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  <xs:element id="sui_CherrystoneFamilyCampingResortMember" abstract="true" name="CherrystoneFamilyCampingResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_CanyonlandsMember" abstract="true" name="CanyonlandsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_StClairPlaceMember" abstract="true" name="StClairPlaceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_WoodlandlakeTrailsRVResortandCampgroundMember" abstract="true" name="WoodlandlakeTrailsRVResortandCampgroundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LeasesOtherInformationAbstract" abstract="true" name="LeasesOtherInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
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  <xs:element id="sui_NumberofRealEstateUnitsReleased" abstract="false" name="NumberofRealEstateUnitsReleased" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_SunOutdoorsOceanCityMember" abstract="true" name="SunOutdoorsOceanCityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborPostRoadMember" abstract="true" name="SafeHarborPostRoadMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_FortWhaleyMember" abstract="true" name="FortWhaleyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_KingsManorMember" abstract="true" name="KingsManorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HaasLakeParkRVMember" abstract="true" name="HaasLakeParkRVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AwardDateFiveMember" abstract="true" name="AwardDateFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_Settlementofmembershipinterest" abstract="false" name="Settlementofmembershipinterest" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_ShenandoahAcresFamilyCampgroundMember" abstract="true" name="ShenandoahAcresFamilyCampgroundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_CarringtonPointeMember" abstract="true" name="CarringtonPointeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_ForestViewMember" abstract="true" name="ForestViewMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ContingentConsiderationEarnOutProvision" abstract="false" name="ContingentConsiderationEarnOutProvision" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_LakeshoreLandingsMember" abstract="true" name="LakeshoreLandingsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TemporaryEquityConsolidatedVIE" abstract="false" name="TemporaryEquityConsolidatedVIE" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_CharlevoixEstatesMember" abstract="true" name="CharlevoixEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborPortRoyalMember" abstract="true" name="SafeHarborPortRoyalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfFuturePeriodCostsAxis" abstract="true" name="ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfFuturePeriodCostsAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
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  <xs:element id="sui_SafeHarborGreatIslandMember" abstract="true" name="SafeHarborGreatIslandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_SVLiftLLCMember" abstract="true" name="SVLiftLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_IslamoradoMarinaPropertyMember" abstract="true" name="IslamoradoMarinaPropertyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_VerdePlazaMember" abstract="true" name="VerdePlazaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_ShelbyWestMember" abstract="true" name="ShelbyWestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_WillowLakeRVResortCampgroundMember" abstract="true" name="WillowLakeRVResortCampgroundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_SunOutdoorsMarathonMember" abstract="true" name="SunOutdoorsMarathonMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TampaEastMember" abstract="true" name="TampaEastMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RiversideDriveParkMember" abstract="true" name="RiversideDriveParkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_CabrilloIsleAndEmeraldCoastMember" abstract="true" name="CabrilloIsleAndEmeraldCoastMember" 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-types:domainItemType"/>
  <xs:element id="sui_NumberofUnitsinRealEstatePropertyDevelopmentSites" abstract="false" name="NumberofUnitsinRealEstatePropertyDevelopmentSites" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_FarHorizons49erVillageMember" abstract="true" name="FarHorizons49erVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_EquityMethodInvestmentInitialFairValueOptionAdjustment" abstract="false" name="EquityMethodInvestmentInitialFairValueOptionAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_TamaracVillageMember" abstract="true" name="TamaracVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TransientRVRevenue" abstract="false" name="TransientRVRevenue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_ScheduleOfSharebasedCompensationCostsRelatedToUnvestedRestrictedStockTableTextBlock" abstract="false" name="ScheduleOfSharebasedCompensationCostsRelatedToUnvestedRestrictedStockTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
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  <xs:element id="sui_CherrywoodMember" abstract="true" name="CherrywoodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborMearsAnnapolisMember" abstract="true" name="SafeHarborMearsAnnapolisMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_JarrettBayBoatworksMember" abstract="true" name="JarrettBayBoatworksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RiverRanchMember" abstract="true" name="RiverRanchMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AwardDateTenMember" abstract="true" name="AwardDateTenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunNFunRVResortMember" abstract="true" name="SunNFunRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_JetstreamRVResortMember" abstract="true" name="JetstreamRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_EquityMethodInvestmentFairValueAdjustment" abstract="false" name="EquityMethodInvestmentFairValueAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_JellystoneParkAtGoldenValleyMember" abstract="true" name="JellystoneParkAtGoldenValleyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_Issuanceofnotesandotherreceivables" abstract="false" name="Issuanceofnotesandotherreceivables" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_AspenSeriesB3PreferredOperatingPartnershipUnitsMember" abstract="true" name="AspenSeriesB3PreferredOperatingPartnershipUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsCapeMayWildwoodMember" abstract="true" name="SunRetreatsCapeMayWildwoodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RealEstateAcquisitionCosts" abstract="false" name="RealEstateAcquisitionCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SunOutdoorsCapeCodMember" abstract="true" name="SunOutdoorsCapeCodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ScheduleOfCollateralizedLoansTableTextBlock" abstract="false" name="ScheduleOfCollateralizedLoansTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="sui_CapeMayCrossingMember" abstract="true" name="CapeMayCrossingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsAvalonMember" abstract="true" name="SunRetreatsAvalonMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NumberofMHSites" abstract="false" name="NumberofMHSites" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_NumberOfCommunitiesImpaired" abstract="false" name="NumberOfCommunitiesImpaired" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_BushnellMotorHomeCommunityMember" abstract="true" name="BushnellMotorHomeCommunityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WaldenWoodsMember" abstract="true" name="WaldenWoodsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AwardDateTwoMember" abstract="true" name="AwardDateTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunValleyMember" abstract="true" name="SunValleyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LakefrontMember" abstract="true" name="LakefrontMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SmithCreekCrossingMember" abstract="true" name="SmithCreekCrossingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_EagleCrestMember" abstract="true" name="EagleCrestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ButtonwoodBayMember" abstract="true" name="ButtonwoodBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PheasantRidgeRVParkMember" abstract="true" name="PheasantRidgeRVParkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TimberRidgeMember" abstract="true" name="TimberRidgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsPanamaCityBeachMember" abstract="true" name="SunOutdoorsPanamaCityBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_IndianWellsRVResortMember" abstract="true" name="IndianWellsRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborSanduskyMember" abstract="true" name="SafeHarborSanduskyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NumberOfLandParcelsAcquiredAdjacentToExistingCommunities" abstract="false" name="NumberOfLandParcelsAcquiredAdjacentToExistingCommunities" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
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  <xs:element id="sui_NumberOfForwardSalesAgreements" abstract="false" name="NumberOfForwardSalesAgreements" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_LineOfCreditManufacturedHomeFloorPlanFacilityMember" abstract="true" name="LineOfCreditManufacturedHomeFloorPlanFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FiestaVillageMember" abstract="true" name="FiestaVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunCommunitiesMember" abstract="true" name="SunCommunitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_EastForkMember" abstract="true" name="EastForkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborRybovichPortfolioMember" abstract="true" name="SafeHarborRybovichPortfolioMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LeisureSystemsIncMember" abstract="true" name="LeisureSystemsIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeriesHPreferredOPUnitsMember" abstract="true" name="SeriesHPreferredOPUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HomeSalesAndHomeRentalsSegmentMember" abstract="true" name="HomeSalesAndHomeRentalsSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AwardDateSevenMember" abstract="true" name="AwardDateSevenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SherkstonShoresBeachResortCampgroundMember" abstract="true" name="SherkstonShoresBeachResortCampgroundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TownCountryVillageMember" abstract="true" name="TownCountryVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RVMember" abstract="true" name="RVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LakeSanMarinoMember" abstract="true" name="LakeSanMarinoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TemporaryEquityIssuancePrice" abstract="false" name="TemporaryEquityIssuancePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="sui_SafeHarborWillsboroBayMember" abstract="true" name="SafeHarborWillsboroBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HighlandGreenEstatesTroyVillaMember" abstract="true" name="HighlandGreenEstatesTroyVillaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_JellystoneParkAtMarylandMember" abstract="true" name="JellystoneParkAtMarylandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RealEstateDispositionsAndOther" abstract="false" name="RealEstateDispositionsAndOther" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SunOutdoorsMysticMember" abstract="true" name="SunOutdoorsMysticMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LifeCompaniesMember" abstract="true" name="LifeCompaniesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HancockHeightsEstatesMember" abstract="true" name="HancockHeightsEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborAnacapaIsleMember" abstract="true" name="SafeHarborAnacapaIsleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_GroveRidgeRVResortMember" abstract="true" name="GroveRidgeRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MeadowlandsofGibraltarMember" abstract="true" name="MeadowlandsofGibraltarMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CiderMillVillageMember" abstract="true" name="CiderMillVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RealEstateInvestmentPropertyPolicyTextBlock" abstract="false" name="RealEstateInvestmentPropertyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="sui_SeniorUnsecuredNotesJuly2031MaturityFirstTrancheMember" abstract="true" name="SeniorUnsecuredNotesJuly2031MaturityFirstTrancheMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RelatedPartyTransactionEquityInterestInOfficeSpacePercentage" abstract="false" name="RelatedPartyTransactionEquityInterestInOfficeSpacePercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="sui_SafeHarborCapeHarbourMember" abstract="true" name="SafeHarborCapeHarbourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsSarasotaMember" abstract="true" name="SunOutdoorsSarasotaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BigTreeRVResortMember" abstract="true" name="BigTreeRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CiscoGroveCampgroundRVMember" abstract="true" name="CiscoGroveCampgroundRVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LakePointeVillageMember" abstract="true" name="LakePointeVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RealEstateInvestmentPropertyLandImprovementsAndBuildings" abstract="false" name="RealEstateInvestmentPropertyLandImprovementsAndBuildings" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SharebasedCompensationAwardTrancheFiveMember" abstract="true" name="SharebasedCompensationAwardTrancheFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborAquaYachtMember" abstract="true" name="SafeHarborAquaYachtMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AssetsHeldForSaleAdjustmentOfNotesReceivable" abstract="false" name="AssetsHeldForSaleAdjustmentOfNotesReceivable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SunOutdoorsOceanCityGatewayMember" abstract="true" name="SunOutdoorsOceanCityGatewayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborHacksPointMember" abstract="true" name="SafeHarborHacksPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ChangesInFairValueLevel3Axis" abstract="true" name="ChangesInFairValueLevel3Axis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="sui_OtherAssetsNetMember" abstract="true" name="OtherAssetsNetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SouthforkMember" abstract="true" name="SouthforkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OperatingandFinanceLiability" abstract="false" name="OperatingandFinanceLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_DebtInstrumentAmortizationTerm" abstract="false" name="DebtInstrumentAmortizationTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="sui_AutumnRidgeMember" abstract="true" name="AutumnRidgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RiverHavenMember" abstract="true" name="RiverHavenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NetIncomeLossIncludingPortionAttributableToNoncontrollingInterestAndReturnsFromPreferredStock" abstract="false" name="NetIncomeLossIncludingPortionAttributableToNoncontrollingInterestAndReturnsFromPreferredStock" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_CabrilloIsleMember" abstract="true" name="CabrilloIsleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ChisholmPointMember" abstract="true" name="ChisholmPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ShelbyForestMember" abstract="true" name="ShelbyForestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_InvestmentPropertyNet" abstract="false" name="InvestmentPropertyNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_WoodsmokeCampingResportMember" abstract="true" name="WoodsmokeCampingResportMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BeachwoodResortMember" abstract="true" name="BeachwoodResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_IncomeTaxExpenseBenefitTaxableSubsidiariesPercent" abstract="false" name="IncomeTaxExpenseBenefitTaxableSubsidiariesPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sui_SouthernLeisureRVResortMember" abstract="true" name="SouthernLeisureRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeriesGPreferredOPUnitsMember" abstract="true" name="SeriesGPreferredOPUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NumberOfLandParcelsAcquired" abstract="false" name="NumberOfLandParcelsAcquired" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_ParkPlaceMember" abstract="true" name="ParkPlaceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LakeviewMobileEstates1Member" abstract="true" name="LakeviewMobileEstates1Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PrepaymentPenaltyDebt" abstract="false" name="PrepaymentPenaltyDebt" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SeriesA4PreferredOpUnitsMember" abstract="true" name="SeriesA4PreferredOpUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborGrandIsleMember" abstract="true" name="SafeHarborGrandIsleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HollyVillageHawaiianGardensMember" abstract="true" name="HollyVillageHawaiianGardensMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_VariableInterestEntityContingentConsiderationEarnoutProvision" abstract="false" name="VariableInterestEntityContingentConsiderationEarnoutProvision" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SouthernCharmRVResortMember" abstract="true" name="SouthernCharmRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HuntersCrossingMember" abstract="true" name="HuntersCrossingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DilutiveSecurityAxis" abstract="true" name="DilutiveSecurityAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="sui_JellystoneParkOfWesternNewYorkMember" abstract="true" name="JellystoneParkOfWesternNewYorkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BrentwoodEstatesMember" abstract="true" name="BrentwoodEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CapeCodRVResortMember" abstract="true" name="CapeCodRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CountryAcresMember" abstract="true" name="CountryAcresMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssetsLiabilities" abstract="false" name="AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssetsLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SafeHarborCapriMember" abstract="true" name="SafeHarborCapriMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TheHamptonsMember" abstract="true" name="TheHamptonsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborSouthHarbourVillageMember" abstract="true" name="SafeHarborSouthHarbourVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborBahiaBleuMember" abstract="true" name="SafeHarborBahiaBleuMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SouthernPalmsMember" abstract="true" name="SouthernPalmsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LemonWoodMember" abstract="true" name="LemonWoodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborGreenwichBayMember" abstract="true" name="SafeHarborGreenwichBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MarinasHeadquartersAndOtherMember" abstract="true" name="MarinasHeadquartersAndOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TheWillowsMember" abstract="true" name="TheWillowsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CrownVillaRVResortMember" abstract="true" name="CrownVillaRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BroadviewEstatesMember" abstract="true" name="BroadviewEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WindhamHillsMember" abstract="true" name="WindhamHillsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentAssetsLiabilitiesInventory" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentAssetsLiabilitiesInventory" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_AnnualRvSitesMember" abstract="true" name="AnnualRvSitesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WineCountryMember" abstract="true" name="WineCountryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LamplighterMember" abstract="true" name="LamplighterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CavaRoblesRVResortMember" abstract="true" name="CavaRoblesRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CiderMillCrossingsMember" abstract="true" name="CiderMillCrossingsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ImpairmentofIntangibleAssetsAccumulatedAmortization" abstract="false" name="ImpairmentofIntangibleAssetsAccumulatedAmortization" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_BrentwoodWestMember" abstract="true" name="BrentwoodWestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FinancialInstrumentsSubjecttoMandatoryRedemptionValueofSharesIssued" abstract="false" name="FinancialInstrumentsSubjecttoMandatoryRedemptionValueofSharesIssued" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_GlenEllisMember" abstract="true" name="GlenEllisMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborAnglerHouseMember" abstract="true" name="SafeHarborAnglerHouseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_StockBasedCompensationAmortizationAndForfeitures" abstract="false" name="StockBasedCompensationAmortizationAndForfeitures" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_LakelandRVResortMember" abstract="true" name="LakelandRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FrontierTownMember" abstract="true" name="FrontierTownMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RichmondMember" abstract="true" name="RichmondMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WhiteLakeMember" abstract="true" name="WhiteLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborEmeraldCoastMember" abstract="true" name="SafeHarborEmeraldCoastMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborSiestaKeyMember" abstract="true" name="SafeHarborSiestaKeyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RivieraBeachMember" abstract="true" name="RivieraBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MeadowbrookVillageMember" abstract="true" name="MeadowbrookVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NumberofRVSites" abstract="false" name="NumberofRVSites" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_ShellCreekRVResortMarinaMember" abstract="true" name="ShellCreekRVResortMarinaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OceanPineMember" abstract="true" name="OceanPineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SHMSouthForkJVLLCMember" abstract="true" name="SHMSouthForkJVLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ColonyInTheWoodMember" abstract="true" name="ColonyInTheWoodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_HarborageYachtClubMember" abstract="true" name="HarborageYachtClubMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_JellystoneParkAtQuarryvilleMember" abstract="true" name="JellystoneParkAtQuarryvilleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PresidentialMember" abstract="true" name="PresidentialMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborMarathonMember" abstract="true" name="SafeHarborMarathonMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SouthfieldOfficeBuildingMember" abstract="true" name="SouthfieldOfficeBuildingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsLakeTravisMember" abstract="true" name="SunOutdoorsLakeTravisMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_KimberlyEstatesMember" abstract="true" name="KimberlyEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PandionRidgeMember" abstract="true" name="PandionRidgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BluebonnetLakeMember" abstract="true" name="BluebonnetLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SuncoastGatewayMember" abstract="true" name="SuncoastGatewayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FannieMaeFinancingTermLoanTwoMember" abstract="true" name="FannieMaeFinancingTermLoanTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HiddenRidgeMember" abstract="true" name="HiddenRidgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PleasantBeachCampgroundMember" abstract="true" name="PleasantBeachCampgroundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CedarSpringsMember" abstract="true" name="CedarSpringsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborBeaufortMember" abstract="true" name="SafeHarborBeaufortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MinimumPercentOfIncomeFromQualifyingSourcesToAllowForRealEstateInvestmentTrustClassification" abstract="false" name="MinimumPercentOfIncomeFromQualifyingSourcesToAllowForRealEstateInvestmentTrustClassification" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sui_Brokeragecommissionsandotherincomenet" abstract="false" name="Brokeragecommissionsandotherincomenet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_BoulderRidgeMember" abstract="true" name="BoulderRidgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsOldOrchardBeachMember" abstract="true" name="SunRetreatsOldOrchardBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RiptideRVResortMarinaMember" abstract="true" name="RiptideRVResortMarinaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunNGRVResortsMember" abstract="true" name="SunNGRVResortsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MorethanTwoandWithinThreeYearsMember" abstract="true" name="MorethanTwoandWithinThreeYearsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NewPointRVResortMember" abstract="true" name="NewPointRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_EquityMethodInvestmentAdjustmentOfAllowanceForLosses" abstract="false" name="EquityMethodInvestmentAdjustmentOfAllowanceForLosses" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_MorethanOneandwithinTwoYearsMember" abstract="true" name="MorethanOneandwithinTwoYearsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsKeyLargoMember" abstract="true" name="SunOutdoorsKeyLargoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_IncomeFromRealPropertyMember" abstract="true" name="IncomeFromRealPropertyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RealPropertyOperationsSegmentMember" abstract="true" name="RealPropertyOperationsSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment" abstract="false" name="AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_NorthPointEstatesMember" abstract="true" name="NorthPointEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DockImprovementsMember" abstract="true" name="DockImprovementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt" abstract="false" name="AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_RiversideVillageMember" abstract="true" name="RiversideVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SycamoreVillageMember" abstract="true" name="SycamoreVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_ThreeGardensMember" abstract="true" name="ThreeGardensMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeriesB3PreferredOPUnitsMember" abstract="true" name="SeriesB3PreferredOPUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborSkullCreekMember" abstract="true" name="SafeHarborSkullCreekMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_SharesIssuedWeightedAveragePricePerShare" abstract="false" name="SharesIssuedWeightedAveragePricePerShare" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="sui_SafeHarborNewportShipyardMember" abstract="true" name="SafeHarborNewportShipyardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_EffectiveIncomeTaxRateReconciliationAlternativeMinimumTaxAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationAlternativeMinimumTaxAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_SunOutdoorsTexasHillCountryMember" abstract="true" name="SunOutdoorsTexasHillCountryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PeriodIncreaseDecreaseInNotesReceivable" abstract="false" name="PeriodIncreaseDecreaseInNotesReceivable" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_MiTeJoCampgroundMember" abstract="true" name="MiTeJoCampgroundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunMorenoMember" abstract="true" name="SunMorenoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsLiabilitiesGoodwillAndOtherIntangibleAssets" abstract="false" name="AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsLiabilitiesGoodwillAndOtherIntangibleAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_FriendlyVillageofSimiMember" abstract="true" name="FriendlyVillageofSimiMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HendersonRVCommunityMember" abstract="true" name="HendersonRVCommunityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PropertyOperatingAndMaintenance" abstract="false" name="PropertyOperatingAndMaintenance" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_RainbowVillageofLargoMember" abstract="true" name="RainbowVillageofLargoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AssetAcquisitionPurchasePriceAllocationAdjustment" abstract="false" name="AssetAcquisitionPurchasePriceAllocationAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_OceansideMember" abstract="true" name="OceansideMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AwardDateThreeMember" abstract="true" name="AwardDateThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborApponaugHarborMember" abstract="true" name="SafeHarborApponaugHarborMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NumberOfMHCommunities" abstract="false" name="NumberOfMHCommunities" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_StockIssuedDuringPeriodValueNewIssuesSeriesA3PreferredOPUnits" abstract="false" name="StockIssuedDuringPeriodValueNewIssuesSeriesA3PreferredOPUnits" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_NotesduefromRealEstateDevelopersMember" abstract="true" name="NotesduefromRealEstateDevelopersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborLochLomondMember" abstract="true" name="SafeHarborLochLomondMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_DirectorPlansMember" abstract="true" name="DirectorPlansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RequiredMinimumPercentOfTaxableIncomeDistributedToStockHolders" abstract="false" name="RequiredMinimumPercentOfTaxableIncomeDistributedToStockHolders" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sui_VariableInterestEntityEquityInterestsIssuedFloatingRate" abstract="false" name="VariableInterestEntityEquityInterestsIssuedFloatingRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sui_WoodlandsatChurchLakeMember" abstract="true" name="WoodlandsatChurchLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RelatedPartyTransactionsCurrentandFutureBaseRent" abstract="false" name="RelatedPartyTransactionsCurrentandFutureBaseRent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:decimalItemType"/>
  <xs:element id="sui_KingsCourtMember" abstract="true" name="KingsCourtMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RiverPinesMember" abstract="true" name="RiverPinesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SylvanCrossingMember" abstract="true" name="SylvanCrossingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ScheduleOfTaxCharacterizationOfDividendsTableTextBlock" abstract="false" name="ScheduleOfTaxCharacterizationOfDividendsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="sui_SummitRidgeMember" abstract="true" name="SummitRidgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OperatingandFinanceLeasesLiabilityPaymentsDueNextTwelveMonths" abstract="false" name="OperatingandFinanceLeasesLiabilityPaymentsDueNextTwelveMonths" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SafeHarborBallenaIsleMember" abstract="true" name="SafeHarborBallenaIsleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NGSunWhitewaterMember" abstract="true" name="NGSunWhitewaterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HarrisonYachtYardMember" abstract="true" name="HarrisonYachtYardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborKingsPointMember" abstract="true" name="SafeHarborKingsPointMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TravelersWorldRVResortMember" abstract="true" name="TravelersWorldRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CorporateHeadquartersMember" abstract="true" name="CorporateHeadquartersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ElCapitanCanyonMember" abstract="true" name="ElCapitanCanyonMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AwardDateFourMember" abstract="true" name="AwardDateFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CountryMeadowsVillageMember" abstract="true" name="CountryMeadowsVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_VIEasaPercentageofTotalEquity" abstract="false" name="VIEasaPercentageofTotalEquity" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sui_RemeasurementOfNotesReceivableAndEquityMethodInvestments" abstract="false" name="RemeasurementOfNotesReceivableAndEquityMethodInvestments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_SunMenifeeMember" abstract="true" name="SunMenifeeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RollingHillsMember" abstract="true" name="RollingHillsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_JellystoneParkAtWhisperingPinesMember" abstract="true" name="JellystoneParkAtWhisperingPinesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HemlocksMember" abstract="true" name="HemlocksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborHarborageYachtClubMember" abstract="true" name="SafeHarborHarborageYachtClubMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_GrovesMember" abstract="true" name="GrovesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunOutdoorsOrlandoChampionsGateMember" abstract="true" name="SunOutdoorsOrlandoChampionsGateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TreasuryLockFebruary2022Member" abstract="true" name="TreasuryLockFebruary2022Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TermLoanMember" abstract="true" name="TermLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SouthportSpringsMember" abstract="true" name="SouthportSpringsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MouseMountainMember" abstract="true" name="MouseMountainMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_IslamoradaAndAnglerHouseMember" abstract="true" name="IslamoradaAndAnglerHouseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AugustaVillageMember" abstract="true" name="AugustaVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FinancingReceivablePaymentsReceived" abstract="false" name="FinancingReceivablePaymentsReceived" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SafeHarborMarinaBayMember" abstract="true" name="SafeHarborMarinaBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedInNextTwelveMonths" abstract="false" name="EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedInNextTwelveMonths" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_HannahVillageMember" abstract="true" name="HannahVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_RockCrusherCanyonRVParkMember" abstract="true" name="RockCrusherCanyonRVParkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_SunOutdoorsLancasterCountyMember" abstract="true" name="SunOutdoorsLancasterCountyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_EquityInterests" abstract="false" name="EquityInterests" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_NGSunLLCMember" abstract="true" name="NGSunLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_RealEstateAccumulatedDepreciationEncumbrancesbyGroupCategoryFourMember" abstract="true" name="RealEstateAccumulatedDepreciationEncumbrancesbyGroupCategoryFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AppleCreekMember" abstract="true" name="AppleCreekMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_IngeniaMember" abstract="true" name="IngeniaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RoyalPalmsMHRVResortMember" abstract="true" name="RoyalPalmsMHRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_WentworthByTheSeaMember" abstract="true" name="WentworthByTheSeaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsLiabilitiesInventory" abstract="false" name="AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsLiabilitiesInventory" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_JellystoneParkOfChicagoMember" abstract="true" name="JellystoneParkOfChicagoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_MajesticOaksRVResortMember" abstract="true" name="MajesticOaksRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PickerelParkRVResortCampgroundMember" abstract="true" name="PickerelParkRVResortCampgroundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_EffectiveIncomeTaxRateReconciliationChangeinDeferredTaxAssetsAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationChangeinDeferredTaxAssetsAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_NorthLakeEstatesMember" abstract="true" name="NorthLakeEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_SunsetHarboratCowKeyMarinaMember" abstract="true" name="SunsetHarboratCowKeyMarinaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FourSeasonsMember" abstract="true" name="FourSeasonsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_GigHarborRVResortMember" abstract="true" name="GigHarborRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BirchHillEstatesMember" abstract="true" name="BirchHillEstatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborEmeryvilleMember" abstract="true" name="SafeHarborEmeryvilleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HamlinMember" abstract="true" name="HamlinMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LafontaineRVResortCampgroundMember" abstract="true" name="LafontaineRVResortCampgroundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LakeRudolphRVResortCampgroundMember" abstract="true" name="LakeRudolphRVResortCampgroundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_EgelcraftMember" abstract="true" name="EgelcraftMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SaleOfStockNumberOfSharesIssuedInTransactionDirect" abstract="false" name="SaleOfStockNumberOfSharesIssuedInTransactionDirect" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="sui_LazyLakesRVResortMember" abstract="true" name="LazyLakesRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_A2009EquityPlanMember" abstract="true" name="A2009EquityPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CommonOpUnitsMember" abstract="true" name="CommonOpUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborTradeWindsMember" abstract="true" name="SafeHarborTradeWindsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CountrysideLakeLanierMember" abstract="true" name="CountrysideLakeLanierMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PetoskeyRVResortMember" abstract="true" name="PetoskeyRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ScheduleOfInstallmentNotesReceivableTableTextBlock" abstract="false" name="ScheduleOfInstallmentNotesReceivableTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
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  <xs:element id="sui_SafeHarborDetroitRiverMember" abstract="true" name="SafeHarborDetroitRiverMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MaturesMarch120205.62PercentInterestRateMember" abstract="true" name="MaturesMarch120205.62PercentInterestRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LaurelHeightsMember" abstract="true" name="LaurelHeightsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborIslamoradaMember" abstract="true" name="SafeHarborIslamoradaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_KensingtonMeadowsMember" abstract="true" name="KensingtonMeadowsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_Moreno66DevelopmentMember" abstract="true" name="Moreno66DevelopmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SiestaBayMember" abstract="true" name="SiestaBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborJamestownMember" abstract="true" name="SafeHarborJamestownMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RudgateManorMember" abstract="true" name="RudgateManorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_GlenHavenRVResortMember" abstract="true" name="GlenHavenRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborToledoBeachMember" abstract="true" name="SafeHarborToledoBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SettlersRestRVResortMember" abstract="true" name="SettlersRestRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeniorUnsecuredNotesJuly2031Maturity2ndTrancheMember" abstract="true" name="SeniorUnsecuredNotesJuly2031Maturity2ndTrancheMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AssetAcquisitionConsiderationTransferredContingentConsiderationPaymentInEightYears" abstract="false" name="AssetAcquisitionConsiderationTransferredContingentConsiderationPaymentInEightYears" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_WoodsideTerraceMember" abstract="true" name="WoodsideTerraceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborPier121Member" abstract="true" name="SafeHarborPier121Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FranchiseAgreementsAndOtherIntangibleAssetsMember" abstract="true" name="FranchiseAgreementsAndOtherIntangibleAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_CollateralizedTermLoan1Member" abstract="true" name="CollateralizedTermLoan1Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MapleBrookMember" abstract="true" name="MapleBrookMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_MHMember" abstract="true" name="MHMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SouthernLeisureResortMember" abstract="true" name="SouthernLeisureResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CollateralizedReceivablesNetAndInstallmentNotesReceivablesOnManufacturedHomesMember" abstract="true" name="CollateralizedReceivablesNetAndInstallmentNotesReceivablesOnManufacturedHomesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ConvertibleSecuredPromissoryNoteMember" abstract="true" name="ConvertibleSecuredPromissoryNoteMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CobusGreenMember" abstract="true" name="CobusGreenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_JellystoneAtBartonLakeMember" abstract="true" name="JellystoneAtBartonLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_IslandLakeMember" abstract="true" name="IslandLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_FriendlyVillageofLaHabraMember" abstract="true" name="FriendlyVillageofLaHabraMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ScheduleOfNotesAndOtherReceivablesTableTextBlock" abstract="false" name="ScheduleOfNotesAndOtherReceivablesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="sui_CountryVillageMember" abstract="true" name="CountryVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TotalGTSCDebtMember" abstract="true" name="TotalGTSCDebtMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedInTwoYears" abstract="false" name="EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedInTwoYears" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_ArchviewMember" abstract="true" name="ArchviewMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_IncrementalCommonSharesAttributableToDilutiveEffectOfCommonEquity" abstract="false" name="IncrementalCommonSharesAttributableToDilutiveEffectOfCommonEquity" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
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  <xs:element id="sui_RainbowrvMember" abstract="true" name="RainbowrvMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PalmKeyVillageMember" abstract="true" name="PalmKeyVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborBelleMaerMember" abstract="true" name="SafeHarborBelleMaerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_UndrawnFundsOnLoans" abstract="false" name="UndrawnFundsOnLoans" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SafeHarborRybovichMarineCenterMember" abstract="true" name="SafeHarborRybovichMarineCenterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_KissimmeeSouthRVResortMember" abstract="true" name="KissimmeeSouthRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_IndianCreekMember" abstract="true" name="IndianCreekMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LakeviewMember" abstract="true" name="LakeviewMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ThemeworldRVResortMember" abstract="true" name="ThemeworldRVResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RiversideClubMember" abstract="true" name="RiversideClubMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_WellsBeachResortCampgroundMember" abstract="true" name="WellsBeachResortCampgroundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_VizcayaLakesMember" abstract="true" name="VizcayaLakesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_KittatinnyMember" abstract="true" name="KittatinnyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_ChulaVistaMember" abstract="true" name="ChulaVistaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborIslandParkMember" abstract="true" name="SafeHarborIslandParkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PelicanBayMember" abstract="true" name="PelicanBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CountrysideAtlantaMember" abstract="true" name="CountrysideAtlantaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BlueWaterBeachResortMember" abstract="true" name="BlueWaterBeachResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AllendaleMember" abstract="true" name="AllendaleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LeisureVillageMember" abstract="true" name="LeisureVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_OperatingExpensesAndCostOfSales" abstract="false" name="OperatingExpensesAndCostOfSales" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sui_HollyForestMember" abstract="true" name="HollyForestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="sui_ArborWoodsMember" abstract="true" name="ArborWoodsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SaddleOakClubMember" abstract="true" name="SaddleOakClubMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborSouthBayMember" abstract="true" name="SafeHarborSouthBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_BusinessCombinationsAndAssetsAcquisitionsMember" abstract="true" name="BusinessCombinationsAndAssetsAcquisitionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FondDuLacEastKettleMoraineKOAMember" abstract="true" name="FondDuLacEastKettleMoraineKOAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SeriesJPreferredOpUnitsMember" abstract="true" name="SeriesJPreferredOpUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AncillaryRevenue" abstract="false" name="AncillaryRevenue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SafeHarborSunsetBayMember" abstract="true" name="SafeHarborSunsetBayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RiverBeachCampsitesAndRVMember" abstract="true" name="RiverBeachCampsitesAndRVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FortDupontMember" abstract="true" name="FortDupontMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_InPlaceLeasesMember" abstract="true" name="InPlaceLeasesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_KeyEmployeesMember" abstract="true" name="KeyEmployeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FairfieldVillageMember" abstract="true" name="FairfieldVillageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SaddlebrookMember" abstract="true" name="SaddlebrookMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AssetAcquisitionAndBusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFiniteLivedIntangibles" abstract="false" name="AssetAcquisitionAndBusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFiniteLivedIntangibles" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_MaturesMay120234.3PercentInterestRateMember" abstract="true" name="MaturesMay120234.3PercentInterestRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_DilutiveSecurityDomain" abstract="true" name="DilutiveSecurityDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RainbowVillageofZepyrhillsMember" abstract="true" name="RainbowVillageofZepyrhillsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FutureLeasePaymentSubsequentPeriodsAxis" abstract="true" name="FutureLeasePaymentSubsequentPeriodsAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="sui_MeadowstoneMember" abstract="true" name="MeadowstoneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_CraigleithMember" abstract="true" name="CraigleithMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NumberOfSitesSuitableForDevelopment" abstract="false" name="NumberOfSitesSuitableForDevelopment" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_SouthernHillsMember" abstract="true" name="SouthernHillsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OperatingandFinanceLiabilityPaymentsDueYearFour" abstract="false" name="OperatingandFinanceLiabilityPaymentsDueYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_OperatingandFinanceLiabilityPaymentsDue" abstract="false" name="OperatingandFinanceLiabilityPaymentsDue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_EquityTransactionTypeAxis" abstract="true" name="EquityTransactionTypeAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="sui_BeaverBrookCampgroundMember" abstract="true" name="BeaverBrookCampgroundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_AdvancedReservationDepositsAndRent" abstract="false" name="AdvancedReservationDepositsAndRent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_SerendipityMember" abstract="true" name="SerendipityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_RealEstateAndAccumulatedDepreciationAmountOfEncumbrancesForGroupOfProperties" abstract="false" name="RealEstateAndAccumulatedDepreciationAmountOfEncumbrancesForGroupOfProperties" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_CapitalGainsMember" abstract="true" name="CapitalGainsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HaasLakeRVParkCampgroundMember" abstract="true" name="HaasLakeRVParkCampgroundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TheValleyMember" abstract="true" name="TheValleyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ClearWaterMobileMember" abstract="true" name="ClearWaterMobileMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ArborTerraceMember" abstract="true" name="ArborTerraceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NumberOfMarinasOwned" abstract="false" name="NumberOfMarinasOwned" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_OrdinaryDividendTaxablePercent" abstract="false" name="OrdinaryDividendTaxablePercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sui_OtherCapitalizedCostsPolicyTextBlock" abstract="false" name="OtherCapitalizedCostsPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="sui_RanchoAlipazMember" abstract="true" name="RanchoAlipazMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SafeHarborPinelandMember" abstract="true" name="SafeHarborPinelandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_SunRetreatsGenevaOnTheLakeMember" abstract="true" name="SunRetreatsGenevaOnTheLakeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_NumberOfHousingSitesSold" abstract="false" name="NumberOfHousingSitesSold" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sui_SafeHarborVenturaIsleMember" abstract="true" name="SafeHarborVenturaIsleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_OakCrestMember" abstract="true" name="OakCrestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PembrokeDownsMember" abstract="true" name="PembrokeDownsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_FreddieMacFinancingMember" abstract="true" name="FreddieMacFinancingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_PublicOfferingMember" abstract="true" name="PublicOfferingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_ConvertibleDebtAspenPreferredOpUnitsJanuary2024Member" abstract="true" name="ConvertibleDebtAspenPreferredOpUnitsJanuary2024Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_InstallmentNotesReceivableOnManufacturedHomesNetMember" abstract="true" name="InstallmentNotesReceivableOnManufacturedHomesNetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_LineOfCreditFacilityAdvances" abstract="false" name="LineOfCreditFacilityAdvances" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sui_FinancialInstrumentsSubjecttoMandatoryRedemptionTerm" abstract="false" name="FinancialInstrumentsSubjecttoMandatoryRedemptionTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="sui_RudgateClintonMember" abstract="true" name="RudgateClintonMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_HollyShoresCampingResortMember" abstract="true" name="HollyShoresCampingResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sui_TemporaryEquityDividendsForTermOnePercentage" abstract="false" name="TemporaryEquityDividendsForTermOnePercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
</xs:schema>
