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  <xs:element id="strs_ProceedsFromBondsMUDReimbursements" abstract="false" name="ProceedsFromBondsMUDReimbursements" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="strs_DefinedContributionPlanEmployerSafeHarborContributionPercent" abstract="false" name="DefinedContributionPlanEmployerSafeHarborContributionPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="strs_DevelopmentAndConstructionManagementFeeMember" abstract="true" name="DevelopmentAndConstructionManagementFeeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
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  <xs:element id="strs_ProceedsFromIssuanceOfDebtNetOfRepayments" abstract="false" name="ProceedsFromIssuanceOfDebtNetOfRepayments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="strs_CostOfDevelopedPropertySales" abstract="false" name="CostOfDevelopedPropertySales" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="strs_ScheduleOfIncomeTaxesLineItems" abstract="true" name="ScheduleOfIncomeTaxesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="strs_MunicipalUtilityDistrictReimbursementsPolicyTextBlock" abstract="false" name="MunicipalUtilityDistrictReimbursementsPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
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  <xs:element id="strs_EmployeeTypeDomain" abstract="true" name="EmployeeTypeDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="strs_LIBORMaximumMember" abstract="true" name="LIBORMaximumMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="strs_DebtInstrumentCovenantInterestRate" abstract="false" name="DebtInstrumentCovenantInterestRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="strs_TheSaintMaryMember" abstract="true" name="TheSaintMaryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="strs_LakewayMasterLeaseUnleased3PadSitesMember" abstract="true" name="LakewayMasterLeaseUnleased3PadSitesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="strs_GoldmanSachsLoanMember" abstract="true" name="GoldmanSachsLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="strs_DeferredCompensationArrangementwithIndividualVestingPeriodofStockIssuedforProjectsInExcessofAnniversaryThreshold" abstract="false" name="DeferredCompensationArrangementwithIndividualVestingPeriodofStockIssuedforProjectsInExcessofAnniversaryThreshold" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="strs_RealEstateNetAbstract" abstract="true" name="RealEstateNetAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="strs_JonesCrossingConstructionLoanMember" abstract="true" name="JonesCrossingConstructionLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="strs_WAustinHotelResidencesMember" abstract="true" name="WAustinHotelResidencesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="strs_ShareBasedCompensationArrangementBySharebasedPaymentAwardPerformanceShareUnitPayoutPercentage" abstract="false" name="ShareBasedCompensationArrangementBySharebasedPaymentAwardPerformanceShareUnitPayoutPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="strs_CostOfSalesExcludingDepreciation" abstract="false" name="CostOfSalesExcludingDepreciation" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="strs_AustinRetailPartnersMember" abstract="true" name="AustinRetailPartnersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="strs_Paymentsonmasterleaseobligations" abstract="false" name="Paymentsonmasterleaseobligations" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="strs_LantanaPlaceConstructionLoanMember" abstract="true" name="LantanaPlaceConstructionLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="strs_AssetManagementFeeMember" abstract="true" name="AssetManagementFeeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="strs_LakewayMasterLeaseUnleased1PadSiteMember" abstract="true" name="LakewayMasterLeaseUnleased1PadSiteMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="strs_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseDisposalGroupIncludingDiscontinuedOperationsIncludingExchangeRateEffect" abstract="false" name="CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseDisposalGroupIncludingDiscontinuedOperationsIncludingExchangeRateEffect" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="strs_KingwoodPlaceMember" abstract="true" name="KingwoodPlaceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="strs_DevelopmentFeeCreditsAmountEligibleForSalePerYear" abstract="false" name="DevelopmentFeeCreditsAmountEligibleForSalePerYear" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="strs_ProfitParticipationPercentageContingentonSaleofProject" abstract="false" name="ProfitParticipationPercentageContingentonSaleofProject" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="strs_DisposalGroupIncludingDiscontinuedOperationRestrictedCash" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationRestrictedCash" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="strs_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedInPeriodTotalFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedInPeriodTotalFairValue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="strs_DevelopmentFeeCreditsCumulativeAmountSoldToThirdParties" abstract="false" name="DevelopmentFeeCreditsCumulativeAmountSoldToThirdParties" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="strs_Principalandinterestterm" abstract="false" name="Principalandinterestterm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="strs_CostOfUndevelopedPropertySales" abstract="false" name="CostOfUndevelopedPropertySales" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="strs_TheSaintMaryConstructionLoanMember" abstract="true" name="TheSaintMaryConstructionLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="strs_A2013StockIncentivePlanMember" abstract="true" name="A2013StockIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="strs_DevelopmentFeeCreditsCumulativeAmountPermanentlyUsed" abstract="false" name="DevelopmentFeeCreditsCumulativeAmountPermanentlyUsed" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="strs_PerformanceSharesandRestrictedStockUnitsMember" abstract="true" name="PerformanceSharesandRestrictedStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="strs_RealEstateCommissionsAndOtherMember" abstract="true" name="RealEstateCommissionsAndOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="strs_DeferredCompensationArrangementwithIndividualReturnPercentNotDesignatedtoPlan" abstract="false" name="DeferredCompensationArrangementwithIndividualReturnPercentNotDesignatedtoPlan" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="strs_SantalPhaseIIConstructionLoanMember" abstract="true" name="SantalPhaseIIConstructionLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="strs_CircleCMember" abstract="true" name="CircleCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="strs_ACRCLenderLLCMember" abstract="true" name="ACRCLenderLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="strs_MunicipalUtilityDistrictReimbursementCashFlow" abstract="false" name="MunicipalUtilityDistrictReimbursementCashFlow" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="strs_DisposalGroupIncludingDiscontinuedOperationRevenueFromContractWithCustomer" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationRevenueFromContractWithCustomer" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="strs_DeferredCompensationArrangementwithIndividualVestingPeriodofStockIssued" abstract="false" name="DeferredCompensationArrangementwithIndividualVestingPeriodofStockIssued" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="strs_LongtermDebtIncludingCurrentMaturitiesPrincipalAmount" abstract="false" name="LongtermDebtIncludingCurrentMaturitiesPrincipalAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="strs_EffectiveIncomeTaxRateReconciliationTaxCutsandJobsActof2017IncomeTaxBenefitExpenseAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationTaxCutsandJobsActof2017IncomeTaxBenefitExpenseAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="strs_Interestpaymentsinitialterm" abstract="false" name="Interestpaymentsinitialterm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
</xs:schema>
