<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-09-01</periodOfReport>
    <issuer>
        <issuerCik>0000885508</issuerCik>
        <issuerName>STRATUS PROPERTIES INC</issuerName>
        <issuerTradingSymbol>STRS</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001144411</rptOwnerCik>
            <rptOwnerName>LESLIE JAMES</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>16250  DALLAS PARKWAY, SUITE 102</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75248</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><derivativeTable><derivativeTransaction><securityTitle><value>Options (right to buy) </value><footnoteId id="F1"/></securityTitle><conversionOrExercisePrice><value>10.375</value></conversionOrExercisePrice><transactionDate><value>2003-09-01</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>2500</value></transactionShares><transactionPricePerShare><value>0</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2004-09-01</value><footnoteId id="F2"/></exerciseDate><expirationDate><value>2013-09-01</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>2500</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>2500</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">Options with rights to &quot;Option Cancellation Gain&quot; Payments</footnote><footnote id="F2">25% exercisable on the date indicated and 25% exercisable on each of the next three anniversaries thereof</footnote></footnotes><remarks/><ownerSignature><signatureName>Margaret F. Murphy with power of attorney for James C. Leslie</signatureName><signatureDate>2003-09-02</signatureDate></ownerSignature></ownershipDocument>

