-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Ra8GkMnhmbjpDQPjJ0sAlCZLStgCGJXA/7ok3I2WprFBRd/3CKLknX4dF1DSDGOb
 g+RLsEV0qq62WJGdTgK/IQ==

<SEC-DOCUMENT>0001209191-09-048672.txt : 20091015
<SEC-HEADER>0001209191-09-048672.hdr.sgml : 20091015
<ACCEPTANCE-DATETIME>20091015113356
ACCESSION NUMBER:		0001209191-09-048672
CONFORMED SUBMISSION TYPE:	D
PUBLIC DOCUMENT COUNT:		1
ITEM INFORMATION:		Rule 506
FILED AS OF DATE:		20091015
DATE AS OF CHANGE:		20091015
EFFECTIVENESS DATE:		20091015

FILER:

	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

	FILING VALUES:
		FORM TYPE:		D
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-135309
		FILM NUMBER:		091120747

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>D
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
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<edgarSubmission>

    <schemaVersion>X0603</schemaVersion>

    <submissionType>D</submissionType>

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        <cik>0001050915</cik>
        <entityName>QUANTA SERVICES INC</entityName>
        <issuerAddress>
            <street1>1360 Post Oak Blvd., Suite 2100</street1>
            <city>Houston</city>
            <stateOrCountry>TX</stateOrCountry>
            <zipCode>77056</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>(713) 629-7600</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</jurisdictionOfInc>
        <issuerPreviousNameList>
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        <entityType>Corporation</entityType>
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            <overFiveYears>true</overFiveYears>
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    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>John</firstName>
                <middleName>R</middleName>
                <lastName>Colson</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1360 Post Oak Blvd., Suite 2100</street1>
                <city>Houston</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>77056</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Chief Executive Officer, Chairman of the Board of Directors</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>James</firstName>
                <middleName>H</middleName>
                <lastName>Haddox</lastName>
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            <relatedPersonAddress>
                <street1>1360 Post Oak Blvd., Suite 2100</street1>
                <city>Houston</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>77056</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Chief Financial Officer</relationshipClarification>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>John</firstName>
                <middleName>R</middleName>
                <lastName>Wilson</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1360 Post Oak Blvd., Suite 2100</street1>
                <city>Houston</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>77056</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>President - Electric Power,  Director</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Kenneth</firstName>
                <middleName>W</middleName>
                <lastName>Trawick</lastName>
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            <relatedPersonAddress>
                <street1>1360 Post Oak Blvd., Suite 2100</street1>
                <city>Houston</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>77056</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>President - Telecommunications and Cable Television Division</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Tana</firstName>
                <middleName>L</middleName>
                <lastName>Pool</lastName>
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            <relatedPersonAddress>
                <street1>1360 Post Oak Blvd., Suite 2100</street1>
                <city>Houston</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>77056</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Vice President and General Counsel</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Derrick</firstName>
                <middleName>A</middleName>
                <lastName>Jensen</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1360 Post Oak Blvd., Suite 2100</street1>
                <city>Houston</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>77056</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Vice President and Chief Accounting Officer</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Nicholas</firstName>
                <middleName>M</middleName>
                <lastName>Grindstaff</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1360 Post Oak Blvd., Suite 2100</street1>
                <city>Houston</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>77056</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Treasurer</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Benadetto</firstName>
                <middleName>G</middleName>
                <lastName>Bosco</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1360 Post Oak Blvd., Suite 2100</street1>
                <city>Houston</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>77056</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Senior Vice President - Business Development and Outsourcing</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>James</firstName>
                <middleName>F</middleName>
                <lastName>O'Neil III</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1360 Post Oak Blvd., Suite 2100</street1>
                <city>Houston</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>77056</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>President and Chief Operating Officer</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Darren</firstName>
                <middleName>B</middleName>
                <lastName>Miller</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1360 Post Oak Blvd., Suite 2100</street1>
                <city>Houston</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>77056</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Vice President - Information Technology and Administration</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>James</firstName>
                <middleName>R</middleName>
                <lastName>Ball</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1360 Post Oak Blvd., Suite 2100</street1>
                <city>Houston</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>77056</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Bruce</firstName>
                <lastName>Ranck</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1360 Post Oak Blvd., Suite 2100</street1>
                <city>Houston</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>77056</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>J</firstName>
                <middleName>Michal</middleName>
                <lastName>Conaway</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1360 Post Oak Blvd., Suite 2100</street1>
                <city>Houston</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>77056</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Ralph</firstName>
                <middleName>R</middleName>
                <lastName>DiSibio</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1360 Post Oak Blvd., Suite 2100</street1>
                <city>Houston</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>77056</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Vincent</firstName>
                <middleName>D</middleName>
                <lastName>Foster</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1360 Post Oak Blvd., Suite 2100</street1>
                <city>Houston</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>77056</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Bernard</firstName>
                <lastName>Fried</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1360 Post Oak Blvd., Suite 2100</street1>
                <city>Houston</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>77056</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Louis</firstName>
                <middleName>C</middleName>
                <lastName>Golm</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1360 Post Oak Blvd., Suite 2100</street1>
                <city>Houston</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>77056</zipCode>
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            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
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            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Pat</firstName>
                <lastName>Wood III</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1360 Post Oak Blvd., Suite 2100</street1>
                <city>Houston</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>77056</zipCode>
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            <relatedPersonRelationshipList>
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            <relationshipClarification></relationshipClarification>
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                <firstName>Worthing</firstName>
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                <lastName>Jackman</lastName>
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                <street1>1360 Post Oak Blvd., Suite 2100</street1>
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            <relatedPersonRelationshipList>
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            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Earl</firstName>
                <middleName>C</middleName>
                <lastName>Austin</lastName>
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                <city>Houston</city>
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                <zipCode>77056</zipCode>
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            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>President - Natural Gas and Pipeline Division</relationshipClarification>
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    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Other Energy</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Over $100,000,000</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2009-10-01</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>true</isBusinessCombinationTransaction>
            <clarificationOfResponse>Merger Consideration</clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>246410780</totalOfferingAmount>
            <totalAmountSold>246410780</totalAmountSold>
            <totalRemaining>0</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>23</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
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                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse></clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>Quanta Services Inc</issuerName>
                <signatureName>/s/ TANA L. POOL</signatureName>
                <nameOfSigner>Tana L. Pool</nameOfSigner>
                <signatureTitle>Vice President and General Counsel</signatureTitle>
                <signatureDate>2009-10-15</signatureDate>
            </signature>
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</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----