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  <xs:element id="sui_OperatingAndFinanceLeasesLiabilityUndiscountedExcessAmount" abstract="false" name="OperatingAndFinanceLeasesLiabilityUndiscountedExcessAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_ChangeInEstimatedInsuranceRecoveries" abstract="false" name="ChangeInEstimatedInsuranceRecoveries" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_AspenPreferredOPUnitsNonExtendedMember" abstract="true" name="AspenPreferredOPUnitsNonExtendedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RealEstateOperatorMember" abstract="true" name="RealEstateOperatorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LeaseBalanceSheetInformationTableTextBlock" abstract="false" name="LeaseBalanceSheetInformationTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <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_SeriesJPreferredOpUnitsMember" abstract="true" name="SeriesJPreferredOpUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_BayfrontMarinaMember" abstract="true" name="BayfrontMarinaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_TwoThousandFifteenEquityPlanMember" abstract="true" name="TwoThousandFifteenEquityPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_NumberOfHousingSitesSold" abstract="false" name="NumberOfHousingSitesSold" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
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  <xs:element id="sui_LossonRemeasurementofInvestment" abstract="false" name="LossonRemeasurementofInvestment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_SeniorUnsecuredNotesJuly2031MaturityFirstTrancheMember" abstract="true" name="SeniorUnsecuredNotesJuly2031MaturityFirstTrancheMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_NumberofUnitsinRealEstatePropertyDevelopmentSites" abstract="false" name="NumberofUnitsinRealEstatePropertyDevelopmentSites" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
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</xs:schema>
