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  <xs:element id="alx_InterestRateCapPremiumAmortization" abstract="false" name="InterestRateCapPremiumAmortization" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alx_PaymentsForCapitalImprovementsAndConstructionInProcessAndOther" abstract="false" name="PaymentsForCapitalImprovementsAndConstructionInProcessAndOther" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alx_PaymentsRelatedToPropertyHeldForSale" abstract="false" name="PaymentsRelatedToPropertyHeldForSale" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alx_NonCashAdditionsToRealEstate" abstract="false" name="NonCashAdditionsToRealEstate" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alx_WriteOffOfFullyAmortizedAndDepreciatedAssets" abstract="false" name="WriteOffOfFullyAmortizedAndDepreciatedAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alx_ReclassificationOfPropertyHeldForSale" abstract="false" name="ReclassificationOfPropertyHeldForSale" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alx_DirectServicesMember" abstract="true" name="DirectServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_BloombergL.P.Member" abstract="true" name="BloombergL.P.Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_A731LexingtonAvenuePropertyMember" abstract="true" name="A731LexingtonAvenuePropertyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_IncentiveAssetFromLessor" abstract="false" name="IncentiveAssetFromLessor" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alx_RentAbatementAmount" abstract="false" name="RentAbatementAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alx_TenantFundByCorrespondingAmount" abstract="false" name="TenantFundByCorrespondingAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alx_RegoParkIShoppingCenterMember" abstract="true" name="RegoParkIShoppingCenterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_AlexandersInc.Member" abstract="true" name="AlexandersInc.Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_VornadoMember" abstract="true" name="VornadoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_OfficeAndRetailSpaceMember" abstract="true" name="OfficeAndRetailSpaceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_CommonAreaMember" abstract="true" name="CommonAreaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_RegoPark2PropertyMember" abstract="true" name="RegoPark2PropertyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_LexingtonAvenuePropertyMember" abstract="true" name="LexingtonAvenuePropertyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_PropertyManagementFeesMember" abstract="true" name="PropertyManagementFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_ManagementAndDevelopmentAgreementBaseManagementFeeMember" abstract="true" name="ManagementAndDevelopmentAgreementBaseManagementFeeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_DevelopmentFeesMember" abstract="true" name="DevelopmentFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_LeasingFeesMember" abstract="true" name="LeasingFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_ManagementFeeAgreementValue" abstract="false" name="ManagementFeeAgreementValue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alx_PropertyManagementFeeAgreementPricePerSquareFoot" abstract="false" name="PropertyManagementFeeAgreementPricePerSquareFoot" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="srt-types:perUnitItemType"/>
  <xs:element id="alx_PropertyManagementFeeEscalationPercentagePerAnnum" abstract="false" name="PropertyManagementFeeEscalationPercentagePerAnnum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="alx_DevelopmentFeePercentage" abstract="false" name="DevelopmentFeePercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="alx_LeaseFeePercentageOfRentOneToTenYears" abstract="false" name="LeaseFeePercentageOfRentOneToTenYears" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="alx_LeaseFeePercentageOfRentElevenToTwentyYears" abstract="false" name="LeaseFeePercentageOfRentElevenToTwentyYears" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="alx_LeaseFeePercentageOfRentTwentyFirstToThirtyYears" abstract="false" name="LeaseFeePercentageOfRentTwentyFirstToThirtyYears" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="alx_PercentageCommissionsOnSaleOfAssetsUnderFiftyMillion" abstract="false" name="PercentageCommissionsOnSaleOfAssetsUnderFiftyMillion" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="alx_AssetSaleCommissionThreshold" abstract="false" name="AssetSaleCommissionThreshold" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alx_PercentageCommissionsOnSaleOfAssetsOverFiftyMillion" abstract="false" name="PercentageCommissionsOnSaleOfAssetsOverFiftyMillion" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="alx_LeaseCommissionPercentage" abstract="false" name="LeaseCommissionPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="alx_CompanyManagementFeesMember" abstract="true" name="CompanyManagementFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_PropertyManagementCleaningEngineeringParkingAndSecurityFeesMember" abstract="true" name="PropertyManagementCleaningEngineeringParkingAndSecurityFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_AlexanderApartmentTowerMember" abstract="true" name="AlexanderApartmentTowerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_NotesPayableGross" abstract="false" name="NotesPayableGross" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alx_DebtCovenantAxisAxis" abstract="true" name="DebtCovenantAxisAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="alx_DebtCovenantAxisDomain" abstract="true" name="DebtCovenantAxisDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_LoanAmountsBelow65MMember" abstract="true" name="LoanAmountsBelow65MMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_LoanAmountsAbove65MMember" abstract="true" name="LoanAmountsAbove65MMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_RegoParkIIShoppingCenterMortgageLoanMember" abstract="true" name="RegoParkIIShoppingCenterMortgageLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_ScheduleOfInsuranceTypeAndTierIdentifierAxis" abstract="true" name="ScheduleOfInsuranceTypeAndTierIdentifierAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="alx_ScheduleOfInsuranceTypeAndTierIdentifierDomain" abstract="true" name="ScheduleOfInsuranceTypeAndTierIdentifierDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_AllRiskPropertyAndRentalValueMember" abstract="true" name="AllRiskPropertyAndRentalValueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_TerrorismCoverageIncludingNbcrMember" abstract="true" name="TerrorismCoverageIncludingNbcrMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_NbcrMember" abstract="true" name="NbcrMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_FiftyNinthStreetInsuranceCompanyLlcMember" abstract="true" name="FiftyNinthStreetInsuranceCompanyLlcMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alx_InsuranceMaximumCoveragePerProperty" abstract="false" name="InsuranceMaximumCoveragePerProperty" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alx_InsuranceMaximumCoveragePerIncident" abstract="false" name="InsuranceMaximumCoveragePerIncident" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alx_InsuranceMaximumCoverageInAggregate" abstract="false" name="InsuranceMaximumCoverageInAggregate" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alx_InsuranceDeductible" abstract="false" name="InsuranceDeductible" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alx_SelfInsuredResponsibility" abstract="false" name="SelfInsuredResponsibility" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="alx_FederalGovernmentResponsibility" abstract="false" name="FederalGovernmentResponsibility" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="alx_ReportableSegmentMember" abstract="true" name="ReportableSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
