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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2018-10-19</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>2018-10-19</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>899</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>10.06</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9157.705</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 3,689 restricted stock units (&quot;RSUs&quot;) on September 1, 2018.</footnote>
        <footnote id="F2">The shares reported in this box are stated as of October 19, 2018, and include 5,468.186 shares of Class A common stock of CNL Healthcare Properties II, Inc. (the &quot;Company&quot;) and 3,689.519 RSUs awarded to the Reporting Person that are subject to specified vesting and settlement provisions. 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. Each RSU will, upon vesting, be settled in one share of Class A common stock of the Company. The RSUs are subject to specified vesting and settlement provisions. Each RSU will, upon vesting, be settled in one share of Class A common stock of the Company.</footnote>
    </footnotes>

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

    <ownerSignature>
        <signatureName>/s/ Tracey Bracco, Attorney-In-Fact</signatureName>
        <signatureDate>2018-10-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
