<SEC-DOCUMENT>0001209191-19-007350.txt : 20190205
<SEC-HEADER>0001209191-19-007350.hdr.sgml : 20190205
<ACCEPTANCE-DATETIME>20190205163249
ACCESSION NUMBER:		0001209191-19-007350
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20190201
FILED AS OF DATE:		20190205
DATE AS OF CHANGE:		20190205

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LEVY PAUL S
		CENTRAL INDEX KEY:			0001110176

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-51357
		FILM NUMBER:		19568379

	MAIL ADDRESS:	
		STREET 1:		JOSEPH LITTLEJOHN & LEVY
		STREET 2:		450 LEXINGTON AVE STE 3350
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10036

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Builders FirstSource, Inc.
		CENTRAL INDEX KEY:			0001316835
		STANDARD INDUSTRIAL CLASSIFICATION:	RETAIL-LUMBER & OTHER BUILDING MATERIALS DEALERS [5211]
		IRS NUMBER:				522084569
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2001 BRYAN STREET, SUITE 1600
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75201
		BUSINESS PHONE:		(214) 880-3500

	MAIL ADDRESS:	
		STREET 1:		2001 BRYAN STREET, SUITE 1600
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75201
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2019-02-01</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001316835</issuerCik>
        <issuerName>Builders FirstSource, Inc.</issuerName>
        <issuerTradingSymbol>BLDR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001110176</rptOwnerCik>
            <rptOwnerName>LEVY PAUL S</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>245 PARK AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 1601</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10167</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, par value $0.01 per share</value>
            </securityTitle>
            <transactionDate>
                <value>2019-02-01</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3474</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>13.31</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1124898</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Reflects acquisition of shares in lieu of cash compensation for services as a director under the Corporation's 2014 Incentive Plan pursuant to the Corporation's Amended and Restated Director Compensation Policy.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Jeffrey A. Wier by power of attorney</signatureName>
        <signatureDate>2019-02-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24.4_830323
<SEQUENCE>2
<FILENAME>poa.txt
<DESCRIPTION>POA DOCUMENT
<TEXT>
POWER OF ATTORNEY


KNOW ALL PERSONS BY THESE PRESENTS that the undersigned hereby authorizes,
designates, and appoints Donald McAleenan and Jeffrey A. Wier as such person's
true and lawful attorneys-in-fact and agents, with full power of substitution
and resubstitution and full power to act, for the undersigned and in the
undersigned's name, place, and stead, to execute, acknowledge, deliver, and file
any and all statements required to be filed with the United States Securities
and Exchange Commission (the "Commission") by the undersigned pursuant to 1)
Section 16 of the Securities Exchange Act of 1934, as amended (the "1934 Act")
or 2) Rule 144 promulgated under the Securities Act of 1933, as amended (the
"1933 Act"), and the rules and regulations thereunder with respect to securities
of Builders FirstSource, Inc., a Delaware corporation, including, without
limitation, statements on Form 4, Form 5 and Form 144 (and any amendments
thereto) and any successor forms adopted by the Commission, as required by the
1934 Act or the 1933 Act and the rules and regulations thereunder, and to take
such other actions as such attorneys-in-fact may deem necessary or appropriate
in connection with such statements.

This power of attorney shall continue in effect until the undersigned no longer
has an obligation to file statements under Section 16 of the 1934 Act or Rule
144 under the 1933 Act, or until specifically terminated in writing by the
undersigned.  The undersigned acknowledges that the aforesaid persons are not
assuming any of the undersigned's responsibilities to comply with Section 16 of
the 1934 Act or Rule 144 under the 1933 Act.

IN WITNESS WHEREOF, the undersigned has duly executed this power of attorney on
the 20th day of December, 2005.




By:	/s/ Paul S. Levy
        Paul S. Levy


</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
