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

    <schemaVersion>X0708</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0002039321</cik>
        <entityName>Arch Street Project LLC</entityName>
        <issuerAddress>
            <street1>805 W IDAHO ST.</street1>
            <street2>SUITE 202</street2>
            <city>BOISE</city>
            <stateOrCountry>ID</stateOrCountry>
            <stateOrCountryDescription>IDAHO</stateOrCountryDescription>
            <zipCode>83702</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>2085731877</issuerPhoneNumber>
        <jurisdictionOfInc>IDAHO</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Limited Liability Company</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2024</value>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Robert</firstName>
                <lastName>Frazier</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>805 W. Idaho St.</street1>
                <street2>Suite 202</street2>
                <city>Boise</city>
                <stateOrCountry>ID</stateOrCountry>
                <stateOrCountryDescription>IDAHO</stateOrCountryDescription>
                <zipCode>83702</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Robert Frazier is a Manager and COO of SCDM Development LLC, the sole member of West Bench Capital Investment Fund LLC, which is one of two Managers of Arch Street Project LLC (Issuer). Robert is also the CEO of West Bench Capital Investment Fund LLC.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Corby</firstName>
                <lastName>Goade</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>2309 Mountain View Dr.</street1>
                <street2>Suite 125</street2>
                <city>Boise</city>
                <stateOrCountry>ID</stateOrCountry>
                <stateOrCountryDescription>IDAHO</stateOrCountryDescription>
                <zipCode>83706</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Corby Goade is the sole-member of Stirling Development, LLC which is one of two Managers of Arch Street Project LLC (Issuer).</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>John</firstName>
                <lastName>Frazier</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>11166 W. Chickadee St.</street1>
                <city>Boise</city>
                <stateOrCountry>ID</stateOrCountry>
                <stateOrCountryDescription>IDAHO</stateOrCountryDescription>
                <zipCode>83709</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>John Frazier is a Manager and the CEO of SCDM Development LLC. SCDM Development LLC is the sole member of West Bench Capital Investment Fund LLC, which is one of two Managers of Arch Street Project LLC (Issuer).</relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Other Real Estate</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>No Revenues</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06c</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2024-09-30</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>10000</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>1500000</totalOfferingAmount>
            <totalAmountSold>125000</totalAmountSold>
            <totalRemaining>1375000</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>2</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>339487</dollarAmount>
                <isEstimate>true</isEstimate>
            </grossProceedsUsed>
            <clarificationOfResponse>Each Manager receives $6000 as onetime compensation &amp; additionally may elect to collectively be paid: 1% of the purchase price of real property acquired; 3% of total construction costs; $10000 real estate due diligence fee; 2% lending acquisition fee.</clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>Arch Street Project LLC</issuerName>
                <signatureName>Grant M. Patton</signatureName>
                <nameOfSigner>Grant M. Patton</nameOfSigner>
                <signatureTitle>By POA from Arch Street Project LLC</signatureTitle>
                <signatureDate>2024-10-01</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
