<SUBMISSION>
<ACCESSION-NUMBER>0000950129-04-006354
<TYPE>S-8
<PUBLIC-DOCUMENT-COUNT>5
<REFERENCES-429>333-102448
<REFERENCES-429>333-105997
<REFERENCES-429>333-86375
<FILING-DATE>20040820
<EFFECTIVENESS-DATE>20040820
<FILER>
<COMPANY-DATA>
<CONFORMED-NAME>QUANTA SERVICES INC
<CIK>0001050915
<ASSIGNED-SIC>1731
<IRS-NUMBER>742851603
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>S-8
<ACT>33
<FILE-NUMBER>333-118429
<FILM-NUMBER>04989638
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>1360 POST OAK BLVD
<STREET2>SUITE 2100
<CITY>HOUSTON
<STATE>TX
<ZIP>77056
<PHONE>7133506000
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>1360 POST OAK BLVD SUITE 2100
<CITY>HOUSTON
<STATE>TX
<ZIP>77056
</MAIL-ADDRESS>
</FILER>
<DOCUMENT>
<TYPE>S-8
<SEQUENCE>1
<FILENAME>h17890sv8.htm
<DESCRIPTION>QUANTA SERVICES, INC.
<TEXT>
<HTML>
<HEAD>
<TITLE>sv8</TITLE>
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<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>
<DIV style="font-family: 'Times New Roman',Times,serif">


<P align="center" style="font-size: 10pt">As filed with the Securities and Exchange Commission on August&nbsp;20, 2004


<P align="right" style="font-size: 10pt">Registration No.&nbsp;333&#8209;________



<HR size="4" noshade color="#000000" style="margin-top: -5px">
<HR size="1" noshade color="#000000" style="margin-top: -10px">





<DIV align="center" style="font-size: 14pt"><B>UNITED STATES<BR>
SECURITIES AND EXCHANGE COMMISSION</B>
</DIV>

<DIV align="center" style="font-size: 12pt"><B>Washington, D.C. 20549</B>
</DIV>


<P align="center" style="font-size: 10pt"><HR size="1" noshade width="25%" align="center">


<P align="center" style="font-size: 18pt"><B>FORM S&#8209;8</B>


<P align="center" style="font-size: 10pt">REGISTRATION STATEMENT<BR>
UNDER<BR>
THE SECURITIES ACT OF 1933



<P align="center" style="font-size: 10pt"><HR size="1" noshade width="25%" align="center">


<DIV align="center" style="font-size: 24pt"><B>QUANTA SERVICES, INC.</B>
</DIV>

<DIV align="center" style="font-size: 10pt">(Exact name of registrant as specified in charter)</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="47%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="47%">&nbsp;</TD>
</TR>
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<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top">Delaware<BR>
(State or other jurisdiction<BR>
of Incorporation)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">75&#8209;2851603<BR>
(I.R.S. Employer<BR>
Identification No.)</TD>
</TR>

<!-- End Table Body -->
</TABLE>
</DIV>



<P align="center" style="font-size: 10pt">1360 Post Oak Boulevard, Suite&nbsp;2100<BR>
Houston, Texas 77056<BR>
(Address, including zip code, of Principal Executive Offices)


<P align="center" style="font-size: 14pt"><B>QUANTA SERVICES, INC. 1999 EMPLOYEE STOCK PURCHASE PLAN</B>

<DIV align="center" style="font-size: 10pt">(Full title of the Plan)</DIV>


<P align="center" style="font-size: 10pt"><HR size="1" noshade width="25%" align="center">


<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="52%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="25%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
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<TR valign="bottom">
    <TD align="center" valign="top">Dana A. Gordon, Esq.
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Copy to:
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Randall G. Ray, Esq.</TD>
</TR>

<TR valign="bottom">
    <TD align="center" valign="top">Vice President, General Counsel &#038; Secretary
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Gardere Wynne Sewell LLP</TD>
</TR>

<TR valign="bottom">
    <TD align="center" valign="top">Quanta Services, Inc.
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">1601 Elm Street</TD>
</TR>

<TR valign="bottom">
    <TD align="center" valign="top">1360 Post Oak Boulevard, Suite&nbsp;2100
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Suite&nbsp;3000</TD>
</TR>

<TR valign="bottom">
    <TD align="center" valign="top">Houston, Texas 77056
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Dallas, Texas 75201</TD>
</TR>

<TR valign="bottom">
    <TD align="center" valign="top">(713) 629&#8209;7600
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(214) 999&#8209;4544</TD>
</TR>

<TR valign="bottom">
    <TD align="center" valign="top">(Name, address, including zip code, and telephone number,</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>

<TR valign="bottom">
    <TD align="center" valign="top"> including area code, of agent for service)</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>


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</TABLE>
</DIV>


<P align="center" style="font-size: 10pt"><HR size="1" noshade width="25%" align="center">


<P align="center" style="font-size: 10pt"><B>CALCULATION OF REGISTRATION FEE</B><BR>
<HR size="4" noshade width="100%" align="center">


<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="47%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="19%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Proposed maximum</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Proposed maximum</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>&nbsp;</B></TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left"><B>Title of securities</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>Amount to be</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>offering price per</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>aggregate offering</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Amount of</B></TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left"><B>to be registered</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>registered (1)</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>share (2)</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>price (2)</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>registration fee</B></TD>
</TR>

<!-- End Table Head -->
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<TR style="font-size: 1px">
    <TD colspan="15" valign="top" align="left"><HR size="1" noshade>&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Common Stock, $0.00001 Par value
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">1,000,000 shares
</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$6.23</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="right" valign="top">$</TD>
    <TD align="right" valign="top">6,230,000</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="right" valign="top">$</TD>
    <TD align="right" valign="top">789.34</TD>
    <TD nowrap valign="top">&nbsp;</TD>
</TR>

<TR style="font-size: 1px">
    <TD colspan="15" valign="top" align="left"><HR size="4" noshade>&nbsp;</TD>
</TR>

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</TABLE>
</DIV>



<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="4%" nowrap align="left">(1)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Pursuant to Rule&nbsp;416 under the Securities Act of 1933, shares issuable
upon any stock split, stock dividend or similar transaction with respect
to these shares are also being registered hereunder.</TD>
</TR>

</TABLE>

<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="4%" nowrap align="left">(2)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Calculated pursuant to Rule&nbsp;457(h), based on the average of the high and
low prices for the Common Stock as reported on the New York Stock Exchange
Composite Tape for August&nbsp;18, 2004.</TD>
</TR>

</TABLE>

<P align="left" style="font-size: 10pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Shares of Common Stock of the Registrant for issuance upon purchases of
Common Stock under the Plan have been heretofore registered under Registration
Statements on Form&nbsp;S&#8209;8 No.&nbsp;333&#8209;102448, No.&nbsp;333&#8209;105997 and No.&nbsp;333&#8209;86375 of the
Registrant. These shares of Common Stock and the Plan are described in the
Section 10(a) prospectus for this registration statement in accordance with
Rule&nbsp;429 of the General Rules and Regulations under the Securities Act of 1933,
as amended.


<P>
<HR size="1" noshade color="#000000" style="margin-top: -2px">
<HR size="4" noshade color="#000000" style="margin-top: -10px">

</DIV>

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<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<P align="left" style="font-size: 10pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section&nbsp;4.1 of the of the Quanta Services, Inc. 1999 Employee Stock
Purchase Plan (the &#147;Plan&#148;) authorized 1,000,000 shares of Common Stock of the
Company to be issued under the Plan, and provides that the number of shares may
be cumulatively increased on June&nbsp;1, 2000 and each June 1 thereafter by an
amount equal to the lesser of (a)&nbsp;1,000,000 shares or (b)&nbsp;a lesser amount of
shares determined by the Board. A Registration Statement on Form&nbsp;S&#8209;8
(File No.&nbsp;333&#8209;86375) was filed with the Securities and Exchange Commission on
September&nbsp;1, 1999 (the &#147;Initial S&#8209;8&#148;) to register 1,000,000 shares of Common Stock of the
Company relating to the Plan. Subsequent to the filing of the Initial S&#8209;8, the
Board approved a 3&#8209;for&#8209;2 stock split of Common Stock which was paid as a stock
dividend to holders of the Common Stock of record at the close of business on
March&nbsp;27, 2000, which resulted in an additional 500,000 shares of Common Stock
of the Company registered under the Initial S&#8209;8. Additional Registration
Statements on Form&nbsp;S&#8209;8 were filed with the Securities and Exchange Commission
(collectively with the initial S&#8209;8, the &#147;Prior S&#8209;8&#148;) to register additional
shares of Common Stock of the Company that were authorized pursuant to the
terms of the Plan for issuance of Common Stock proceeds under the Plan as
follows:

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="55%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="47%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="47%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center"><B>DATE OF FILING</B><HR size="1" noshade></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>NUMBER OF SHARES REGISTERED</B><HR size="1" noshade></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top">January&nbsp;10, 2003<BR>
June&nbsp;1, 2003
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">1,000,000<BR>
1,000,000</TD>
</TR>

<!-- End Table Body -->
</TABLE>
</DIV>


<P align="left" style="font-size: 10pt">As a result of the filing of the Prior S&#8209;8, 3,500,000 shares of Common
Stock of the Company were registered with respect to the Plan. On June&nbsp;1,
2004, an additional 1,000,000 shares of Common Stock were authorized pursuant
to the terms of the Plan for issuance of Common Stock purchases under the Plan.
The contents of the Prior S&#8209;8, including documents incorporated by reference
therein, are incorporated by reference into this Registration Statement.


<P align="center" style="font-size: 10pt"><B>PART II</B>



<P align="left" style="font-size: 10pt"><B>Item&nbsp;8. Exhibits</B>



<P align="left" style="font-size: 10pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;In addition to the exhibits filed or incorporated by reference into the
Prior S&#8209;8, the following documents are filed as Exhibits to this Registration
Statement:

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="80%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="21%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="74%">&nbsp;</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;&nbsp;5.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Opinion of Gardere Wynne Sewell LLP</TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>

<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">10.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Amendment No.&nbsp;1 to Quanta Services, Inc. 1999 Employee Stock Purchase Plan</TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>

<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of PricewaterhouseCoopers LLP, independent registered public accounting firm</TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>

<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Notice Regarding Consent of Arthur Andersen LLP</TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>

<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.3
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of legal counsel (included as part of Exhibit&nbsp;5.1)</TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>

<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">24.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Power of Attorney (set forth on the signature page of the
Registration Statement)</TD>
</TR>

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</TABLE>
</DIV>



<P align="center" style="font-size: 10pt">II-2
</DIV>

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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">


<P align="center" style="font-size: 10pt">SIGNATURES



<P align="left" style="font-size: 10pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act of 1933, as amended,
the Registrant certifies that it has reasonable grounds to believe that it
meets all of the requirements for filing on Form&nbsp;S&#8209;8 and has duly caused this
Registration Statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of Houston, and the State of Texas, on August&nbsp;20,
2004.

<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top">&nbsp;</TD>
    <TD colspan="3">QUANTA SERVICES, INC.<BR>
(Registrant)<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD>&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000">/s/ John R. Colson
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2">John R. Colson&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2">Chief Executive Officer&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
</TABLE>

<P align="center" style="font-size: 10pt">POWER OF ATTORNEY




<P align="left" style="font-size: 10pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Each of the undersigned hereby appoints John R. Colson and James H. Haddox
and each of them (with full power to act alone), as attorneys and agents for
the undersigned, with full power of substitution, for and in the name, place
and stead of the undersigned, to sign and file with the Securities and Exchange
Commission under the Securities Act of 1933 any and all amendments and exhibits
to this Registration Statement and any and all applications, instruments and other documents to
be filed with the Securities and Exchange Commission pertaining to the
registration of the securities covered hereby, with full power and authority to
do and perform any and all acts and things whatsoever requisite or desirable.


<P align="left" style="font-size: 10pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act of 1933, as amended,
this Registration Statement has been signed below by the following persons in
the capacities indicated on August&nbsp;20, 2004.

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="50%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="67%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center"><B>Signature</B><HR size="1" noshade></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>Title</B><HR size="1" noshade></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>

<TR valign="bottom" style="padding-top: 1em">
    <TD align="center" nowrap valign="top">/s/ John R. Colson<BR>
<HR size="1" noshade>
John R. Colson</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">
Chief Executive Officer and Chairman of the<BR>
Board of Directors<BR>
(principal executive officer)</TD>
</TR>

<TR valign="bottom" style="padding-top: 1em">
    <TD align="center" nowrap valign="top">/s/ James H. Haddox<BR>
<HR size="1" noshade>
James H. Haddox</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">
Chief Financial Officer<BR>
(principal financial officer)</TD>
</TR>

<TR valign="bottom" style="padding-top: 1em">
    <TD align="center" nowrap valign="top">/s/ Derrick A. Jensen<BR>
<HR size="1" noshade>
Derrick A. Jensen</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">
Vice President, Controller and Chief<BR>
Accounting Officer<BR>(principal accounting officer)</TD>
</TR>

<TR valign="bottom" style="padding-top: 1em">
    <TD align="center" nowrap valign="top">/s/ Vincent D. Foster<BR>
<HR size="1" noshade>
Vincent D. Foster</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">
Director</TD>
</TR>

<!-- End Table Body -->
</TABLE>
</DIV>



<P align="center" style="font-size: 10pt">II-3
</DIV>

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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="30%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="25%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center"><B>Signature</B><HR size="1" noshade></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>Title</B><HR size="1" noshade></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>

<TR valign="bottom" style="padding-top: 1em">
    <TD align="center" nowrap valign="top">/s/ James R. Ball<BR>
<HR size="1" noshade>
James R. Ball</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">
Director</TD>
</TR>

<TR valign="bottom" style="padding-top: 1em">
    <TD align="center" nowrap valign="top">/s/ Bernard Fried<BR>
<HR size="1" noshade>
Bernard Fried</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">
Director</TD>
</TR>

<TR valign="bottom" style="padding-top: 1em">
    <TD align="center" nowrap valign="top">/s/ H. Jarrell Gibbs<BR>
<HR size="1" noshade>
H. Jarrell Gibbs</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">
Director</TD>
</TR>

<TR valign="bottom" style="padding-top: 1em">
    <TD align="center" nowrap valign="top">/s/ Louis C. Golm<BR>
<HR size="1" noshade>
Louis C. Golm</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">
Director</TD>
</TR>

<TR valign="bottom" style="padding-top: 1em">
    <TD align="center" nowrap valign="top">/s/ Ben A. Guill<BR>
<HR size="1" noshade>
Ben A. Guill</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">
Director</TD>
</TR>

<TR valign="bottom" style="padding-top: 1em">
    <TD align="center" nowrap valign="top">/s/ Thomas J. Sikorski<BR>
<HR size="1" noshade>
Thomas J. Sikorski</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">
Director</TD>
</TR>

<TR valign="bottom" style="padding-top: 1em">
    <TD align="center" nowrap valign="top">/s/ Gary A. Tucci<BR>
<HR size="1" noshade>
Gary A. Tucci</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">
Director</TD>
</TR>

<TR valign="bottom" style="padding-top: 1em">
    <TD align="center" nowrap valign="top">/s/ John R. Wilson<BR>
<HR size="1" noshade>
John R. Wilson</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">
Director</TD>
</TR>

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</TABLE>
</DIV>



<P align="center" style="font-size: 10pt">II-4
</DIV>

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<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<P align="center" style="font-size: 10pt">INDEX TO EXHIBITS


<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="80%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="21%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="74%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center"><B>Exhibit</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>&nbsp;</B></TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center"><B>Number</B><HR size="1" noshade></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>Exhibit</B><HR size="1" noshade></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;&nbsp;5.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Opinion of Gardere Wynne Sewell LLP</TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>

<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">10.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Amendment No.&nbsp;1 to Quanta Services, Inc. 1999 Employee Stock Purchase Plan</TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>

<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of PricewaterhouseCoopers LLP, independent registered public accounting firm</TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>

<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Notice Regarding Consent of Arthur Andersen LLP</TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>

<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.3
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of legal counsel (included as part of Exhibit&nbsp;5.1)</TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>

<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">24.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Power of Attorney (set forth on the signature page of the
Registration Statement)</TD>
</TR>

<!-- End Table Body -->
</TABLE>
</DIV>



<P align="center" style="font-size: 10pt">II-5
</DIV>

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</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>h17890exv5w1.htm
<DESCRIPTION>OPINION OF GARDERE WYNNE SEWELL LLP
<TEXT>
<HTML>
<HEAD>
<TITLE>exv5w1</TITLE>
</HEAD>
<BODY bgcolor="#FFFFFF">
<!-- PAGEBREAK -->
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<P align="center" style="font-size: 10pt">EXHIBIT 5.1<BR>
&#091;GARDERE LETTERHEAD&#093;



<P align="left" style="font-size: 10pt">August&nbsp;20, 2004



<P align="left" style="font-size: 10pt">Quanta Services, Inc.<BR>
1360 Post Oak Boulevard, Suite&nbsp;2100<BR>
Houston, Texas 77056


<P align="left" style="font-size: 10pt">Ladies and Gentlemen:


<P align="left" style="font-size: 10pt">We have acted as counsel to Quanta Services, Inc., a Delaware corporation (the
&#147;Company&#148;), in connection with the preparation and filing by the company with
the Securities and Exchange Commission of a Registration Statement on Form&nbsp;S&#8209;8
(the &#147;Registration Statement&#148;) under the Securities Act of 1933, as amended
(the &#147;Securities Act&#148;), with respect to an aggregate of 1,000,000 additional
shares of Common Stock, $0.00001 par value (the &#147;Shares&#148;), to be issued
pursuant to the Company&#146;s 1999 Employee Stock Purchase Plan (the &#147;Plan&#148;).

<P align="left" style="font-size: 10pt">With respect to the foregoing, we have examined and have relied upon originals
or copies, certified or otherwise identified to our satisfaction, of such
corporate records, documents, orders, certificates and other instruments as in
our judgment are necessary or appropriate to enable us to render the opinion
expressed below. We have assumed the genuineness of all signatures, the
authenticity of all documents submitted to us as originals, and the conformity
with originals of all documents submitted to us as copies.

<P align="left" style="font-size: 10pt">Based upon the foregoing, we are of the opinion that the Shares that from time
to time may be issued under the Plan in accordance with appropriate proceedings
of the Board of Directors of the Company or a committee thereof pursuant to the
terms of the Plan, when so issued and sold at prices in excess of the par value
of the Shares in accordance with the provisions of the Plan and related
agreements entered into by the Company, will be duly and validly authorized and
issued by the Company and fully paid and non&#8209;assessable.

<P align="left" style="font-size: 10pt">We hereby consent to the filing of this opinion as an Exhibit to the
Registration Statement. In giving this consent, we do not thereby admit that
we are in the category of persons whose consent is required under Section&nbsp;7 of
the Securities Act and the rules and regulations of the Securities and Exchange
Commission thereunder. This opinion letter is expressly limited to the matters
set forth above and we render no opinion, whether by implication or otherwise,
as to any other maters. We assume no obligation to update or supplement this
opinion letter to reflect any facts or circumstances that arise after the date
of this opinion letter and come to our attention, or any future changes in law.

<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
    <TD width="48%">&nbsp;</TD>
</TR>
<TR>
    <TD colspan="3">GARDERE WYNNE SEWELL LLP<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
</TR><TR>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000">/s/ Randall G. Ray
&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD>&nbsp;</TD>
    <TD colspan="2">Randall G. Ray, Partner&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD>&nbsp;</TD>
    <TD colspan="2">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>

</TABLE>

<P align="center" style="font-size: 10pt">II-6
</DIV>

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</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.1
<SEQUENCE>3
<FILENAME>h17890exv10w1.htm
<DESCRIPTION>AMENDMENT NO.1 TO 1999 EMPLOYEE STOCK PURCHASE PLAN
<TEXT>
<HTML>
<HEAD>
<TITLE>exv10w1</TITLE>
</HEAD>
<BODY bgcolor="#FFFFFF">
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<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>
<DIV style="font-family: 'Times New Roman',Times,serif">


<P align="right" style="font-size: 10pt"><B>Exhibit&nbsp;10.1</B>



<P align="center" style="font-size: 10pt"><B>AMENDMENT NO. 1<BR>
TO<BR>
QUANTA SERVICES, INC.<BR>
1999 EMPLOYEE STOCK PURCHASE PLAN</B>



<P align="left" style="font-size: 10pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This Amendment No.&nbsp;1 to the Quanta Services, Inc. 1999 Employee Stock
Purchase Plan (the &#147;Plan&#148;) is adopted by Quanta Services, Inc., a Delaware
corporation (the &#147;Company&#148;), effective as of May&nbsp;20, 2004.


<P align="center" style="font-size: 10pt">WITNESSETH



<P align="left" style="font-size: 10pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;WHEREAS, the Company adopted the Quanta Services, Inc. 1999 Employee Stock
Purchase Plan for the benefit of its eligible employees and the employees of
its participating affiliated companies, effective as of June&nbsp;1, 1999; and


<P align="left" style="font-size: 10pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;WHEREAS, pursuant to Section&nbsp;22 of the Plan and in connection with the
recent adoption of Rule&nbsp;303A.08 by the New York Stock Exchange, the Board of
Directors of the Company (the &#147;Board&#148;) desires to amend the Plan to limit the
term thereof to ten (10)&nbsp;years from its original effective date;


<P align="left" style="font-size: 10pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;NOW THEREFORE, the Board hereby amends Section&nbsp;1.3 of the Plan by
restatement in its entirety to read as follows:


<P align="left" style="font-size: 10pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1.3 Term of Plan. The Plan shall continue in effect until the earlier of
its termination by the Board or May&nbsp;31, 2009.


<P align="left" style="font-size: 10pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This Amendment No.&nbsp;1 to the Plan is adopted by the Company effective as of
the day and year first above written.

<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top">&nbsp;</TD>
    <TD colspan="3">QUANTA SERVICES, INC.<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD>&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000">/s/ Dana A. Gordon
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Name:&nbsp;&nbsp;</TD>
    <TD>Dana A. Gordon&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Title:&nbsp;&nbsp;</TD>
    <TD>Vice President &#038; General Counsel&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
</TABLE>


<P align="center" style="font-size: 10pt">
</DIV>


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</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>4
<FILENAME>h17890exv23w1.htm
<DESCRIPTION>CONSENT OF PRICEWATERHOUSECOOPERS LLP
<TEXT>
<HTML>
<HEAD>
<TITLE>exv23w1</TITLE>
</HEAD>
<BODY bgcolor="#FFFFFF">
<!-- PAGEBREAK -->
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>

</TABLE>

<P align="center" style="font-size: 10pt">EXHIBIT 23.1



<P align="center" style="font-size: 10pt">CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM


<P align="left" style="font-size: 10pt">We hereby consent to the incorporation by reference in this Registration
Statement on Form&nbsp;S&#8209;8 of our report dated March&nbsp;10, 2004, relating to the
consolidated financial statements of Quanta Services, Inc. and its subsidiaries
for the year ended December&nbsp;31, 2003, which appears in the December&nbsp;31, 2003
annual report on Form&nbsp;10&#8209;K of Quanta Services, Inc.


<P align="left" style="font-size: 10pt">/s/ PRICEWATERHOUSECOOPERS LLP<BR>
PricewaterhouseCoopers LLP


<P align="left" style="font-size: 10pt">Houston, Texas<BR>
August&nbsp;20, 2004


<P align="center" style="font-size: 10pt">II-7
</DIV>

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</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.2
<SEQUENCE>5
<FILENAME>h17890exv23w2.htm
<DESCRIPTION>NOTICE REGARDING CONSENT OF ARTHUR ANDERSEN LLP
<TEXT>
<HTML>
<HEAD>
<TITLE>exv23w2</TITLE>
</HEAD>
<BODY bgcolor="#FFFFFF">
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<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<P align="center" style="font-size: 10pt">EXHIBIT 23.2



<P align="center" style="font-size: 10pt">NOTICE REGARDING CONSENT OF ARTHUR ANDERSEN LLP


<P align="left" style="font-size: 10pt">On June&nbsp;28, 2002, the Company dismissed Arthur Andersen LLP (&#147;Arthur Andersen&#148;)
as its independent auditor and appointed PricewaterhouseCoopers LLP to replace
Arthur Andersen. After reasonable efforts, the Company has been unable to
obtain Arthur Andersen&#146;s written consent to the incorporation by reference in
this Registration Statement of Arthur Andersen&#146;s audit reports with respect to
the Company&#146;s financial statements as of December&nbsp;31, 2001 and December&nbsp;31,
2000 and for the years then ended. Under these circumstances, Rule&nbsp;437a of the
Securities Act of 1933, as amended (the &#147;Securities Act&#148;), permits the Company
to file this Registration Statement without a written consent from Arthur
Andersen.

<P align="left" style="font-size: 10pt">Section&nbsp;11(a) of the Securities Act provides that if any part of a registration
statement at the time such part becomes effective contains an untrue statement
of a material fact or omits to state a material fact required to be stated
therein or necessary to make the statements therein not misleading, any person
acquiring a security pursuant to such registration statement (unless it is
proved that at the time of such acquisition such person knew of such untruth or
omission) may sue, among others, every accountant who has consented to be named
as having prepared or certified any part of the registration statement, or as
having prepared or certified any report or valuation which is used in
connection with the registration statement, with respect to the statement in
such registration statement, report, or valuation, which purports to have been
prepared or certified by the accountant.

<P align="left" style="font-size: 10pt">As noted above, Arthur Andersen has not consented to the incorporation by
reference of any audit report in this Registration Statement. As a result,
Arthur Andersen may not be liable under Section 11(a) of the Securities Act to
those persons purchasing shares registered under this Registration Statement.
The Company believes, however, that other persons who are liable under Section
11(a) of the Securities Act, including the Company&#146;s officers and directors,
may still rely on Arthur Andersen&#146;s audit reports as being made by an expert
under the due diligence defense provision of Section 11(b) of the Securities
Act.



<P align="center" style="font-size: 10pt">II-8
</DIV>


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</TEXT>
</DOCUMENT>
</SUBMISSION>
