" name="SafeHarborWickfordMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CorporateHeadquartersMember" abstract="true" name="CorporateHeadquartersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AllUKPropertiesExcludingCorporateHeadquartersMember" abstract="true" name="AllUKPropertiesExcludingCorporateHeadquartersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborOnsetBayMember" abstract="true" name="SafeHarborOnsetBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_EarlyTerminationOfLease" abstract="false" name="EarlyTerminationOfLease" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_JellystoneParkTMAndroscogginLakeMember" abstract="true" name="JellystoneParkTMAndroscogginLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TimeBasedMember" abstract="true" name="TimeBasedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeriesEPreferredOPUnitsMember" abstract="true" name="SeriesEPreferredOPUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CitrusHillRVResortMember" abstract="true" name="CitrusHillRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ShelbyForestMember" abstract="true" name="ShelbyForestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OuterBanksMember" abstract="true" name="OuterBanksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborStirlingMember" abstract="true" name="SafeHarborStirlingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOtherAdjustments" abstract="false" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOtherAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_PelicanBayMember" abstract="true" name="PelicanBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_GoldenSandsMember" abstract="true" name="GoldenSandsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BlueWaterLoanMember" abstract="true" name="BlueWaterLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MerrymeetingMember" abstract="true" name="MerrymeetingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunSolarEnergyProjectCAIIMember" abstract="true" name="SunSolarEnergyProjectCAIIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RudgateClintonMember" abstract="true" name="RudgateClintonMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborAllenHarborMember" abstract="true" name="SafeHarborAllenHarborMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborPortRoyalMember" abstract="true" name="SafeHarborPortRoyalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RezPlotMember" abstract="true" name="RezPlotMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SilverSpringsMember" abstract="true" name="SilverSpringsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ButtonwoodBayMember" abstract="true" name="ButtonwoodBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CentralParkMHRVResortMember" abstract="true" name="CentralParkMHRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WymberlyMember" abstract="true" name="WymberlyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WaldenWoodsIIMember" abstract="true" name="WaldenWoodsIIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FinancialLiabilityToBePaidYearFive" abstract="false" name="FinancialLiabilityToBePaidYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SavannaClubMember" abstract="true" name="SavannaClubMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeriesJPreferredOPUnitsMember" abstract="true" name="SeriesJPreferredOPUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CollateralizedTermLoan2Member" abstract="true" name="CollateralizedTermLoan2Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsRehobothBayMember" abstract="true" name="SunRetreatsRehobothBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeaAirMember" abstract="true" name="SeaAirMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborMysticMember" abstract="true" name="SafeHarborMysticMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RiversideDriveParkMember" abstract="true" name="RiversideDriveParkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BrentwoodEstatesMember" abstract="true" name="BrentwoodEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WillowBendMember" abstract="true" name="WillowBendMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RockCrusherCanyonRVParkMember" abstract="true" name="RockCrusherCanyonRVParkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_InvestmentFairValueAdjustment" abstract="false" name="InvestmentFairValueAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_ScheduleOfRedeemableEquityTableTextBlock" abstract="false" name="ScheduleOfRedeemableEquityTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="sui_GainLossOnRemeasurementOfMarketableSecurities" abstract="false" name="GainLossOnRemeasurementOfMarketableSecurities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_CampFimfoMember" abstract="true" name="CampFimfoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_June2021SalesAgreementMember" abstract="true" name="June2021SalesAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OperatingandFinanceLiabilityPaymentsDueYearFour" abstract="false" name="OperatingandFinanceLiabilityPaymentsDueYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_TemporaryEquityDividendsForTermOnePercentage" abstract="false" name="TemporaryEquityDividendsForTermOnePercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sui_DebtInstrumentBasisPriceinStockConversionCalculation" abstract="false" name="DebtInstrumentBasisPriceinStockConversionCalculation" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="sui_VernonDeneMember" abstract="true" name="VernonDeneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CreeksCrossingMember" abstract="true" name="CreeksCrossingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OptionToRepurchaseFailedSaleLeasebackTransactionAmount" abstract="false" name="OptionToRepurchaseFailedSaleLeasebackTransactionAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SafeHarborBelleMaerMember" abstract="true" name="SafeHarborBelleMaerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LatanaRanchSouthMember" abstract="true" name="LatanaRanchSouthMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ContingentConsiderationLiabilityMember" abstract="true" name="ContingentConsiderationLiabilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ShadyPinesMHRVResortMember" abstract="true" name="ShadyPinesMHRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SHMSouthForkJVLLCPropertiesMember" abstract="true" name="SHMSouthForkJVLLCPropertiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DawlishSandsMember" abstract="true" name="DawlishSandsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborPlymouthMember" abstract="true" name="SafeHarborPlymouthMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OperatingandFinanceLiabilityPaymentsDueYearFive" abstract="false" name="OperatingandFinanceLiabilityPaymentsDueYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_MeadowbrookVillageMember" abstract="true" name="MeadowbrookVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CypressGreensMember" abstract="true" name="CypressGreensMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SteepleBayMember" abstract="true" name="SteepleBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TheRidgeMember" abstract="true" name="TheRidgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NGSunLLCMember" abstract="true" name="NGSunLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_GainLossOnRemeasurementOfInvestment" abstract="false" name="GainLossOnRemeasurementOfInvestment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SuffolkSandsMember" abstract="true" name="SuffolkSandsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NorthPointEstatesMember" abstract="true" name="NorthPointEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ArborWoodsMember" abstract="true" name="ArborWoodsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborLakefrontMember" abstract="true" name="SafeHarborLakefrontMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MajesticOaksRVResortMember" abstract="true" name="MajesticOaksRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CoghurstHallMember" abstract="true" name="CoghurstHallMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CobusGreenMember" abstract="true" name="CobusGreenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentAssetsLiabilitiesInventory" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentAssetsLiabilitiesInventory" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_CalienteSandsMember" abstract="true" name="CalienteSandsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RiverRidgeEstatesMember" abstract="true" name="RiverRidgeEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RiverPinesMember" abstract="true" name="RiverPinesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RanchoMirageMember" abstract="true" name="RanchoMirageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_GlenLaurelMember" abstract="true" name="GlenLaurelMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityOtherAdjustments" abstract="false" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityOtherAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_PolperroMember" abstract="true" name="PolperroMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RyeHarbourMember" abstract="true" name="RyeHarbourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CountryMeadowsMember" abstract="true" name="CountryMeadowsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RepaymentofNotesandOtherReceivables" abstract="false" name="RepaymentofNotesandOtherReceivables" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_BroadlandSandsMember" abstract="true" name="BroadlandSandsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HeritageMember" abstract="true" name="HeritageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RedeemableEquityInterestsMember" abstract="true" name="RedeemableEquityInterestsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborCharlestonCityMember" abstract="true" name="SafeHarborCharlestonCityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborJeffersonBeachMember" abstract="true" name="SafeHarborJeffersonBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HighPointMember" abstract="true" name="HighPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborCabrilloIsleMember" abstract="true" name="SafeHarborCabrilloIsleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AltaLagunaMember" abstract="true" name="AltaLagunaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsYellowstoneNorthMember" abstract="true" name="SunOutdoorsYellowstoneNorthMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_VestingTypeDomain" abstract="true" name="VestingTypeDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CedarSpringsMember" abstract="true" name="CedarSpringsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LincolnEstatesMember" abstract="true" name="LincolnEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AllenHarborMember" abstract="true" name="AllenHarborMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RiverBeachCampsitesAndRVMember" abstract="true" name="RiverBeachCampsitesAndRVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborGreenwichBayMember" abstract="true" name="SafeHarborGreenwichBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborPortPhoenixMember" abstract="true" name="SafeHarborPortPhoenixMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_IncomeTaxExpenseBenefitOtherStateTaxFlowThroughSubsidiaries" abstract="false" name="IncomeTaxExpenseBenefitOtherStateTaxFlowThroughSubsidiaries" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SunRetreatsGunLakeMember" abstract="true" name="SunRetreatsGunLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PaymentsForDistributionsOfIncomeFromNonconsolidatedEntities" abstract="false" name="PaymentsForDistributionsOfIncomeFromNonconsolidatedEntities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SafeHarborKingsPointMember" abstract="true" name="SafeHarborKingsPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MarketableSecuritiesMember" abstract="true" name="MarketableSecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborGlenCoveMember" abstract="true" name="SafeHarborGlenCoveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborLauderdaleMarineCenterMember" abstract="true" name="SafeHarborLauderdaleMarineCenterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NumberOfPropertiesSubjectToFinancialLiability" abstract="false" name="NumberOfPropertiesSubjectToFinancialLiability" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_NotesReceivableFromRealEstateDevelopersMember" abstract="true" name="NotesReceivableFromRealEstateDevelopersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LibertyFarmsMember" abstract="true" name="LibertyFarmsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LeisureVillageMember" abstract="true" name="LeisureVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsCanyonlandsGatewayMember" abstract="true" name="SunOutdoorsCanyonlandsGatewayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsSeashoreMember" abstract="true" name="SunRetreatsSeashoreMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BlueberryHillMember" abstract="true" name="BlueberryHillMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsOceanCityMember" abstract="true" name="SunOutdoorsOceanCityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PalmVillageMember" abstract="true" name="PalmVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_IncrementalCommonSharesAttributableToDilutiveEffectOfCommonEquity" abstract="false" name="IncrementalCommonSharesAttributableToDilutiveEffectOfCommonEquity" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="sui_OrdinaryDividendTaxablePercent" abstract="false" name="OrdinaryDividendTaxablePercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sui_FinancialLiabilityUndiscountedExcessAmount" abstract="false" name="FinancialLiabilityUndiscountedExcessAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_CedarHavenMember" abstract="true" name="CedarHavenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TheGroveatAltaRidgeMember" abstract="true" name="TheGroveatAltaRidgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_JellystoneParkAtHillCountryMember" abstract="true" name="JellystoneParkAtHillCountryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SVLiftLLCMember" abstract="true" name="SVLiftLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsStAugustineMember" abstract="true" name="SunOutdoorsStAugustineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WildwoodCommunityMember" abstract="true" name="WildwoodCommunityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeharborBluewaterMember" abstract="true" name="SafeharborBluewaterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WoodhavenPlaceMember" abstract="true" name="WoodhavenPlaceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SpanishMainMHRVResortMember" abstract="true" name="SpanishMainMHRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OperatingandFinanceLiability" abstract="false" name="OperatingandFinanceLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SunOutdoorsCapeMayMember" abstract="true" name="SunOutdoorsCapeMayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DispositionOfPropertiesMember" abstract="true" name="DispositionOfPropertiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_VistadelLagoMHRVResortMember" abstract="true" name="VistadelLagoMHRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_UnusualOrInfrequentItemNumberOfPropertiesAffectedByHurricane" abstract="false" name="UnusualOrInfrequentItemNumberOfPropertiesAffectedByHurricane" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_TaxCharacterizationOfDividendsPaidAxis" abstract="true" name="TaxCharacterizationOfDividendsPaidAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="sui_SandyBayMember" abstract="true" name="SandyBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FinancialInstrumentsSubjecttoMandatoryRedemptionRateOfReturn" abstract="false" name="FinancialInstrumentsSubjecttoMandatoryRedemptionRateOfReturn" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sui_ScheduleOfDeferredFinancingCostsDiscountsAndPremiumsTableTextBlock" abstract="false" name="ScheduleOfDeferredFinancingCostsDiscountsAndPremiumsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="sui_PresidentialEstatesMember" abstract="true" name="PresidentialEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FPGSunMorenoValley66Member" abstract="true" name="FPGSunMorenoValley66Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WestbrookSeniorVillageMember" abstract="true" name="WestbrookSeniorVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PineviewEstatesMember" abstract="true" name="PineviewEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TravelersWorldRVResortMember" abstract="true" name="TravelersWorldRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LaCasaBlancaMember" abstract="true" name="LaCasaBlancaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsCoosBayMember" abstract="true" name="SunOutdoorsCoosBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HaasLakeRVParkCampgroundMember" abstract="true" name="HaasLakeRVParkCampgroundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AllendaleMember" abstract="true" name="AllendaleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_StonebridgeSanAntonioTxMember" abstract="true" name="StonebridgeSanAntonioTxMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SecondTerminatedLeaseMember" abstract="true" name="SecondTerminatedLeaseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_KingsPointeMember" abstract="true" name="KingsPointeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SungeniaJVMember" abstract="true" name="SungeniaJVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsPasoRoblesMember" abstract="true" name="SunOutdoorsPasoRoblesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MHMember" abstract="true" name="MHMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_VariableInterestEntityEquityInterestsIssuedFloatingRate" abstract="false" name="VariableInterestEntityEquityInterestsIssuedFloatingRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sui_JellystoneParkAtTowerParkMember" abstract="true" name="JellystoneParkAtTowerParkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TheHamptonsGolfCountryClubMember" abstract="true" name="TheHamptonsGolfCountryClubMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MortgageMaturitiesMember" abstract="true" name="MortgageMaturitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_VariableInterestEntityEquityInterestsIssued" abstract="false" name="VariableInterestEntityEquityInterestsIssued" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_IncomelossAttributabletoCommonStockholdersAllocableToNonVestedRestrictedShares" abstract="false" name="IncomelossAttributabletoCommonStockholdersAllocableToNonVestedRestrictedShares" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SouthernLeisureResortMember" abstract="true" name="SouthernLeisureResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_KensingtonMeadowsMember" abstract="true" name="KensingtonMeadowsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ReceivableWithImputedInterestTerm" abstract="false" name="ReceivableWithImputedInterestTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="sui_AspenSeriesB3PreferredOperatingPartnershipOPUnitsMember" abstract="true" name="AspenSeriesB3PreferredOperatingPartnershipOPUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HamlinMember" abstract="true" name="HamlinMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BoulderRidgeMember" abstract="true" name="BoulderRidgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborHarborsViewMember" abstract="true" name="SafeHarborHarborsViewMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_VistadelLagoMember" abstract="true" name="VistadelLagoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LakefrontMember" abstract="true" name="LakefrontMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment" abstract="false" name="AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_NumberOfDevelopmentSites" abstract="false" name="NumberOfDevelopmentSites" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_ReleaseOfNoteReceivableAndAccruedInterest" abstract="false" name="ReleaseOfNoteReceivableAndAccruedInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_GulfstreamHarborMember" abstract="true" name="GulfstreamHarborMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RichmondMember" abstract="true" name="RichmondMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OrangeTreeMember" abstract="true" name="OrangeTreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BryntegMember" abstract="true" name="BryntegMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TwoThousandFifteenEquityPlanMember" abstract="true" name="TwoThousandFifteenEquityPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsKeyLargoMember" abstract="true" name="SunOutdoorsKeyLargoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LeafVerdeRVResortMember" abstract="true" name="LeafVerdeRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WindsorWoodsVillageMember" abstract="true" name="WindsorWoodsVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborAnacapaIsleMember" abstract="true" name="SafeHarborAnacapaIsleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsOldOrchardBeachDowntownMember" abstract="true" name="SunOutdoorsOldOrchardBeachDowntownMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborWickfordCoveMember" abstract="true" name="SafeHarborWickfordCoveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DeerfieldRunMember" abstract="true" name="DeerfieldRunMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FinancialLiabilityToBePaidAfterYearFive" abstract="false" name="FinancialLiabilityToBePaidAfterYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_TemporaryEquityConversationRatio" abstract="false" name="TemporaryEquityConversationRatio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="sui_ChisholmPointMember" abstract="true" name="ChisholmPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MarinaCoveMember" abstract="true" name="MarinaCoveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TarkaMember" abstract="true" name="TarkaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_VariableInterestEntityasaPercentageofConsolidatedAssets" abstract="false" name="VariableInterestEntityasaPercentageofConsolidatedAssets" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sui_SafeHarborBeaufortMember" abstract="true" name="SafeHarborBeaufortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MortgageTermLoans" abstract="false" name="MortgageTermLoans" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_TheSandsRVGolfCourseMember" abstract="true" name="TheSandsRVGolfCourseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BeaverBrookCampgroundMember" abstract="true" name="BeaverBrookCampgroundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BowlandFellMember" abstract="true" name="BowlandFellMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LakeviewMobileEstatesMember" abstract="true" name="LakeviewMobileEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WestVillageEstateMember" abstract="true" name="WestVillageEstateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborSkippersLandingMember" abstract="true" name="SafeHarborSkippersLandingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborIslandParkMember" abstract="true" name="SafeHarborIslandParkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborDauntlessMember" abstract="true" name="SafeHarborDauntlessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeriesDPreferredOPUnitsMember" abstract="true" name="SeriesDPreferredOPUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LafayettePlaceMember" abstract="true" name="LafayettePlaceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssetsLiabilities" abstract="false" name="AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssetsLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_PalosVerdesShoresMHGolfCommunityMember" abstract="true" name="PalosVerdesShoresMHGolfCommunityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BlueStarMember" abstract="true" name="BlueStarMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsRockRiverMember" abstract="true" name="SunRetreatsRockRiverMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DistributionsOfCapitalFromNonconsolidatedEntities" abstract="false" name="DistributionsOfCapitalFromNonconsolidatedEntities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SeriesFPreferredOPUnitsMember" abstract="true" name="SeriesFPreferredOPUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AuditInformationAbstract" abstract="true" name="AuditInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="sui_AspenPreferredOpUnitsMember" abstract="true" name="AspenPreferredOpUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborDeepRiverMember" abstract="true" name="SafeHarborDeepRiverMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WestsideRidgeMember" abstract="true" name="WestsideRidgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RanchAdjacentToCurrentPropertyMember" abstract="true" name="RanchAdjacentToCurrentPropertyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TemporaryEquityTerm" abstract="false" name="TemporaryEquityTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="sui_SafeHarborWillsboroBayMember" abstract="true" name="SafeHarborWillsboroBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DebtInstrumentConvertibleNumberOfEquityInstrumentsAffectedAndOutstanding" abstract="false" name="DebtInstrumentConvertibleNumberOfEquityInstrumentsAffectedAndOutstanding" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="sui_WatersEdgeRVResortMember" abstract="true" name="WatersEdgeRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HemlocksMember" abstract="true" name="HemlocksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsSanAntonioWestMember" abstract="true" name="SunOutdoorsSanAntonioWestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NumberofUnitsinRealEstatePropertyDevelopmentSites" abstract="false" name="NumberofUnitsinRealEstatePropertyDevelopmentSites" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_AllMarinaPropertiesExcludingMarinasHeadquartersAndOtherMember" abstract="true" name="AllMarinaPropertiesExcludingMarinasHeadquartersAndOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PleasantLakeRVResortMember" abstract="true" name="PleasantLakeRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WindhamHillsMember" abstract="true" name="WindhamHillsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunEnergyProjectLLCMember" abstract="true" name="SunEnergyProjectLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborPuertoDelReyMember" abstract="true" name="SafeHarborPuertoDelReyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CallalyLeisureMember" abstract="true" name="CallalyLeisureMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_UnitedKingdomHeadquartersMember" abstract="true" name="UnitedKingdomHeadquartersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DebtInstrumentConvertibleNumberOfEquityInstrumentsAffected" abstract="false" name="DebtInstrumentConvertibleNumberOfEquityInstrumentsAffected" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="sui_SafeHarborDetroitRiverMember" abstract="true" name="SafeHarborDetroitRiverMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BrooksideManorMember" abstract="true" name="BrooksideManorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborHaverstrawMember" abstract="true" name="SafeHarborHaverstrawMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RevenueFromHomeSales" abstract="false" name="RevenueFromHomeSales" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_JellystoneParkAtMarylandMember" abstract="true" name="JellystoneParkAtMarylandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_JellystoneParkAtGoldenValleyMember" abstract="true" name="JellystoneParkAtGoldenValleyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PropertiessecuringdebtMember" abstract="true" name="PropertiessecuringdebtMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PalmKeyVillageMember" abstract="true" name="PalmKeyVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_JellystoneParkAtNaturalBridgeMember" abstract="true" name="JellystoneParkAtNaturalBridgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TheValleyMember" abstract="true" name="TheValleyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CharlevoixEstatesMember" abstract="true" name="CharlevoixEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborWestPalmBeachMember" abstract="true" name="SafeHarborWestPalmBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RainbowrvMember" abstract="true" name="RainbowrvMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TallowwoodIsleMember" abstract="true" name="TallowwoodIsleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OrangeCityMHRVResortMember" abstract="true" name="OrangeCityMHRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborJamestownBoatyardMember" abstract="true" name="SafeHarborJamestownBoatyardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsRehobothBayMember" abstract="true" name="SunOutdoorsRehobothBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HuntersGlenMember" abstract="true" name="HuntersGlenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HurricaneIanMember" abstract="true" name="HurricaneIanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ShellCreekRVResortMarinaMember" abstract="true" name="ShellCreekRVResortMarinaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RainbowVillageofZepyrhillsMember" abstract="true" name="RainbowVillageofZepyrhillsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ShelterIslandMember" abstract="true" name="ShelterIslandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborBradyMountainMember" abstract="true" name="SafeHarborBradyMountainMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborEdgartownMember" abstract="true" name="SafeHarborEdgartownMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LakeJosephineRVResortMember" abstract="true" name="LakeJosephineRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NewRanchMember" abstract="true" name="NewRanchMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RVSegmentMember" abstract="true" name="RVSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BearLakeDevelopmentLandMember" abstract="true" name="BearLakeDevelopmentLandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PineAcreTrailsMember" abstract="true" name="PineAcreTrailsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BrooksideVillageKentwoodMiMember" abstract="true" name="BrooksideVillageKentwoodMiMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TheHillsMember" abstract="true" name="TheHillsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunriseEstatesMember" abstract="true" name="SunriseEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DebtInstrumentConvertiblePercentOfAmountByWhichTheMarketPriceOfCommonStockExceedsThreshold" abstract="false" name="DebtInstrumentConvertiblePercentOfAmountByWhichTheMarketPriceOfCommonStockExceedsThreshold" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sui_ShelbyWestMember" abstract="true" name="ShelbyWestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborEmeryvilleMember" abstract="true" name="SafeHarborEmeryvilleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AssetAcquisitionAndBusinessCombinationConsiderationTransferred" abstract="false" name="AssetAcquisitionAndBusinessCombinationConsiderationTransferred" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SouthBayMember" abstract="true" name="SouthBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborHarborHouseMember" abstract="true" name="SafeHarborHarborHouseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsCentralCoastWineCountryMember" abstract="true" name="SunOutdoorsCentralCoastWineCountryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborAnglerHouseMember" abstract="true" name="SafeHarborAnglerHouseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedInTwoYears" abstract="false" name="EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedInTwoYears" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_Issuanceofnotesandotherreceivables" abstract="false" name="Issuanceofnotesandotherreceivables" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_OperatingandFinanceLiabilityPaymentsDueAfterYearFive" abstract="false" name="OperatingandFinanceLiabilityPaymentsDueAfterYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SafeHarborAqualandMember" abstract="true" name="SafeHarborAqualandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ThemeworldRVResortMember" abstract="true" name="ThemeworldRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsOldOrchardBeachMember" abstract="true" name="SunRetreatsOldOrchardBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AppleCreekMember" abstract="true" name="AppleCreekMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FPGSunMenifee80LLCMember" abstract="true" name="FPGSunMenifee80LLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsSanDiegoBayMember" abstract="true" name="SunOutdoorsSanDiegoBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsSeaIsleMember" abstract="true" name="SunRetreatsSeaIsleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_GlendaleMember" abstract="true" name="GlendaleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AssetAcquisitionAndBusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment" abstract="false" name="AssetAcquisitionAndBusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SandhillsMember" abstract="true" name="SandhillsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OrdinaryIncomeMember" abstract="true" name="OrdinaryIncomeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CountrysideGwinnettMember" abstract="true" name="CountrysideGwinnettMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ContingentConsiderationEarnOutProvision" abstract="false" name="ContingentConsiderationEarnOutProvision" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_RollingHillsMember" abstract="true" name="RollingHillsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsLancasterCountyMember" abstract="true" name="SunRetreatsLancasterCountyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FinancialLiabilityToBePaidYearTwo" abstract="false" name="FinancialLiabilityToBePaidYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_InvestmentForeignCurrentTranslationAdjustment" abstract="false" name="InvestmentForeignCurrentTranslationAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_CountryVillageMember" abstract="true" name="CountryVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TreasuryLockAndInterestRateSwapMember" abstract="true" name="TreasuryLockAndInterestRateSwapMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OtherAssetsAndLiabilitiesMember" abstract="true" name="OtherAssetsAndLiabilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ConvertiblePreferredStockSharesIssuedPerShareUponConversion" abstract="false" name="ConvertiblePreferredStockSharesIssuedPerShareUponConversion" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="sui_FriendlyVillageofModestoMember" abstract="true" name="FriendlyVillageofModestoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MillwoodMember" abstract="true" name="MillwoodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OperatingandFinanceLeasesLiabilityPaymentsDueNextTwelveMonths" abstract="false" name="OperatingandFinanceLeasesLiabilityPaymentsDueNextTwelveMonths" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SunOutdoorsKensingtonValleyMember" abstract="true" name="SunOutdoorsKensingtonValleyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_GrandBayMember" abstract="true" name="GrandBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OperatingandFinancingPayments" abstract="false" name="OperatingandFinancingPayments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_FrenchtownVillaElizabethWoodsMember" abstract="true" name="FrenchtownVillaElizabethWoodsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborJamestownMember" abstract="true" name="SafeHarborJamestownMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsOrlandoChampionsGateMember" abstract="true" name="SunOutdoorsOrlandoChampionsGateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ClearWaterMobileMember" abstract="true" name="ClearWaterMobileMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BroadviewEstatesMember" abstract="true" name="BroadviewEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TroyVillaMember" abstract="true" name="TroyVillaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ReturnOfCapitalMember" abstract="true" name="ReturnOfCapitalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_JellystoneParkAtGuadalupeRiverMember" abstract="true" name="JellystoneParkAtGuadalupeRiverMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_InvestmentPropertyMember" abstract="true" name="InvestmentPropertyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsLongBeachIslandMember" abstract="true" name="SunRetreatsLongBeachIslandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RvCommunityMember" abstract="true" name="RvCommunityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborToledoBeachMember" abstract="true" name="SafeHarborToledoBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_VestingTypeAxis" abstract="true" name="VestingTypeAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="sui_ElCapitanCanyonMember" abstract="true" name="ElCapitanCanyonMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FriendlyVillageofLaHabraMember" abstract="true" name="FriendlyVillageofLaHabraMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DerivativeNumberOfInstrumentsSold" abstract="false" name="DerivativeNumberOfInstrumentsSold" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_TotalNotesAndOtherReceivablesMember" abstract="true" name="TotalNotesAndOtherReceivablesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AutumnRidgeMember" abstract="true" name="AutumnRidgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborSkullCreekMember" abstract="true" name="SafeHarborSkullCreekMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LeasesAdditionalInformationTableTextBlock" abstract="false" name="LeasesAdditionalInformationTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="sui_SunOutdoorsOceanCityGatewayMember" abstract="true" name="SunOutdoorsOceanCityGatewayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ClubWildwoodMember" abstract="true" name="ClubWildwoodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_EquityMethodInvestmentCumulativeTranslationAdjustment" abstract="false" name="EquityMethodInvestmentCumulativeTranslationAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_RVAndMarinaPropertiesMember" abstract="true" name="RVAndMarinaPropertiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RegencyHeightsMember" abstract="true" name="RegencyHeightsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ThemeworldRVMember" abstract="true" name="ThemeworldRVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AdvancedReservationDepositsAndRent" abstract="false" name="AdvancedReservationDepositsAndRent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SunOutdoorsChesapeakeBayMember" abstract="true" name="SunOutdoorsChesapeakeBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TransferToLevel3Member" abstract="true" name="TransferToLevel3Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ColonyInTheWoodMember" abstract="true" name="ColonyInTheWoodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MalvernViewMember" abstract="true" name="MalvernViewMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunVillaEstatesMember" abstract="true" name="SunVillaEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HarrisonYachtYardMember" abstract="true" name="HarrisonYachtYardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_GainLossOnRemeasurementOfNotesReceivable" abstract="false" name="GainLossOnRemeasurementOfNotesReceivable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SafeHarborNarrowsPointMember" abstract="true" name="SafeHarborNarrowsPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsLiabilitiesInventory" abstract="false" name="AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsLiabilitiesInventory" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_AssetAcquisitionAndBusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" abstract="false" name="AssetAcquisitionAndBusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_LakePointeVillageMember" abstract="true" name="LakePointeVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LemonWoodMember" abstract="true" name="LemonWoodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PermanentSpaceMember" abstract="true" name="PermanentSpaceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ScheduleOfNotesAndOtherReceivablesTableTextBlock" abstract="false" name="ScheduleOfNotesAndOtherReceivablesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="sui_HollyVillageHawaiianGardensMember" abstract="true" name="HollyVillageHawaiianGardensMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_IncomeLossAttributabletoTaxableSubsidiaries" abstract="false" name="IncomeLossAttributabletoTaxableSubsidiaries" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_ScheduleOfInstallmentNotesReceivableTable" abstract="true" name="ScheduleOfInstallmentNotesReceivableTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="sui_RiversideClubMember" abstract="true" name="RiversideClubMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SaralakeEstatesMember" abstract="true" name="SaralakeEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_Netincomeattributabletocommonshareholdersafterrestrictedstockallocation" abstract="false" name="Netincomeattributabletocommonshareholdersafterrestrictedstockallocation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SafeHarbourSportsmanMember" abstract="true" name="SafeHarbourSportsmanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_KitteryPointMember" abstract="true" name="KitteryPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FourSeasonsMember" abstract="true" name="FourSeasonsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SkylineMember" abstract="true" name="SkylineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AggregateValueOfSharesToBeIssuedPublicOffering" abstract="false" name="AggregateValueOfSharesToBeIssuedPublicOffering" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_KissimmeeGardensMember" abstract="true" name="KissimmeeGardensMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HospitalityCreekCampgroundMember" abstract="true" name="HospitalityCreekCampgroundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherLiabilities" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_FriendlyVillageofSimiMember" abstract="true" name="FriendlyVillageofSimiMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsPetoskeyBayHarborMember" abstract="true" name="SunOutdoorsPetoskeyBayHarborMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_StockIssuedDuringPeriodValueNewIssuesSeriesA4PreferredOPUnits" abstract="false" name="StockIssuedDuringPeriodValueNewIssuesSeriesA4PreferredOPUnits" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_GlenHavenRVResortMember" abstract="true" name="GlenHavenRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarbourStingrayPointMember" abstract="true" name="SafeHarbourStingrayPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FortDupontMember" abstract="true" name="FortDupontMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BrookRidgeMember" abstract="true" name="BrookRidgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborBurnsideMember" abstract="true" name="SafeHarborBurnsideMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationHoldback" abstract="false" name="NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationHoldback" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_LauderdaleMarineCenterMember" abstract="true" name="LauderdaleMarineCenterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LeaseSupplementalBalanceSheetInformationTableTextBlock" abstract="false" name="LeaseSupplementalBalanceSheetInformationTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="sui_SeniorUnsecuredNotesJanuary2033MaturityMember" abstract="true" name="SeniorUnsecuredNotesJanuary2033MaturityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OperatingLossCarryforwardsAfterTax" abstract="false" name="OperatingLossCarryforwardsAfterTax" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_StOsythBeachMember" abstract="true" name="StOsythBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborCityBoatyardMember" abstract="true" name="SafeHarborCityBoatyardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CountryHillsVillageMember" abstract="true" name="CountryHillsVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LittondaleMember" abstract="true" name="LittondaleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborBristolMember" abstract="true" name="SafeHarborBristolMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OperatingandFinanceLiabilityUndiscountedExcessAmount" abstract="false" name="OperatingandFinanceLiabilityUndiscountedExcessAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SafeHarborAnnapolisMember" abstract="true" name="SafeHarborAnnapolisMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HydeParkMember" abstract="true" name="HydeParkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OceanBreezeMHRVResortMember" abstract="true" name="OceanBreezeMHRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PearwoodRVResortMember" abstract="true" name="PearwoodRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DovercourtMember" abstract="true" name="DovercourtMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ConvertibleDebtAspenPreferredOpUnitsJanuary2024Member" abstract="true" name="ConvertibleDebtAspenPreferredOpUnitsJanuary2024Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PheasantRidgePropertyMember" abstract="true" name="PheasantRidgePropertyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborHollyCreekMember" abstract="true" name="SafeHarborHollyCreekMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AncillaryRevenuesMember" abstract="true" name="AncillaryRevenuesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ReinvestmentOfDividendsReceivedFromInvestmentNetOfTax" abstract="false" name="ReinvestmentOfDividendsReceivedFromInvestmentNetOfTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SunOutdoorsSantaBarbaraMember" abstract="true" name="SunOutdoorsSantaBarbaraMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WaldenWoodsIMember" abstract="true" name="WaldenWoodsIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TreetopsRVResortMember" abstract="true" name="TreetopsRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OtherCapitalizedCostsPolicyTextBlock" abstract="false" name="OtherCapitalizedCostsPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="sui_VallecitoMember" abstract="true" name="VallecitoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsCapeCodMember" abstract="true" name="SunRetreatsCapeCodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ParkPlaceMember" abstract="true" name="ParkPlaceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TermLoanMember" abstract="true" name="TermLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RealEstateInvestmentPropertyPolicyTextBlock" abstract="false" name="RealEstateInvestmentPropertyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="sui_PineHillsMember" abstract="true" name="PineHillsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ProceedsFromGainOnSettlementOfDerivativeInstrument" abstract="false" name="ProceedsFromGainOnSettlementOfDerivativeInstrument" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_KingsCourtMember" abstract="true" name="KingsCourtMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ThunderhillEstatesMember" abstract="true" name="ThunderhillEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeaviewMember" abstract="true" name="SeaviewMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NotesduefromRealEstateDevelopersMember" abstract="true" name="NotesduefromRealEstateDevelopersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CandlelightVillageMember" abstract="true" name="CandlelightVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsMysticMember" abstract="true" name="SunOutdoorsMysticMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AssetAcquisitionAndBusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFiniteLivedIntangibles" abstract="false" name="AssetAcquisitionAndBusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFiniteLivedIntangibles" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_CountrySquireMember" abstract="true" name="CountrySquireMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_KittatinnyCampgroundAndRVResortMember" abstract="true" name="KittatinnyCampgroundAndRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TranquilityMHCMember" abstract="true" name="TranquilityMHCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ARFacilityMember" abstract="true" name="ARFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborCowesettMember" abstract="true" name="SafeHarborCowesettMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedInNextTwelveMonths" abstract="false" name="EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedInNextTwelveMonths" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_OakviewEstatesMember" abstract="true" name="OakviewEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AssetAcquisitionAndBusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsLiabilitiesInventory" abstract="false" name="AssetAcquisitionAndBusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsLiabilitiesInventory" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_RedeemablePreferredOPUnitsMember" abstract="true" name="RedeemablePreferredOPUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OakRidgeMember" abstract="true" name="OakRidgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborSanduskyMember" abstract="true" name="SafeHarborSanduskyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsArranLakeMember" abstract="true" name="SunRetreatsArranLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BurgheadLossiemouthSilverSandsMember" abstract="true" name="BurgheadLossiemouthSilverSandsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BlueHeronPinesMember" abstract="true" name="BlueHeronPinesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BrokerageCommissionsAndOtherRevenuesNetMember" abstract="true" name="BrokerageCommissionsAndOtherRevenuesNetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TowerMarineMember" abstract="true" name="TowerMarineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BelAirEstatesSunriseEstatesMember" abstract="true" name="BelAirEstatesSunriseEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BusinessCombinationIncrementalContingentConsiderationExpense" abstract="false" name="BusinessCombinationIncrementalContingentConsiderationExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_RanchoAlipazMember" abstract="true" name="RanchoAlipazMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeniorUnsecuredNotesApril2032MaturityMember" abstract="true" name="SeniorUnsecuredNotesApril2032MaturityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_KnollwoodEstatesMember" abstract="true" name="KnollwoodEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SummitRidgeMember" abstract="true" name="SummitRidgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SuncoastGatewayMember" abstract="true" name="SuncoastGatewayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DuttonMillVillageMember" abstract="true" name="DuttonMillVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BeechwoodMember" abstract="true" name="BeechwoodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TemporaryEquityMember" abstract="true" name="TemporaryEquityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SaleOfStockNumberOfSharesIssuedInTransactionDirect" abstract="false" name="SaleOfStockNumberOfSharesIssuedInTransactionDirect" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="sui_SunRetreatsAtWildAcresMember" abstract="true" name="SunRetreatsAtWildAcresMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborSiestaKeyMember" abstract="true" name="SafeHarborSiestaKeyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsBirchBayMember" abstract="true" name="SunRetreatsBirchBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ChangeInDistributionsDeclaredAndOutstanding" abstract="false" name="ChangeInDistributionsDeclaredAndOutstanding" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SafeHarborFiddlersCoveMember" abstract="true" name="SafeHarborFiddlersCoveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FiestaVillageMember" abstract="true" name="FiestaVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborSouthBayMember" abstract="true" name="SafeHarborSouthBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_JarrettBayBluewaterYachtSalesMember" abstract="true" name="JarrettBayBluewaterYachtSalesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborPortRoyalLandingMember" abstract="true" name="SafeHarborPortRoyalLandingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NorthvilleCrossingMember" abstract="true" name="NorthvilleCrossingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_StoneridgeVillasMember" abstract="true" name="StoneridgeVillasMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ThreeLakesMember" abstract="true" name="ThreeLakesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MotorHomeCommunityRVResortAndMarinaMember" abstract="true" name="MotorHomeCommunityRVResortAndMarinaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CabrilloIsleMember" abstract="true" name="CabrilloIsleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WentworthByTheSeaMember" abstract="true" name="WentworthByTheSeaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LaCostaVillageMember" abstract="true" name="LaCostaVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_VinesRVResortMember" abstract="true" name="VinesRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborEmeraldPointMember" abstract="true" name="SafeHarborEmeraldPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ClubNaplesMember" abstract="true" name="ClubNaplesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DebtInstrumentNumberOfPropertiesSecuringDebtInstument" abstract="false" name="DebtInstrumentNumberOfPropertiesSecuringDebtInstument" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_RockyMountainRVParkMember" abstract="true" name="RockyMountainRVParkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DilutiveSecurityAxis" abstract="true" name="DilutiveSecurityAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="sui_BigTreeRVResortMember" abstract="true" name="BigTreeRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SiestaBayMember" abstract="true" name="SiestaBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PrimeMarthasVineyardMember" abstract="true" name="PrimeMarthasVineyardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RoyalCountryMember" abstract="true" name="RoyalCountryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OperatingExpensesAndCostOfSales" abstract="false" name="OperatingExpensesAndCostOfSales" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SouthernCharmRVResortMember" abstract="true" name="SouthernCharmRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_IndianWellsRVResortMember" abstract="true" name="IndianWellsRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborAndParkHolidaysMember" abstract="true" name="SafeHarborAndParkHolidaysMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsGardenCityUtahMember" abstract="true" name="SunOutdoorsGardenCityUtahMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsIpperwashMember" abstract="true" name="SunRetreatsIpperwashMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsPortlandSouthMember" abstract="true" name="SunOutdoorsPortlandSouthMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsSaltLakeCityMember" abstract="true" name="SunOutdoorsSaltLakeCityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RanchoCaballeroMember" abstract="true" name="RanchoCaballeroMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_IslamoradaAndAnglerHouseMember" abstract="true" name="IslamoradaAndAnglerHouseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsTexasHillCountryMember" abstract="true" name="SunOutdoorsTexasHillCountryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ParkHolidaysMember" abstract="true" name="ParkHolidaysMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DebrisRemovalRepairsAndFloodDamageMember" abstract="true" name="DebrisRemovalRepairsAndFloodDamageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WestwardShoresCottagesRVResortMember" abstract="true" name="WestwardShoresCottagesRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsArchesGatewayMember" abstract="true" name="SunOutdoorsArchesGatewayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsSherkstonShoresMember" abstract="true" name="SunRetreatsSherkstonShoresMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FelixstoweBeachMember" abstract="true" name="FelixstoweBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RoyalPalmsMHRVResortMember" abstract="true" name="RoyalPalmsMHRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TheHideawayMember" abstract="true" name="TheHideawayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_GrandMember" abstract="true" name="GrandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_Moreno66DevelopmentMember" abstract="true" name="Moreno66DevelopmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_GroveBeachMember" abstract="true" name="GroveBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_EastForkMember" abstract="true" name="EastForkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WeightedAverageCommonSharesOutstandingAdjustmentCommonShareFromForwardSale" abstract="false" name="WeightedAverageCommonSharesOutstandingAdjustmentCommonShareFromForwardSale" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="sui_TampaEastMHRVResortMember" abstract="true" name="TampaEastMHRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CutlerEstatesMember" abstract="true" name="CutlerEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LoanPrincipalAmortizationMember" abstract="true" name="LoanPrincipalAmortizationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborGreenportMember" abstract="true" name="SafeHarborGreenportMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PentireMember" abstract="true" name="PentireMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BodminHolidayParkMember" abstract="true" name="BodminHolidayParkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WoodlakeTrailsMember" abstract="true" name="WoodlakeTrailsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_GrovesRVResortMember" abstract="true" name="GrovesRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_JellystoneParkOfWesternNewYorkMember" abstract="true" name="JellystoneParkOfWesternNewYorkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsBlueMountainsMember" abstract="true" name="SunRetreatsBlueMountainsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RibbleValleyMember" abstract="true" name="RibbleValleyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_GroveRidgeRVResortMember" abstract="true" name="GroveRidgeRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FishermansCoveMember" abstract="true" name="FishermansCoveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BrentwoodWestMember" abstract="true" name="BrentwoodWestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_UnsecuredTermLoanFacilityMember" abstract="true" name="UnsecuredTermLoanFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MillCreekRVResortMember" abstract="true" name="MillCreekRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CountryLakesMember" abstract="true" name="CountryLakesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DisclosureOfVariableInterestEntitiesAbstract" abstract="true" name="DisclosureOfVariableInterestEntitiesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="sui_HuntersCrossingMember" abstract="true" name="HuntersCrossingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunsetRidgeKyleTxMember" abstract="true" name="SunsetRidgeKyleTxMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsCapeMayWildwoodMember" abstract="true" name="SunRetreatsCapeMayWildwoodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ArianaVillageMember" abstract="true" name="ArianaVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FondDuLacEastKettleMoraineKOAMember" abstract="true" name="FondDuLacEastKettleMoraineKOAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_StonebrookMember" abstract="true" name="StonebrookMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SpanishTrailsWestMember" abstract="true" name="SpanishTrailsWestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NaplesRVResortMember" abstract="true" name="NaplesRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LoneStarJellystoneParkMember" abstract="true" name="LoneStarJellystoneParkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NewEnglandVillageMember" abstract="true" name="NewEnglandVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FranchiseAgreementsAndOtherIntangibleAssetsMember" abstract="true" name="FranchiseAgreementsAndOtherIntangibleAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SouthsideLandingMember" abstract="true" name="SouthsideLandingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MaturesOctober12022389InterestRateMember" abstract="true" name="MaturesOctober12022389InterestRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunroadMarinaAndRestaurantMember" abstract="true" name="SunroadMarinaAndRestaurantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NumberOfProperties" abstract="false" name="NumberOfProperties" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_CarringtonPointeMember" abstract="true" name="CarringtonPointeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SaddleOakClubMember" abstract="true" name="SaddleOakClubMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NewBeachMember" abstract="true" name="NewBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeriesCpreferredOPunitsMember" abstract="true" name="SeriesCpreferredOPunitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HuntingtonRunMember" abstract="true" name="HuntingtonRunMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_A47NorthMember" abstract="true" name="A47NorthMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WaterOakCountryClubEstatesMember" abstract="true" name="WaterOakCountryClubEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RoyalPalmVillageMember" abstract="true" name="RoyalPalmVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OtherAdjustmentsMember" abstract="true" name="OtherAdjustmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RelatedPartyTransactionEquityInterestInOfficeSpacePercentage" abstract="false" name="RelatedPartyTransactionEquityInterestInOfficeSpacePercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="sui_OtherReceivablesForRentWaterSewerUsage" abstract="false" name="OtherReceivablesForRentWaterSewerUsage" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_CostMethodInvestmentPolicyMaximumPercentageOfOwnership" abstract="false" name="CostMethodInvestmentPolicyMaximumPercentageOfOwnership" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sui_WaverlyShoresVillageMember" abstract="true" name="WaverlyShoresVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CountryAcresMember" abstract="true" name="CountryAcresMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FinancialObligationFailedSaleLeasebackTransaction" abstract="false" name="FinancialObligationFailedSaleLeasebackTransaction" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SunsetHarboratCowKeyMarinaMember" abstract="true" name="SunsetHarboratCowKeyMarinaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborStratfordMember" abstract="true" name="SafeHarborStratfordMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_IncomeTaxExpenseBenefitTaxableSubsidiariesPercent" abstract="false" name="IncomeTaxExpenseBenefitTaxableSubsidiariesPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sui_HancockHeightsEstatesMember" abstract="true" name="HancockHeightsEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborCalusaIslandMember" abstract="true" name="SafeHarborCalusaIslandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TallPinesHarborCampgroundMember" abstract="true" name="TallPinesHarborCampgroundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MHAndRVPropertiesLocatedInTheUSMember" abstract="true" name="MHAndRVPropertiesLocatedInTheUSMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DeerwoodMember" abstract="true" name="DeerwoodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsAdirondackGatewayMember" abstract="true" name="SunRetreatsAdirondackGatewayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SolarEnergyProjectIIILLCMember" abstract="true" name="SolarEnergyProjectIIILLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_JellystoneParkAtGardinerMember" abstract="true" name="JellystoneParkAtGardinerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TrevellaMember" abstract="true" name="TrevellaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_GrossLossFromCatastrophesPriorToExpectedInsuranceRecoveries" abstract="false" name="GrossLossFromCatastrophesPriorToExpectedInsuranceRecoveries" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_HickoryHillsVillageMember" abstract="true" name="HickoryHillsVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborNewPortCoveMember" abstract="true" name="SafeHarborNewPortCoveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsDunedinMember" abstract="true" name="SunRetreatsDunedinMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HedleyWoodMember" abstract="true" name="HedleyWoodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NumberOfLandParcelsAcquired" abstract="false" name="NumberOfLandParcelsAcquired" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_EllentonGardensRVResortMember" abstract="true" name="EllentonGardensRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MarinasMember" abstract="true" name="MarinasMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BirchHillEstatesMember" abstract="true" name="BirchHillEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BlueJayMHRVResortMember" abstract="true" name="BlueJayMHRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LamplighterMember" abstract="true" name="LamplighterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NetEarningsLossMember" abstract="true" name="NetEarningsLossMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WinchelseaSandsMember" abstract="true" name="WinchelseaSandsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LakeshoreLandingsMember" abstract="true" name="LakeshoreLandingsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ForestSpringsMember" abstract="true" name="ForestSpringsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_UKMHOperatingCommunityMember" abstract="true" name="UKMHOperatingCommunityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_KingsLakeMember" abstract="true" name="KingsLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MeadowLakeEstatesMember" abstract="true" name="MeadowLakeEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ChulaVistaMember" abstract="true" name="ChulaVistaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_JellystoneLincolnMember" abstract="true" name="JellystoneLincolnMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MinimumPercentOfIncomeFromQualifyingSourcesToAllowForRealEstateInvestmentTrustClassification" abstract="false" name="MinimumPercentOfIncomeFromQualifyingSourcesToAllowForRealEstateInvestmentTrustClassification" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sui_ZemanPortfolioMember" abstract="true" name="ZemanPortfolioMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CountrysideLakeLanierMember" abstract="true" name="CountrysideLakeLanierMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MeadowstoneMember" abstract="true" name="MeadowstoneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsGeorgianBayMember" abstract="true" name="SunRetreatsGeorgianBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CoastalEstatesMember" abstract="true" name="CoastalEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsNewPointMember" abstract="true" name="SunRetreatsNewPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborGreatLakesMember" abstract="true" name="SafeHarborGreatLakesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_JellystoneParkAtQuarryvilleMember" abstract="true" name="JellystoneParkAtQuarryvilleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FinancialLiabilityToBePaidYearOne" abstract="false" name="FinancialLiabilityToBePaidYearOne" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_TotalEquityMember" abstract="true" name="TotalEquityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LakeJulianaLandingsMember" abstract="true" name="LakeJulianaLandingsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ChichesterLakesideMember" abstract="true" name="ChichesterLakesideMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_EmeraldCoastMember" abstract="true" name="EmeraldCoastMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborShelterIslandBoatyardMember" abstract="true" name="SafeHarborShelterIslandBoatyardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LakeSanMarinoRVParkMember" abstract="true" name="LakeSanMarinoRVParkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborTowerMarineMember" abstract="true" name="SafeHarborTowerMarineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CommonOpUnitsMember" abstract="true" name="CommonOpUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ByronCenterMember" abstract="true" name="ByronCenterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AssetAcquisitionConsiderationTransferredFinancialLiabilities" abstract="false" name="AssetAcquisitionConsiderationTransferredFinancialLiabilities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_FarHorizons49erVillageMember" abstract="true" name="FarHorizons49erVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SouthernHillsMember" abstract="true" name="SouthernHillsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WillowbrookMember" abstract="true" name="WillowbrookMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ScheduleOfTaxCharacterizationOfDividendsTableTextBlock" abstract="false" name="ScheduleOfTaxCharacterizationOfDividendsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="sui_MarketConditionMember" abstract="true" name="MarketConditionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborVineyardHavenMember" abstract="true" name="SafeHarborVineyardHavenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_EagleCrestMember" abstract="true" name="EagleCrestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TimberlineEstatesMember" abstract="true" name="TimberlineEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborSunsetBayMember" abstract="true" name="SafeHarborSunsetBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ParkHolidaysCashDepositMember" abstract="true" name="ParkHolidaysCashDepositMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ScheduleofFiniteLivedIntangibleAssetsAmortizationExpenseLineItems" abstract="true" name="ScheduleofFiniteLivedIntangibleAssetsAmortizationExpenseLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="sui_TheColonyMember" abstract="true" name="TheColonyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PodickoryPointMember" abstract="true" name="PodickoryPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TheVillasatCallaPointeMember" abstract="true" name="TheVillasatCallaPointeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MontaukYachtClubMember" abstract="true" name="MontaukYachtClubMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_IncomeLossFromContinuingOperationsBeforeOtherItemsAndTaxes" abstract="false" name="IncomeLossFromContinuingOperationsBeforeOtherItemsAndTaxes" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_CreekwoodMeadowsMember" abstract="true" name="CreekwoodMeadowsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MeadowlandsofGibraltarMember" abstract="true" name="MeadowlandsofGibraltarMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AncillaryRevenue" abstract="false" name="AncillaryRevenue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SouthforkMember" abstract="true" name="SouthforkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ScheduleOfOtherReceivablesTableTextBlock" abstract="false" name="ScheduleOfOtherReceivablesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="sui_NumberOfSitesThatSustainedSignificantDamage" abstract="false" name="NumberOfSitesThatSustainedSignificantDamage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_MenifeeDevelopmentMember" abstract="true" name="MenifeeDevelopmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PineTraceMember" abstract="true" name="PineTraceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WoodFarmMember" abstract="true" name="WoodFarmMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborNorthPalmBeachMember" abstract="true" name="SafeHarborNorthPalmBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ThreeGardensMember" abstract="true" name="ThreeGardensMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsPanamaCityBeachMember" abstract="true" name="SunOutdoorsPanamaCityBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PinOakMember" abstract="true" name="PinOakMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OceanPineMember" abstract="true" name="OceanPineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsNantahalaMember" abstract="true" name="SunRetreatsNantahalaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ManufacturedHomeCommunityMember" abstract="true" name="ManufacturedHomeCommunityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborCapeHarbourMember" abstract="true" name="SafeHarborCapeHarbourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AllUKPropertiesIncludingUKHeadquartersAndOthersMember" abstract="true" name="AllUKPropertiesIncludingUKHeadquartersAndOthersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsIslamoradaMember" abstract="true" name="SunOutdoorsIslamoradaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborCarrollIslandMember" abstract="true" name="SafeHarborCarrollIslandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborGreatOakLandingMember" abstract="true" name="SafeHarborGreatOakLandingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NoncashOrPartNoncashAcquisitionValueOfFinancialLiabilitiesAssumed" abstract="false" name="NoncashOrPartNoncashAcquisitionValueOfFinancialLiabilitiesAssumed" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_FourLeafPortfolioMember" abstract="true" name="FourLeafPortfolioMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborEssexIslandMember" abstract="true" name="SafeHarborEssexIslandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborOldPortCoveMember" abstract="true" name="SafeHarborOldPortCoveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OtherReceivablesNetMember" abstract="true" name="OtherReceivablesNetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_KeyEmployeesAndExecutiveOfficersMember" abstract="true" name="KeyEmployeesAndExecutiveOfficersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PercentOfTotalDividendsPaid" abstract="false" name="PercentOfTotalDividendsPaid" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sui_DeferredTaxAssetsRestrictedInterestCarryforward" abstract="false" name="DeferredTaxAssetsRestrictedInterestCarryforward" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SunOutdoorsNorthMoabMember" abstract="true" name="SunOutdoorsNorthMoabMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ScioFarmsMember" abstract="true" name="ScioFarmsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HighlandGreenEstatesMember" abstract="true" name="HighlandGreenEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_VariableInterestEntityasaPercentageofConsolidatedLiabilities" abstract="false" name="VariableInterestEntityasaPercentageofConsolidatedLiabilities" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sui_ForestHillMember" abstract="true" name="ForestHillMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SheffieldMember" abstract="true" name="SheffieldMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsHayBayMember" abstract="true" name="SunRetreatsHayBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PecanParkRVResortMember" abstract="true" name="PecanParkRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TheWillowsMember" abstract="true" name="TheWillowsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ArborTerraceMember" abstract="true" name="ArborTerraceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsLakeTravisMember" abstract="true" name="SunOutdoorsLakeTravisMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MaplewoodManorMember" abstract="true" name="MaplewoodManorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborSouthHarbourVillageMember" abstract="true" name="SafeHarborSouthHarbourVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsSarasotaMember" abstract="true" name="SunOutdoorsSarasotaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SolentBreezesMember" abstract="true" name="SolentBreezesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ParksideVillageMember" abstract="true" name="ParksideVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OysterBayMember" abstract="true" name="OysterBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ValueOfSharesSoldInForwardSaleTransactions" abstract="false" name="ValueOfSharesSoldInForwardSaleTransactions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_JellystoneParkAtWhisperingPinesMember" abstract="true" name="JellystoneParkAtWhisperingPinesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsCapeCharlesMember" abstract="true" name="SunOutdoorsCapeCharlesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LakelandRVResortMember" abstract="true" name="LakelandRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_IslandLakeMember" abstract="true" name="IslandLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RemeasurementOfNotesReceivableAndEquityMethodInvestments" abstract="false" name="RemeasurementOfNotesReceivableAndEquityMethodInvestments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SunRetreatsShenandoahValleyMember" abstract="true" name="SunRetreatsShenandoahValleyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeriesGPreferredOPUnitsMember" abstract="true" name="SeriesGPreferredOPUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_InvestmentPropertyNet" abstract="false" name="InvestmentPropertyNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_MaturesDecember1202243PercentInterestRateMember" abstract="true" name="MaturesDecember1202243PercentInterestRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PreferredreturntoSeriesA1preferredOPunits" abstract="false" name="PreferredreturntoSeriesA1preferredOPunits" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_VIEasaPercentageofTotalEquity" abstract="false" name="VIEasaPercentageofTotalEquity" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sui_OceanWestMember" abstract="true" name="OceanWestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ManufacturedHomeAndRvCommunityMember" abstract="true" name="ManufacturedHomeAndRvCommunityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MarlieMember" abstract="true" name="MarlieMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CollateralizedTermLoan1Member" abstract="true" name="CollateralizedTermLoan1Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_JellystoneParkAtBartonLakeMember" abstract="true" name="JellystoneParkAtBartonLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_IncomeFromRealPropertyMember" abstract="true" name="IncomeFromRealPropertyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ApponaugHarborMember" abstract="true" name="ApponaugHarborMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MarathonMarinaMember" abstract="true" name="MarathonMarinaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AvailableProceedsFromForwardSaleTransaction" abstract="false" name="AvailableProceedsFromForwardSaleTransaction" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SafeHarborSunroadMarinaRestaurantMember" abstract="true" name="SafeHarborSunroadMarinaRestaurantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsHuntsvilleMember" abstract="true" name="SunRetreatsHuntsvilleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RealEstateOtherAcquisitionsAndImprovements" abstract="false" name="RealEstateOtherAcquisitionsAndImprovements" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SmithCreekCrossingMember" abstract="true" name="SmithCreekCrossingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BuenaVistaMember" abstract="true" name="BuenaVistaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_JetstreamRVResortMember" abstract="true" name="JetstreamRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TemporaryEquityIssuancePrice" abstract="false" name="TemporaryEquityIssuancePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="sui_SafeHarborEagleCoveMember" abstract="true" name="SafeHarborEagleCoveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PreferredEquityMandatorilyRedeemableMember" abstract="true" name="PreferredEquityMandatorilyRedeemableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsOrangeBeachMember" abstract="true" name="SunOutdoorsOrangeBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborSakonnetMember" abstract="true" name="SafeHarborSakonnetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HollyForestMember" abstract="true" name="HollyForestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborCoveHavenMember" abstract="true" name="SafeHarborCoveHavenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CandlelightManorMember" abstract="true" name="CandlelightManorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_KingsManorMember" abstract="true" name="KingsManorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborMember" abstract="true" name="SafeHarborMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BluebonnetLakeMember" abstract="true" name="BluebonnetLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborPodickoryPointMember" abstract="true" name="SafeHarborPodickoryPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsAvalonMember" abstract="true" name="SunRetreatsAvalonMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HolidayWestVillageMember" abstract="true" name="HolidayWestVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LaurelHeightsMember" abstract="true" name="LaurelHeightsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborBayfrontMember" abstract="true" name="SafeHarborBayfrontMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OperatingandFinanceLiabilityPaymentsDue" abstract="false" name="OperatingandFinanceLiabilityPaymentsDue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_BeachwoodMember" abstract="true" name="BeachwoodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ComalFarmsMember" abstract="true" name="ComalFarmsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TransientRVsiteMember" abstract="true" name="TransientRVsiteMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NoncashOrPartNoncashAcquisitionValueOfDeferredTaxLiabilitiesAssumed" abstract="false" name="NoncashOrPartNoncashAcquisitionValueOfDeferredTaxLiabilitiesAssumed" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_NumberOfMHCommunities" abstract="false" name="NumberOfMHCommunities" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_SafeHarborPostRoadMember" abstract="true" name="SafeHarborPostRoadMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborRivieraBeachMember" abstract="true" name="SafeHarborRivieraBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RainbowVillageofLargoMember" abstract="true" name="RainbowVillageofLargoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TelephoneServiceMember" abstract="true" name="TelephoneServiceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunsetBeachRVResortMember" abstract="true" name="SunsetBeachRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsLiabilitiesGoodwillAndOtherIntangibleAssets" abstract="false" name="AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsLiabilitiesGoodwillAndOtherIntangibleAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_A2004NonemployeePlanMember" abstract="true" name="A2004NonemployeePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborReserveHarborMember" abstract="true" name="SafeHarborReserveHarborMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NumberOfShareBasedCompensationPlans" abstract="false" name="NumberOfShareBasedCompensationPlans" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_OakGroveMember" abstract="true" name="OakGroveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LineOfCreditFacilityAdditionalBorrowingCapacity" abstract="false" name="LineOfCreditFacilityAdditionalBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_NumberOfPropertiesSold" abstract="false" name="NumberOfPropertiesSold" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_ShareBasedPaymentArrangementRestrictedStockGrantsTableTextBlock" abstract="false" name="ShareBasedPaymentArrangementRestrictedStockGrantsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="sui_SettlersRestRVResortMember" abstract="true" name="SettlersRestRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LeisureSystemsIncMember" abstract="true" name="LeisureSystemsIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AppleCarrVillageMember" abstract="true" name="AppleCarrVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WoodsmokeCampingResportMember" abstract="true" name="WoodsmokeCampingResportMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_VerdePlazaMember" abstract="true" name="VerdePlazaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborShelburneShipyardMember" abstract="true" name="SafeHarborShelburneShipyardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_VariableInterestEntitiesConsolidatedTotalLiabilitiesAndStockholdersEquity" abstract="false" name="VariableInterestEntitiesConsolidatedTotalLiabilitiesAndStockholdersEquity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_JellystoneParkatLarkspurMember" abstract="true" name="JellystoneParkatLarkspurMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AllMarinaPropertiesIncludingMarinasHeadquartersAndOtherMember" abstract="true" name="AllMarinaPropertiesIncludingMarinasHeadquartersAndOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PaymentsForAssetAcquisitions" abstract="false" name="PaymentsForAssetAcquisitions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SunRetreatsWillowLakeMember" abstract="true" name="SunRetreatsWillowLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsAssociationIslandMember" abstract="true" name="SunOutdoorsAssociationIslandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MHPropertiesLocatedInTheUKMember" abstract="true" name="MHPropertiesLocatedInTheUKMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RealEstateAccumulatedDepreciationDispositionsAndOther" abstract="false" name="RealEstateAccumulatedDepreciationDispositionsAndOther" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_RudgatePropertiesMember" abstract="true" name="RudgatePropertiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsPenetanguisheneMember" abstract="true" name="SunRetreatsPenetanguisheneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RVMember" abstract="true" name="RVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ConversionofCommonOPUnitsMember" abstract="true" name="ConversionofCommonOPUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborMarinasMember" abstract="true" name="SafeHarborMarinasMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CiscoGroveCampResortMember" abstract="true" name="CiscoGroveCampResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WarrantsMember" abstract="true" name="WarrantsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeriesA3PreferredOpUnitsMember" abstract="true" name="SeriesA3PreferredOpUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborPier77Member" abstract="true" name="SafeHarborPier77Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsFrontierTownMember" abstract="true" name="SunOutdoorsFrontierTownMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PropertyOperatingAndMaintenance" abstract="false" name="PropertyOperatingAndMaintenance" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SafeHarborRocklandMember" abstract="true" name="SafeHarborRocklandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AllPropertiesExcludingCorporateHeadquartersMember" abstract="true" name="AllPropertiesExcludingCorporateHeadquartersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NGSunWhitewaterMember" abstract="true" name="NGSunWhitewaterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WeightedAverageCommonSharesOutstandingAbstract" abstract="true" name="WeightedAverageCommonSharesOutstandingAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="sui_NumberOfMarinasOwned" abstract="false" name="NumberOfMarinasOwned" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_HenfoldMember" abstract="true" name="HenfoldMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborSouthForkMember" abstract="true" name="SafeHarborSouthForkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LostDutchmanMember" abstract="true" name="LostDutchmanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SweetwaterRVResortMember" abstract="true" name="SweetwaterRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NewhavenMember" abstract="true" name="NewhavenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborBahiaBleuMember" abstract="true" name="SafeHarborBahiaBleuMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeriesJPreferredOpUnitsMember" abstract="true" name="SeriesJPreferredOpUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TaxCharacterizationOfDividendsPaidDomain" abstract="true" name="TaxCharacterizationOfDividendsPaidDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MeadowbrookEstatesMember" abstract="true" name="MeadowbrookEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SouthportSpringsMember" abstract="true" name="SouthportSpringsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeriesHPreferredOPUnitsMember" abstract="true" name="SeriesHPreferredOPUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsRockyMountainsMember" abstract="true" name="SunOutdoorsRockyMountainsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PevenseyBayMember" abstract="true" name="PevenseyBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PinebrookVillageMember" abstract="true" name="PinebrookVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsStratfordMember" abstract="true" name="SunRetreatsStratfordMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SwanMeadowMember" abstract="true" name="SwanMeadowMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OceanBreezeJensenBeachMember" abstract="true" name="OceanBreezeJensenBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CamelotVillaMember" abstract="true" name="CamelotVillaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BranchCreekMember" abstract="true" name="BranchCreekMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_VictorVillaMember" abstract="true" name="VictorVillaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborGainesMember" abstract="true" name="SafeHarborGainesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_GlenEllisFamilyCampgroundMember" abstract="true" name="GlenEllisFamilyCampgroundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AshbourneHeightsMember" abstract="true" name="AshbourneHeightsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WindmillVillageMember" abstract="true" name="WindmillVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NumberOfForwardSaleAgreements" abstract="false" name="NumberOfForwardSaleAgreements" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:positiveIntegerItemType"/>
  <xs:element id="sui_EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedInThreeYears" abstract="false" name="EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedInThreeYears" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_JellystoneParkAtBirchwoodAcresMHRVResortMember" abstract="true" name="JellystoneParkAtBirchwoodAcresMHRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PineRidgeMember" abstract="true" name="PineRidgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PleasantBeachCampgroundMember" abstract="true" name="PleasantBeachCampgroundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_InterestMember" abstract="true" name="InterestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DesertHarborMember" abstract="true" name="DesertHarborMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_GTSCMember" abstract="true" name="GTSCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TemporaryEquityDecreaseFromRedemptionsOrPurchaseOfInterests" abstract="false" name="TemporaryEquityDecreaseFromRedemptionsOrPurchaseOfInterests" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_DeferredTaxAssetsRealEstate" abstract="false" name="DeferredTaxAssetsRealEstate" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_TanglewoodVillageMember" abstract="true" name="TanglewoodVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborVenturaIsleMember" abstract="true" name="SafeHarborVenturaIsleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CapitalGainsMember" abstract="true" name="CapitalGainsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborHawthorneCoveMember" abstract="true" name="SafeHarborHawthorneCoveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AmbleLinksMember" abstract="true" name="AmbleLinksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BluewaterYachtSalesMember" abstract="true" name="BluewaterYachtSalesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsMoabDowntownMember" abstract="true" name="SunOutdoorsMoabDowntownMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsCayugaMember" abstract="true" name="SunRetreatsCayugaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FairfieldVillageMember" abstract="true" name="FairfieldVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsDaytonaBeachMember" abstract="true" name="SunRetreatsDaytonaBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_Settlementofmembershipinterest" abstract="false" name="Settlementofmembershipinterest" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_KimberlyEstatesMember" abstract="true" name="KimberlyEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CaveCreekMember" abstract="true" name="CaveCreekMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_JellystoneParkTMPetoskeyMember" abstract="true" name="JellystoneParkTMPetoskeyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OakCreekMember" abstract="true" name="OakCreekMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SouthwoodVillageMember" abstract="true" name="SouthwoodVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeriesIPreferredOPUnitsMember" abstract="true" name="SeriesIPreferredOPUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SignificantAccountingPoliciesLineItems" abstract="true" name="SignificantAccountingPoliciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="sui_FinancialInstrumentsSubjecttoMandatoryRedemptionValueofSharesIssued" abstract="false" name="FinancialInstrumentsSubjecttoMandatoryRedemptionValueofSharesIssued" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_AssetAcquisitionPaymentsToAcquireBusinessesGross" abstract="false" name="AssetAcquisitionPaymentsToAcquireBusinessesGross" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_BirchingtonValeMember" abstract="true" name="BirchingtonValeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_December2021SalesAgreementMember" abstract="true" name="December2021SalesAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BusinessCombinationApproximateConsiderationTransferredShares" abstract="false" name="BusinessCombinationApproximateConsiderationTransferredShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="sui_PaymentsOnFinancialLiabilityFailedSaleLeaseback" abstract="false" name="PaymentsOnFinancialLiabilityFailedSaleLeaseback" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_ForestMeadowsMember" abstract="true" name="ForestMeadowsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborRegattaPointeMember" abstract="true" name="SafeHarborRegattaPointeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TemporaryEquityDividendsForTermTwoPercentage" abstract="false" name="TemporaryEquityDividendsForTermTwoPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sui_DilutiveSecurityDomain" abstract="true" name="DilutiveSecurityDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HannahVillageMember" abstract="true" name="HannahVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsTurkeyPointMember" abstract="true" name="SunRetreatsTurkeyPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OrchardLakeMember" abstract="true" name="OrchardLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CarltonMeresMember" abstract="true" name="CarltonMeresMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SignificantAccountingPoliciesTable" abstract="true" name="SignificantAccountingPoliciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="sui_NumberOfTerminatedGroundLeases" abstract="false" name="NumberOfTerminatedGroundLeases" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_SunsetRidgePortlandMiMember" abstract="true" name="SunsetRidgePortlandMiMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MarinaBayYachtHarborMember" abstract="true" name="MarinaBayYachtHarborMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RudgateManorMember" abstract="true" name="RudgateManorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_YorkshireDalesMember" abstract="true" name="YorkshireDalesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OperatingandFinanceLiabilityPaymentsDueYearTwo" abstract="false" name="OperatingandFinanceLiabilityPaymentsDueYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SaddlebrookMember" abstract="true" name="SaddlebrookMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LeaseDescriptionDomain" abstract="true" name="LeaseDescriptionDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CountryMeadowsVillageMember" abstract="true" name="CountryMeadowsVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsAtPleasantAcresFarmMember" abstract="true" name="SunRetreatsAtPleasantAcresFarmMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborGriderHillMember" abstract="true" name="SafeHarborGriderHillMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HomosassaRiverRVResortMember" abstract="true" name="HomosassaRiverRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_UKNonOperatingPropertiesMember" abstract="true" name="UKNonOperatingPropertiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FlamingoLakeRVResortMember" abstract="true" name="FlamingoLakeRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LakeshoreVillasMember" abstract="true" name="LakeshoreVillasMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PledgedAssetsRealEstateNotSeparatelyReported" abstract="false" name="PledgedAssetsRealEstateNotSeparatelyReported" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_OtherDepreciationAndAccretion" abstract="false" name="OtherDepreciationAndAccretion" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_FinancingReceivablePeriodDrawn" abstract="false" name="FinancingReceivablePeriodDrawn" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="sui_PebbleCreekMember" abstract="true" name="PebbleCreekMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_IncomeTaxExpenseBenefitTaxableSubsidiariesAmount" abstract="false" name="IncomeTaxExpenseBenefitTaxableSubsidiariesAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_MeadowbrookMember" abstract="true" name="MeadowbrookMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborNewportShipyardMember" abstract="true" name="SafeHarborNewportShipyardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SouthernLeisureRVResortMember" abstract="true" name="SouthernLeisureRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_JarrettBayBoatworksMember" abstract="true" name="JarrettBayBoatworksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeniorUnsecuredNotesJuly2031Maturity2ndTrancheMember" abstract="true" name="SeniorUnsecuredNotesJuly2031Maturity2ndTrancheMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OtherReceivablesOther" abstract="false" name="OtherReceivablesOther" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_CountrysideAtlantaMember" abstract="true" name="CountrysideAtlantaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MountainViewMember" abstract="true" name="MountainViewMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborBallenaIsleMember" abstract="true" name="SafeHarborBallenaIsleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SalesAndSettlementsMember" abstract="true" name="SalesAndSettlementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TownCountryVillageMember" abstract="true" name="TownCountryVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SylvanGlenEstatesMember" abstract="true" name="SylvanGlenEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_StClairPlaceMember" abstract="true" name="StClairPlaceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationDeferredLiability" abstract="false" name="NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationDeferredLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_ScheduleofIntangibleAssetsAmortizationExpenseTableTextBlock" abstract="false" name="ScheduleofIntangibleAssetsAmortizationExpenseTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="sui_AirplaneUsageMember" abstract="true" name="AirplaneUsageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CiscoGroveCampgroundRVMember" abstract="true" name="CiscoGroveCampgroundRVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsGigHarborMember" abstract="true" name="SunOutdoorsGigHarborMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ShadowWoodVillageMember" abstract="true" name="ShadowWoodVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_GainLossOnRemeasurementOfInvestmentInNonconsolidatedEntities" abstract="false" name="GainLossOnRemeasurementOfInvestmentInNonconsolidatedEntities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_ScheduleofFiniteLivedIntangibleAssetsAmortizationExpenseTable" abstract="true" name="ScheduleofFiniteLivedIntangibleAssetsAmortizationExpenseTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="sui_LeaseFinancialLiabilityFutureMinimumRentalPaymentsFiscalYearMaturityTableTextBlock" abstract="false" name="LeaseFinancialLiabilityFutureMinimumRentalPaymentsFiscalYearMaturityTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="sui_SafeHarborTradeWindsMember" abstract="true" name="SafeHarborTradeWindsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PecanBranchMember" abstract="true" name="PecanBranchMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CherrywoodMember" abstract="true" name="CherrywoodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CabrilloIsleAndEmeraldCoastMember" abstract="true" name="CabrilloIsleAndEmeraldCoastMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_GainLossOnRemeasurementOfNoteReceivable" abstract="false" name="GainLossOnRemeasurementOfNoteReceivable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_ResidentBalancePastDuePeriod" abstract="false" name="ResidentBalancePastDuePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="sui_RoxburyMember" abstract="true" name="RoxburyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsPetersPondMember" abstract="true" name="SunRetreatsPetersPondMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_JellystoneParkAtMemphisMember" abstract="true" name="JellystoneParkAtMemphisMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DeferredTaxLiabilityBasisDifferenceDomesticAssets" abstract="false" name="DeferredTaxLiabilityBasisDifferenceDomesticAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SunRetreatsDennisPortMember" abstract="true" name="SunRetreatsDennisPortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_JellystoneParkAtLurayMember" abstract="true" name="JellystoneParkAtLurayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborPier121Member" abstract="true" name="SafeHarborPier121Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TheLandingsAtLakeHenryMember" abstract="true" name="TheLandingsAtLakeHenryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsFlamboroughMember" abstract="true" name="SunRetreatsFlamboroughMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunroadMarinaMember" abstract="true" name="SunroadMarinaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AugustaVillageMember" abstract="true" name="AugustaVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CapeMayCrossingMember" abstract="true" name="CapeMayCrossingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AspenSeriesB3PreferredOperatingPartnershipUnitsMember" abstract="true" name="AspenSeriesB3PreferredOperatingPartnershipUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SycamoreVillageMember" abstract="true" name="SycamoreVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MapleBrookMember" abstract="true" name="MapleBrookMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsBendMember" abstract="true" name="SunOutdoorsBendMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LazyLakesRVMember" abstract="true" name="LazyLakesRVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SerendipityMember" abstract="true" name="SerendipityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_InvestmentAdditionalPurchase" abstract="false" name="InvestmentAdditionalPurchase" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SafeHarborLochLomondMember" abstract="true" name="SafeHarborLochLomondMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HarborageYachtClubMember" abstract="true" name="HarborageYachtClubMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborNewEnglandBoatworksMember" abstract="true" name="SafeHarborNewEnglandBoatworksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NorthLakeEstatesMember" abstract="true" name="NorthLakeEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeniorUnsecuredNotesNovember2028MaturityMember" abstract="true" name="SeniorUnsecuredNotesNovember2028MaturityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WatersideMember" abstract="true" name="WatersideMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AndoverMember" abstract="true" name="AndoverMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TheFoothillsMember" abstract="true" name="TheFoothillsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborHideawayBayMember" abstract="true" name="SafeHarborHideawayBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_KeansMarinaMember" abstract="true" name="KeansMarinaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AssetAcquisitionAndBusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssetsOtherLiabilities" abstract="false" name="AssetAcquisitionAndBusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssetsOtherLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_AlpineMember" abstract="true" name="AlpineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NapaValleyMember" abstract="true" name="NapaValleyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborAquaYachtMember" abstract="true" name="SafeHarborAquaYachtMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborGreenHarborMember" abstract="true" name="SafeHarborGreenHarborMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BahiaVistaEstatesMember" abstract="true" name="BahiaVistaEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PaddockParkSouthMember" abstract="true" name="PaddockParkSouthMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PlasCochMember" abstract="true" name="PlasCochMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PrepaymentPenaltyDebt" abstract="false" name="PrepaymentPenaltyDebt" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_BeauportMember" abstract="true" name="BeauportMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ChangesInFairValueLevel3Axis" abstract="true" name="ChangesInFairValueLevel3Axis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="sui_EgelcraftMember" abstract="true" name="EgelcraftMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsSacoOldOrchardBeachMember" abstract="true" name="SunOutdoorsSacoOldOrchardBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OtherReceivablesStorageAndLeasePaymentsMarina" abstract="false" name="OtherReceivablesStorageAndLeasePaymentsMarina" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_OrdinaryTaxDividendPercentQualifiedDividend" abstract="false" name="OrdinaryTaxDividendPercentQualifiedDividend" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sui_OaklandsMember" abstract="true" name="OaklandsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PaymentsForAssetAcquisitionsAndToAcquireBusinessesGross" abstract="false" name="PaymentsForAssetAcquisitionsAndToAcquireBusinessesGross" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_NumberOfRVResorts" abstract="false" name="NumberOfRVResorts" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_SafeHarborZahnisersMember" abstract="true" name="SafeHarborZahnisersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AggregateValueofSharestobeIssuedinAccordancetoSalesAgreement" abstract="false" name="AggregateValueofSharestobeIssuedinAccordancetoSalesAgreement" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_ReserveatFoxCreekMember" abstract="true" name="ReserveatFoxCreekMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SouthernPalmsMember" abstract="true" name="SouthernPalmsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AustinLoanStarMember" abstract="true" name="AustinLoanStarMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NumberOfManagedProperties" abstract="false" name="NumberOfManagedProperties" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_JellystoneParkAtMammothCaveMember" abstract="true" name="JellystoneParkAtMammothCaveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PembrokeDownsMember" abstract="true" name="PembrokeDownsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ShadyRoadVillasMember" abstract="true" name="ShadyRoadVillasMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_StratfordLakeWinnipesaukeeSouthKOAMember" abstract="true" name="StratfordLakeWinnipesaukeeSouthKOAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CrestwoodMember" abstract="true" name="CrestwoodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MartelloBeachMember" abstract="true" name="MartelloBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborCrystalPointMember" abstract="true" name="SafeHarborCrystalPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
