-----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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 IDleSrBdeV3kW9rqpKQjJw==

<SEC-DOCUMENT>0000901719-03-000007.txt : 20030630
<SEC-HEADER>0000901719-03-000007.hdr.sgml : 20030630
<ACCEPTANCE-DATETIME>20030630142610
ACCESSION NUMBER:		0000901719-03-000007
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030630
FILED AS OF DATE:		20030630

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MISSION WEST PROPERTIES INC
		CENTRAL INDEX KEY:			0001067419
		STANDARD INDUSTRIAL CLASSIFICATION:	REAL ESTATE INVESTMENT TRUSTS [6798]
		IRS NUMBER:				952635431
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		10050 BANDLEY DRIVE
		CITY:			CUPERTINO
		STATE:			CA
		ZIP:			95014
		BUSINESS PHONE:		4087250700

	MAIL ADDRESS:	
		STREET 1:		10050 BANDLEY DR
		CITY:			CUPERTINO
		STATE:			CA
		ZIP:			95014

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BERG CARL E
		CENTRAL INDEX KEY:			0000901719
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-25235
		FILM NUMBER:		03763782

	BUSINESS ADDRESS:	
		STREET 1:		BERG & BERG DEVELOPERS
		STREET 2:		10050 BANDLEY DRIVE
		CITY:			CUPERTINO
		STATE:			CA
		ZIP:			95014
		BUSINESS PHONE:		4087250700

	MAIL ADDRESS:	
		STREET 1:		C/O BERG & BERG DEVELOPERS
		STREET 2:		10050 BANDLEY DR
		CITY:			CUPERTINO
		STATE:			CA
		ZIP:			95014
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>

<ownershipDocument>

    <documentType>4</documentType>

    <periodOfReport>2003-06-30</periodOfReport>


    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001067419</issuerCik>
        <issuerName>MISSION WEST PROPERTIES INC</issuerName>
        <issuerTradingSymbol>MSW</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000901719</rptOwnerCik>
            <rptOwnerName>BERG CARL E</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chairman, CEO, and Director</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeSecurity>
        <securityTitle>
            <value>Common Stock</value>
        </securityTitle>
        <transactionDate>
            <value>2003-06-30</value>
            <footnoteId id="F1"/>
            <footnoteId id="F2"/>
        </transactionDate>
        <deemedExecutionDate>
            <value>2003-06-30</value>
            <footnoteId id="F1"/>
            <footnoteId id="F2"/>
        </deemedExecutionDate>
        <transactionCoding>
            <transactionFormType>4</transactionFormType>
            <transactionCode>G</transactionCode>
            <equitySwapInvolved>0</equitySwapInvolved>
            <footnoteId id="F1"/>
            <footnoteId id="F2"/>
        </transactionCoding>
        <transactionTimeliness>
            <value></value>
        </transactionTimeliness>
        <transactionAmounts>
            <transactionShares>
                <value>7650</value>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
            </transactionShares>
            <transactionValue>
                <value>0</value>
            </transactionValue>
            <transactionAcquiredDisposedCode>
                <value>D</value>
            </transactionAcquiredDisposedCode>
        </transactionAmounts>
        <postTransactionAmounts>
            <sharesOwnedFollowingTransaction>
                <value>0</value>
            </sharesOwnedFollowingTransaction>
        </postTransactionAmounts>
        <ownershipNature>
            <directOrIndirectOwnership>
                <value>D</value>
            </directOrIndirectOwnership>
        </ownershipNature>
    </nonDerivativeSecurity>

    <derivativeSecurity>
        <securityTitle>
            <value>Limited Partnership Units (LP Units)</value>
            <footnoteId id="F5"/>
            <footnoteId id="F6"/>
            <footnoteId id="F7"/>
        </securityTitle>
        <conversionOrExercisePrice>
            <value>0</value>
            <footnoteId id="F3"/>
        </conversionOrExercisePrice>
        <transactionDate>
            <value>1988-08-08</value>
            <footnoteId id="F4"/>
        </transactionDate>
        <transactionCoding>
            <transactionFormType>4</transactionFormType>
            <transactionCode>P</transactionCode>
            <equitySwapInvolved>0</equitySwapInvolved>
            <footnoteId id="F4"/>
        </transactionCoding>
        <transactionTimeliness>
            <value></value>
        </transactionTimeliness>
        <transactionAmounts>
            <transactionShares>
                <value>0</value>
                <footnoteId id="F4"/>
            </transactionShares>
            <transactionValue>
                <value>0</value>
                <footnoteId id="F3"/>
            </transactionValue>
            <transactionAcquiredDisposedCode>
                <value>A</value>
            </transactionAcquiredDisposedCode>
        </transactionAmounts>
        <exerciseDate>
            <value>1998-08-08</value>
            <footnoteId id="F10"/>
        </exerciseDate>
        <expirationDate>
            <value>1998-08-08</value>
            <footnoteId id="F9"/>
        </expirationDate>
        <underlyingSecurity>
            <underlyingSecurityTitle>
                <value>Limited Partnership Units (LP Units)</value>
                <footnoteId id="F5"/>
                <footnoteId id="F6"/>
                <footnoteId id="F7"/>
            </underlyingSecurityTitle>
            <underlyingSecurityShares>
                <value>0</value>
                <footnoteId id="F4"/>
            </underlyingSecurityShares>
        </underlyingSecurity>
        <postTransactionAmounts>
            <sharesOwnedFollowingTransaction>
                <value>33791499</value>
                <footnoteId id="F8"/>
            </sharesOwnedFollowingTransaction>
        </postTransactionAmounts>
        <ownershipNature>
            <directOrIndirectOwnership>
                <value>D</value>
            </directOrIndirectOwnership>
        </ownershipNature>
    </derivativeSecurity>

    <derivativeSecurity>
        <securityTitle>
            <value>Limited Partnership Units (LP Units)</value>
            <footnoteId id="F5"/>
            <footnoteId id="F6"/>
            <footnoteId id="F7"/>
        </securityTitle>
        <conversionOrExercisePrice>
            <value>0</value>
            <footnoteId id="F3"/>
        </conversionOrExercisePrice>
        <transactionDate>
            <value>1998-08-08</value>
            <footnoteId id="F4"/>
        </transactionDate>
        <transactionCoding>
            <transactionFormType>4</transactionFormType>
            <transactionCode>P</transactionCode>
            <equitySwapInvolved>0</equitySwapInvolved>
            <footnoteId id="F4"/>
        </transactionCoding>
        <transactionTimeliness>
            <value></value>
        </transactionTimeliness>
        <transactionAmounts>
            <transactionShares>
                <value>0</value>
                <footnoteId id="F4"/>
            </transactionShares>
            <transactionValue>
                <value>0</value>
                <footnoteId id="F3"/>
            </transactionValue>
            <transactionAcquiredDisposedCode>
                <value>A</value>
            </transactionAcquiredDisposedCode>
        </transactionAmounts>
        <exerciseDate>
            <value>1998-08-08</value>
            <footnoteId id="F10"/>
        </exerciseDate>
        <expirationDate>
            <value>1998-08-08</value>
            <footnoteId id="F9"/>
        </expirationDate>
        <underlyingSecurity>
            <underlyingSecurityTitle>
                <value>Limited Partnership Units (LP Units)</value>
                <footnoteId id="F5"/>
                <footnoteId id="F6"/>
                <footnoteId id="F7"/>
            </underlyingSecurityTitle>
            <underlyingSecurityShares>
                <value>0</value>
                <footnoteId id="F4"/>
            </underlyingSecurityShares>
        </underlyingSecurity>
        <postTransactionAmounts>
            <sharesOwnedFollowingTransaction>
                <value>10789383</value>
                <footnoteId id="F11"/>
            </sharesOwnedFollowingTransaction>
        </postTransactionAmounts>
        <ownershipNature>
            <directOrIndirectOwnership>
                <value>D</value>
            </directOrIndirectOwnership>
        </ownershipNature>
    </derivativeSecurity>

    <derivativeSecurity>
        <securityTitle>
            <value>Limited Partnerhsip Units (LP Units)</value>
            <footnoteId id="F5"/>
            <footnoteId id="F6"/>
            <footnoteId id="F7"/>
        </securityTitle>
        <conversionOrExercisePrice>
            <value>0</value>
            <footnoteId id="F3"/>
        </conversionOrExercisePrice>
        <transactionDate>
            <value>1998-08-08</value>
            <footnoteId id="F4"/>
        </transactionDate>
        <transactionCoding>
            <transactionFormType>4</transactionFormType>
            <transactionCode>P</transactionCode>
            <equitySwapInvolved>0</equitySwapInvolved>
            <footnoteId id="F4"/>
        </transactionCoding>
        <transactionTimeliness>
            <value></value>
        </transactionTimeliness>
        <transactionAmounts>
            <transactionShares>
                <value>0</value>
                <footnoteId id="F4"/>
            </transactionShares>
            <transactionValue>
                <value>0</value>
                <footnoteId id="F3"/>
            </transactionValue>
            <transactionAcquiredDisposedCode>
                <value>A</value>
            </transactionAcquiredDisposedCode>
        </transactionAmounts>
        <exerciseDate>
            <value>1998-08-08</value>
            <footnoteId id="F10"/>
        </exerciseDate>
        <expirationDate>
            <value>1998-08-08</value>
            <footnoteId id="F9"/>
        </expirationDate>
        <underlyingSecurity>
            <underlyingSecurityTitle>
                <value>Limited Partnership Units (LP Units)</value>
                <footnoteId id="F5"/>
                <footnoteId id="F6"/>
                <footnoteId id="F7"/>
            </underlyingSecurityTitle>
            <underlyingSecurityShares>
                <value>0</value>
                <footnoteId id="F4"/>
            </underlyingSecurityShares>
        </underlyingSecurity>
        <postTransactionAmounts>
            <sharesOwnedFollowingTransaction>
                <value>196428</value>
                <footnoteId id="F12"/>
                <footnoteId id="F13"/>
            </sharesOwnedFollowingTransaction>
        </postTransactionAmounts>
        <ownershipNature>
            <directOrIndirectOwnership>
                <value>D</value>
            </directOrIndirectOwnership>
        </ownershipNature>
    </derivativeSecurity>

    <footnotes>
        <footnote id="F1">These securities are owned by Carl E. Berg, the designated beneficial owner for the reporting group.  On June 30, 2003, Carl E. Berg donated 7,650 shares of Common Stock to a qualifying charitable organization</footnote>
        <footnote id="F2">On June 30, 2003, Carl E. Berg donated 7,650 shares of Common Stock to a qualifying charitable organization.</footnote>
        <footnote id="F3">Convertible to common stock on a 1:1 basis.</footnote>
        <footnote id="F4">There were no derivative security transactions.</footnote>
        <footnote id="F5">These LP Units were acquired in exchange for real property sold to the Company per existing agreements with the Company including the Pending Projects Acquisition Agreement and the Berg Land Holdings Option Agreement both dated as of December 29, 1998 (the &quot;Land Option Agreement&quot;).</footnote>
        <footnote id="F6">LP Units became exchangeable for Common Stock on December 29, 1999 under the Exchange Rights Agreement Dated December 28, 1998 between the Company and the entities holding the LP Units.  LP Units may be exchanged for an equal number of shares of the Company's Common Stock, or at the election of the Company, cash equal to the fair market value of the shares.  These reporting persons and other reporting persons who are &quot;Berg Group&quot; members are subject to an aggregate ownership limit equal to 20% of the outstanding shares of Common Stock, which represents a conversion cap on the total number of shares that can be acquired by any reporting persons and all of these reporting persons combined.</footnote>
        <footnote id="F7">The conversion cap limited the acquisition of the underlying securities as of December 29, 1999.

LP Units were valued based on the purchase price of the acquired property with the value of each unit equal to the fair market value of the Common Stock under the Land Option Agreement.</footnote>
        <footnote id="F8">The LP Units are owned by Carl E. Berg, the designated beneficial owner for the reporting group.</footnote>
        <footnote id="F9">Not applicable.</footnote>
        <footnote id="F10">Not applicable.</footnote>
        <footnote id="F11">These LP Units are owned by Berg &amp; Berg Enterprises, Inc., a member of the reporting group.</footnote>
        <footnote id="F12">These LP Units are owned by Berg &amp; Berg Enterprises, LLC, a member of the reporting group.</footnote>
        <footnote id="F13">The designated beneficial owner disclaims beneficial ownership of all securities reported on thie Form 4.  All reporting persons disclaim beneficial ownership of all securities except to the extent of their respective pecuniary interests therein.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Carl E. Berg</signatureName>
        <signatureDate>2003-06-30</signatureDate>
    </ownerSignature>

</ownershipDocument>

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