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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 V3QIrYoCfrOwqX1DpHwkahxilupBi2M+8kw9+feplZazNire6ReBlFjKmC2dGdSF
 TtpNQo87u2ylmV+bzDLntg==

<SEC-DOCUMENT>0000909450-07-000092.txt : 20070712
<SEC-HEADER>0000909450-07-000092.hdr.sgml : 20070712
<ACCEPTANCE-DATETIME>20070712122405
ACCESSION NUMBER:		0000909450-07-000092
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070709
FILED AS OF DATE:		20070712
DATE AS OF CHANGE:		20070712

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:			GRUBER & MCBAINE CAPITAL MANAGEMENT LLC
		CENTRAL INDEX KEY:			0000909450

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-25161
		FILM NUMBER:		07975838

	BUSINESS ADDRESS:	
		STREET 1:		50 OSGOOD PLACE PENTHOUSE
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94133
		BUSINESS PHONE:		4159811039

	MAIL ADDRESS:	
		STREET 1:		50 OSGOOD PLACE
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94133

	FORMER NAME:	
		FORMER CONFORMED NAME:	GRUBER & MCBAINE CAPITAL MANAGEMENT/GRUBER JON D ET AL
		DATE OF NAME CHANGE:	19951108
</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>2007-07-09</periodOfReport>

    <dateOfOriginalSubmission>2007-07-11</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000909450</rptOwnerCik>
            <rptOwnerName>GRUBER &amp; MCBAINE CAPITAL MANAGEMENT LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>50 OSGOOD PLACE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94133</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>2007-07-09</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>25000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2.66</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2389938</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Limited Partnership and Investment Advisory Accounts</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This form is filed by Gruber &amp; McBaine Capital Management, LLC (GMCM), a limited liability company that is an investment adviser for client accounts and a general partner of investment limited partnerships; Jon D. Gruber (Gruber) and J. Patterson McBaine (McBaine), who are managers,members and portfolio managers of GMCM; Eric B Swergold (Swergold) who is a member and portfolio manager of GMCM who is a member and portfolio advisor of GMCM.</footnote>
        <footnote id="F2">This total is the number of shares beneficially owned after the transactions reported in accounts and investment partnerships in which the reporting persons have some pecuniary interest; the total excludes shares held in other client accounts managed by GMCM in which the reporting persons have no pecuniary interest.</footnote>
        <footnote id="F3">By GMCM, as an investment adviser for client accounts and a general partner of investment partnerships,and by Gruber and McBaine as managers, members and portfolio managers of GMCM, and by Swergold as a member and portfolio manager of GMCM. GMCM, Gruber, McBaine, and Swergold have pecuniary interest in those client accounts and partnerships that in the aggregate represent less than the total number of shares shown in Items 4 and 5. Each such reporting person disclaims beneficial ownership of the securities with respect to which indirect beneficial ownership is reported, except to the extent of that reporting persons pro rata pecuniary interest therein.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>GRUBER &amp; MCBAINE CAPITAL MANAGEMENT,LLC  By: /s/ J. Patterson McBaine, J.Patterson McBaine, Manager</signatureName>
        <signatureDate>2007-07-12</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Jon D. Gruber</signatureName>
        <signatureDate>2007-07-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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