-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 uwQkJewV/QfvRq8yinzDsg==

<SEC-DOCUMENT>0001209191-04-057314.txt : 20041213
<SEC-HEADER>0001209191-04-057314.hdr.sgml : 20041213
<ACCEPTANCE-DATETIME>20041213155741
ACCESSION NUMBER:		0001209191-04-057314
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20041209
FILED AS OF DATE:		20041213
DATE AS OF CHANGE:		20041213

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FIRST RESERVE GP IX  L P
		CENTRAL INDEX KEY:			0001233496

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13831
		FILM NUMBER:		041198889

	BUSINESS ADDRESS:	
		STREET 1:		ONE LAFAYETTE PLACE
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FIRST RESERVE FUND IX L P
		CENTRAL INDEX KEY:			0001233497

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13831
		FILM NUMBER:		041198890

	BUSINESS ADDRESS:	
		STREET 1:		ONE LAFAYETTE PLACE
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			QUANTA SERVICES INC
		CENTRAL INDEX KEY:			0001050915
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRICAL WORK [1731]
		IRS NUMBER:				742851603
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1360 POST OAK BLVD
		STREET 2:		SUITE 2100
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77056
		BUSINESS PHONE:		7133506000

	MAIL ADDRESS:	
		STREET 1:		1360 POST OAK BLVD SUITE 2100
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77056

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FIRST RESERVE GP IX INC
		CENTRAL INDEX KEY:			0001168363
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13831
		FILM NUMBER:		041198891

	BUSINESS ADDRESS:	
		STREET 1:		ONE LAFAYETTE PLACE
		STREET 2:		THIRD FLOOR
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830
		BUSINESS PHONE:		203-661-6601

	MAIL ADDRESS:	
		STREET 1:		ONE LAFAYETTE PLACE
		STREET 2:		THIRD FLOOR
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>doc4a.xml
<DESCRIPTION>FORM 4/A SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2004-12-09</periodOfReport>

    <dateOfOriginalSubmission>2004-12-09</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001050915</issuerCik>
        <issuerName>QUANTA SERVICES INC</issuerName>
        <issuerTradingSymbol>PWR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001168363</rptOwnerCik>
            <rptOwnerName>FIRST RESERVE GP IX INC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE LAFAYETTE PLACE</rptOwnerStreet1>
            <rptOwnerStreet2>THIRD FLOOR</rptOwnerStreet2>
            <rptOwnerCity>GREENWICH</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06830</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001233497</rptOwnerCik>
            <rptOwnerName>FIRST RESERVE FUND IX L P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE LAFAYETTE PLACE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>GREENWICH</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06830</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001233496</rptOwnerCik>
            <rptOwnerName>FIRST RESERVE GP IX  L P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE LAFAYETTE PLACE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>GREENWICH</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06830</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2004-12-09</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3692000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>7.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>15161052</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F4"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See FN</value>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The sale of shares as reported on this Form 4 were made by First Reserve Fund IX, L.P.</footnote>
        <footnote id="F2">Consists of (i) 15,099,204 shares of Common Stock held directly by First Reserve Fund IX, L.P.; (ii) 45,187 shares of Common Stock issued to Ben A. Guill in his capacity as a director of the Issuer; and (iii) 16,661 shares of Common Stock held of record by Thomas Sikorski, a former director of the Issuer (See Footnote 3), for an aggregate of 15,161,052 shares of Common Stock.  The Fund Entities (as defined in Footnote 4) have an interest in a portion of the proceeds from the aforementioned common stock issued to Messrs. Guill and Sikorski.  Messrs. Guill and Sikorski disclaim beneficial ownership of any securities of the Issuer held by the Fund Entities.</footnote>
        <footnote id="F3">As previously reported on November 30, 2004, Mr. Sikorski resigned as a director of the Issuer.  As a result of his resignation, Mr. Sikorski forfeited to the Issuer 45,062 shares of unvested restricted stock, resulting in Mr. Sikorski being the record holder of 16,661 shares of common stock of the Issuer.  Although this disposition to the Issuer is exempt from reporting pursuant to Section 16b-3(e) of the Securities Exchange Act of 1934, as amended, it is mentioned here for clarification.</footnote>
        <footnote id="F4">This Form 4 is being filed on behalf of First Reserve GP IX, Inc. (&quot;GP IX Inc.&quot;), First Reserve GP IX, L.P. (&quot;GP IX&quot;), and First Reserve Fund IX, L.P. (&quot;Fund IX&quot;), each as 10% beneficial owners (collectively the &quot;Fund Entities&quot;).  GP IX is the general partner of Fund IX and may be deemed to beneficially own all of the shares of Common Stock owned by Fund IX.  GP IX Inc., as the general partner of GP IX, may be deemed to beneficially own all of the shares of Common Stock owned by Fund IX.</footnote>
    </footnotes>

    <remarks>First Reserve GP IX, Inc., by Thomas R. Denison, is signing for itself as the designated filer, as well as in the capacity of general partner of GP IX.  GP IX is signing for Fund IX, as its general partner.</remarks>

    <ownerSignature>
        <signatureName>Thomas R. Denison, Managing Director</signatureName>
        <signatureDate>2004-12-13</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
