<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2006-04-13</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000731245</issuerCik>
        <issuerName>PRESIDENTIAL REALTY CORP/DE/</issuerName>
        <issuerTradingSymbol>PDLA, PDLB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001205255</rptOwnerCik>
            <rptOwnerName>CAPLIN MORTIMER M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>DANAHER CORP</rptOwnerStreet1>
            <rptOwnerStreet2>2099 PENNSYLVANIA AVE NW 12TH FL</rptOwnerStreet2>
            <rptOwnerCity>WASHINGON</rptOwnerCity>
            <rptOwnerState>DC</rptOwnerState>
            <rptOwnerZipCode>20006</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>PRESIDENTIAL REALTY CORP. CLASS B COMMON</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>PRESIDENTIAL REALTY CORP. CLASS B COMMON</value>
            </securityTitle>
            <transactionDate>
                <value>2006-04-13</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>3000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>6.6</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>38091</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Sanford Bernstein Custodian Rollover of M. Caplin</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>PRESIDENTIAL REALTY CORP. CLASS B COMMON</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>47775</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Caplin Foundation</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Mr. Caplin disclaims beneficial ownership of the shares of Class B Common Stock owned by the Caplin Foundation.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Mortimer M. Caplin</signatureName>
        <signatureDate>2006-04-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
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X0202
4
2006-04-13
0
0000731245
PRESIDENTIAL REALTY CORP/DE/
PDLA, PDLB
0001205255
CAPLIN MORTIMER M
DANAHER CORP
2099 PENNSYLVANIA AVE NW 12TH FL
WASHINGON
DC
20006
1
0
0
0
PRESIDENTIAL REALTY CORP. CLASS B COMMON
3000
D
PRESIDENTIAL REALTY CORP. CLASS B COMMON
2006-04-13
4
P
0
3000
6.6
A
38091
I
Sanford Bernstein Custodian Rollover of M. Caplin
PRESIDENTIAL REALTY CORP. CLASS B COMMON
47775
I
Caplin Foundation
Mr. Caplin disclaims beneficial ownership of the shares of Class B Common Stock owned by the Caplin Foundation.
Mortimer M. Caplin
2006-04-17