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

    <schemaVersion>X0303</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2009-04-10</periodOfReport>

    <dateOfOriginalSubmission>2009-04-10</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001438355</issuerCik>
        <issuerName>CapitalSource Healthcare REIT</issuerName>
        <issuerTradingSymbol>CHR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001456907</rptOwnerCik>
            <rptOwnerName>James JayCee</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>9298 SVL BOX</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>VICTORVILLE</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92395</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Majority Holder</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Preferred</value>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
            </securityTitle>
            <transactionDate>
                <value>2009-04-10</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2009-04-10</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>5000000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5000000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common</value>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
            </securityTitle>
            <transactionDate>
                <value>2009-04-10</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2009-04-10</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>42105000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>42105000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Establishment of the Capital Source Healthcare REIT discriminatory share price, the reporting owner has determined to issue as previously filed in the SEC Form 4, 5,000,000 preferred stock upon the completion of Capital Source Healthcare REIT (CHR) corporate restructuring notwithstanding all like Communications industry comparable share structures and share prices.</footnote>
        <footnote id="F2">Establishment of the Capital Source Healthcare REIT discriminatory share price, the reporting owner has determined to issue as previously filed in the SEC Form 4, 42,105,000 common stock upon the completion of Capital Source Healthcare REIT (CHR) corporate restructuring notwithstanding all like Communications industry comparable share structures and share prices.</footnote>
    </footnotes>

    <remarks>All Common shares and Preferred shares if applicable currently outstanding listed as 42,105,000 common on NYSE under Ticker Symbol CHR and all other exchanges &amp; trading markets As of Apr 10, 2009 notwithstanding Form 3 filed April 10, 2009 and subsequently Form 3A filed April 10, 2009 shall be transferred to majority holder and ownership listed with all Market Makers and Transfer Agents including proper book entry as permitted in the most current filing. As used herein, the term own includes legal ownership, but in all cases includes beneficial ownership more than 50% of whose equity interests are beneficially owned. According to SEC Forms 3, 3/A filed on 4/10/2009, Control is deemed to exist as permitted under 13d-4 of SEC 34 I expressly declare that the current filing shall be construed as an admission that such person is for the purposes of Sections 13(d) or 13(g) the beneficial owner of any securities covered by the filings defined for these purposes.</remarks>

    <ownerSignature>
        <signatureName>JayCee James</signatureName>
        <signatureDate>2009-04-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
