-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 G9bQG2WSUvDgDcUk3em2NSxf/zCvXLeYmOklfUyfMQkuYobrXq4soXLvm2pTJCkH
 rQLgXqLWj83kaon+/SgHKQ==

<SEC-DOCUMENT>0001193805-09-001858.txt : 20090929
<SEC-HEADER>0001193805-09-001858.hdr.sgml : 20090929
<ACCEPTANCE-DATETIME>20090929185445
ACCESSION NUMBER:		0001193805-09-001858
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20090924
FILED AS OF DATE:		20090929
DATE AS OF CHANGE:		20090929

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			STADIUM RELATIVE VALUE PARTNERS LP
		CENTRAL INDEX KEY:			0001123807

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-51357
		FILM NUMBER:		091094055

	BUSINESS ADDRESS:	
		STREET 1:		430 COWPER ST
		STREET 2:		STE 200
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94301

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			KENT BRADLEY R
		CENTRAL INDEX KEY:			0001473001

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-51357
		FILM NUMBER:		091094057

	MAIL ADDRESS:	
		STREET 1:		C/O STADIUM CAPITAL MANAGEMENT, LLC
		STREET 2:		19785 VILLAGE OFFICE COURT, SUITE 101
		CITY:			BEND
		STATE:			OR
		ZIP:			97702

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SEAVER ALEXANDER M
		CENTRAL INDEX KEY:			0001473106

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-51357
		FILM NUMBER:		091094056

	MAIL ADDRESS:	
		STREET 1:		C/O STADIUM CAPITAL MANAGEMENT, LLC
		STREET 2:		19785 VILLAGE OFFICE COURT, SUITE 101
		CITY:			BEND
		STATE:			OR
		ZIP:			97702

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

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			STADIUM CAPITAL MANAGEMENT LLC
		CENTRAL INDEX KEY:			0001105087
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-51357
		FILM NUMBER:		091094058

	BUSINESS ADDRESS:	
		STREET 1:		19785 VILLAGE OFFICE COURT
		STREET 2:		STE 101
		CITY:			BEND
		STATE:			OR
		ZIP:			97702
		BUSINESS PHONE:		6503214000

	MAIL ADDRESS:	
		STREET 1:		19785 VILLAGE OFFICE COURT
		STREET 2:		STE 101
		CITY:			BEND
		STATE:			OR
		ZIP:			97702
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>e605870_ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0203</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2009-09-24</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001105087</rptOwnerCik>
            <rptOwnerName>STADIUM CAPITAL MANAGEMENT LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>19785 VILLAGE OFFICE COURT, SUITE 101</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BEND</rptOwnerCity>
            <rptOwnerState>OR</rptOwnerState>
            <rptOwnerZipCode>97702</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>See Footnote 1.</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001473001</rptOwnerCik>
            <rptOwnerName>KENT BRADLEY R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O STADIUM CAPITAL MANAGEMENT, LLC</rptOwnerStreet1>
            <rptOwnerStreet2>19785 VILLAGE OFFICE COURT, SUITE 101</rptOwnerStreet2>
            <rptOwnerCity>BEND</rptOwnerCity>
            <rptOwnerState>OR</rptOwnerState>
            <rptOwnerZipCode>97702</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>See Footnote 1.</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001473106</rptOwnerCik>
            <rptOwnerName>SEAVER ALEXANDER M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O STADIUM CAPITAL MANAGEMENT, LLC</rptOwnerStreet1>
            <rptOwnerStreet2>19785 VILLAGE OFFICE COURT, SUITE 101</rptOwnerStreet2>
            <rptOwnerCity>BEND</rptOwnerCity>
            <rptOwnerState>OR</rptOwnerState>
            <rptOwnerZipCode>97702</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>See Footnote 1.</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001123807</rptOwnerCik>
            <rptOwnerName>STADIUM RELATIVE VALUE PARTNERS LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O STADIUM CAPITAL MANAGEMENT, LLC</rptOwnerStreet1>
            <rptOwnerStreet2>19785 VILLAGE OFFICE COURT, SUITE 101</rptOwnerStreet2>
            <rptOwnerCity>BEND</rptOwnerCity>
            <rptOwnerState>OR</rptOwnerState>
            <rptOwnerZipCode>97702</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>See Footnote 1.</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, par value $0.01 per share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1786442</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F1"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Client Accounts</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, par value $0.01 per share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3580698</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F1"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Stadium Relative Value Partners, L.P.</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This report is filed jointly by Stadium Capital Management, LLC (&quot;SCM&quot;), Stadium Relative Value Partners, L.P. (&quot;SRV&quot;),
 Bradley R. Kent and Alexander M. Seaver.  SCM is the general partner and investment adviser of SRV.  Messrs. Kent and Seaver
 are managers of SCM.   By virtue of these relationships, each of the reporting persons may be deemed to be beneficial owners
 of more than 10% of the outstanding common stock of Builders FirstSource, Inc. (the &quot;Issuer&quot;). SRV is filing this statement
 jointly with the other reporting persons, but not as a member of a group and expressly disclaims membership in a group.
 Each of the reporting persons disclaims beneficial ownership of shares of common stock of the Issuer not directly owned by
 it/him, except to the extent of its/his pecuniary interest therein.</footnote>
        <footnote id="F2">Represents shares beneficially owned by SCM that were acquired for client accounts for which SCM is the investment adviser.</footnote>
        <footnote id="F3">Represents shares beneficially owned by SRV.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>By: Stadium Capital Management, LLC, By: /s/ Bradley R. Kent, Manager</signatureName>
        <signatureDate>2009-09-29</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Kent, Bradley R.</signatureName>
        <signatureDate>2009-09-29</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Seaver, Alexander M.</signatureName>
        <signatureDate>2009-09-29</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>By: Stadium Relative Value Partners, L.P., By: Stadium Capital Managment, LLC, By: /s/ Bradley R. Kent, Manager</signatureName>
        <signatureDate>2009-09-29</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----