00009205222020FYfalseus-gaap:AccountingStandardsUpdate201601Memberus-gaap:AccountingStandardsUpdate201705Memberus-gaap:AccountingStandardsUpdate201712Memberus-gaap:AccountingStandardsUpdate201613Memberus-gaap:AccountingStandardsUpdate201601Memberus-gaap:AccountingStandardsUpdate201705Memberus-gaap:AccountingStandardsUpdate201712Memberus-gaap:AccountingStandardsUpdate201613Member121P5YP5YP4YP10Yone33033033033033033033033033033033033033053033053033033033033053033033033053053033033053033053033033033053033033033033033033033033053033033033033053053053033053033033033033033033033033053033033053053033033033033053033033033033033033033033033032833033033033053033033033033033033033033033033033053053033053033033033033033033033033033033033033033053053053033033033033033033033033033033053033053033053033033033032453053053053053053033033033033033053033033033033033033033053033053033033033033033053053033033033033033033033033033033053033033053053053033033053033033033033053053053033033033033033033053053033033033033000009205222020-01-012020-12-310000920522ess:EssexPortfolioL.P.Member2020-01-012020-12-31iso4217:USD00009205222020-06-30xbrli:shares00009205222021-02-1700009205222020-12-3100009205222019-12-31iso4217:USDxbrli:shares00009205222019-01-012019-12-3100009205222018-01-012018-12-310000920522us-gaap:CommonStockMember2017-12-310000920522us-gaap:AdditionalPaidInCapitalMember2017-12-310000920522us-gaap:AccumulatedDistributionsInExcessOfNetIncomeMember2017-12-310000920522us-gaap:AccumulatedOtherComprehensiveIncomeMember2017-12-310000920522us-gaap:NoncontrollingInterestMember2017-12-3100009205222017-12-310000920522us-gaap:AccumulatedDistributionsInExcessOfNetIncomeMember2018-01-012018-12-310000920522us-gaap:NoncontrollingInterestMember2018-01-012018-12-310000920522us-gaap:AccumulatedOtherComprehensiveIncomeMember2018-01-012018-12-310000920522us-gaap:CommonStockMember2018-01-012018-12-310000920522us-gaap:AdditionalPaidInCapitalMember2018-01-012018-12-310000920522us-gaap:AccountingStandardsUpdate201601Member2018-01-012018-12-310000920522us-gaap:AccumulatedDistributionsInExcessOfNetIncomeMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201601Member2017-12-310000920522us-gaap:AccumulatedOtherComprehensiveIncomeMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201601Member2017-12-310000920522srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201601Member2017-12-310000920522us-gaap:AccountingStandardsUpdate201705Member2018-01-012018-12-310000920522us-gaap:AccumulatedDistributionsInExcessOfNetIncomeMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201705Member2017-12-310000920522srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:NoncontrollingInterestMemberus-gaap:AccountingStandardsUpdate201705Member2017-12-310000920522srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201705Member2017-12-310000920522us-gaap:CommonStockMember2018-12-310000920522us-gaap:AdditionalPaidInCapitalMember2018-12-310000920522us-gaap:AccumulatedDistributionsInExcessOfNetIncomeMember2018-12-310000920522us-gaap:AccumulatedOtherComprehensiveIncomeMember2018-12-310000920522us-gaap:NoncontrollingInterestMember2018-12-3100009205222018-12-310000920522us-gaap:AccumulatedDistributionsInExcessOfNetIncomeMember2019-01-012019-12-310000920522us-gaap:NoncontrollingInterestMember2019-01-012019-12-310000920522us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-01-012019-12-310000920522us-gaap:CommonStockMember2019-01-012019-12-310000920522us-gaap:AdditionalPaidInCapitalMember2019-01-012019-12-310000920522us-gaap:AccountingStandardsUpdate201712Member2019-01-012019-12-310000920522us-gaap:AccumulatedOtherComprehensiveIncomeMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201712Member2018-12-310000920522srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:NoncontrollingInterestMemberus-gaap:AccountingStandardsUpdate201712Member2018-12-310000920522srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201712Member2018-12-310000920522us-gaap:CommonStockMember2019-12-310000920522us-gaap:AdditionalPaidInCapitalMember2019-12-310000920522us-gaap:AccumulatedDistributionsInExcessOfNetIncomeMember2019-12-310000920522us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-12-310000920522us-gaap:NoncontrollingInterestMember2019-12-310000920522us-gaap:AccumulatedDistributionsInExcessOfNetIncomeMember2020-01-012020-12-310000920522us-gaap:NoncontrollingInterestMember2020-01-012020-12-310000920522us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-01-012020-12-310000920522us-gaap:CommonStockMember2020-01-012020-12-310000920522us-gaap:AdditionalPaidInCapitalMember2020-01-012020-12-310000920522us-gaap:AccountingStandardsUpdate201613Member2020-01-012020-12-310000920522us-gaap:AccumulatedDistributionsInExcessOfNetIncomeMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2019-12-310000920522srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201613Member2019-12-310000920522us-gaap:CommonStockMember2020-12-310000920522us-gaap:AdditionalPaidInCapitalMember2020-12-310000920522us-gaap:AccumulatedDistributionsInExcessOfNetIncomeMember2020-12-310000920522us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-12-310000920522us-gaap:NoncontrollingInterestMember2020-12-310000920522ess:EssexPortfolioL.P.Member2020-12-310000920522ess:EssexPortfolioL.P.Member2019-12-310000920522us-gaap:GeneralPartnerMemberess:EssexPortfolioL.P.Member2020-12-310000920522us-gaap:GeneralPartnerMemberess:EssexPortfolioL.P.Member2019-12-310000920522ess:CommonEquityMemberus-gaap:GeneralPartnerMemberess:EssexPortfolioL.P.Member2020-12-310000920522ess:CommonEquityMemberus-gaap:GeneralPartnerMemberess:EssexPortfolioL.P.Member2019-12-310000920522us-gaap:LimitedPartnerMemberess:EssexPortfolioL.P.Member2020-12-310000920522us-gaap:LimitedPartnerMemberess:EssexPortfolioL.P.Member2019-12-310000920522ess:EssexPortfolioL.P.Member2019-01-012019-12-310000920522ess:EssexPortfolioL.P.Member2018-01-012018-12-310000920522ess:CommonEquityMemberus-gaap:GeneralPartnerMemberess:EssexPortfolioL.P.Member2017-12-310000920522ess:CommonEquityMemberus-gaap:LimitedPartnerMemberess:EssexPortfolioL.P.Member2017-12-310000920522us-gaap:AccumulatedOtherComprehensiveIncomeMemberess:EssexPortfolioL.P.Member2017-12-310000920522us-gaap:NoncontrollingInterestMemberess:EssexPortfolioL.P.Member2017-12-310000920522ess:EssexPortfolioL.P.Member2017-12-310000920522ess:CommonEquityMemberus-gaap:GeneralPartnerMemberess:EssexPortfolioL.P.Member2018-01-012018-12-310000920522ess:CommonEquityMemberus-gaap:LimitedPartnerMemberess:EssexPortfolioL.P.Member2018-01-012018-12-310000920522us-gaap:NoncontrollingInterestMemberess:EssexPortfolioL.P.Member2018-01-012018-12-310000920522us-gaap:AccumulatedOtherComprehensiveIncomeMemberess:EssexPortfolioL.P.Member2018-01-012018-12-310000920522ess:CommonEquityMemberus-gaap:AccountingStandardsUpdate201601Memberus-gaap:GeneralPartnerMemberess:EssexPortfolioL.P.Member2018-01-012018-12-310000920522ess:CommonEquityMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201601Memberus-gaap:GeneralPartnerMemberess:EssexPortfolioL.P.Member2017-12-310000920522ess:CommonEquityMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:LimitedPartnerMemberus-gaap:AccountingStandardsUpdate201601Memberess:EssexPortfolioL.P.Member2017-12-310000920522srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201601Memberus-gaap:AccumulatedOtherComprehensiveIncomeMemberess:EssexPortfolioL.P.Member2017-12-310000920522ess:CommonEquityMemberus-gaap:GeneralPartnerMemberus-gaap:AccountingStandardsUpdate201705Memberess:EssexPortfolioL.P.Member2018-01-012018-12-310000920522ess:CommonEquityMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:GeneralPartnerMemberus-gaap:AccountingStandardsUpdate201705Memberess:EssexPortfolioL.P.Member2017-12-310000920522ess:CommonEquityMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:LimitedPartnerMemberus-gaap:AccountingStandardsUpdate201705Memberess:EssexPortfolioL.P.Member2017-12-310000920522srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201705Memberess:EssexPortfolioL.P.Member2017-12-310000920522ess:PreferredEquityMemberess:EssexPortfolioL.P.Member2018-01-012018-12-310000920522ess:CommonEquityMemberus-gaap:GeneralPartnerMemberess:EssexPortfolioL.P.Member2018-12-310000920522ess:CommonEquityMemberus-gaap:LimitedPartnerMemberess:EssexPortfolioL.P.Member2018-12-310000920522us-gaap:AccumulatedOtherComprehensiveIncomeMemberess:EssexPortfolioL.P.Member2018-12-310000920522us-gaap:NoncontrollingInterestMemberess:EssexPortfolioL.P.Member2018-12-310000920522ess:EssexPortfolioL.P.Member2018-12-310000920522ess:CommonEquityMemberus-gaap:GeneralPartnerMemberess:EssexPortfolioL.P.Member2019-01-012019-12-310000920522ess:CommonEquityMemberus-gaap:LimitedPartnerMemberess:EssexPortfolioL.P.Member2019-01-012019-12-310000920522us-gaap:NoncontrollingInterestMemberess:EssexPortfolioL.P.Member2019-01-012019-12-310000920522us-gaap:AccumulatedOtherComprehensiveIncomeMemberess:EssexPortfolioL.P.Member2019-01-012019-12-310000920522ess:CommonEquityMemberus-gaap:GeneralPartnerMemberus-gaap:AccountingStandardsUpdate201712Memberess:EssexPortfolioL.P.Member2019-01-012019-12-310000920522srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201712Memberus-gaap:AccumulatedOtherComprehensiveIncomeMemberess:EssexPortfolioL.P.Member2018-12-310000920522srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201712Memberess:EssexPortfolioL.P.Member2018-12-310000920522ess:PreferredEquityMemberess:EssexPortfolioL.P.Member2019-01-012019-12-310000920522ess:CommonEquityMemberus-gaap:LimitedPartnerMemberess:EssexPortfolioL.P.Member2019-12-310000920522us-gaap:AccumulatedOtherComprehensiveIncomeMemberess:EssexPortfolioL.P.Member2019-12-310000920522us-gaap:NoncontrollingInterestMemberess:EssexPortfolioL.P.Member2019-12-310000920522ess:CommonEquityMemberus-gaap:GeneralPartnerMemberess:EssexPortfolioL.P.Member2020-01-012020-12-310000920522ess:CommonEquityMemberus-gaap:LimitedPartnerMemberess:EssexPortfolioL.P.Member2020-01-012020-12-310000920522us-gaap:NoncontrollingInterestMemberess:EssexPortfolioL.P.Member2020-01-012020-12-310000920522us-gaap:AccumulatedOtherComprehensiveIncomeMemberess:EssexPortfolioL.P.Member2020-01-012020-12-310000920522ess:CommonEquityMemberus-gaap:GeneralPartnerMemberus-gaap:AccountingStandardsUpdate201712Memberess:EssexPortfolioL.P.Member2020-01-012020-12-310000920522ess:CommonEquityMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:GeneralPartnerMemberus-gaap:AccountingStandardsUpdate201712Memberess:EssexPortfolioL.P.Member2019-12-310000920522srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201712Memberess:EssexPortfolioL.P.Member2019-12-310000920522ess:PreferredEquityMemberess:EssexPortfolioL.P.Member2020-01-012020-12-310000920522ess:CommonEquityMemberus-gaap:LimitedPartnerMemberess:EssexPortfolioL.P.Member2020-12-310000920522us-gaap:AccumulatedOtherComprehensiveIncomeMemberess:EssexPortfolioL.P.Member2020-12-310000920522us-gaap:NoncontrollingInterestMemberess:EssexPortfolioL.P.Member2020-12-31xbrli:pure0000920522ess:OperatingPartnershipMember2020-01-012020-12-31ess:apartmentess:buildingess:projectess:investment0000920522us-gaap:AccumulatedDistributionsInExcessOfNetIncomeMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2019-12-310000920522srt:MinimumMemberess:ComputerSoftwareAndEquipmentMember2020-01-012020-12-310000920522srt:MaximumMemberess:ComputerSoftwareAndEquipmentMember2020-01-012020-12-310000920522ess:InteriorUnitImprovementsMember2020-01-012020-12-310000920522srt:MinimumMemberess:FurnitureFixturesAndEquipmentMember2020-01-012020-12-310000920522srt:MaximumMemberess:FurnitureFixturesAndEquipmentMember2020-01-012020-12-310000920522ess:LandImprovementsAndCertainExteriorComponentsOfRealPropertyMember2020-01-012020-12-310000920522ess:RealEstateStructuresMember2020-01-012020-12-310000920522ess:CanadaPensionPlanInvestmentBoardMember2019-01-012019-12-310000920522ess:CanadaPensionPlanInvestmentBoardMember2019-12-310000920522us-gaap:DebtSecuritiesMember2020-12-310000920522us-gaap:DebtSecuritiesMember2020-01-012020-12-310000920522us-gaap:CommonStockMember2020-12-310000920522us-gaap:CommonStockMember2020-01-012020-12-310000920522us-gaap:CorporateDebtSecuritiesMember2020-12-310000920522us-gaap:DebtSecuritiesMember2019-12-310000920522us-gaap:DebtSecuritiesMember2019-01-012019-12-310000920522us-gaap:CommonStockMember2019-12-310000920522us-gaap:CommonStockMember2019-01-012019-12-310000920522us-gaap:USTreasurySecuritiesMember2019-12-310000920522us-gaap:CorporateDebtSecuritiesMember2019-12-310000920522us-gaap:MortgageBackedSecuritiesMember2019-12-310000920522ess:InterestAndOtherIncomeMember2020-01-012020-12-310000920522ess:InterestAndOtherIncomeMember2019-01-012019-12-310000920522us-gaap:MortgageBackedSecuritiesOtherMember2019-12-310000920522srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:MortgageBackedSecuritiesOtherMember2020-01-010000920522us-gaap:MortgageBackedSecuritiesOtherMember2020-01-012020-12-310000920522us-gaap:MortgageBackedSecuritiesOtherMember2020-12-310000920522us-gaap:MortgageBackedSecuritiesMember2020-12-3100009205222019-11-012019-11-300000920522us-gaap:CommonStockMember2020-01-012020-12-310000920522us-gaap:CommonStockMember2019-01-012019-12-310000920522us-gaap:CommonStockMember2018-01-012018-12-310000920522us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember2019-12-310000920522us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2019-12-310000920522us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember2020-01-012020-12-310000920522us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2020-01-012020-12-310000920522us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember2020-12-310000920522us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2020-12-310000920522us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMemberess:EssexPortfolioL.P.Member2019-12-310000920522us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMemberess:EssexPortfolioL.P.Member2019-12-310000920522us-gaap:AccumulatedOtherComprehensiveIncomeMemberess:EssexPortfolioL.P.Member2019-12-310000920522us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMemberess:EssexPortfolioL.P.Member2020-01-012020-12-310000920522us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMemberess:EssexPortfolioL.P.Member2020-01-012020-12-310000920522us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMemberess:EssexPortfolioL.P.Member2020-12-310000920522us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMemberess:EssexPortfolioL.P.Member2020-12-310000920522us-gaap:AccumulatedOtherComprehensiveIncomeMemberess:EssexPortfolioL.P.Member2020-12-31ess:partnershipess:unit0000920522ess:CanadianPensionPlanInvestmentBoardCPPIBorCPPSanFranciscoCAMembersrt:ApartmentBuildingMember2020-01-012020-12-310000920522ess:CanadianPensionPlanInvestmentBoardCPPIBorCPPSanFranciscoCAMembersrt:ApartmentBuildingMember2020-12-310000920522ess:CanadianPensionPlanInvestmentBoardCPPIBorCPPSanFranciscoCAMember2020-01-012020-01-310000920522ess:CanadianPensionPlanInvestmentBoardCPPIBorCPPSanFranciscoCAMembersrt:ApartmentBuildingMember2020-01-012020-01-310000920522ess:CanadianPensionPlanInvestmentBoardCPPIBorCPPSanFranciscoCAMember2020-01-310000920522us-gaap:LandAndLandImprovementsMember2020-01-012020-12-310000920522us-gaap:BuildingAndBuildingImprovementsMember2020-01-012020-12-310000920522us-gaap:PrepaidExpensesAndOtherCurrentAssetsMember2020-01-012020-12-310000920522srt:ApartmentBuildingMember2019-01-012019-12-310000920522ess:HiddenValleyMember2019-12-012019-12-310000920522ess:HiddenValleyMembersrt:ApartmentBuildingMember2019-12-012019-12-310000920522ess:HiddenValleyMember2019-12-310000920522ess:OneSouthMarketAndMuseumParkMembersrt:ApartmentBuildingMember2020-06-012020-06-300000920522ess:OneSouthMarketAndMuseumParkMember2020-06-012020-06-300000920522ess:DelanoRedmondWAMembersrt:ApartmentBuildingMember2020-07-012020-07-310000920522ess:DelanoRedmondWAMember2020-07-012020-07-310000920522ess:GlendaleCAMembersrt:ApartmentBuildingMember2020-10-012020-10-310000920522ess:GlendaleCAMember2020-10-012020-10-310000920522ess:RentalAndOtherPropertyRevenuesMemberess:SantaClaraCAMemberess:CommunitiesSoldIn2019Member2019-01-012019-12-310000920522ess:RentalAndOtherPropertyRevenuesMemberess:SantaMateoCAMemberess:CommunitiesSoldIn2019Member2019-01-012019-12-310000920522ess:SantaMateoCAMemberess:CommunitiesSoldIn2019Member2019-01-012019-12-310000920522ess:CommunitiesSoldIn2018Member2018-01-012018-12-310000920522ess:CommunitiesSoldIn2018Memberess:RentalAndOtherPropertyRevenuesMember2018-01-012018-12-310000920522ess:MembershipInterestInCPPIBMember2020-01-012020-12-310000920522ess:MembershipInterestInCPPIBMember2020-12-310000920522ess:MembershipInterestInCPPIBMember2019-12-310000920522ess:MembershipinterestinWescoIIIIIVandVMember2020-01-012020-12-310000920522ess:MembershipinterestinWescoIIIIIVandVMember2020-12-310000920522ess:MembershipinterestinWescoIIIIIVandVMember2019-12-310000920522ess:MembershipinterestinBEXAEWBEXIIBEXIIIandBEXIVMember2020-01-012020-12-310000920522ess:MembershipinterestinBEXAEWBEXIIBEXIIIandBEXIVMember2020-12-310000920522ess:MembershipinterestinBEXAEWBEXIIBEXIIIandBEXIVMember2019-12-310000920522ess:MembershipInterestInLimitedLiabilityCompanyThatOwnsAndIsDevelopingExpoMember2020-01-012020-12-310000920522ess:MembershipInterestInLimitedLiabilityCompanyThatOwnsAndIsDevelopingExpoMember2020-12-310000920522ess:MembershipInterestInLimitedLiabilityCompanyThatOwnsAndIsDevelopingExpoMember2019-12-310000920522ess:TotalOperatingCoInvestmentsMember2020-12-310000920522ess:TotalOperatingCoInvestmentsMember2019-12-310000920522ess:TotalDevelopmentCoInvestmentsMember2020-01-012020-12-310000920522ess:TotalDevelopmentCoInvestmentsMember2020-12-310000920522ess:TotalDevelopmentCoInvestmentsMember2019-12-310000920522ess:TotalPreferredInterestInvestmentsMemberus-gaap:InvestmentsInMajorityOwnedSubsidiariesMember2020-12-310000920522ess:TotalPreferredInterestInvestmentsMemberus-gaap:InvestmentsInMajorityOwnedSubsidiariesMember2019-12-310000920522ess:TotalPreferredInterestInvestmentsMember2020-12-310000920522ess:TotalPreferredInterestInvestmentsMember2019-12-310000920522ess:TotalCoInvestmentMember2020-12-310000920522ess:TotalCoInvestmentMember2019-12-310000920522ess:TotalCoInvestmentMember2020-01-012020-12-310000920522ess:TotalCoInvestmentMember2019-01-012019-12-310000920522ess:TotalCoInvestmentMember2018-01-012018-12-310000920522ess:InvestmentsWithRelatedPartiesMember2020-01-012020-12-310000920522ess:InvestmentsWithRelatedPartiesMember2019-01-012019-12-310000920522ess:InvestmentsWithRelatedPartiesMember2018-01-012018-12-310000920522ess:MesaVillageMember2020-12-310000920522ess:MesaVillageMember2020-01-012020-12-310000920522ess:OhloneMultifamilyCommunityMember2017-12-310000920522ess:OhloneMultifamilyCommunityMember2017-01-012017-12-310000920522ess:Folsom500Member2015-12-310000920522us-gaap:EquityMethodInvestmentsMember2020-01-012020-12-310000920522srt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMember2020-01-012020-12-310000920522us-gaap:EquityMethodInvestmentsMember2020-12-310000920522us-gaap:EquityMethodInvestmentsMember2019-01-012019-12-310000920522srt:MinimumMember2019-01-012019-12-310000920522srt:MaximumMember2019-01-012019-12-310000920522us-gaap:EquityMethodInvestmentsMember2018-01-012018-12-310000920522srt:MinimumMember2018-01-012018-12-310000920522srt:MaximumMember2018-01-012018-12-310000920522us-gaap:EquityMethodInvestmentsMember2018-12-310000920522ess:JointVentureThatHoldsPropertyInLosAngelesCaliforniaMember2020-03-012020-03-310000920522ess:JointVentureThatHoldsPropertyInLosAngelesCaliforniaMember2020-10-012020-12-310000920522ess:PreferredEquityInvestmentPropertyInSouthernCaliforniaMember2020-02-012020-02-290000920522ess:PreferredEquityInvestmentPropertyInSouthernCaliforniaMember2020-09-012020-09-300000920522ess:PreferredEquityInvestmentPropertyInSouthernCaliforniaMember2020-12-012020-12-31ess:property0000920522ess:PreferredEquityInvestmentPropertyInSouthernCaliforniaMember2020-12-310000920522ess:RealEstatePredevelopmentProjectsMember2020-01-012020-12-310000920522ess:RentalMember2020-01-012020-12-310000920522ess:RentalMember2019-01-012019-12-310000920522ess:RentalMember2018-01-012018-12-310000920522ess:OtherPropertyLeasingRevenueMember2020-01-012020-12-310000920522ess:OtherPropertyLeasingRevenueMember2019-01-012019-12-310000920522ess:OtherPropertyLeasingRevenueMember2018-01-012018-12-310000920522ess:SouthernCaliforniaMemberess:RentalAndOtherPropertyRevenuesMemberus-gaap:OperatingSegmentsMember2020-01-012020-12-310000920522ess:SouthernCaliforniaMemberess:RentalAndOtherPropertyRevenuesMemberus-gaap:OperatingSegmentsMember2019-01-012019-12-310000920522ess:SouthernCaliforniaMemberess:RentalAndOtherPropertyRevenuesMemberus-gaap:OperatingSegmentsMember2018-01-012018-12-310000920522ess:RentalAndOtherPropertyRevenuesMemberus-gaap:OperatingSegmentsMemberess:NorthernCaliforniaMember2020-01-012020-12-310000920522ess:RentalAndOtherPropertyRevenuesMemberus-gaap:OperatingSegmentsMemberess:NorthernCaliforniaMember2019-01-012019-12-310000920522ess:RentalAndOtherPropertyRevenuesMemberus-gaap:OperatingSegmentsMemberess:NorthernCaliforniaMember2018-01-012018-12-310000920522ess:RentalAndOtherPropertyRevenuesMemberus-gaap:OperatingSegmentsMemberess:SeattleMetroMember2020-01-012020-12-310000920522ess:RentalAndOtherPropertyRevenuesMemberus-gaap:OperatingSegmentsMemberess:SeattleMetroMember2019-01-012019-12-310000920522ess:RentalAndOtherPropertyRevenuesMemberus-gaap:OperatingSegmentsMemberess:SeattleMetroMember2018-01-012018-12-310000920522ess:RentalAndOtherPropertyRevenuesMemberus-gaap:CorporateNonSegmentMember2020-01-012020-12-310000920522ess:RentalAndOtherPropertyRevenuesMemberus-gaap:CorporateNonSegmentMember2019-01-012019-12-310000920522ess:RentalAndOtherPropertyRevenuesMemberus-gaap:CorporateNonSegmentMember2018-01-012018-12-310000920522ess:RentalAndOtherPropertyRevenuesMember2020-01-012020-12-310000920522ess:RentalAndOtherPropertyRevenuesMember2019-01-012019-12-310000920522ess:RentalAndOtherPropertyRevenuesMember2018-01-012018-12-310000920522ess:RealEstatePropertySamePropertyMemberess:RentalAndOtherPropertyRevenuesMember2020-01-012020-12-310000920522ess:RealEstatePropertySamePropertyMemberess:RentalAndOtherPropertyRevenuesMember2019-01-012019-12-310000920522ess:RealEstatePropertySamePropertyMemberess:RentalAndOtherPropertyRevenuesMember2018-01-012018-12-310000920522ess:RealEstatePropertyAcquiredMemberess:RentalAndOtherPropertyRevenuesMember2020-01-012020-12-310000920522ess:RealEstatePropertyAcquiredMemberess:RentalAndOtherPropertyRevenuesMember2019-01-012019-12-310000920522ess:RealEstatePropertyAcquiredMemberess:RentalAndOtherPropertyRevenuesMember2018-01-012018-12-310000920522ess:RealEstatePropertyDevelopmentMemberess:RentalAndOtherPropertyRevenuesMember2020-01-012020-12-310000920522ess:RealEstatePropertyDevelopmentMemberess:RentalAndOtherPropertyRevenuesMember2019-01-012019-12-310000920522ess:RealEstatePropertyDevelopmentMemberess:RentalAndOtherPropertyRevenuesMember2018-01-012018-12-310000920522ess:RentalAndOtherPropertyRevenuesMemberess:RealEstatePropertyRedevelopmentMember2020-01-012020-12-310000920522ess:RentalAndOtherPropertyRevenuesMemberess:RealEstatePropertyRedevelopmentMember2019-01-012019-12-310000920522ess:RentalAndOtherPropertyRevenuesMemberess:RealEstatePropertyRedevelopmentMember2018-01-012018-12-310000920522ess:RentalAndOtherPropertyRevenuesMemberess:RealEstatePropertyNonResidentialOtherNetMember2020-01-012020-12-310000920522ess:RentalAndOtherPropertyRevenuesMemberess:RealEstatePropertyNonResidentialOtherNetMember2019-01-012019-12-310000920522ess:RentalAndOtherPropertyRevenuesMemberess:RealEstatePropertyNonResidentialOtherNetMember2018-01-012018-12-310000920522ess:StraightLineRentConcessionMemberess:RentalAndOtherPropertyRevenuesMember2020-01-012020-12-310000920522ess:StraightLineRentConcessionMemberess:RentalAndOtherPropertyRevenuesMember2019-01-012019-12-310000920522ess:StraightLineRentConcessionMemberess:RentalAndOtherPropertyRevenuesMember2018-01-012018-12-310000920522ess:RentalAndOtherPropertyRevenuesMemberess:RealEstatePropertyNonResidentialOtherNetMember2020-12-3100009205222021-01-012020-12-3100009205222022-01-012020-12-310000920522ess:SecuredNoteReceivable9.00InterestRateDueMay2021Member2020-01-012020-12-310000920522ess:SecuredNoteReceivable9.00InterestRateDueMay2021Member2020-12-310000920522ess:SecuredNoteReceivable9.00InterestRateDueMay2021Member2019-12-310000920522ess:SecuredNoteReceivable9.90InterestRateDueNovember2019Member2020-01-012020-12-310000920522ess:SecuredNoteReceivable9.90InterestRateDueNovember2019Member2020-12-310000920522ess:SecuredNoteReceivable9.90InterestRateDueNovember2019Member2019-12-310000920522ess:RelatedPartyBridgeLoansOnPropertyAcquiredByWescoVMember2020-12-310000920522ess:RelatedPartyBridgeLoansOnPropertyAcquiredByWescoVMember2019-12-310000920522ess:SecuredNoteReceivable1050InterestRateDueFebruary2023Member2020-01-012020-12-310000920522ess:SecuredNoteReceivable1050InterestRateDueFebruary2023Member2020-12-310000920522ess:SecuredNoteReceivable1050InterestRateDueFebruary2023Member2019-12-310000920522ess:SecuredNoteReceivable11.00InterestRateDueOctober2023Member2020-01-012020-12-310000920522ess:SecuredNoteReceivable11.00InterestRateDueOctober2023Member2020-12-310000920522ess:SecuredNoteReceivable11.00InterestRateDueOctober2023Member2019-12-310000920522ess:SecuredNoteReceivable900InterestRateDueDecember2023Member2020-01-012020-12-310000920522ess:SecuredNoteReceivable900InterestRateDueDecember2023Member2020-12-310000920522ess:SecuredNoteReceivable900InterestRateDueDecember2023Member2019-12-310000920522ess:SecuredNoteReceivable1150InterestRateDueNovember2024Member2020-01-012020-12-310000920522ess:SecuredNoteReceivable1150InterestRateDueNovember2024Member2020-12-310000920522ess:SecuredNoteReceivable1150InterestRateDueNovember2024Member2019-12-310000920522us-gaap:NotesReceivableMember2020-12-310000920522us-gaap:NotesReceivableMember2019-12-310000920522ess:StraightLineRentReceivableMember2020-12-310000920522ess:StraightLineRentReceivableMember2019-12-310000920522ess:OtherReceivablesMember2020-12-310000920522ess:OtherReceivablesMember2019-12-310000920522ess:SecuredNoteReceivable9.00InterestRateDueMay2021Membersrt:AffiliatedEntityMember2020-01-012020-01-310000920522ess:RelatedPartyBridgeLoansOnPropertyAcquiredByWescoVMembersrt:AffiliatedEntityMember2020-01-012020-01-310000920522ess:NotesReceivableMezzanineLoansMember2019-12-310000920522ess:NotesReceivableBridgeLoanMember2019-12-310000920522ess:NotesReceivableMezzanineAndBridgeLoansMember2019-12-310000920522srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberess:NotesReceivableMezzanineLoansMember2019-12-310000920522srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberess:NotesReceivableBridgeLoanMember2019-12-310000920522srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberess:NotesReceivableMezzanineAndBridgeLoansMember2019-12-310000920522ess:NotesReceivableMezzanineLoansMember2020-01-012020-12-310000920522ess:NotesReceivableBridgeLoanMember2020-01-012020-12-310000920522ess:NotesReceivableMezzanineAndBridgeLoansMember2020-01-012020-12-310000920522ess:NotesReceivableMezzanineLoansMember2020-12-310000920522ess:NotesReceivableBridgeLoanMember2020-12-310000920522ess:NotesReceivableMezzanineAndBridgeLoansMember2020-12-310000920522ess:MarcusAndMillichampCompanyTmmcAffiliateMemberess:DispositionOfMultifamilyPropertiesMember2020-01-012020-12-310000920522ess:MarcusAndMillichampCompanyTmmcAffiliateMemberess:DispositionOfMultifamilyPropertiesMember2018-01-012018-12-310000920522ess:MarcusAndMillichampCompanyTmmcAffiliateMemberess:DispositionOfMultifamilyPropertiesMember2019-01-012019-12-310000920522srt:AffiliatedEntityMember2020-12-310000920522srt:AffiliatedEntityMember2019-12-310000920522ess:MarcusAndMillichampCompanyTmmcAffiliateMemberess:SecuredNoteReceivable9.5InterestRateDueOctober2019Member2016-11-300000920522ess:RelatedPartyBridgeLoansOnPropertyAcquiredByWescoVMembersrt:AffiliatedEntityMember2019-11-300000920522ess:RelatedPartyBridgeLoansOnPropertyAcquiredByWescoVMembersrt:AffiliatedEntityMember2019-11-012019-11-300000920522ess:RelatedPartyBridgeLoansOnPropertyAcquiredByWescoVMembersrt:AffiliatedEntityMember2019-08-310000920522ess:RelatedPartyBridgeLoansOnPropertyAcquiredByWescoVMembersrt:AffiliatedEntityMember2019-08-012019-08-310000920522srt:AffiliatedEntityMemberess:RelatedPartyBridgeLoanonPropertyAcquiredByBexIvMember2019-08-310000920522srt:AffiliatedEntityMemberess:RelatedPartyBridgeLoanonPropertyAcquiredByBexIvMember2019-08-012019-08-310000920522ess:BrioWalnutCreekCaliforniaMember2019-06-012019-06-300000920522ess:MultifamilyDevelopmentInMountainViewCaliforniaMembersrt:AffiliatedEntityMember2019-02-012019-02-280000920522srt:AffiliatedEntityMemberess:HomeCommunityDevelopmentinBurlingameCaliforniaMember2018-10-012018-10-310000920522ess:ApartmentHomeCommunityInVenturaCaliforniaMember2018-05-310000920522ess:ApartmentHomeCommunityInVenturaCaliforniaMember2018-05-012018-05-310000920522ess:ApartmentHomeCommunityInVenturaCaliforniaMember2018-05-012020-12-310000920522ess:MembershipInterestInSageAtCupertinoMember2017-03-310000920522ess:MembershipInterestInSageAtCupertinoMember2017-03-012017-03-310000920522us-gaap:LimitedLiabilityCompanyMember2015-01-012015-12-3100009205222017-01-012017-12-310000920522ess:FixedRateBondOneMember2020-12-310000920522ess:FixedRateBondOneMember2019-12-310000920522ess:FixedRateBondOneMember2020-01-012020-12-310000920522us-gaap:CarryingReportedAmountFairValueDisclosureMemberus-gaap:LoansPayableMember2020-12-310000920522us-gaap:CarryingReportedAmountFairValueDisclosureMemberus-gaap:LoansPayableMember2019-12-310000920522us-gaap:LoansPayableMember2020-01-012020-12-310000920522ess:FixedRateBondTwoMember2020-12-310000920522ess:FixedRateBondTwoMember2019-12-310000920522ess:FixedRateBondTwoMember2020-01-012020-12-310000920522ess:UnsecuredLineOfCreditMember2020-12-310000920522ess:UnsecuredLineOfCreditMember2019-12-310000920522us-gaap:LoansPayableMember2020-12-310000920522us-gaap:LoansPayableMember2019-12-310000920522us-gaap:UnsecuredDebtMember2020-12-310000920522us-gaap:UnsecuredDebtMember2019-12-31ess:line_of_credit0000920522us-gaap:LineOfCreditMember2020-12-310000920522ess:UnsecuredLineOfCreditMemberus-gaap:LineOfCreditMember2020-12-310000920522ess:UnsecuredLineOfCreditMemberus-gaap:LineOfCreditMember2019-12-310000920522ess:UnsecuredBonds427Member2020-12-310000920522ess:UnsecuredBonds427Member2019-12-310000920522ess:UnsecuredBonds430Member2020-12-310000920522ess:UnsecuredBonds430Member2019-12-310000920522ess:UnsecuredBonds437Member2020-12-310000920522ess:UnsecuredBonds437Member2019-12-310000920522ess:February2022Memberus-gaap:LoansPayableMember2020-12-310000920522ess:April2021Memberus-gaap:LoansPayableMember2020-12-31ess:extension0000920522ess:April2021Memberus-gaap:LoansPayableMember2020-01-012020-12-31ess:instrument0000920522us-gaap:InterestRateSwapMemberus-gaap:LoansPayableMember2020-12-310000920522us-gaap:InterestRateSwapMemberus-gaap:LoansPayableMember2020-01-012020-12-310000920522us-gaap:InterestRateSwapMemberess:VariableTermLoanTrancheOneMemberus-gaap:LoansPayableMember2020-12-310000920522us-gaap:SeniorNotesMemberess:UnsecuredBonds2650DueMarch2032Memberess:EssexPortfolioL.P.Member2020-02-290000920522us-gaap:SeniorNotesMemberess:UnsecuredBonds2650DueMarch2032Memberess:EssexPortfolioL.P.Member2020-01-012020-03-310000920522us-gaap:SeniorNotesMemberess:UnsecuredBonds2650DueMarch2032Member2020-06-300000920522us-gaap:SeniorNotesMemberess:UnsecuredBonds2650DueMarch2032Member2020-06-012020-06-300000920522us-gaap:SeniorNotesMemberess:UnsecuredBonds2650DueMarch2032Member2020-12-310000920522ess:TermLoanMember2020-04-300000920522ess:TermLoanMember2020-04-012020-04-300000920522us-gaap:LondonInterbankOfferedRateLIBORMemberess:TermLoanMember2020-04-012020-04-300000920522us-gaap:SeniorNotesMemberess:EssexPortfolioL.P.Member2020-08-310000920522ess:UnsecuredBonds1650DueJanuary2031Memberus-gaap:SeniorNotesMemberess:EssexPortfolioL.P.Member2020-08-310000920522ess:UnsecuredBonds2650DueSeptember2050Memberus-gaap:SeniorNotesMemberess:EssexPortfolioL.P.Member2020-08-310000920522ess:UnsecuredBonds1650DueJanuary2031Memberus-gaap:SeniorNotesMember2020-08-310000920522ess:UnsecuredBonds2650DueSeptember2050Memberus-gaap:SeniorNotesMember2020-08-310000920522ess:UnsecuredBonds3625Memberus-gaap:SeniorNotesMember2020-08-310000920522ess:UnsecuredBonds1650DueJanuary2031Memberus-gaap:SeniorNotesMemberess:EssexPortfolioL.P.Member2020-12-310000920522ess:UnsecuredBonds2650DueSeptember2050Memberus-gaap:SeniorNotesMemberess:EssexPortfolioL.P.Member2020-12-310000920522us-gaap:SeniorNotesMemberess:UnsecuredBonds3.000DueJanuary2030Member2019-08-310000920522us-gaap:SeniorNotesMemberess:UnsecuredBonds3.000DueJanuary2030Member2019-10-310000920522us-gaap:SeniorNotesMemberess:UnsecuredBonds3.000DueJanuary2030Member2020-12-310000920522us-gaap:SeniorNotesMemberess:UnsecuredBonds3.000DueJanuary2030Member2019-12-310000920522ess:UnsecuredBonds4.000DueMarch2029Memberus-gaap:SeniorNotesMember2019-02-280000920522ess:UnsecuredBonds4.000DueMarch2029Memberus-gaap:SeniorNotesMember2019-03-310000920522ess:UnsecuredBonds4.000DueMarch2029Memberus-gaap:SeniorNotesMember2020-12-310000920522ess:UnsecuredBonds4.000DueMarch2029Memberus-gaap:SeniorNotesMember2019-12-310000920522ess:UnsecuredBonds4.5DueMay2048Memberus-gaap:SeniorNotesMember2018-03-310000920522ess:UnsecuredBonds4.5DueMay2048Memberus-gaap:SeniorNotesMember2020-12-310000920522ess:UnsecuredBonds4.5DueMay2048Memberus-gaap:SeniorNotesMember2019-12-310000920522ess:UnsecuredBonds3.625DueMay2027Memberus-gaap:SeniorNotesMember2017-04-300000920522ess:UnsecuredBonds3.625DueMay2027Memberus-gaap:SeniorNotesMember2020-12-310000920522ess:UnsecuredBonds3.625DueMay2027Memberus-gaap:SeniorNotesMember2019-12-310000920522ess:UnsecuredBonds3.375DueApril2026Member2020-12-310000920522ess:UnsecuredBonds3.375DueApril2026Memberus-gaap:SeniorNotesMember2020-12-310000920522ess:UnsecuredBonds3.375DueApril2026Memberus-gaap:SeniorNotesMember2016-04-300000920522ess:UnsecuredBonds3.375DueApril2026Memberus-gaap:SeniorNotesMember2019-12-310000920522ess:SeniorUnsecuredNotesMaturingApril12025Memberus-gaap:UnsecuredDebtMember2015-03-310000920522ess:SeniorUnsecuredNotesMaturingApril12025Memberus-gaap:UnsecuredDebtMember2020-12-310000920522ess:SeniorUnsecuredNotesMaturingApril12025Memberus-gaap:UnsecuredDebtMember2019-12-310000920522ess:BrePropertiesIncMemberus-gaap:SeniorNotesMember2014-04-300000920522ess:UnsecuredBonds5.500Memberus-gaap:SeniorNotesMember2014-04-300000920522us-gaap:SeniorNotesMemberess:UnsecuredBonds5.200Member2020-12-310000920522us-gaap:SeniorNotesMemberess:UnsecuredBonds3.375Member2020-12-310000920522ess:BrePropertiesIncMemberus-gaap:SeniorNotesMember2020-12-310000920522ess:BrePropertiesIncMemberus-gaap:SeniorNotesMember2019-12-310000920522ess:UnsecuredBonds5.500Memberus-gaap:SeniorNotesMember2017-03-310000920522ess:UnsecuredBonds3.875Memberus-gaap:SeniorNotesMember2014-04-300000920522ess:UnsecuredBonds3.875Memberus-gaap:SeniorNotesMember2020-12-310000920522ess:UnsecuredBonds3.875Memberus-gaap:SeniorNotesMember2019-12-310000920522ess:UnsecuredBonds325Memberus-gaap:SeniorNotesMember2013-04-012013-04-300000920522ess:UnsecuredBonds325Memberus-gaap:SeniorNotesMember2013-04-300000920522ess:UnsecuredBonds325Memberus-gaap:SeniorNotesMember2020-12-310000920522ess:UnsecuredBonds325Memberus-gaap:SeniorNotesMember2019-12-310000920522ess:UnsecuredBonds5.200Member2020-12-310000920522ess:UnsecuredBonds5.200Member2019-12-310000920522ess:UnsecuredBonds3625Member2020-12-310000920522ess:UnsecuredBonds3625Member2019-12-310000920522ess:UnsecuredBonds3625Memberus-gaap:SeniorNotesMember2020-12-310000920522ess:UnsecuredBonds3.375Member2020-12-310000920522ess:UnsecuredBonds3.375Member2019-12-310000920522ess:UnsecuredBonds325Member2020-12-310000920522ess:UnsecuredBonds325Member2019-12-310000920522ess:UnsecuredBonds3.875Member2020-12-310000920522ess:UnsecuredBonds3.875Member2019-12-310000920522ess:UnsecuredBonds3.500Member2020-12-310000920522ess:UnsecuredBonds3.500Member2019-12-310000920522us-gaap:SeniorNotesMemberess:UnsecuredBonds3.500Member2020-12-310000920522ess:UnsecuredBonds3.375DueApril2026Member2019-12-310000920522ess:UnsecuredBonds3.625DueMay2027Member2020-12-310000920522ess:UnsecuredBonds3.625DueMay2027Member2019-12-310000920522ess:UnsecuredBonds4.000DueMarch2029Member2020-12-310000920522ess:UnsecuredBonds4.000DueMarch2029Member2019-12-310000920522ess:UnsecuredBonds3.000DueJanuary2030Member2020-12-310000920522ess:UnsecuredBonds3.000DueJanuary2030Member2019-12-310000920522ess:UnsecuredBonds1650DueJanuary2031Member2020-12-310000920522ess:UnsecuredBonds1650DueJanuary2031Member2019-12-310000920522ess:UnsecuredBonds1650DueJanuary2031Memberus-gaap:SeniorNotesMember2020-12-310000920522ess:UnsecuredBonds2650DueMarch2032Member2020-12-310000920522ess:UnsecuredBonds2650DueMarch2032Member2019-12-310000920522ess:UnsecuredBonds4.5DueMay2048Member2020-12-310000920522ess:UnsecuredBonds4.5DueMay2048Member2019-12-310000920522ess:UnsecuredBonds2650DueSeptember2050Member2020-12-310000920522ess:UnsecuredBonds2650DueSeptember2050Member2019-12-310000920522ess:UnsecuredBonds2650DueSeptember2050Memberus-gaap:SeniorNotesMember2020-12-310000920522us-gaap:LineOfCreditMemberess:WorkingCapitalUnsecuredLineOfCreditMember2020-12-310000920522ess:UnsecuredLineOfCreditMemberus-gaap:LondonInterbankOfferedRateLIBORMemberus-gaap:LineOfCreditMember2020-01-012020-12-310000920522ess:UnsecuredLineOfCreditMemberess:LineOfCreditWorkingCapitalMember2019-12-310000920522ess:UnsecuredLineOfCreditMemberess:LineOfCreditWorkingCapitalMember2020-12-310000920522ess:LineOfCreditWorkingCapitalMemberus-gaap:LineOfCreditMember2020-12-310000920522ess:MortgageNotesPayableMember2020-12-310000920522ess:MortgageNotesPayableMember2019-12-310000920522ess:MultifamilyHousingMortgageRevenueBondsMember2020-12-310000920522ess:MultifamilyHousingMortgageRevenueBondsMember2019-12-310000920522us-gaap:SecuredDebtMember2020-12-310000920522ess:MortgageNotesPayableMemberess:TotalReturnSwapCallableMemberus-gaap:NondesignatedMember2020-12-310000920522ess:MultifamilyHousingMortgageRevenueBondsMember2020-01-012020-12-310000920522us-gaap:SecuredDebtMember2019-12-310000920522ess:SecuredDeedsOfTrustMember2020-12-310000920522ess:SecuredDeedsOfTrustMember2019-12-310000920522ess:MortgageNotesPayableMember2020-01-012020-12-310000920522us-gaap:LoansPayableMember2016-10-310000920522us-gaap:LoansPayableMember2016-11-300000920522us-gaap:LoansPayableMember2016-11-012016-11-300000920522us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMember2016-12-310000920522us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMember2017-12-310000920522us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000920522us-gaap:InterestRateSwapMemberus-gaap:LoansPayableMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000920522us-gaap:InterestRateCapMemberus-gaap:NondesignatedMember2020-12-310000920522us-gaap:InterestRateCapMemberus-gaap:NondesignatedMember2019-12-310000920522us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMember2019-12-310000920522us-gaap:InterestRateSwapMemberus-gaap:PrepaidExpensesAndOtherCurrentAssetsMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000920522us-gaap:InterestRateSwapMemberus-gaap:PrepaidExpensesAndOtherCurrentAssetsMemberus-gaap:DesignatedAsHedgingInstrumentMember2019-12-310000920522us-gaap:DesignatedAsHedgingInstrumentMember2020-01-012020-12-310000920522us-gaap:DesignatedAsHedgingInstrumentMember2019-01-012019-12-310000920522us-gaap:DesignatedAsHedgingInstrumentMember2018-01-012018-12-310000920522ess:TotalReturnSwapCallableMemberus-gaap:NondesignatedMember2020-12-310000920522ess:TotalReturnSwapCallableMemberess:MortgageNotesPayableRealEstateHeldForSaleMemberus-gaap:NondesignatedMember2020-12-310000920522us-gaap:TotalReturnSwapMemberus-gaap:NondesignatedMember2020-12-310000920522us-gaap:NondesignatedMember2020-01-012020-12-310000920522us-gaap:NondesignatedMember2019-01-012019-12-310000920522us-gaap:NondesignatedMember2018-01-012018-12-310000920522srt:MinimumMember2020-12-310000920522srt:MaximumMember2020-12-310000920522ess:OperatingLeaseAssetsMember2020-12-310000920522ess:OperatingLeaseAssetsMember2019-12-310000920522ess:OperatingLeaseLiabilitiesMember2020-12-310000920522ess:OperatingLeaseLiabilitiesMember2019-12-310000920522ess:ATMProgram2018Member2018-09-300000920522ess:ATMProgram2018Member2019-01-012019-12-310000920522ess:ATMProgram2018Member2019-12-310000920522ess:ATMProgram2018Member2020-12-310000920522ess:OperatingPartnershipUnitsMember2020-12-310000920522ess:OperatingPartnershipUnitsMember2019-12-310000920522ess:LongTermIncentivePlan2014UnitsMember2020-12-310000920522ess:LongTermIncentivePlan2014UnitsMember2019-12-310000920522us-gaap:EmployeeStockOptionMember2020-01-012020-12-310000920522us-gaap:EmployeeStockOptionMember2019-01-012019-12-310000920522us-gaap:EmployeeStockOptionMember2018-01-012018-12-310000920522ess:DownREITUnitsMember2020-01-012020-12-310000920522ess:DownREITUnitsMember2019-01-012019-12-310000920522ess:DownREITUnitsMember2018-01-012018-12-310000920522ess:ConvertibleLimitedPartnershipUnitsMember2020-01-012020-12-310000920522ess:ConvertibleLimitedPartnershipUnitsMember2019-01-012019-12-310000920522ess:ConvertibleLimitedPartnershipUnitsMember2018-01-012018-12-310000920522us-gaap:EmployeeStockOptionMemberess:EssexPortfolioL.P.Member2020-01-012020-12-310000920522us-gaap:EmployeeStockOptionMemberess:EssexPortfolioL.P.Member2019-01-012019-12-310000920522us-gaap:EmployeeStockOptionMemberess:EssexPortfolioL.P.Member2018-01-012018-12-310000920522ess:DownREITUnitsMemberess:EssexPortfolioL.P.Member2020-01-012020-12-310000920522ess:DownREITUnitsMemberess:EssexPortfolioL.P.Member2019-01-012019-12-310000920522ess:DownREITUnitsMemberess:EssexPortfolioL.P.Member2018-01-012018-12-3100009205222018-05-310000920522us-gaap:EmployeeStockOptionMember2020-01-012020-12-310000920522us-gaap:EmployeeStockOptionMember2019-01-012019-12-310000920522us-gaap:EmployeeStockOptionMember2018-01-012018-12-310000920522us-gaap:EmployeeStockOptionMember2020-12-310000920522us-gaap:RestrictedStockMember2019-12-310000920522us-gaap:RestrictedStockMember2018-12-310000920522us-gaap:RestrictedStockMember2017-12-310000920522us-gaap:RestrictedStockMember2020-01-012020-12-310000920522us-gaap:RestrictedStockMember2019-01-012019-12-310000920522us-gaap:RestrictedStockMember2018-01-012018-12-310000920522us-gaap:RestrictedStockMember2020-12-310000920522ess:A2015LTIPUnitsMember2014-12-092014-12-090000920522ess:A2015LTIPUnitsMember2014-12-092015-12-090000920522ess:A2015LTIPUnitsMember2020-01-012020-12-310000920522ess:SeriesZIncentiveUnitsMember2013-12-012013-12-310000920522ess:LongTermIncentivePlan2014UnitsMember2013-12-012013-12-310000920522ess:LongTermIncentivePlan2014UnitsMember2020-01-012020-12-310000920522srt:MinimumMemberess:SeriesZIncentiveUnitsMember2020-01-012020-12-310000920522srt:MaximumMemberess:SeriesZIncentiveUnitsMember2020-01-012020-12-310000920522ess:SeriesZIncentiveUnitsMember2010-01-012011-12-310000920522ess:LongTermIncentivePlan2014UnitsMember2010-01-012011-12-310000920522srt:MinimumMemberess:SeriesZIncentiveUnitsMember2010-01-012011-12-310000920522srt:MaximumMemberess:SeriesZIncentiveUnitsMember2010-01-012011-12-310000920522ess:LongTermIncentivePlanZUnitsandLTIPUnitsMember2020-01-012020-12-310000920522ess:LongTermIncentivePlanZUnitsandLTIPUnitsMember2019-01-012019-12-310000920522ess:LongTermIncentivePlanZUnitsandLTIPUnitsMember2018-01-012018-12-310000920522ess:LongTermIncentivePlanZUnitsandLTIPUnitsMember2020-12-310000920522ess:LongTermIncentivePlanZUnitsandLTIPUnitsMember2017-12-310000920522ess:LongTermIncentivePlanZUnitsandLTIPUnitsMember2017-01-012017-12-310000920522ess:LongTermIncentivePlanZUnitsandLTIPUnitsMember2018-12-310000920522ess:LongTermIncentivePlanZUnitsandLTIPUnitsMember2019-12-31ess:segment0000920522ess:SouthernCaliforniaMemberus-gaap:OperatingSegmentsMember2020-01-012020-12-310000920522ess:SouthernCaliforniaMemberus-gaap:OperatingSegmentsMember2019-01-012019-12-310000920522ess:SouthernCaliforniaMemberus-gaap:OperatingSegmentsMember2018-01-012018-12-310000920522us-gaap:OperatingSegmentsMemberess:NorthernCaliforniaMember2020-01-012020-12-310000920522us-gaap:OperatingSegmentsMemberess:NorthernCaliforniaMember2019-01-012019-12-310000920522us-gaap:OperatingSegmentsMemberess:NorthernCaliforniaMember2018-01-012018-12-310000920522us-gaap:OperatingSegmentsMemberess:SeattleMetroMember2020-01-012020-12-310000920522us-gaap:OperatingSegmentsMemberess:SeattleMetroMember2019-01-012019-12-310000920522us-gaap:OperatingSegmentsMemberess:SeattleMetroMember2018-01-012018-12-310000920522us-gaap:CorporateNonSegmentMember2020-01-012020-12-310000920522us-gaap:CorporateNonSegmentMember2019-01-012019-12-310000920522us-gaap:CorporateNonSegmentMember2018-01-012018-12-310000920522ess:ManagementAndOtherFeesFromAffiliatesIncomeMember2020-01-012020-12-310000920522ess:ManagementAndOtherFeesFromAffiliatesIncomeMember2019-01-012019-12-310000920522ess:ManagementAndOtherFeesFromAffiliatesIncomeMember2018-01-012018-12-310000920522ess:SouthernCaliforniaMemberus-gaap:OperatingSegmentsMember2020-12-310000920522ess:SouthernCaliforniaMemberus-gaap:OperatingSegmentsMember2019-12-310000920522us-gaap:OperatingSegmentsMemberess:NorthernCaliforniaMember2020-12-310000920522us-gaap:OperatingSegmentsMemberess:NorthernCaliforniaMember2019-12-310000920522us-gaap:OperatingSegmentsMemberess:SeattleMetroMember2020-12-310000920522us-gaap:OperatingSegmentsMemberess:SeattleMetroMember2019-12-310000920522us-gaap:CorporateNonSegmentMember2020-12-310000920522us-gaap:CorporateNonSegmentMember2019-12-310000920522ess:PacificWesternInsuranceLLCMember2020-12-310000920522us-gaap:SubsequentEventMemberess:UnsecuredBonds430Member2021-02-012021-02-280000920522us-gaap:SubsequentEventMemberess:UnsecuredBonds430Member2021-02-280000920522ess:EncumberedApartmentCommunitiesMemberess:BelmontStationMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMemberess:BelmontStationMember2020-12-310000920522ess:EncumberedApartmentCommunitiesMemberess:BrioMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMemberess:BrioMember2020-12-310000920522ess:EncumberedApartmentCommunitiesMemberess:Form15Member2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMemberess:Form15Member2020-12-310000920522ess:FountainParkMemberess:EncumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:FountainParkMemberess:EncumberedApartmentCommunitiesMember2020-12-310000920522ess:HighridgeMemberess:EncumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:HighridgeMemberess:EncumberedApartmentCommunitiesMember2020-12-310000920522ess:EncumberedApartmentCommunitiesMemberess:MagnoliaSquareMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMemberess:MagnoliaSquareMember2020-12-310000920522ess:EncumberedApartmentCommunitiesMemberess:MarquisMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMemberess:MarquisMember2020-12-310000920522ess:EncumberedApartmentCommunitiesMemberess:MembershipInterestInSageAtCupertinoMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMemberess:MembershipInterestInSageAtCupertinoMember2020-12-310000920522ess:EncumberedApartmentCommunitiesMemberess:BarkleyMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMemberess:BarkleyMember2020-12-310000920522ess:EncumberedApartmentCommunitiesMemberess:TheDylanMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMemberess:TheDylanMember2020-12-310000920522ess:EncumberedApartmentCommunitiesMemberess:TheHuxleyMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMemberess:TheHuxleyMember2020-12-310000920522ess:EncumberedApartmentCommunitiesMemberess:TownshipMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMemberess:TownshipMember2020-12-310000920522ess:EncumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:AgoraMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:AgoraMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:AlessioMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:AlessioMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:AllegroMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:AllegroMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:AllureMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:AllureMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:AlpineVillageMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:AlpineVillageMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:AnaviaMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:AnaviaMember2020-12-310000920522ess:AnnalieseMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:AnnalieseMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ApexMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ApexMember2020-12-310000920522ess:AquaatMarinaDelReyMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:AquaatMarinaDelReyMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:AscentMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:AscentMember2020-12-310000920522ess:AshtonShermanVillageMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:AshtonShermanVillageMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:AvantMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:AvantMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:Avenue64Member2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:Avenue64Member2020-12-310000920522ess:AviaraMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:AviaraMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:AvondaleAtWarnerCenterMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:AvondaleAtWarnerCenterMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BelAirMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BelAirMember2020-12-310000920522ess:BelcarraMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:BelcarraMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:BellaVillagioMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:BellaVillagioMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BellCentreMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BellCentreMember2020-12-310000920522ess:BelleriveMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:BelleriveMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BelmontTerraceMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BelmontTerraceMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BennettLoftsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BennettLoftsMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BernardoCrestMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BernardoCrestMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BonitaCedarsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BonitaCedarsMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BoulevardMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BoulevardMember2020-12-310000920522ess:BrooksideOaksMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:BrooksideOaksMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BridleTrailsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BridleTrailsMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BrightonRidgeMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BrightonRidgeMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BristolCommonsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BristolCommonsMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BunkerHillMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BunkerHillMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CamarilloOaksMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CamarilloOaksMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CambridgeParkMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CambridgeParkMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CaminoRuizSquareMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CaminoRuizSquareMember2020-12-310000920522ess:CanyonOaksMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:CanyonOaksMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:CanyonPointeMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:CanyonPointeMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:CapriAtSunnyHillsMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:CapriAtSunnyHillsMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CarmelCreekMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CarmelCreekMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CarnelLandingMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CarnelLandingMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CarnelSummitMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CarnelSummitMember2020-12-310000920522ess:CastleCreekMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:CastleCreekMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CatalinaGardensMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CatalinaGardensMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CbcApartmentsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CbcApartmentsMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CedarTerraceMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CedarTerraceMember2020-12-310000920522ess:CentrepointeBluffsIiMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:CentrepointeBluffsIiMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ChestnutStreetMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ChestnutStreetMember2020-12-310000920522ess:CityViewMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:CityViewMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CollinsOnPineMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CollinsOnPineMember2020-12-310000920522ess:ConnollyStationMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:ConnollyStationMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:CorbellaAtJuanitaBayMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:CorbellaAtJuanitaBayMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CortesiaAtRanchoSantaMargaritaMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CortesiaAtRanchoSantaMargaritaMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CountryVillasMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CountryVillasMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CourtyardOffMainMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CourtyardOffMainMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CrowCanyonMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CrowCanyonMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:DeerValleyMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:DeerValleyMember2020-12-310000920522ess:DevonshireMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:DevonshireMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:DomaineMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:DomaineMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ElevationMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ElevationMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:EllingtonatBellevueMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:EllingtonatBellevueMember2020-12-310000920522ess:EmeraldPointeMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:EmeraldPointeMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:EmeraldRidgeNorthMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:EmeraldRidgeNorthMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:EmersonValleyVillageMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:EmersonValleyVillageMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:EmmeMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:EmmeMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:EnsoMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:EnsoMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:EpicMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:EpicMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:EsplanadeMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:EsplanadeMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:EssexSkylineAtMacauthurPlaceMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:EssexSkylineAtMacauthurPlaceMember2020-12-310000920522ess:EvergreenHeightsMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:EvergreenHeightsMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:FairhavenApartmentsMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:FairhavenApartmentsMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:FairwaysMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:FairwaysMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:FairwoodPondMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:FairwoodPondMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:FoothillCommonsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:FoothillCommonsMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:FoothillGardensTwinCreeksMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:FoothillGardensTwinCreeksMember2020-12-310000920522ess:ForestViewMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:ForestViewMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:FostersLandingMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:FostersLandingMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:FountainCourtMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:FountainCourtMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:FountainAtRiveroaksMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:FountainAtRiveroaksMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:FourthUMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:FourthUMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:FoxPlazaMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:FoxPlazaMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TheHenleyIandIIMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TheHenleyIandIIMember2020-12-310000920522ess:HighlandsAtWynhavenMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:HighlandsAtWynhavenMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:HillcrestParkMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:HillcrestParkMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:HillsdaleGardenApartmentsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:HillsdaleGardenApartmentsMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:HopeRanchCollectionMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:HopeRanchCollectionMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:HuntingtonBreakersMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:HuntingtonBreakersMember2020-12-310000920522ess:InglenookCourtMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:InglenookCourtMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:LafayetteHighlandsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:LafayetteHighlandsMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:LakeshoreLandingMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:LakeshoreLandingMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:LaurelsAtMillCreekMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:LaurelsAtMillCreekMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:LawrenceStationMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:LawrenceStationMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:LeParcLuxuryApartmentsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:LeParcLuxuryApartmentsMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MarbrisaMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MarbrisaMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MarinaCityClubMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MarinaCityClubMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MarinaCoveMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MarinaCoveMember2020-12-310000920522ess:MarinersPlaceMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:MarinersPlaceMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MB360Phase1Member2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MB360Phase1Member2020-12-310000920522ess:MesaVillageMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:MesaVillageMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MillCreekAtWindermereMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MillCreekAtWindermereMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MioApartmentCommunityMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MioApartmentCommunityMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MirabellaMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MirabellaMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MiraMonteMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MiraMonteMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MiracleMileMarbellaMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MiracleMileMarbellaMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MissionHillsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MissionHillsMember2020-12-310000920522ess:MissionPeaksMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:MissionPeaksMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MissionPeaksIIMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MissionPeaksIIMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MontarosaMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MontarosaMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MontclaireMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MontclaireMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MontebelloMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MontebelloMember2020-12-310000920522ess:MontejoMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:MontejoMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MontereyVillasMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MontereyVillasMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MuseMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MuseMember2020-12-310000920522ess:Kiely1000Memberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:Kiely1000Memberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MembershipInterestInPalmValleyMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:MembershipInterestInPalmValleyMember2020-12-310000920522ess:ParagonApartmentsMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:ParagonApartmentsMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:Park20Member2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:Park20Member2020-12-310000920522ess:ParkCatalinaMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:ParkCatalinaMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ParkHighlandMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ParkHighlandMember2020-12-310000920522ess:ParkHillAtIssaquahMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:ParkHillAtIssaquahMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ParkViridianMelloRoosMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ParkViridianMelloRoosMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ParkWestMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ParkWestMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ParkwoodatMillCreekMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ParkwoodatMillCreekMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:Patent523Member2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:Patent523Member2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PathwaysMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PathwaysMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PiedmontMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PiedmontMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PinehurstMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PinehurstMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PinnacleatFullertonMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PinnacleatFullertonMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PinnacleonLakeWashingtonMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PinnacleonLakeWashingtonMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PinnacleatMacArthurPlaceMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PinnacleatMacArthurPlaceMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PinnacleatOtayRanchIIIMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PinnacleatOtayRanchIIIMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PinnacleatTalegaMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PinnacleatTalegaMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PinnacleSonataMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PinnacleSonataMember2020-12-310000920522ess:PointeatCupertinoMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:PointeatCupertinoMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PureRedmondMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PureRedmondMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:RadiusMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:RadiusMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ReedSquareMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ReedSquareMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:RegencyAtEncinoMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:RegencyAtEncinoMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:RenaissanceatUptownOrangeMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:RenaissanceatUptownOrangeMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TheRevealMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TheRevealMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:SalmonRunAtPerryCreekMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:SalmonRunAtPerryCreekMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:SammamishViewMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:SammamishViewMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:A101SanFernandoMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:A101SanFernandoMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:SanMarcosMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:SanMarcosMember2020-12-310000920522ess:SanteeCourtMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:SanteeCourtMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ShadowPointMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ShadowPointMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ShadowbrookMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ShadowbrookMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:Slater116Member2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:Slater116Member2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:SolsticeMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:SolsticeMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:StationParkGreenPhasesIIIAndIIIMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:StationParkGreenPhasesIIIAndIIIMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:StevensonPlaceMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:StevensonPlaceMember2020-12-310000920522ess:StonehedgeVillageMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:StonehedgeVillageMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:SummerhillParkMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:SummerhillParkMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:SummitParkMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:SummitParkMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:Taylor28Member2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:Taylor28Member2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TheAudreyatBelltownMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TheAudreyatBelltownMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:AveryTheMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:AveryTheMember2020-12-310000920522ess:BernardMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:BernardMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TheBlakeLAMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TheBlakeLAMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CairnsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CairnsMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CommonsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CommonsMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TheElliotAtMukilteoMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TheElliotAtMukilteoMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TheGallowayMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TheGallowayMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:GrandMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:GrandMember2020-12-310000920522ess:TheHallieonDelMarReySolMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:TheHallieonDelMarReySolMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:HuntingtonMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:HuntingtonMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TheLandingatJackLondonSquareMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TheLandingatJackLondonSquareMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:LoftsAtPinehurstMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:LoftsAtPinehurstMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PalisadesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PalisadesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ThePalmsatLagunaNiguelMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ThePalmsatLagunaNiguelMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TheStuartatSierraMadreMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TheStuartatSierraMadreMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TheTrailsofRedmondMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TheTrailsofRedmondMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TheWaterfordMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TheWaterfordMember2020-12-310000920522ess:TierraVistaMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:TierraVistaMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TiffanyCourtMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TiffanyCourtMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TrabuccoVillasMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TrabuccoVillasMember2020-12-310000920522ess:ValleyParkMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:ValleyParkMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ViaMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ViaMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:VillaAngelinaMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:VillaAngelinaMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:VillaGranadaMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:VillaGranadaMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:VillaSienaMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:VillaSienaMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:VillageGreenMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:VillageGreenMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:VistaBelvedereMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:VistaBelvedereMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:VoxApartmentsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:VoxApartmentsMember2020-12-310000920522ess:WalnutHeightsMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:WalnutHeightsMemberess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:WanderingCreekMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:WanderingCreekMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:WharfsidePointeMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:WharfsidePointeMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:WillowLakeMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:WillowLakeMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:A5600WilshireMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:A5600WilshireMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:WilshireLaBreaMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:WilshireLaBreaMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:WilshirePromenadeMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:WilshirePromenadeMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:WindsorRidgeMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:WindsorRidgeMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:WoodlandCommonsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:WoodlandCommonsMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:WoodsideVillageMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:WoodsideVillageMember2020-12-310000920522ess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMember2020-12-310000920522ess:OtherRealEstateAssetsMembersrt:OtherPropertyMember2020-12-310000920522srt:OtherPropertyMember2020-12-310000920522ess:RealEstateRentalPropertyMember2019-12-310000920522ess:RealEstateRentalPropertyMember2018-12-310000920522ess:RealEstateRentalPropertyMember2017-12-310000920522ess:RealEstateRentalPropertyMember2020-12-310000920522ess:EncumberedApartmentCommunitiesMembersrt:MinimumMemberess:BelmontStationMember2020-01-012020-12-310000920522srt:MaximumMemberess:EncumberedApartmentCommunitiesMemberess:BelmontStationMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMemberess:BrioMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:EncumberedApartmentCommunitiesMemberess:BrioMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMembersrt:MinimumMemberess:Form15Member2020-01-012020-12-310000920522srt:MaximumMemberess:EncumberedApartmentCommunitiesMemberess:Form15Member2020-01-012020-12-310000920522ess:FountainParkMemberess:EncumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:FountainParkMemberess:EncumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:HighridgeMemberess:EncumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522ess:HighridgeMembersrt:MaximumMemberess:EncumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMemberess:MagnoliaSquareMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:EncumberedApartmentCommunitiesMemberess:MagnoliaSquareMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMembersrt:MinimumMemberess:MarquisMember2020-01-012020-12-310000920522srt:MaximumMemberess:EncumberedApartmentCommunitiesMemberess:MarquisMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMembersrt:MinimumMemberess:MembershipInterestInSageAtCupertinoMember2020-01-012020-12-310000920522srt:MaximumMemberess:EncumberedApartmentCommunitiesMemberess:MembershipInterestInSageAtCupertinoMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMembersrt:MinimumMemberess:BarkleyMember2020-01-012020-12-310000920522srt:MaximumMemberess:EncumberedApartmentCommunitiesMemberess:BarkleyMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMembersrt:MinimumMemberess:TheDylanMember2020-01-012020-12-310000920522srt:MaximumMemberess:EncumberedApartmentCommunitiesMemberess:TheDylanMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMembersrt:MinimumMemberess:TheHuxleyMember2020-01-012020-12-310000920522srt:MaximumMemberess:EncumberedApartmentCommunitiesMemberess:TheHuxleyMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMembersrt:MinimumMemberess:TownshipMember2020-01-012020-12-310000920522srt:MaximumMemberess:EncumberedApartmentCommunitiesMemberess:TownshipMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:AgoraMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:AgoraMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:AlessioMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:AlessioMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:AllegroMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:AllegroMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:AllureMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:AllureMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:AlpineVillageMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:AlpineVillageMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:AnaviaMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:AnaviaMember2020-01-012020-12-310000920522ess:AnnalieseMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522ess:AnnalieseMembersrt:MaximumMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:ApexMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:ApexMember2020-01-012020-12-310000920522ess:AquaatMarinaDelReyMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:AquaatMarinaDelReyMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:AscentMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:AscentMember2020-01-012020-12-310000920522ess:AshtonShermanVillageMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:AshtonShermanVillageMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:AvantMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:AvantMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:Avenue64Member2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:Avenue64Member2020-01-012020-12-310000920522ess:AviaraMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:AviaraMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:AvondaleAtWarnerCenterMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:AvondaleAtWarnerCenterMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:BelAirMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:BelAirMember2020-01-012020-12-310000920522ess:BelcarraMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:BelcarraMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:BellaVillagioMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522ess:BellaVillagioMembersrt:MaximumMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:BellCentreMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:BellCentreMember2020-01-012020-12-310000920522ess:BelleriveMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522ess:BelleriveMembersrt:MaximumMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BelmontTerraceMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:BelmontTerraceMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:BennettLoftsMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:BennettLoftsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:BernardoCrestMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:BernardoCrestMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:BonitaCedarsMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:BonitaCedarsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:BoulevardMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:BoulevardMember2020-01-012020-12-310000920522ess:BrooksideOaksMemberess:EncumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:BrooksideOaksMemberess:EncumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:BridleTrailsMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:BridleTrailsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:BrightonRidgeMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:BrightonRidgeMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:BristolCommonsMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:BristolCommonsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:BunkerHillMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:BunkerHillMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:CamarilloOaksMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:CamarilloOaksMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:CambridgeParkMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:CambridgeParkMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:CaminoRuizSquareMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:CaminoRuizSquareMember2020-01-012020-12-310000920522ess:CanyonOaksMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522ess:CanyonOaksMembersrt:MaximumMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:CanyonPointeMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:CanyonPointeMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:CapriAtSunnyHillsMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:CapriAtSunnyHillsMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:CarmelCreekMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:CarmelCreekMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:CarnelLandingMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:CarnelLandingMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CarnelSummitMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:CarnelSummitMember2020-01-012020-12-310000920522ess:CastleCreekMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:CastleCreekMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:CatalinaGardensMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:CatalinaGardensMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:CbcApartmentsMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:CbcApartmentsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:CedarTerraceMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:CedarTerraceMember2020-01-012020-12-310000920522ess:CentrepointeBluffsIiMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522ess:CentrepointeBluffsIiMembersrt:MaximumMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:ChestnutStreetMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:ChestnutStreetMember2020-01-012020-12-310000920522ess:CityViewMemberess:EncumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522ess:CityViewMembersrt:MaximumMemberess:EncumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:CollinsOnPineMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:CollinsOnPineMember2020-01-012020-12-310000920522ess:ConnollyStationMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:ConnollyStationMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:CorbellaAtJuanitaBayMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:CorbellaAtJuanitaBayMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:CortesiaAtRanchoSantaMargaritaMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:CortesiaAtRanchoSantaMargaritaMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:CountryVillasMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:CountryVillasMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:CourtyardOffMainMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:CourtyardOffMainMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:CrowCanyonMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:CrowCanyonMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:DeerValleyMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:DeerValleyMember2020-01-012020-12-310000920522ess:DevonshireMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522ess:DevonshireMembersrt:MaximumMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMembersrt:MinimumMemberess:DomaineMember2020-01-012020-12-310000920522srt:MaximumMemberess:EncumberedApartmentCommunitiesMemberess:DomaineMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:ElevationMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:ElevationMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:EllingtonatBellevueMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:EllingtonatBellevueMember2020-01-012020-12-310000920522ess:EmeraldPointeMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:EmeraldPointeMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:EmeraldRidgeNorthMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:EmeraldRidgeNorthMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:EmersonValleyVillageMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:EmersonValleyVillageMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:EmmeMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:EmmeMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:EnsoMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:EnsoMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:EpicMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:EpicMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:EsplanadeMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:EsplanadeMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:EssexSkylineAtMacauthurPlaceMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:EssexSkylineAtMacauthurPlaceMember2020-01-012020-12-310000920522ess:EvergreenHeightsMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:EvergreenHeightsMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:FairhavenApartmentsMemberess:EncumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:FairhavenApartmentsMemberess:EncumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:FairwaysMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:FairwaysMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:FairwoodPondMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:FairwoodPondMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:FoothillCommonsMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:FoothillCommonsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:FoothillGardensTwinCreeksMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:FoothillGardensTwinCreeksMember2020-01-012020-12-310000920522ess:ForestViewMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:ForestViewMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMembersrt:MinimumMemberess:FostersLandingMember2020-01-012020-12-310000920522srt:MaximumMemberess:EncumberedApartmentCommunitiesMemberess:FostersLandingMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:FountainCourtMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:FountainCourtMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:FountainAtRiveroaksMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:FountainAtRiveroaksMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:FourthUMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:FourthUMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:FoxPlazaMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:FoxPlazaMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:TheHenleyIandIIMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:TheHenleyIandIIMember2020-01-012020-12-310000920522ess:HighlandsAtWynhavenMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:HighlandsAtWynhavenMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:HillcrestParkMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:HillcrestParkMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:HillsdaleGardenApartmentsMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:HillsdaleGardenApartmentsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:HopeRanchCollectionMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:HopeRanchCollectionMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:HuntingtonBreakersMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:HuntingtonBreakersMember2020-01-012020-12-310000920522ess:InglenookCourtMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522ess:InglenookCourtMembersrt:MaximumMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:LafayetteHighlandsMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:LafayetteHighlandsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:LakeshoreLandingMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:LakeshoreLandingMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:LaurelsAtMillCreekMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:LaurelsAtMillCreekMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:LawrenceStationMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:LawrenceStationMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:LeParcLuxuryApartmentsMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:LeParcLuxuryApartmentsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:MarbrisaMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:MarbrisaMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:MarinaCityClubMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:MarinaCityClubMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:MarinaCoveMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:MarinaCoveMember2020-01-012020-12-310000920522ess:MarinersPlaceMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522ess:MarinersPlaceMembersrt:MaximumMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:MB360Phase1Member2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:MB360Phase1Member2020-01-012020-12-310000920522ess:MesaVillageMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:MesaVillageMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:MillCreekAtWindermereMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:MillCreekAtWindermereMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:MioApartmentCommunityMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:MioApartmentCommunityMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:MirabellaMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:MirabellaMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:MiraMonteMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:MiraMonteMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:MiracleMileMarbellaMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:MiracleMileMarbellaMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:MissionHillsMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:MissionHillsMember2020-01-012020-12-310000920522ess:MissionPeaksMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:MissionPeaksMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:MissionPeaksIIMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:MissionPeaksIIMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMembersrt:MinimumMemberess:MontarosaMember2020-01-012020-12-310000920522srt:MaximumMemberess:EncumberedApartmentCommunitiesMemberess:MontarosaMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:MontclaireMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:MontclaireMember2020-01-012020-12-310000920522ess:EncumberedApartmentCommunitiesMembersrt:MinimumMemberess:MontebelloMember2020-01-012020-12-310000920522srt:MaximumMemberess:EncumberedApartmentCommunitiesMemberess:MontebelloMember2020-01-012020-12-310000920522ess:MontejoMemberess:EncumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522ess:MontejoMembersrt:MaximumMemberess:EncumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:MontereyVillasMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:MontereyVillasMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:MuseMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:MuseMember2020-01-012020-12-310000920522ess:Kiely1000Memberess:EncumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:Kiely1000Memberess:EncumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:MembershipInterestInPalmValleyMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:MembershipInterestInPalmValleyMember2020-01-012020-12-310000920522ess:ParagonApartmentsMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:ParagonApartmentsMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:Park20Member2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:Park20Member2020-01-012020-12-310000920522ess:ParkCatalinaMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:ParkCatalinaMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:ParkHighlandMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:ParkHighlandMember2020-01-012020-12-310000920522ess:ParkHillAtIssaquahMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:ParkHillAtIssaquahMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:ParkViridianMelloRoosMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:ParkViridianMelloRoosMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:ParkWestMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:ParkWestMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:ParkwoodatMillCreekMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:ParkwoodatMillCreekMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:Patent523Member2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:Patent523Member2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:PathwaysMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:PathwaysMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:PiedmontMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:PiedmontMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:PinehurstMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:PinehurstMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:PinnacleatFullertonMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:PinnacleatFullertonMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PinnacleonLakeWashingtonMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:PinnacleonLakeWashingtonMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:PinnacleatMacArthurPlaceMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:PinnacleatMacArthurPlaceMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:PinnacleatOtayRanchIIIMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:PinnacleatOtayRanchIIIMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:PinnacleatTalegaMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:PinnacleatTalegaMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:PinnacleSonataMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:PinnacleSonataMember2020-01-012020-12-310000920522ess:PointeatCupertinoMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:PointeatCupertinoMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:PureRedmondMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:PureRedmondMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:RadiusMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:RadiusMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:ReedSquareMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:ReedSquareMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:RegencyAtEncinoMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:RegencyAtEncinoMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:RenaissanceatUptownOrangeMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:RenaissanceatUptownOrangeMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:TheRevealMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:TheRevealMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:SalmonRunAtPerryCreekMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:SalmonRunAtPerryCreekMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:SammamishViewMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:SammamishViewMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:A101SanFernandoMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:A101SanFernandoMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:SanMarcosMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:SanMarcosMember2020-01-012020-12-310000920522ess:SanteeCourtMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:SanteeCourtMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:ShadowPointMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:ShadowPointMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:ShadowbrookMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:ShadowbrookMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:Slater116Member2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:Slater116Member2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:SolsticeMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:SolsticeMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:StationParkGreenPhasesIIIAndIIIMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:StationParkGreenPhasesIIIAndIIIMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:StevensonPlaceMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:StevensonPlaceMember2020-01-012020-12-310000920522ess:StonehedgeVillageMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:StonehedgeVillageMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:SummerhillParkMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:SummerhillParkMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:SummitParkMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:SummitParkMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:Taylor28Member2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:Taylor28Member2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:TheAudreyatBelltownMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:TheAudreyatBelltownMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:AveryTheMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:AveryTheMember2020-01-012020-12-310000920522ess:BernardMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522ess:BernardMembersrt:MaximumMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:TheBlakeLAMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:TheBlakeLAMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:CairnsMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:CairnsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:CommonsMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:CommonsMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMemberess:TheElliotAtMukilteoMembersrt:MinimumMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:TheElliotAtMukilteoMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:TheGallowayMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:TheGallowayMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:GrandMember2020-01-012020-12-310000920522srt:MaximumMemberess:UnencumberedApartmentCommunitiesMemberess:GrandMember2020-01-012020-12-310000920522ess:TheHallieonDelMarReySolMemberess:UnencumberedApartmentCommunitiesMembersrt:MinimumMember2020-01-012020-12-310000920522ess:TheHallieonDelMarReySolMembersrt:MaximumMemberess:UnencumberedApartmentCommunitiesMember2020-01-012020-12-310000920522ess:UnencumberedApartmentCommunitiesMembersrt:MinimumMemberess:HuntingtonMember2020-01-012020-12-31