<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-11-18</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000844789</issuerCik>
        <issuerName>US HOME SYSTEMS INC</issuerName>
        <issuerTradingSymbol>USHS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001028639</rptOwnerCik>
            <rptOwnerName>GROSS MURRAY H</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>405 STATE HIGHWAY 121 BYPASS</rptOwnerStreet1>
            <rptOwnerStreet2>BUILDING A, SUITE 250</rptOwnerStreet2>
            <rptOwnerCity>LEWISVILLE</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75067</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chairman &amp; CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2008-11-18</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>10000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2.04</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>534483</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote 1.</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">After all reported transactions, Mr. Gross owns 534,483 shares of common stock which includes 243,093 shares of common stock held by About Face, Ltd., 204,390 shares held by BLG Partners, 27,000 restricted stock awards, 10,000 shares owned directly by Mr. Gross and options to acquire 50,000 shares at an exercise price of $1.85 per share which expire 11/11/2018.  About Face Limited is a family limited partnership, the partners of which are Murray H. Gross and his wife, Barbara Gross, each of whom own a 49.5% interest in the partnership.  GP About Face Ltd. is a general partner of the partnership and owns a 1% interest in the partnership.  Mr. Gross is the president of the general partner, BLG is a limited partnership, the partners of which are Murray Gross and his spouse, Barbara Gross.  Mr. Gross has sole investment and voting power over the shares of common stock held by both partnerships.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Murray H. Gross</signatureName>
        <signatureDate>2008-11-19</signatureDate>
    </ownerSignature>
</ownershipDocument>
