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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2015-04-21</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001574532</issuerCik>
        <issuerName>WCI Communities, Inc.</issuerName>
        <issuerTradingSymbol>WCIC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001052161</rptOwnerCik>
            <rptOwnerName>STONEHILL INSTITUTIONAL PARTNERS LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O STONEHILL CAPITAL MANAGEMENT LLC</rptOwnerStreet1>
            <rptOwnerStreet2>885 THIRD AVENUE, 30TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, par value $0.01 per share (&quot;Common Stock&quot;)</value>
            </securityTitle>
            <transactionDate>
                <value>2015-04-21</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1795531</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>22.75</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4835526</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Sale of shares in WCIC's underwritten secondary offering (including pursuant to the underwriters' exercise of an over-allotment option).</footnote>
        <footnote id="F2">The price of $22.75 does not reflect underwriter discount or fees.</footnote>
    </footnotes>

    <remarks>Stonehill Capital Management LLC, a Delaware limited liability company (&quot;Management&quot;), Stonehill General Partner, LLC, a Delaware limited liability company (&quot;GP&quot;), and Messrs. John Motulsky, Christopher Wilson, Wayne Teetsel, Thomas Varkey, Jonathan Sacks, Peter Sisitsky, Michael Thoyer and Michael Stern may each be deemed to have a pecuniary interest in the shares reported herein as directly held by Stonehill Institutional Partners, L.P. (&quot;Partners&quot;).  Due to the limitation on the number of reporting persons that may be included on a single Form 4, each of such persons is included as a Reporting Person on a separate Form 4 with respect to such interests. Solely for purposes of Section 16 of the Exchange Act, Partners may be deemed to be directors-by-deputization by virtue of Partners' contractual right to designate two members of the board of directors of WCIC. Christopher Wilson, a managing member of GP and Management, is a member of WCIC's board of directors.</remarks>

    <ownerSignature>
        <signatureName>STONEHILL INSTITUTIONAL PARTNERS, L.P., By:  /s/ Paul Malek, Authorized Signatory</signatureName>
        <signatureDate>2015-04-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
