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  <xsd:element abstract="true" id="sui_CostaVistaMember" name="CostaVistaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_CountryAcresMember" name="CountryAcresMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_CountryHillsVillageMember" name="CountryHillsVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_CountryLakesMember" name="CountryLakesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_CountryMeadowsMobileMember" name="CountryMeadowsMobileMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_CountryMeadowsVillageMember" name="CountryMeadowsVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_CountrySquireMHRVResortMember" name="CountrySquireMHRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_CountryVillageMember" name="CountryVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_CountrysideAtlantaMember" name="CountrysideAtlantaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_CountrysideEstatesMember" name="CountrysideEstatesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_CountrysideGwinnettMember" name="CountrysideGwinnettMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_CountrysideLakeLanierMember" name="CountrysideLakeLanierMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_CountrysideVillageMember" name="CountrysideVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_CoverPageAbstract" name="CoverPageAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_CraigleithMember" name="CraigleithMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_CreeksCrossingMember" name="CreeksCrossingMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_CreekwoodMeadowsMember" name="CreekwoodMeadowsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_CrestwoodMember" name="CrestwoodMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_CrossroadsMember" name="CrossroadsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_CutlerEstatesMember" name="CutlerEstatesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_CypressGreensMember" name="CypressGreensMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_DaytonaBeachRVResortMember" name="DaytonaBeachRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_DebtInstrumentAmortizationTerm" name="DebtInstrumentAmortizationTerm" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_DebtInstrumentBasisPriceinStockConversionCalculation" name="DebtInstrumentBasisPriceinStockConversionCalculation" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="instant" />
  <xsd:element id="sui_DebtInstrumentConvertiblePercentOfAmountByWhichTheMarketPriceOfCommonStockExceedsThreshold" name="DebtInstrumentConvertiblePercentOfAmountByWhichTheMarketPriceOfCommonStockExceedsThreshold" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_DebtInstrumentDefeased" name="DebtInstrumentDefeased" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="sui_DebtInstrumentNumberOfPropertiesSecuringDebtInstument" name="DebtInstrumentNumberOfPropertiesSecuringDebtInstument" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="sui_DebtInstrumentNumberofLoans" name="DebtInstrumentNumberofLoans" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_Debtweightedaveragetomaturitylength" name="Debtweightedaveragetomaturitylength" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_DeepRunMember" name="DeepRunMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_DeerLakeRVResortCampgroundMember" name="DeerLakeRVResortCampgroundMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_DeerfieldRunMember" name="DeerfieldRunMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_DeerwoodMember" name="DeerwoodMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_DeferredFinancingCostsandDiscountandPremiumCosts" name="DeferredFinancingCostsandDiscountandPremiumCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="sui_DeferredTaxAssetsRealEstate" name="DeferredTaxAssetsRealEstate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="sui_Derecognitionofcollateralizedrecievables" name="Derecognitionofcollateralizedrecievables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="sui_DesertHarborMember" name="DesertHarborMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_DirectorPlansMember" name="DirectorPlansMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_DisclosureofVariableInterestEntitiesTextBlock" name="DisclosureofVariableInterestEntitiesTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_DisclosureofvariableinterestentitiesAbstract" name="DisclosureofvariableinterestentitiesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_DistributionsFromAffiliate" name="DistributionsFromAffiliate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="sui_DistributionsToStockholdersOpUnitHoldersAndPreferredOpUnitHolders" name="DistributionsToStockholdersOpUnitHoldersAndPreferredOpUnitHolders" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_DriftwoodRVResortMember" name="DriftwoodRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_DunedinRVResortMember" name="DunedinRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_DuttonMillVillageMember" name="DuttonMillVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_EagleCrestMember" name="EagleCrestMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_EastForkMember" name="EastForkMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_EastVillageEstatesMember" name="EastVillageEstatesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_EffectiveIncomeTaxRateReconciliationAlternativeMinimumTaxAmount" name="EffectiveIncomeTaxRateReconciliationAlternativeMinimumTaxAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="sui_EffectiveIncomeTaxRateReconciliationAlternativeMinimumTaxPercent" name="EffectiveIncomeTaxRateReconciliationAlternativeMinimumTaxPercent" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_EffectiveIncomeTaxRateReconciliationChangeinDeferredTaxAssetsAmount" name="EffectiveIncomeTaxRateReconciliationChangeinDeferredTaxAssetsAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="sui_EffectiveIncomeTaxRateReconciliationChangeinDeferredTaxAssetsPercent" name="EffectiveIncomeTaxRateReconciliationChangeinDeferredTaxAssetsPercent" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_EgelcraftMember" name="EgelcraftMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_EllentonGardensRVResortMember" name="EllentonGardensRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_EmeraldCoastMember" name="EmeraldCoastMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedAfterThreeYears" name="EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedAfterThreeYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="sui_EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedInNextTwelveMonths" name="EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedInNextTwelveMonths" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="sui_EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedInThreeYears" name="EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedInThreeYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="sui_EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedInTwoYears" name="EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedInTwoYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_EntireNoteAbstract" name="EntireNoteAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_EquityInterests" name="EquityInterests" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="sui_EquityMethodInvestmentOwnershipPercentageUnrelatedThirdParty" name="EquityMethodInvestmentOwnershipPercentageUnrelatedThirdParty" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="sui_EquityTransactionTypeAxis" name="EquityTransactionTypeAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_EquityTransactionTypeDomain" name="EquityTransactionTypeDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_FairfieldVillageMember" name="FairfieldVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_FannieMaeFinancingMember" name="FannieMaeFinancingMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_FannieMaeFinancingTermLoanOneMember" name="FannieMaeFinancingTermLoanOneMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_FannieMaeFinancingTermLoanTwoMember" name="FannieMaeFinancingTermLoanTwoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_FarHorizons49erVillageMember" name="FarHorizons49erVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_FarmwoodVillageMember" name="FarmwoodVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_FiestaVillageMember" name="FiestaVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_FinancedSalesOfManufacturedHomes" name="FinancedSalesOfManufacturedHomes" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="sui_FinancialInstrumentsSubjecttoMandatoryRedemptionRateOfReturn" name="FinancialInstrumentsSubjecttoMandatoryRedemptionRateOfReturn" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_FinancialInstrumentsSubjecttoMandatoryRedemptionTerm" name="FinancialInstrumentsSubjecttoMandatoryRedemptionTerm" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_FinancialInstrumentsSubjecttoMandatoryRedemptionValueofSharesIssued" name="FinancialInstrumentsSubjecttoMandatoryRedemptionValueofSharesIssued" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="sui_FishermansCoveMember" name="FishermansCoveMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ForestHillMember" name="ForestHillMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ForestMeadowsMember" name="ForestMeadowsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ForestViewMember" name="ForestViewMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_FortWhaleyMember" name="FortWhaleyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ForthTathamRVResortCampgroundMember" name="ForthTathamRVResortCampgroundMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_FourSeasonsMember" name="FourSeasonsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_FreddieMacFinancingLoan1Member" name="FreddieMacFinancingLoan1Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_FreddieMacFinancingLoan2Member" name="FreddieMacFinancingLoan2Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_FreddieMacFinancingMember" name="FreddieMacFinancingMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_FrenchtownVillaDistrictMember" name="FrenchtownVillaDistrictMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_FriendlyVillageofLaHabraMember" name="FriendlyVillageofLaHabraMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_FriendlyVillageofModestoMember" name="FriendlyVillageofModestoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_FriendlyVillageofSimiMember" name="FriendlyVillageofSimiMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_FriendlyVillageofWestCovinaMember" name="FriendlyVillageofWestCovinaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_FrontierTownMember" name="FrontierTownMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_FutureLeasePaymentSubsequentPeriodsAxis" name="FutureLeasePaymentSubsequentPeriodsAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_FutureLeasePaymentSubsequentPeriodsDomain" name="FutureLeasePaymentSubsequentPeriodsDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_GTSCMember" name="GTSCMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_GeneralPartnershipAnnualDistributionRatePercent" name="GeneralPartnershipAnnualDistributionRatePercent" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="sui_GlenEllisMember" name="GlenEllisMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_GlenHavenRVResortMember" name="GlenHavenRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_GlenLaurelMember" name="GlenLaurelMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_GoldcoasterMember" name="GoldcoasterMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_GrandBayMember" name="GrandBayMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_GrandLakesMember" name="GrandLakesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_GrandMember" name="GrandMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_GrandOaksRVResortCampgroundMember" name="GrandOaksRVResortCampgroundMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_GreenCourteMember" name="GreenCourteMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_GroundLeaseMember" name="GroundLeaseMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_GroundLeasesPercentOfLandAcquired" name="GroundLeasesPercentOfLandAcquired" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_GroveBeachMember" name="GroveBeachMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_GroveRidgeRVResortMember" name="GroveRidgeRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_GrovesMember" name="GrovesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_GulfstreamHarborMember" name="GulfstreamHarborMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_GulliversLakeRVResortCampgroundMember" name="GulliversLakeRVResortCampgroundMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_GwynnsIslandMember" name="GwynnsIslandMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_HaciendadelRioMember" name="HaciendadelRioMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_HamlinMember" name="HamlinMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_HannahVillageMember" name="HannahVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_HemlocksMember" name="HemlocksMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_HeritageMember" name="HeritageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_HickoryHillsVillageMember" name="HickoryHillsVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_HiddenRidgeMember" name="HiddenRidgeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_HiddenRiverRVResortMember" name="HiddenRiverRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="sui_HidnPinesMember" name="HidnPinesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="sui_HillCountryCottageandRVResortMember" name="HillCountryCottageandRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_HillcrestMember" name="HillcrestMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_HolidayWestVillageMember" name="HolidayWestVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="sui_HollyVillageHawaiianGardensMember" name="HollyVillageHawaiianGardensMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_HomeSaleProceeds" name="HomeSaleProceeds" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="sui_HomeSalesAndHomeRentalsSegmentMember" name="HomeSalesAndHomeRentalsSegmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_HomosassaRiverRVResortMember" name="HomosassaRiverRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element id="sui_IncomelossAttributabletoCommonStockholdersAllocableToNonVestedRestrictedShares" name="IncomelossAttributabletoCommonStockholdersAllocableToNonVestedRestrictedShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="sui_IndianCreekMember" name="IndianCreekMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_IndianCreekOHMember" name="IndianCreekOHMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_IndianWellsRVResortMember" name="IndianWellsRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="sui_InstallmentNotesReceivableMember" name="InstallmentNotesReceivableMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="sui_JellystoneParkAtLurayMember" name="JellystoneParkAtLurayMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="sui_LafayettePlaceMember" name="LafayettePlaceMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="sui_LakeJulianaMember" name="LakeJulianaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="sui_LakeRudolphRVResortCampgroundMember" name="LakeRudolphRVResortCampgroundMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_LakeSanMarinoMember" name="LakeSanMarinoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_LakefrontMember" name="LakefrontMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_LakelandRVResortMember" name="LakelandRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_LakeshoreLandingsMember" name="LakeshoreLandingsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="sui_LakeviewCTMember" name="LakeviewCTMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="sui_LamplighterMember" name="LamplighterMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="sui_LaurelHeightsMember" name="LaurelHeightsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_LazyJRanchMember" name="LazyJRanchMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_LeafVerdeRVResortMember" name="LeafVerdeRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="sui_LeisurePointResortMember" name="LeisurePointResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="sui_LemonWoodMember" name="LemonWoodMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_LesseeOperatingLeaseLeaseNotYetCommencedValue" name="LesseeOperatingLeaseLeaseNotYetCommencedValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="sui_LibertyFarmsMember" name="LibertyFarmsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_LifeCompaniesMember" name="LifeCompaniesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_LincolnEstatesMember" name="LincolnEstatesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_LineOfCreditFacilityAdditionalBorrowingCapacity" name="LineOfCreditFacilityAdditionalBorrowingCapacity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="sui_LineOfCreditManufacturedHomeFloorPlanFacilityMember" name="LineOfCreditManufacturedHomeFloorPlanFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_LoanPrincipalAmortizationMember" name="LoanPrincipalAmortizationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_LongBeachRVResortCampgroundMember" name="LongBeachRVResortCampgroundMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_LongTermDebtExcludingSecuredBorrowingsFairValueDisclosure" name="LongTermDebtExcludingSecuredBorrowingsFairValueDisclosure" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="sui_LossFromCatastrophesDebrisAndTreeRemovalRepairsAndFloodingDamage" name="LossFromCatastrophesDebrisAndTreeRemovalRepairsAndFloodingDamage" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="sui_LossFromCatastrophesNet" name="LossFromCatastrophesNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_MajesticOaksRVResortMember" name="MajesticOaksRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ManufacturedHomeAndRvCommunityMember" name="ManufacturedHomeAndRvCommunityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ManufacturedHomeCommunityMember" name="ManufacturedHomeCommunityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_MapleBrookMember" name="MapleBrookMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_MaplewoodManorMember" name="MaplewoodManorMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_MarcoNaplesRVResortMember" name="MarcoNaplesRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="sui_PheasantRidgeMember" name="PheasantRidgeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_PickerelParkRVResortCampgroundMember" name="PickerelParkRVResortCampgroundMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_PinOakParcMember" name="PinOakParcMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_PineHillsMember" name="PineHillsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_PineRidgeMember" name="PineRidgeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_PineTraceMember" name="PineTraceMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_PinebrookVillageMember" name="PinebrookVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_PismoDunesMember" name="PismoDunesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_PlantationLandingsMember" name="PlantationLandingsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_PleasantLakeRVResortMember" name="PleasantLakeRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_PonyExpressMember" name="PonyExpressMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_PreferredEquityMandatorilyRedeemableMember" name="PreferredEquityMandatorilyRedeemableMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_PreferredOPUnitsDomain" name="PreferredOPUnitsDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_PreferredStockRedemptionCosts" name="PreferredStockRedemptionCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="sui_PreferredreturntoSeriesA1preferredOPunits" name="PreferredreturntoSeriesA1preferredOPunits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="sui_PrepaymentPenaltyDebt" name="PrepaymentPenaltyDebt" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_PresidentialMember" name="PresidentialMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_PrincipalReductionFromRepossessedHomes" name="PrincipalReductionFromRepossessedHomes" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_PropertiessecuringdebtMember" name="PropertiessecuringdebtMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_PropertyOperatingandMaintenanceMember" name="PropertyOperatingandMaintenanceMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_PurchaseofTangibleProperty" name="PurchaseofTangibleProperty" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ROUAbstract" name="ROUAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RainbowVillageofLargoMember" name="RainbowVillageofLargoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RainbowVillageofZepyrhillsMember" name="RainbowVillageofZepyrhillsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RainbowrvMember" name="RainbowrvMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RanchoAlipazMember" name="RanchoAlipazMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RanchoCaballeroMember" name="RanchoCaballeroMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RanchoMirageMember" name="RanchoMirageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_RatioofSharestoCommonStockDenominator" name="RatioofSharestoCommonStockDenominator" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="sui_RatioofSharestoCommonStockNumerator" name="RatioofSharestoCommonStockNumerator" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="sui_RealEstateAccumulatedDepreciationDispositionsAndOther" name="RealEstateAccumulatedDepreciationDispositionsAndOther" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RealEstateAccumulatedDepreciationEncumbrancesByGroupCategoryOneMember" name="RealEstateAccumulatedDepreciationEncumbrancesByGroupCategoryOneMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RealEstateAccumulatedDepreciationEncumbrancesByGroupCategoryTwoMember" name="RealEstateAccumulatedDepreciationEncumbrancesByGroupCategoryTwoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RealEstateAccumulatedDepreciationEncumbrancesbyGroupCategoryFiveMember" name="RealEstateAccumulatedDepreciationEncumbrancesbyGroupCategoryFiveMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RealEstateAccumulatedDepreciationEncumbrancesbyGroupCategoryFourMember" name="RealEstateAccumulatedDepreciationEncumbrancesbyGroupCategoryFourMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_RealEstateAcquisitionCosts" name="RealEstateAcquisitionCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="sui_RealEstateAndAccumulatedDepreciationAmountOfEncumbrancesForGroupOfProperties" name="RealEstateAndAccumulatedDepreciationAmountOfEncumbrancesForGroupOfProperties" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="sui_RealEstateDispositionsAndOther" name="RealEstateDispositionsAndOther" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="sui_RealEstateInvestmentPropertyLandImprovementsAndBuildings" name="RealEstateInvestmentPropertyLandImprovementsAndBuildings" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="sui_RealEstateInvestmentPropertyPolicyTextBlock" name="RealEstateInvestmentPropertyPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_RealEstateOtherAcquisitionsAndImprovements" name="RealEstateOtherAcquisitionsAndImprovements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RealPropertyOperationsSegmentMember" name="RealPropertyOperationsSegmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_ReceivableWithImputedInterestTerm" name="ReceivableWithImputedInterestTerm" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RedOaksRVResortMember" name="RedOaksRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RegencyHeightsMember" name="RegencyHeightsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_RelatedPartyTransactionEquityInterestInOfficeSpacePercentage" name="RelatedPartyTransactionEquityInterestInOfficeSpacePercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="sui_RelatedPartyTransactionsCurrentandFutureBaseRent" name="RelatedPartyTransactionsCurrentandFutureBaseRent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:decimalItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_RemeasurementOfMarketableSecurities" name="RemeasurementOfMarketableSecurities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="sui_RentalHomeRevenue" name="RentalHomeRevenue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RentalHomeRevenueMember" name="RentalHomeRevenueMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RentalpropertiesMember" name="RentalpropertiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_RepaymentofNotesandOtherReceivables" name="RepaymentofNotesandOtherReceivables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="sui_RequiredMinimumPercentOfTaxableIncomeDistributedToStockHolders" name="RequiredMinimumPercentOfTaxableIncomeDistributedToStockHolders" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ReserveatFoxCreekMember" name="ReserveatFoxCreekMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_ResidentBalancePastDuePeriod" name="ResidentBalancePastDuePeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ReturnOfCapitalMember" name="ReturnOfCapitalMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ReunionLakeMember" name="ReunionLakeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_RevenueFromHomeSales" name="RevenueFromHomeSales" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RevenueFromHomeSalesMember" name="RevenueFromHomeSalesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RezPlotMember" name="RezPlotMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RichmondMember" name="RichmondMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_RightofUseAssetObtainedinExchangeforNewOperatingLeaseLiability" name="RightofUseAssetObtainedinExchangeforNewOperatingLeaseLiability" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RiptideRVResortMarinaMember" name="RiptideRVResortMarinaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RiverHavenMember" name="RiverHavenMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RiverPinesMember" name="RiverPinesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RiverPlantationMember" name="RiverPlantationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RiverRanchMember" name="RiverRanchMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RiverRidgeMember" name="RiverRidgeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RiverRunRanchMember" name="RiverRunRanchMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RiversideClubMember" name="RiversideClubMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RockCrusherCanyonRVParkMember" name="RockCrusherCanyonRVParkMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RollingHillsMember" name="RollingHillsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RoxburyMember" name="RoxburyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RoyalCountryMember" name="RoyalCountryMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RoyalPalmVillageMember" name="RoyalPalmVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RoyalPalmsMHRVResortMember" name="RoyalPalmsMHRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RudgateClintonMember" name="RudgateClintonMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RudgateManorMember" name="RudgateManorMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_RvCommunityMember" name="RvCommunityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SacoRVResortMember" name="SacoRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SaddleOakClubMember" name="SaddleOakClubMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SaddlebrookMember" name="SaddlebrookMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SanPedroRVResortMarinaMember" name="SanPedroRVResortMarinaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SandyLakeMHRVResortMember" name="SandyLakeMHRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SaralakeEstatesMember" name="SaralakeEstatesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SavannaClubMember" name="SavannaClubMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_ScheduleOfCollateralizedLoansTableTextBlock" name="ScheduleOfCollateralizedLoansTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfFuturePeriodCostsAxis" name="ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfFuturePeriodCostsAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfFuturePeriodCostsDomain" name="ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfFuturePeriodCostsDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ScheduleOfInstallmentNotesReceivableTable" name="ScheduleOfInstallmentNotesReceivableTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_ScheduleOfInstallmentNotesReceivableTableTextBlock" name="ScheduleOfInstallmentNotesReceivableTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_ScheduleOfNotesAndOtherReceivablesTableTextBlock" name="ScheduleOfNotesAndOtherReceivablesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_ScheduleOfSharebasedCompensationCostsRelatedToUnvestedRestrictedStockTableTextBlock" name="ScheduleOfSharebasedCompensationCostsRelatedToUnvestedRestrictedStockTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_ScheduleOfTaxCharacterizationOfDividendsTableTextBlock" name="ScheduleOfTaxCharacterizationOfDividendsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ScheduleofFiniteLivedIntangibleAssetsAmortizationExpenseLineItems" name="ScheduleofFiniteLivedIntangibleAssetsAmortizationExpenseLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ScheduleofFiniteLivedIntangibleAssetsAmortizationExpenseTable" name="ScheduleofFiniteLivedIntangibleAssetsAmortizationExpenseTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_ScheduleofIntangibleAssetsAmortizationExpenseTableTextBlock" name="ScheduleofIntangibleAssetsAmortizationExpenseTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_ScheduleofSaleofCommonStockTableTextBlock" name="ScheduleofSaleofCommonStockTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ScioFarmsMember" name="ScioFarmsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SeaAirMember" name="SeaAirMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SeaBreezeResortMember" name="SeaBreezeResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SeaportRVResortMember" name="SeaportRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SeashoreRVResortMember" name="SeashoreRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SerendipityMember" name="SerendipityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SeriesA1PreferredOpUnitsMember" name="SeriesA1PreferredOpUnitsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SeriesA3PreferredOpUnitsMember" name="SeriesA3PreferredOpUnitsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SeriesA4PreferredOpUnitsMember" name="SeriesA4PreferredOpUnitsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SeriesA4PreferredStockMember" name="SeriesA4PreferredStockMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SeriesA4PreferredStockandOPUnitsMember" name="SeriesA4PreferredStockandOPUnitsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SeriesB3PreferredOPUnitsMember" name="SeriesB3PreferredOPUnitsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SeriesCpreferredOPunitsDomain" name="SeriesCpreferredOPunitsDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SeriesCpreferredOPunitsMember" name="SeriesCpreferredOPunitsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SeriesDPreferredOPUnitsMember" name="SeriesDPreferredOPUnitsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_Settlementofmembershipinterest" name="Settlementofmembershipinterest" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SettlersRestRVResortMember" name="SettlersRestRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ShadowWoodVillageMember" name="ShadowWoodVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ShadyPinesMHRVResortMember" name="ShadyPinesMHRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ShadyRoadVillasMember" name="ShadyRoadVillasMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ShareBasedCompensationArrangementsByPaymentAwardAwardTypeAndPlanNameDomain" name="ShareBasedCompensationArrangementsByPaymentAwardAwardTypeAndPlanNameDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ShareBasedCompensationOptionTypeAxis" name="ShareBasedCompensationOptionTypeAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsPercentExpectedToVest" name="SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsPercentExpectedToVest" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SharebasedCompensationAwardTrancheFiveMember" name="SharebasedCompensationAwardTrancheFiveMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SharebasedCompensationAwardTrancheFourMember" name="SharebasedCompensationAwardTrancheFourMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SharebasedCompensationAwardTrancheSixMember" name="SharebasedCompensationAwardTrancheSixMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_SharesIssuedWeightedAveragePricePerShare" name="SharesIssuedWeightedAveragePricePerShare" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="sui_SheffieldMember" name="SheffieldMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ShelbyForestMember" name="ShelbyForestMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ShelbyPropertiesMember" name="ShelbyPropertiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ShelbyWestMember" name="ShelbyWestMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ShellCreekRVResortMarinaMember" name="ShellCreekRVResortMarinaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SherkstonShoresBeachResortCampgroundMember" name="SherkstonShoresBeachResortCampgroundMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SiestaBayMember" name="SiestaBayMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SignificantAccountingPoliciesLineItems" name="SignificantAccountingPoliciesLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SignificantAccountingPoliciesTable" name="SignificantAccountingPoliciesTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SilverBirchesRVResortCampgroundMember" name="SilverBirchesRVResortCampgroundMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SilverCreekMember" name="SilverCreekMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SilverSpringsMember" name="SilverSpringsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SkyHarborMember" name="SkyHarborMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SkylineMember" name="SkylineMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SlickRockMember" name="SlickRockMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SlickrockRVResortCampgroundMember" name="SlickrockRVResortCampgroundMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SmithCreekCrossingMember" name="SmithCreekCrossingMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SouthernCharmRVResortMember" name="SouthernCharmRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SouthernHillsMember" name="SouthernHillsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SouthernPalmsMember" name="SouthernPalmsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SouthernPinesMember" name="SouthernPinesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SouthforkMember" name="SouthforkMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SouthportSpringsMember" name="SouthportSpringsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SouthsideLandingMember" name="SouthsideLandingMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SouthwoodVillageMember" name="SouthwoodVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SpanishMainMHRVResortMember" name="SpanishMainMHRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_StClairPlaceMember" name="StClairPlaceMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_StockBasedCompensationAmortizationAndForfeitures" name="StockBasedCompensationAmortizationAndForfeitures" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="sui_StockIssuedDuringPeriodValueNewIssuesSeriesA3PreferredOPUnits" name="StockIssuedDuringPeriodValueNewIssuesSeriesA3PreferredOPUnits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="sui_StockIssuedDuringPeriodValueNewIssuesSeriesA4PreferredOPUnits" name="StockIssuedDuringPeriodValueNewIssuesSeriesA4PreferredOPUnits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_StonebridgeRichfieldTownshipMiMember" name="StonebridgeRichfieldTownshipMiMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_StonebridgeSanAntonioTxMember" name="StonebridgeSanAntonioTxMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_StonebrookMember" name="StonebrookMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_StraffordMember" name="StraffordMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_StratfordLakeWinnipesaukeeSouthKOAMember" name="StratfordLakeWinnipesaukeeSouthKOAMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SummitRidgeMember" name="SummitRidgeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SunNFunRVResortMember" name="SunNFunRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SunNGRVResortsMember" name="SunNGRVResortsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SunValleyMember" name="SunValleyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SunVillaMember" name="SunVillaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SuncoastGatewayMember" name="SuncoastGatewayMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SundanceMember" name="SundanceMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SungeniaJVMember" name="SungeniaJVMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SunlakeEstatesMember" name="SunlakeEstatesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SunsetBeachResortMember" name="SunsetBeachResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SunsetHarboratCowKeyMarinaMember" name="SunsetHarboratCowKeyMarinaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SunsetLakesMember" name="SunsetLakesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SunsetLakesRVResortMember" name="SunsetLakesRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SunsetRidgeKyleTxMember" name="SunsetRidgeKyleTxMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SunsetRidgePortlandMiMember" name="SunsetRidgePortlandMiMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SwanMeadowMember" name="SwanMeadowMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SweetwaterRVResortMember" name="SweetwaterRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_SycamoreVillageMember" name="SycamoreVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TallowwoodIsleMember" name="TallowwoodIsleMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TamaracVillageMember" name="TamaracVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TampaEastMember" name="TampaEastMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TaxCharacterizationOfDividendsPaidAxis" name="TaxCharacterizationOfDividendsPaidAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TaxCharacterizationOfDividendsPaidDomain" name="TaxCharacterizationOfDividendsPaidDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_TaxWitholdingsonDistributionsfromInvestment" name="TaxWitholdingsonDistributionsfromInvestment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TelephoneServiceMember" name="TelephoneServiceMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_TemporaryEquityAcquisitionOfEquityInterests" name="TemporaryEquityAcquisitionOfEquityInterests" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="sui_TemporaryEquityDividends" name="TemporaryEquityDividends" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="sui_TemporaryEquityDividendsForTermOnePercentage" name="TemporaryEquityDividendsForTermOnePercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_TemporaryEquityDividendsForTermTwoPercentage" name="TemporaryEquityDividendsForTermTwoPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_TemporaryEquityDividendsPerShare" name="TemporaryEquityDividendsPerShare" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_TemporaryEquityIssuancePrice" name="TemporaryEquityIssuancePrice" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_TemporaryEquityRedemptionPricePerShareIncludingAccruedandUnpaidDividends" name="TemporaryEquityRedemptionPricePerShareIncludingAccruedandUnpaidDividends" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="sui_TermLoanMember" name="TermLoanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TheColonyMember" name="TheColonyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TheGroveatAltaRidgeMember" name="TheGroveatAltaRidgeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TheHamptonsMember" name="TheHamptonsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TheHideawayMember" name="TheHideawayMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TheHillsMember" name="TheHillsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TheRidgeMember" name="TheRidgeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TheSandsMember" name="TheSandsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TheValleyMember" name="TheValleyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TheVillasatCallaPointeMember" name="TheVillasatCallaPointeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ThreeGardensMember" name="ThreeGardensMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ThreeLakesMember" name="ThreeLakesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ThroughOctober312017Member" name="ThroughOctober312017Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_ThunderhillEstatesMember" name="ThunderhillEstatesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TimberRidgeMember" name="TimberRidgeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TimberlineEstatesMember" name="TimberlineEstatesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TimeBasedMember" name="TimeBasedMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TotalEquityMember" name="TotalEquityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TotalnotesandotherreceivablesDomain" name="TotalnotesandotherreceivablesDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TownCountryMobileVillageMember" name="TownCountryMobileVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TownCountryVillageMember" name="TownCountryVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TrailsideRVResortCampgroundMember" name="TrailsideRVResortCampgroundMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_TransientRVRentalRevenueRecognizedPercentage" name="TransientRVRentalRevenueRecognizedPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_TransientRVRevenue" name="TransientRVRevenue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="sui_TransientRVsiteMember" name="TransientRVsiteMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TravelersWorldRVResortMember" name="TravelersWorldRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TreetopsRVResortMember" name="TreetopsRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_TwoThousandFifteenEquityPlanMember" name="TwoThousandFifteenEquityPlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_UnitsOutstandingGeneralPartnership" name="UnitsOutstandingGeneralPartnership" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="sui_VIEasaPercentageofTotalEquity" name="VIEasaPercentageofTotalEquity" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="sui_VallecitoMember" name="VallecitoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_VariableInterestEntitiesConsolidatedTotalLiabilitiesAndStockholdersEquity" name="VariableInterestEntitiesConsolidatedTotalLiabilitiesAndStockholdersEquity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="sui_VariableInterestEntityEquityInterestsIssued" name="VariableInterestEntityEquityInterestsIssued" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="sui_VariableInterestEntityEquityInterestsIssuedFloatingRate" name="VariableInterestEntityEquityInterestsIssuedFloatingRate" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="sui_VariableInterestEntityasaPercentageofConsolidatedAssets" name="VariableInterestEntityasaPercentageofConsolidatedAssets" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="sui_VariableInterestEntityasaPercentageofConsolidatedLiabilities" name="VariableInterestEntityasaPercentageofConsolidatedLiabilities" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="sui_VerdePlazaMember" name="VerdePlazaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_VestingTypeAxis" name="VestingTypeAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_VestingTypeDomain" name="VestingTypeDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_VictorVillaMember" name="VictorVillaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_VinesRVResortMember" name="VinesRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_VistadelLagoMHRVResortMember" name="VistadelLagoMHRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_VistadelLagoMember" name="VistadelLagoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_VizcayaLakesMember" name="VizcayaLakesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WagonWheelMember" name="WagonWheelMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WaldenWoodsMember" name="WaldenWoodsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WarrenDunesVillageMember" name="WarrenDunesVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WaterOakMember" name="WaterOakMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WatersEdgeRVResortMember" name="WatersEdgeRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WaverlyShoresVillageMember" name="WaverlyShoresVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WeightedAverageCommonSharesOutstandingAbstract" name="WeightedAverageCommonSharesOutstandingAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WestVillageEstateMember" name="WestVillageEstateMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WestbrookSeniorMember" name="WestbrookSeniorMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WestbrookVillageMember" name="WestbrookVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WestsideRidgeMember" name="WestsideRidgeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WestwardHoRVResortMember" name="WestwardHoRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WestwardShoresCottagesRVResortMember" name="WestwardShoresCottagesRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WhiteLakeMember" name="WhiteLakeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WhitewaterRVResortMember" name="WhitewaterRVResortMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WildAcresMember" name="WildAcresMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WildwoodCommunityMember" name="WildwoodCommunityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WillowLakeRVResortCampgroundMember" name="WillowLakeRVResortCampgroundMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WillowbrookMember" name="WillowbrookMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WillowoodRVResortCampgroundMember" name="WillowoodRVResortCampgroundMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WindhamHillsMember" name="WindhamHillsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WindmillVillageMember" name="WindmillVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WindsorWoodsVillageMember" name="WindsorWoodsVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WineCountryMember" name="WineCountryMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_Within12MonthsMember" name="Within12MonthsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WoodhavenPlaceMember" name="WoodhavenPlaceMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WoodlakeTrailsMember" name="WoodlakeTrailsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WoodlandParkEstatesMember" name="WoodlandParkEstatesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WoodlandlakeTrailsRVResortandCampgroundMember" name="WoodlandlakeTrailsRVResortandCampgroundMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WoodlandsatChurchLakeMember" name="WoodlandsatChurchLakeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WoodsideTerraceMember" name="WoodsideTerraceMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_WymberlyMember" name="WymberlyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="sui_YankeeVillageMember" name="YankeeVillageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
</xsd:schema>
</XBRL>
