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  <xs:element id="sui_SecuredInstallmentNotesReceivableOnManufacturedHomesMember" abstract="true" name="SecuredInstallmentNotesReceivableOnManufacturedHomesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_KittatinnyCampgroundAndRVResortMember" abstract="true" name="KittatinnyCampgroundAndRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_MartelloBeachMember" abstract="true" name="MartelloBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_IncomeLossAttributabletoTaxableSubsidiaries" abstract="false" name="IncomeLossAttributabletoTaxableSubsidiaries" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_ValueOfSharesSoldInForwardSaleTransactions" abstract="false" name="ValueOfSharesSoldInForwardSaleTransactions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_TravelersWorldMember" abstract="true" name="TravelersWorldMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_NumberOfSharesSoldInvestment" abstract="false" name="NumberOfSharesSoldInvestment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_NumberOfDevelopmentSites" abstract="false" name="NumberOfDevelopmentSites" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
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  <xs:element id="sui_ClearWaterMobileMember" abstract="true" name="ClearWaterMobileMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_WarrenDunesVillageMember" abstract="true" name="WarrenDunesVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunRetreatsGunLakeMember" abstract="true" name="SunRetreatsGunLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_JellystoneParkAtNaturalBridgeMember" abstract="true" name="JellystoneParkAtNaturalBridgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_MaplewoodManorMember" abstract="true" name="MaplewoodManorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_FinancialLiabilityToBePaidYearThree" abstract="false" name="FinancialLiabilityToBePaidYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_OrdinaryIncomeMember" abstract="true" name="OrdinaryIncomeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_GrandBayMember" abstract="true" name="GrandBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunOutdoorsCentralCoastWineCountryMember" abstract="true" name="SunOutdoorsCentralCoastWineCountryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunNGResortsTransactionMember" abstract="true" name="SunNGResortsTransactionMember" 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-types1:domainItemType"/>
  <xs:element id="sui_ComalFarmsMember" abstract="true" name="ComalFarmsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_CarltonMeresMember" abstract="true" name="CarltonMeresMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_GlendaleMember" abstract="true" name="GlendaleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborPuertoDelReyMember" abstract="true" name="SafeHarborPuertoDelReyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunOutdoorsPanamaCityBeachMember" abstract="true" name="SunOutdoorsPanamaCityBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_CarriageCoveMember" abstract="true" name="CarriageCoveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunRetreatsOrlandoChampionsGateMember" abstract="true" name="SunRetreatsOrlandoChampionsGateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunRetreatsAmherstburgMember" abstract="true" name="SunRetreatsAmherstburgMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_NumberOfPropertiesSold" abstract="false" name="NumberOfPropertiesSold" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_FinancialInstrumentsSubjecttoMandatoryRedemptionRateOfReturn" abstract="false" name="FinancialInstrumentsSubjecttoMandatoryRedemptionRateOfReturn" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="sui_LesseeLiabilityToBePaidFiscalYearMaturityAbstract" abstract="true" name="LesseeLiabilityToBePaidFiscalYearMaturityAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="sui_NorthLakeMember" abstract="true" name="NorthLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1: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_BodminHolidayParkMember" abstract="true" name="BodminHolidayParkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunVillaEstatesMember" abstract="true" name="SunVillaEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_BrentwoodWestMember" abstract="true" name="BrentwoodWestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborGreenwichBayMember" abstract="true" name="SafeHarborGreenwichBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SouthsideLandingMember" abstract="true" name="SouthsideLandingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunOutdoorsMarathonMember" abstract="true" name="SunOutdoorsMarathonMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_BakerAcresMember" abstract="true" name="BakerAcresMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SkylineMember" abstract="true" name="SkylineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_LakeviewMember" abstract="true" name="LakeviewMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborBradyMountainMember" abstract="true" name="SafeHarborBradyMountainMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_HiddenRiverRVResortMember" abstract="true" name="HiddenRiverRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_April12030April12033Member" abstract="true" name="April12030April12033Member" 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-types1:domainItemType"/>
  <xs:element id="sui_ThemeworldMember" abstract="true" name="ThemeworldMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_HuntingtonRunMember" abstract="true" name="HuntingtonRunMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborBristolMember" abstract="true" name="SafeHarborBristolMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_RiversideClubMember" abstract="true" name="RiversideClubMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_HighPointMember" abstract="true" name="HighPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_OuterBanksMember" abstract="true" name="OuterBanksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1: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_TransientRVsiteMember" abstract="true" name="TransientRVsiteMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_ParkPlaceMember" abstract="true" name="ParkPlaceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborNewPortCoveMember" abstract="true" name="SafeHarborNewPortCoveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_WindmillVillageMember" abstract="true" name="WindmillVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_SafeHarborStratfordMember" abstract="true" name="SafeHarborStratfordMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_GroveBeachMember" abstract="true" name="GroveBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_FloridaAndArizonaMember" abstract="true" name="FloridaAndArizonaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <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_VariableInterestEntityEquityInterestsIssued" abstract="false" name="VariableInterestEntityEquityInterestsIssued" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <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_PalmKeyVillageMember" abstract="true" name="PalmKeyVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunEnergyProjectLLCMember" abstract="true" name="SunEnergyProjectLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_TheHamptonsGolfCountryClubMember" abstract="true" name="TheHamptonsGolfCountryClubMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborEmeraldPointMember" abstract="true" name="SafeHarborEmeraldPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <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_SylvanCrossingMember" abstract="true" name="SylvanCrossingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborHawthorneCoveMember" abstract="true" name="SafeHarborHawthorneCoveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborReserveHarborMember" abstract="true" name="SafeHarborReserveHarborMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_LeasesAdditionalInformationTableTextBlock" abstract="false" name="LeasesAdditionalInformationTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="sui_SunRetreatsCapeCodMember" abstract="true" name="SunRetreatsCapeCodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_CapeMayCrossingMember" abstract="true" name="CapeMayCrossingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_CrossroadsMember" abstract="true" name="CrossroadsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_WoodFarmMember" abstract="true" name="WoodFarmMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborDauntlessMember" abstract="true" name="SafeHarborDauntlessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_AnnualRvSitesMember" abstract="true" name="AnnualRvSitesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_LantanaRanchMember" abstract="true" name="LantanaRanchMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ReserveatFoxCreekMember" abstract="true" name="ReserveatFoxCreekMember" 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_CitrusHillRVResortMember" abstract="true" name="CitrusHillRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_CiscoGroveCampgroundRVMember" abstract="true" name="CiscoGroveCampgroundRVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_FriendlyVillageofLaHabraMember" abstract="true" name="FriendlyVillageofLaHabraMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunRetreatsDennisPortMember" abstract="true" name="SunRetreatsDennisPortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_WaldenWoodsIIMember" abstract="true" name="WaldenWoodsIIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_ScheduleOfNotesAndOtherReceivablesTableTextBlock" abstract="false" name="ScheduleOfNotesAndOtherReceivablesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="sui_WillowbrookMember" abstract="true" name="WillowbrookMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborJamestownMember" abstract="true" name="SafeHarborJamestownMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_MalvernViewMember" abstract="true" name="MalvernViewMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborPlymouthMember" abstract="true" name="SafeHarborPlymouthMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1: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_OakGroveMember" abstract="true" name="OakGroveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_AccumulatedDistributionsInExcessOfNetIncomeAdjustmentForAccretionOfTemporaryEquity" abstract="false" name="AccumulatedDistributionsInExcessOfNetIncomeAdjustmentForAccretionOfTemporaryEquity" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <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_IncomeTaxExpenseBenefitTaxableSubsidiariesAmount" abstract="false" name="IncomeTaxExpenseBenefitTaxableSubsidiariesAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_HillcrestMember" abstract="true" name="HillcrestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_RentalpropertiesMember" abstract="true" name="RentalpropertiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_StockIssuedDuringPeriodValueNewIssuesCommonStockAndPreferredOPUnits" abstract="false" name="StockIssuedDuringPeriodValueNewIssuesCommonStockAndPreferredOPUnits" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_NetEarningsLossMember" abstract="true" name="NetEarningsLossMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborHollyCreekMember" abstract="true" name="SafeHarborHollyCreekMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SummitRidgeMember" abstract="true" name="SummitRidgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_MarketConditionMember" abstract="true" name="MarketConditionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SaddleOakClubMember" abstract="true" name="SaddleOakClubMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SolarEnergyProjectIIILLCMember" abstract="true" name="SolarEnergyProjectIIILLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SavannaClubMember" abstract="true" name="SavannaClubMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_DovercourtMember" abstract="true" name="DovercourtMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1: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_NoncontrollingInterestsTableTextBlock" abstract="false" name="NoncontrollingInterestsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="sui_PaymentsForCapitalImprovementsAndDevelopmentsOfRealEstate" abstract="false" name="PaymentsForCapitalImprovementsAndDevelopmentsOfRealEstate" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesNet" abstract="false" name="TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesNet" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_LoneStarJellystoneParkMember" abstract="true" name="LoneStarJellystoneParkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <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_ContingentConsiderationEarnOutProvision" abstract="false" name="ContingentConsiderationEarnOutProvision" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <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_SunRetreatsCayugaMember" abstract="true" name="SunRetreatsCayugaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1: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_HollyForestMember" abstract="true" name="HollyForestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborCityBoatyardMember" abstract="true" name="SafeHarborCityBoatyardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_AustinLoanStarMember" abstract="true" name="AustinLoanStarMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_PineviewEstatesMember" abstract="true" name="PineviewEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_CallalyLeisureMember" abstract="true" name="CallalyLeisureMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_NumberOfForwardSaleAgreements" abstract="false" name="NumberOfForwardSaleAgreements" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:positiveIntegerItemType"/>
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  <xs:element id="sui_ArborTerraceMember" abstract="true" name="ArborTerraceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_DisposalGroupIncludingDiscontinuedOperationConsiderationInFormOfNoteReceivable" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationConsiderationInFormOfNoteReceivable" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_SeriesKPreferredOPUnitsMember" abstract="true" name="SeriesKPreferredOPUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ChisholmPointMember" abstract="true" name="ChisholmPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_WaterOakCountryClubEstatesMember" abstract="true" name="WaterOakCountryClubEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_GoldenSandsMember" abstract="true" name="GoldenSandsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_WatersEdgeMember" abstract="true" name="WatersEdgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_FinancingReceivableBeforeAllowanceForCreditLossNetOfFairValueAdjustment" abstract="false" name="FinancingReceivableBeforeAllowanceForCreditLossNetOfFairValueAdjustment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_NumberOfShareBasedCompensationPlans" abstract="false" name="NumberOfShareBasedCompensationPlans" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <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_WymberlyMember" abstract="true" name="WymberlyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_TelephoneServiceMember" abstract="true" name="TelephoneServiceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborBahiaBleuMember" abstract="true" name="SafeHarborBahiaBleuMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_NumberOfAdditionalDefendants" abstract="false" name="NumberOfAdditionalDefendants" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_BranchCreekMember" abstract="true" name="BranchCreekMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_TheColonyMember" abstract="true" name="TheColonyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_LeafVerdeMember" abstract="true" name="LeafVerdeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_FranchiseAgreementsAndOtherIntangibleAssetsMember" abstract="true" name="FranchiseAgreementsAndOtherIntangibleAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunNGResortsTransactionAndSunNGBeaverBrookLLCMember" abstract="true" name="SunNGResortsTransactionAndSunNGBeaverBrookLLCMember" 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-types1:domainItemType"/>
  <xs:element id="sui_SilverSpringsMember" abstract="true" name="SilverSpringsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_BlueberryHillMember" abstract="true" name="BlueberryHillMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_August1020472Member" abstract="true" name="August1020472Member" 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-types1:domainItemType"/>
  <xs:element id="sui_BryntegMember" abstract="true" name="BryntegMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_ArianaVillageMember" abstract="true" name="ArianaVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_OperatingandFinanceLeasesLiabilityPaymentsDueNextTwelveMonths" abstract="false" name="OperatingandFinanceLeasesLiabilityPaymentsDueNextTwelveMonths" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <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_NotesDueFromOtherRealEstateDevelopersMember" abstract="true" name="NotesDueFromOtherRealEstateDevelopersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ShareBasedPaymentArrangementRestrictedStockGrantsTableTextBlock" abstract="false" name="ShareBasedPaymentArrangementRestrictedStockGrantsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="sui_UnusualOrInfrequentItemNumberOfPropertiesAffectedByNaturalDisasters" abstract="false" name="UnusualOrInfrequentItemNumberOfPropertiesAffectedByNaturalDisasters" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_CabrilloIsleAndEmeraldCoastMember" abstract="true" name="CabrilloIsleAndEmeraldCoastMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityOtherAdjustments" abstract="false" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityOtherAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_VistadelLagoMember" abstract="true" name="VistadelLagoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_NewBeachMember" abstract="true" name="NewBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_TallowwoodIsleMember" abstract="true" name="TallowwoodIsleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_PaddockParkSouthMember" abstract="true" name="PaddockParkSouthMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_SafeHarborPeninsulaYachtClubMember" abstract="true" name="SafeHarborPeninsulaYachtClubMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_CountryMeadowsVillageMember" abstract="true" name="CountryMeadowsVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_PevenseyBayMember" abstract="true" name="PevenseyBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborPier121Member" abstract="true" name="SafeHarborPier121Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunOutdoorsYellowstoneNorthMember" abstract="true" name="SunOutdoorsYellowstoneNorthMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_IndianWellsRVResortMember" abstract="true" name="IndianWellsRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_EastForkMember" abstract="true" name="EastForkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborGreatLakesMember" abstract="true" name="SafeHarborGreatLakesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_IndianCreekParkMember" abstract="true" name="IndianCreekParkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborCarrollIslandMember" abstract="true" name="SafeHarborCarrollIslandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_WaldenWoodsIMember" abstract="true" name="WaldenWoodsIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_LakeJulianaLandingsMember" abstract="true" name="LakeJulianaLandingsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_LaCostaVillageMember" abstract="true" name="LaCostaVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunRetreatsNewPointMember" abstract="true" name="SunRetreatsNewPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborBeaufortMember" abstract="true" name="SafeHarborBeaufortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_HydeParkMember" abstract="true" name="HydeParkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborAndParkHolidaysMember" abstract="true" name="SafeHarborAndParkHolidaysMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_OakRidgeMember" abstract="true" name="OakRidgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_ClubWildwoodMember" abstract="true" name="ClubWildwoodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_MotorHomeCommunityRVResortAndMarinaMember" abstract="true" name="MotorHomeCommunityRVResortAndMarinaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_LemonWoodMember" abstract="true" name="LemonWoodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1: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_LaurelHeightsMember" abstract="true" name="LaurelHeightsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_JetstreamNASAMember" abstract="true" name="JetstreamNASAMember" 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_VizcayaLakesMember" abstract="true" name="VizcayaLakesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_NumberOfConsolidatedJointVentureProperties" abstract="false" name="NumberOfConsolidatedJointVentureProperties" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_SylvanGlenEstatesMember" abstract="true" name="SylvanGlenEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_BroadviewEstatesMember" abstract="true" name="BroadviewEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1: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_SunRetreatsArranLakeMember" abstract="true" name="SunRetreatsArranLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborOnsetBayMember" abstract="true" name="SafeHarborOnsetBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_ContingentConsiderationLiabilityMember" abstract="true" name="ContingentConsiderationLiabilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborWentworthByTheSeaMember" abstract="true" name="SafeHarborWentworthByTheSeaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_CountryHillsVillageMember" abstract="true" name="CountryHillsVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1: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_LineOfCreditNumberOfOptionsToExtendMaturityDate" abstract="false" name="LineOfCreditNumberOfOptionsToExtendMaturityDate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_CommonOpUnitsMember" abstract="true" name="CommonOpUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborGrandIsleMember" abstract="true" name="SafeHarborGrandIsleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_TemporaryEquityPercentageOfConversationPriceThresholdForExchange" abstract="false" name="TemporaryEquityPercentageOfConversationPriceThresholdForExchange" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="sui_BroadlandSandsMember" abstract="true" name="BroadlandSandsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_AugustaVillageMember" abstract="true" name="AugustaVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_JellystoneParkOfChicagoMember" abstract="true" name="JellystoneParkOfChicagoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_OakIslandVillageMember" abstract="true" name="OakIslandVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_SunOutdoorsIslamoradaMember" abstract="true" name="SunOutdoorsIslamoradaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1: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_UKMHOperatingCommunityMember" abstract="true" name="UKMHOperatingCommunityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_UnitedKingdomHeadquartersMember" abstract="true" name="UnitedKingdomHeadquartersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_MHAndRVPropertiesLocatedInTheUSMember" abstract="true" name="MHAndRVPropertiesLocatedInTheUSMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_RoxburyMember" abstract="true" name="RoxburyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_PentireMember" abstract="true" name="PentireMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <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_SafeHarborSkullCreekMember" abstract="true" name="SafeHarborSkullCreekMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_FPGSunMenifee80LLCMember" abstract="true" name="FPGSunMenifee80LLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_ScheduleOfChangesInEstimatedInsuranceRecoveriesRollForward" abstract="true" name="ScheduleOfChangesInEstimatedInsuranceRecoveriesRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="sui_SunRetreatsShenandoahValleyMember" abstract="true" name="SunRetreatsShenandoahValleyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_FlamingoLakeRVResortMember" abstract="true" name="FlamingoLakeRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_RezPlotMember" abstract="true" name="RezPlotMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunRetreatsSanAntonioWestMember" abstract="true" name="SunRetreatsSanAntonioWestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_RudgatePropertiesMember" abstract="true" name="RudgatePropertiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_NoncontrollingInterestIssuanceOfStockFromSubsidiaryEquityIssuanceShares" abstract="false" name="NoncontrollingInterestIssuanceOfStockFromSubsidiaryEquityIssuanceShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="sui_SunRetreatsTexasHillCountryMember" abstract="true" name="SunRetreatsTexasHillCountryMember" 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_SandhillsMember" abstract="true" name="SandhillsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_AllPropertiesExcludingCorporateHeadquartersMember" abstract="true" name="AllPropertiesExcludingCorporateHeadquartersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_TheWillowsMember" abstract="true" name="TheWillowsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_LeaseFinancialLiabilityFutureMinimumRentalPaymentsFiscalYearMaturityTableTextBlock" abstract="false" name="LeaseFinancialLiabilityFutureMinimumRentalPaymentsFiscalYearMaturityTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="sui_DeerwoodMember" abstract="true" name="DeerwoodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborPier77Member" abstract="true" name="SafeHarborPier77Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_AppleCarrVillageMember" abstract="true" name="AppleCarrVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_MeadowbrookVillageMember" abstract="true" name="MeadowbrookVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborDetroitRiverMember" abstract="true" name="SafeHarborDetroitRiverMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_OysterBayMember" abstract="true" name="OysterBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_ChichesterLakesideMember" abstract="true" name="ChichesterLakesideMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_DisposalGroupIncludingDiscontinuedOperationFairValueRemeasurementAdjustment" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationFairValueRemeasurementAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_MarlieMember" abstract="true" name="MarlieMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborEssexIslandMember" abstract="true" name="SafeHarborEssexIslandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_NGSunTRSBeaverBrookLLCMember" abstract="true" name="NGSunTRSBeaverBrookLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunOutdoorsWellsBeachMember" abstract="true" name="SunOutdoorsWellsBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AllMarinaPropertiesExcludingMarinasHeadquartersAndOtherMember" abstract="true" name="AllMarinaPropertiesExcludingMarinasHeadquartersAndOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_ScheduleOfChangesInInvestmentBalanceRollForward" abstract="true" name="ScheduleOfChangesInInvestmentBalanceRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="sui_ArborWoodsMember" abstract="true" name="ArborWoodsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborHaverstrawMember" abstract="true" name="SafeHarborHaverstrawMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarbourSportsmanMember" abstract="true" name="SafeHarbourSportsmanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_November12030Member" abstract="true" name="November12030Member" 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-types1:domainItemType"/>
  <xs:element id="sui_AllUKPropertiesIncludingUKHeadquartersAndOthersMember" abstract="true" name="AllUKPropertiesIncludingUKHeadquartersAndOthersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_ComponentsOfIncomeLossAttributableToTaxableSubsidiariesTableTextBlock" abstract="false" name="ComponentsOfIncomeLossAttributableToTaxableSubsidiariesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
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  <xs:element id="sui_SunOutdoorsOceanCityMember" abstract="true" name="SunOutdoorsOceanCityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1: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_SunRetreatsLancasterCountyMember" abstract="true" name="SunRetreatsLancasterCountyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_TreasuryLockAndInterestRateSwapMember" abstract="true" name="TreasuryLockAndInterestRateSwapMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <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_SeriesJPreferredOPUnitsMember" abstract="true" name="SeriesJPreferredOPUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_RealEstateReacquiredNoteReceivableSettlementValue" abstract="false" name="RealEstateReacquiredNoteReceivableSettlementValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_SafeHarborAnacapaIsleMember" abstract="true" name="SafeHarborAnacapaIsleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_PembrokeDownsMember" abstract="true" name="PembrokeDownsMember" 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_SalesAndSettlementsMember" abstract="true" name="SalesAndSettlementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunRetreatsAdirondackGatewayMember" abstract="true" name="SunRetreatsAdirondackGatewayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunRetreatsNantahalaMember" abstract="true" name="SunRetreatsNantahalaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborMarinasMember" abstract="true" name="SafeHarborMarinasMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_WoodsideTerraceMember" abstract="true" name="WoodsideTerraceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_NumberOfPropertiesAcquiredWithMajorityInterest" abstract="false" name="NumberOfPropertiesAcquiredWithMajorityInterest" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_BusinessInterruptionInsurancePeriodOfCoverage" abstract="false" name="BusinessInterruptionInsurancePeriodOfCoverage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="sui_SafeHarborLauderdaleMarineCenterMember" abstract="true" name="SafeHarborLauderdaleMarineCenterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_CarringtonPointeMember" abstract="true" name="CarringtonPointeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_BurgheadLossiemouthSilverSandsMember" abstract="true" name="BurgheadLossiemouthSilverSandsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_JellystoneParkAtMarylandMember" abstract="true" name="JellystoneParkAtMarylandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <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_CobusGreenMember" abstract="true" name="CobusGreenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunOutdoorsOceanCityGatewayMember" abstract="true" name="SunOutdoorsOceanCityGatewayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborOuterBanksMember" abstract="true" name="SafeHarborOuterBanksMember" 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_RainbowMember" abstract="true" name="RainbowMember" 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_BigTreeRVResortMember" abstract="true" name="BigTreeRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunRetreatsWillowLakeMember" abstract="true" name="SunRetreatsWillowLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_RoyaleHoldingsGroupHoldCoLimitedMember" abstract="true" name="RoyaleHoldingsGroupHoldCoLimitedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DisposalGroupIncludingDiscontinuedOperationCashConsideration" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationCashConsideration" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_BirchHillEstatesMember" abstract="true" name="BirchHillEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1: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_EagleCrestMember" abstract="true" name="EagleCrestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_LibertyFarmsMember" abstract="true" name="LibertyFarmsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_WindsorWoodsVillageMember" abstract="true" name="WindsorWoodsVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SecondTerminatedLeaseMember" abstract="true" name="SecondTerminatedLeaseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_ReclassificationErrorCorrectionPolicyTextBlock" abstract="false" name="ReclassificationErrorCorrectionPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="sui_TransfersAccountedForAsSecuredBorrowingsAssetsGross" abstract="false" name="TransfersAccountedForAsSecuredBorrowingsAssetsGross" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_RainbowVillageMember" abstract="true" name="RainbowVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1: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_ScheduleofIntangibleAssetsAmortizationExpenseTableTextBlock" abstract="false" name="ScheduleofIntangibleAssetsAmortizationExpenseTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="sui_ScioFarmsMember" abstract="true" name="ScioFarmsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1: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_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOtherAdjustments" abstract="false" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOtherAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_PleasantBeachCampgroundMember" abstract="true" name="PleasantBeachCampgroundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_VariableInterestEntityasaPercentageofConsolidatedAssets" abstract="false" name="VariableInterestEntityasaPercentageofConsolidatedAssets" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="sui_SafeHarborPortPhoenixMember" abstract="true" name="SafeHarborPortPhoenixMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SeaAirVillageMember" abstract="true" name="SeaAirVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_DebtInstrumentMaturityDateDomain" abstract="true" name="DebtInstrumentMaturityDateDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TemporaryEquityConversionRatio" abstract="false" name="TemporaryEquityConversionRatio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="sui_AmbleLinksMember" abstract="true" name="AmbleLinksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_CrestwoodMember" abstract="true" name="CrestwoodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_PalmVillageMember" abstract="true" name="PalmVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborPodickoryPointMember" abstract="true" name="SafeHarborPodickoryPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_VallecitoMember" abstract="true" name="VallecitoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_BowlandFellMember" abstract="true" name="BowlandFellMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_BrentwoodEstatesMember" abstract="true" name="BrentwoodEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_JellystoneParkTMChincoteagueIslandMember" abstract="true" name="JellystoneParkTMChincoteagueIslandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunRetreatsSilverLakeMember" abstract="true" name="SunRetreatsSilverLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesFairValueAdjustment" abstract="false" name="TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesFairValueAdjustment" nillable="true" xbrli:periodType="instant" 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-types1:textBlockItemType"/>
  <xs:element id="sui_CountryVillageMember" abstract="true" name="CountryVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_BellCrossingMember" abstract="true" name="BellCrossingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_WoodlakeTrailsMember" abstract="true" name="WoodlakeTrailsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_PecanBranchMember" abstract="true" name="PecanBranchMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_FondDuLacEastKettleMoraineKOAMember" abstract="true" name="FondDuLacEastKettleMoraineKOAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_MajesticOaksMember" abstract="true" name="MajesticOaksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_SunRetreatsIpperwashMember" abstract="true" name="SunRetreatsIpperwashMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_NumberOfRealEstateAssetsSecuringNote" abstract="false" name="NumberOfRealEstateAssetsSecuringNote" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
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  <xs:element id="sui_YankeeVillageMember" abstract="true" name="YankeeVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_FourteenSubsidiariesFollowingSunNGTransactionInQ42023Member" abstract="true" name="FourteenSubsidiariesFollowingSunNGTransactionInQ42023Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_CountrysideAtlantaMember" abstract="true" name="CountrysideAtlantaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_StOsythBeachMember" abstract="true" name="StOsythBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_TemporaryEquityAndStockIssuedDuringPeriodValueConversionOfConvertibleSecurities" abstract="false" name="TemporaryEquityAndStockIssuedDuringPeriodValueConversionOfConvertibleSecurities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_ByronCenterMember" abstract="true" name="ByronCenterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_OaklandsMember" abstract="true" name="OaklandsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1: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_FarmwoodVillageMember" abstract="true" name="FarmwoodVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_ParksideVillageMember" abstract="true" name="ParksideVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_LaCasaBlancaMember" abstract="true" name="LaCasaBlancaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_NotesDueFromRealEstateDevelopersMember" abstract="true" name="NotesDueFromRealEstateDevelopersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <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_JellystoneParkOfWesternNewYorkMember" abstract="true" name="JellystoneParkOfWesternNewYorkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_KnollwoodEstatesMember" abstract="true" name="KnollwoodEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_PineTraceMember" abstract="true" name="PineTraceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_CostOfHomesSold" abstract="false" name="CostOfHomesSold" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" 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-types1:domainItemType"/>
  <xs:element id="sui_RiversideDriveParkMember" abstract="true" name="RiversideDriveParkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_RealEstateReacquiredGainLoss" abstract="false" name="RealEstateReacquiredGainLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SunOutdoorsGardenCityUtahMember" abstract="true" name="SunOutdoorsGardenCityUtahMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_BluebonnetLakeMember" abstract="true" name="BluebonnetLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_FriendlyVillageofSimiMember" abstract="true" name="FriendlyVillageofSimiMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_LazyJRanchMember" abstract="true" name="LazyJRanchMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborEmeraldCoastMember" abstract="true" name="SafeHarborEmeraldCoastMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SHMSouthForkJVLLCMember" abstract="true" name="SHMSouthForkJVLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_TheValleyMember" abstract="true" name="TheValleyMember" 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_SafeHarborToledoBeachMember" abstract="true" name="SafeHarborToledoBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_LakePointeVillageMember" abstract="true" name="LakePointeVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunRetreatsGenevaOnTheLakeMember" abstract="true" name="SunRetreatsGenevaOnTheLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_OceanBreezeMember" abstract="true" name="OceanBreezeMember" 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-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborMarinaBayMember" abstract="true" name="SafeHarborMarinaBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_AspenSeriesB3PreferredOperatingPartnershipUnitsMember" abstract="true" name="AspenSeriesB3PreferredOperatingPartnershipUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_BirchingtonValeMember" abstract="true" name="BirchingtonValeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_HengarManorMember" abstract="true" name="HengarManorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_ThunderhillEstatesMember" abstract="true" name="ThunderhillEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_ChangeInDistributionsDeclaredAndOutstanding" abstract="false" name="ChangeInDistributionsDeclaredAndOutstanding" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_SafeHarborBallenaIsleMember" abstract="true" name="SafeHarborBallenaIsleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_MarinasMember" abstract="true" name="MarinasMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_TheRidgeMember" abstract="true" name="TheRidgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunRetreatsHayBayMember" abstract="true" name="SunRetreatsHayBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_VistadelLagoMHRVResortMember" abstract="true" name="VistadelLagoMHRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_MenifeeDevelopmentMember" abstract="true" name="MenifeeDevelopmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_WillowCrossingMember" abstract="true" name="WillowCrossingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NumberOfPropertiesReacquired" abstract="false" name="NumberOfPropertiesReacquired" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
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  <xs:element id="sui_TroyVillaMember" abstract="true" name="TroyVillaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_ForestSpringsMember" abstract="true" name="ForestSpringsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_ManufacturedHomeCommunityMember" abstract="true" name="ManufacturedHomeCommunityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunOutdoorsKensingtonValleyMember" abstract="true" name="SunOutdoorsKensingtonValleyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborNewEnglandBoatworksMember" abstract="true" name="SafeHarborNewEnglandBoatworksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <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_GainLossOnDispositionOfPropertiesMember" abstract="true" name="GainLossOnDispositionOfPropertiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_CaveCreekMember" abstract="true" name="CaveCreekMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1: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_JellystoneParkAtMemphisMember" abstract="true" name="JellystoneParkAtMemphisMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_AllMarinaPropertiesIncludingMarinasHeadquartersAndOtherMember" abstract="true" name="AllMarinaPropertiesIncludingMarinasHeadquartersAndOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunOutdoorsSantaBarbaraMember" abstract="true" name="SunOutdoorsSantaBarbaraMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborSilverSpringMember" abstract="true" name="SafeHarborSilverSpringMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SheffieldEstatesMember" abstract="true" name="SheffieldEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_WeightedAverageDiscountRateAbstract" abstract="true" name="WeightedAverageDiscountRateAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <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_TimberRidgeMember" abstract="true" name="TimberRidgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_BluewaterMember" abstract="true" name="BluewaterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PebbleCreekMember" abstract="true" name="PebbleCreekMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_TemporaryEquityCommonOpUnitConversionRatio" abstract="false" name="TemporaryEquityCommonOpUnitConversionRatio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="sui_TemporaryEquityTerm" abstract="false" name="TemporaryEquityTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <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_SunRetreatsGwynnsIslandMember" abstract="true" name="SunRetreatsGwynnsIslandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_WestwardShoresCottagesRVResortMember" abstract="true" name="WestwardShoresCottagesRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1: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_ScheduleOfTaxCharacterizationOfDividendsTableTextBlock" abstract="false" name="ScheduleOfTaxCharacterizationOfDividendsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="sui_A5.5SeniorUnsecuredNotesDue2029Member" abstract="true" name="A5.5SeniorUnsecuredNotesDue2029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatNaplesMember" abstract="true" name="SunRetreatNaplesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1: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_BayfrontMarinaMember" abstract="true" name="BayfrontMarinaMember" 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-types1: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_SafeHarborWisdomDockMember" abstract="true" name="SafeHarborWisdomDockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunRetreatsStratfordMember" abstract="true" name="SunRetreatsStratfordMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_LamplighterMember" abstract="true" name="LamplighterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_TreetopsMember" abstract="true" name="TreetopsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_BluewaterYachtSalesMember" abstract="true" name="BluewaterYachtSalesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_ConvertiblePreferredStockConversionPrice" abstract="false" name="ConvertiblePreferredStockConversionPrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="sui_JarrettBayBluewaterYachtSalesMember" abstract="true" name="JarrettBayBluewaterYachtSalesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_JellystoneParkAtGoldenValleyMember" abstract="true" name="JellystoneParkAtGoldenValleyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_LostDutchmanMember" abstract="true" name="LostDutchmanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_SunRetreatsOcalaOrangeLakeMember" abstract="true" name="SunRetreatsOcalaOrangeLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_SpanishTrailsWestMember" abstract="true" name="SpanishTrailsWestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_PaymentsOnFinancialLiabilityFailedSaleLeaseback" abstract="false" name="PaymentsOnFinancialLiabilityFailedSaleLeaseback" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_MaturesOctober12022389InterestRateMember" abstract="true" name="MaturesOctober12022389InterestRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunRetreatsAtPleasantAcresFarmMember" abstract="true" name="SunRetreatsAtPleasantAcresFarmMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_SunOutdoorsRehobothBayMember" abstract="true" name="SunOutdoorsRehobothBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunRetreatsAvalonMember" abstract="true" name="SunRetreatsAvalonMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SuncoastGatewayMember" abstract="true" name="SuncoastGatewayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_TheSandsRVGolfCourseMember" abstract="true" name="TheSandsRVGolfCourseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SunSolarEnergyProjectCAIIMember" abstract="true" name="SunSolarEnergyProjectCAIIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_CountryAcresMember" abstract="true" name="CountryAcresMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_CorporateHeadquartersMember" abstract="true" name="CorporateHeadquartersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_SunOutdoorsLakeTravisMember" abstract="true" name="SunOutdoorsLakeTravisMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_MeadowLakeEstatesMember" abstract="true" name="MeadowLakeEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sui_SafeHarborIslandParkMember" abstract="true" name="SafeHarborIslandParkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_SunValleyMember" abstract="true" name="SunValleyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_HuntersGlenMember" abstract="true" name="HuntersGlenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_SafeHarborPostRoadMember" abstract="true" name="SafeHarborPostRoadMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sui_NumberOfSharesSoldInForwardSaleTransaction" abstract="false" name="NumberOfSharesSoldInForwardSaleTransaction" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
</xs:schema>
