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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2019-09-20</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001648383</issuerCik>
        <issuerName>CNL Healthcare Properties II, Inc.</issuerName>
        <issuerTradingSymbol>N/A</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001528578</rptOwnerCik>
            <rptOwnerName>Mauldin Stephen H</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>450 SOUTH ORANGE AVE.</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ORLANDO</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>32801</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>See remarks</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2019-09-20</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1435.729</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.92</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>7850.186</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents shares withheld to satisfy tax liability in connection with the vesting of 3,817.729 restricted stock units (&quot;RSUs&quot;) on September 20, 2019.</footnote>
        <footnote id="F2">The shares reported in this box are stated as of September 20, 2019 and are comprised entirely of Class A common stock of CNL Healthcare Properties II, Inc. (the &quot;Company&quot;). Share amounts presented include additional shares acquired through distribution reinvestment.</footnote>
        <footnote id="F3">On August 4, 2016, CHP II Advisors, LLC granted 10,000 RSUs to the Reporting Person. The 10,000 RSUs granted to the Reporting Person have all vested. Each RSU, upon vesting, was settled in one share of Class A common stock of the Company. The RSUs were subject to specified vesting and settlement provisions.</footnote>
    </footnotes>

    <remarks>Director, Chairman of the Board, President and Chief Executive Officer</remarks>

    <ownerSignature>
        <signatureName>/s/ Tracey Bracco, Attorney-In-Fact</signatureName>
        <signatureDate>2019-09-24</signatureDate>
    </ownerSignature>
</ownershipDocument>
