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  <xs:element id="sui_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentAssetsLiabilitiesInventory" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentAssetsLiabilitiesInventory" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <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_OperatingAndFinanceLeasesLiabilityPaymentDue" abstract="false" name="OperatingAndFinanceLeasesLiabilityPaymentDue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_CommonStockRestrictedStockAndCommonOPUnitsMember" abstract="true" name="CommonStockRestrictedStockAndCommonOPUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1: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_VariableInterestEntityEquityInterestsIssued" abstract="false" name="VariableInterestEntityEquityInterestsIssued" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_NumberOfShareBasedCompensationPlans" abstract="false" name="NumberOfShareBasedCompensationPlans" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_PreferredReturnToPreferredOPUnits" abstract="false" name="PreferredReturnToPreferredOPUnits" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_TemporaryEquityIssuancePrice" abstract="false" name="TemporaryEquityIssuancePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <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_TotalEquityMember" abstract="true" name="TotalEquityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_MHOperatingCommunityMember" abstract="true" name="MHOperatingCommunityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DebtInstrumentNumberOfPropertiesSecuringADebtInstrument" abstract="false" name="DebtInstrumentNumberOfPropertiesSecuringADebtInstrument" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="srt-types:perUnitItemType"/>
  <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_VariableInterestEntityEquityInterestsIssuedFloatingRate" abstract="false" name="VariableInterestEntityEquityInterestsIssuedFloatingRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <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_KeyEmployeesAndExecutiveOfficersMember" abstract="true" name="KeyEmployeesAndExecutiveOfficersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_MinimumPercentOfIncomeFromQualifyingSourcesToAllowForRealEstateInvestmentTrustClassification" abstract="false" name="MinimumPercentOfIncomeFromQualifyingSourcesToAllowForRealEstateInvestmentTrustClassification" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="sui_FinancingReceivablePeriodDrawn" abstract="false" name="FinancingReceivablePeriodDrawn" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <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_NewRanchMember" abstract="true" name="NewRanchMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1: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_AncillaryRevenue" abstract="false" name="AncillaryRevenue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_WarrantsMember" abstract="true" name="WarrantsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1: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_OperatingAndFinanceLeasesLiabilityPaymentsDueYearFour" abstract="false" name="OperatingAndFinanceLeasesLiabilityPaymentsDueYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_BlueWaterLoanMember" abstract="true" name="BlueWaterLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_RevolvingLoanMember" abstract="true" name="RevolvingLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_MarketableSecuritiesMember" abstract="true" name="MarketableSecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_NGSunLLCMember" abstract="true" name="NGSunLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunSolarJVMember" abstract="true" name="SunSolarJVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_CollateralizedTermLoan1Member" abstract="true" name="CollateralizedTermLoan1Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_MortgageTermLoansMaturingIn2030Through2033Member" abstract="true" name="MortgageTermLoansMaturingIn2030Through2033Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SpanishTrailsMHCMember" abstract="true" name="SpanishTrailsMHCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_DerivativeNumberOfInstrumentsEnteredInto" abstract="false" name="DerivativeNumberOfInstrumentsEnteredInto" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_DerivativeNumberOfInstrumentsSold" abstract="false" name="DerivativeNumberOfInstrumentsSold" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_CountrySquireMember" abstract="true" name="CountrySquireMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SeniorUnsecuredNotesMember" abstract="true" name="SeniorUnsecuredNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_KeyEmployeesMember" abstract="true" name="KeyEmployeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1: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_IncomeLossFromContinuingOperationsBeforeOtherItemsAndTaxes" abstract="false" name="IncomeLossFromContinuingOperationsBeforeOtherItemsAndTaxes" nillable="true" xbrli:periodType="duration" 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_OperatingAndFinanceLeasesLiabilityPaymentsRemainderofFiscalYear" abstract="false" name="OperatingAndFinanceLeasesLiabilityPaymentsRemainderofFiscalYear" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_December2021SalesAgreementMember" abstract="true" name="December2021SalesAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1: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_PineAcreTrailsMember" abstract="true" name="PineAcreTrailsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_MaturesOnOctober12022389InterestRateMember" abstract="true" name="MaturesOnOctober12022389InterestRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_OperatingAndFinanceLeasesLiabilityPaymentsDueYearThree" abstract="false" name="OperatingAndFinanceLeasesLiabilityPaymentsDueYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_NGSunWhitewaterMember" abstract="true" name="NGSunWhitewaterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SVLiftLLCMember" abstract="true" name="SVLiftLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_InstallmentNotesReceivableOnManufacturedHomesNetMember" abstract="true" name="InstallmentNotesReceivableOnManufacturedHomesNetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_ChangesInFairValueLevel3Domain" abstract="true" name="ChangesInFairValueLevel3Domain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SeriesEPreferredOPUnitsMember" abstract="true" name="SeriesEPreferredOPUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_NotesReceivableFromRealEstateDevelopersMember" abstract="true" name="NotesReceivableFromRealEstateDevelopersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_VestingTypeDomain" abstract="true" name="VestingTypeDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SeniorUnsecuredNotesJanuary2033MaturityMember" abstract="true" name="SeniorUnsecuredNotesJanuary2033MaturityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
</xs:schema>
