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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 HSgn6ypZTONnusucFnCZ5H2OYHBlY6iAHQWge+J+1fiAoll7VOK3rwucFyZZw0xh
 4Vu5xaCcbEUesbZYbl0jDA==

<SEC-DOCUMENT>0001080710-06-000005.txt : 20060530
<SEC-HEADER>0001080710-06-000005.hdr.sgml : 20060529
<ACCEPTANCE-DATETIME>20060530135915
ACCESSION NUMBER:		0001080710-06-000005
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20060524
FILED AS OF DATE:		20060530
DATE AS OF CHANGE:		20060530

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MODTECH HOLDINGS INC
		CENTRAL INDEX KEY:			0001075066
		STANDARD INDUSTRIAL CLASSIFICATION:	PREFABRICATED WOOD BLDGS & COMPONENTS [2452]
		IRS NUMBER:				330825386
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2830 BARRETT AVE
		STREET 2:		PO BOX 1240
		CITY:			PERRIS
		STATE:			CA
		ZIP:			92571
		BUSINESS PHONE:		9099434014

	MAIL ADDRESS:	
		STREET 1:		4675 MACARTHUR CT.,
		STREET 2:		SUITE 710
		CITY:			NEWPORT
		STATE:			CA
		ZIP:			92660

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CAMPBELL ROBERT W
		CENTRAL INDEX KEY:			0001080710

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-25161
		FILM NUMBER:		06873226

	BUSINESS ADDRESS:	
		STREET 1:		3333 MICHELSON DRIVE #650
		CITY:			IRVINE
		STATE:			CA
		ZIP:			92614
		BUSINESS PHONE:		9498529911

	MAIL ADDRESS:	
		STREET 1:		4675 MACARTHUR COURT
		STREET 2:		SUITE 1500
		CITY:			NEWPORT BEACH
		STATE:			CA
		ZIP:			92660
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2006-05-24</periodOfReport>

    <dateOfOriginalSubmission>2006-05-26</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001075066</issuerCik>
        <issuerName>MODTECH HOLDINGS INC</issuerName>
        <issuerTradingSymbol>MODT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001080710</rptOwnerCik>
            <rptOwnerName>CAMPBELL ROBERT W</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>4675 MACARTHUR COURT</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 1500</rptOwnerStreet2>
            <rptOwnerCity>NEWPORT BEACH</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92660</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</value>
            </securityTitle>
            <transactionDate>
                <value>2006-05-24</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3415</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>8.91</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>43082</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <remarks>Form 4A is filed to amend Accession Number 0001080710-06-000003 for filing on May 26, 2006.  Address of Reporting Owenr has been updated, and price of securities disposed of has been amended.</remarks>

    <ownerSignature>
        <signatureName>Robert W. Campbell</signatureName>
        <signatureDate>2006-05-30</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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