<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:iso4217="http://www.xbrl.org/2003/iso4217"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="jfb-20251231.xsd" xlink:type="simple"/>
    <context id="From2025-01-01to2025-12-31">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002024306</identifier>
        </entity>
        <period>
            <startDate>2025-01-01</startDate>
            <endDate>2025-12-31</endDate>
        </period>
    </context>
    <context id="AsOf2025-06-30">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002024306</identifier>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="AsOf2026-03-31">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002024306</identifier>
        </entity>
        <period>
            <instant>2026-03-31</instant>
        </period>
    </context>
    <unit id="USD">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="Shares">
        <measure>shares</measure>
    </unit>
    <dei:AmendmentFlag contextRef="From2025-01-01to2025-12-31" id="Fact000003">true</dei:AmendmentFlag>
    <dei:DocumentFiscalPeriodFocus contextRef="From2025-01-01to2025-12-31" id="Fact000004">FY</dei:DocumentFiscalPeriodFocus>
    <dei:EntityCentralIndexKey contextRef="From2025-01-01to2025-12-31" id="Fact000005">0002024306</dei:EntityCentralIndexKey>
    <dei:DocumentType contextRef="From2025-01-01to2025-12-31" id="Fact000011">10-K/A</dei:DocumentType>
    <dei:DocumentAnnualReport contextRef="From2025-01-01to2025-12-31" id="Fact000012">true</dei:DocumentAnnualReport>
    <dei:DocumentPeriodEndDate contextRef="From2025-01-01to2025-12-31" id="Fact000013">2025-12-31</dei:DocumentPeriodEndDate>
    <dei:CurrentFiscalYearEndDate contextRef="From2025-01-01to2025-12-31" id="Fact000014">--12-31</dei:CurrentFiscalYearEndDate>
    <dei:DocumentFiscalYearFocus contextRef="From2025-01-01to2025-12-31" id="Fact000015">2025</dei:DocumentFiscalYearFocus>
    <dei:DocumentTransitionReport contextRef="From2025-01-01to2025-12-31" id="Fact000016">false</dei:DocumentTransitionReport>
    <dei:EntityFileNumber contextRef="From2025-01-01to2025-12-31" id="Fact000017">001-42538</dei:EntityFileNumber>
    <dei:EntityRegistrantName contextRef="From2025-01-01to2025-12-31" id="Fact000018">JFB CONSTRUCTION HOLDINGS</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode contextRef="From2025-01-01to2025-12-31" id="Fact000019">NV</dei:EntityIncorporationStateCountryCode>
    <dei:EntityTaxIdentificationNumber contextRef="From2025-01-01to2025-12-31" id="Fact000020">99-2549040</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1 contextRef="From2025-01-01to2025-12-31" id="Fact000021">1300                                             S. Dixie Highway</dei:EntityAddressAddressLine1>
    <dei:EntityAddressAddressLine2 contextRef="From2025-01-01to2025-12-31" id="Fact000022">Suite B</dei:EntityAddressAddressLine2>
    <dei:EntityAddressCityOrTown contextRef="From2025-01-01to2025-12-31" id="Fact000023">Lantana</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince contextRef="From2025-01-01to2025-12-31" id="Fact000024">FL</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode contextRef="From2025-01-01to2025-12-31" id="Fact000025">33462</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode contextRef="From2025-01-01to2025-12-31" id="Fact000026">(561)</dei:CityAreaCode>
    <dei:LocalPhoneNumber contextRef="From2025-01-01to2025-12-31" id="Fact000027">582-9840</dei:LocalPhoneNumber>
    <dei:Security12bTitle contextRef="From2025-01-01to2025-12-31" id="Fact000028">Class     A Common Stock,par value $0.0001per share</dei:Security12bTitle>
    <dei:TradingSymbol contextRef="From2025-01-01to2025-12-31" id="Fact000029">JFB</dei:TradingSymbol>
    <dei:SecurityExchangeName contextRef="From2025-01-01to2025-12-31" id="Fact000030">NASDAQ</dei:SecurityExchangeName>
    <dei:EntityWellKnownSeasonedIssuer contextRef="From2025-01-01to2025-12-31" id="Fact000031">No</dei:EntityWellKnownSeasonedIssuer>
    <dei:EntityVoluntaryFilers contextRef="From2025-01-01to2025-12-31" id="Fact000032">Yes</dei:EntityVoluntaryFilers>
    <dei:EntityCurrentReportingStatus contextRef="From2025-01-01to2025-12-31" id="Fact000033">Yes</dei:EntityCurrentReportingStatus>
    <dei:EntityInteractiveDataCurrent contextRef="From2025-01-01to2025-12-31" id="Fact000034">Yes</dei:EntityInteractiveDataCurrent>
    <dei:EntityFilerCategory contextRef="From2025-01-01to2025-12-31" id="Fact000035">Non-accelerated Filer</dei:EntityFilerCategory>
    <dei:EntitySmallBusiness contextRef="From2025-01-01to2025-12-31" id="Fact000036">true</dei:EntitySmallBusiness>
    <dei:EntityEmergingGrowthCompany contextRef="From2025-01-01to2025-12-31" id="Fact000037">true</dei:EntityEmergingGrowthCompany>
    <dei:EntityExTransitionPeriod contextRef="From2025-01-01to2025-12-31" id="Fact000038">false</dei:EntityExTransitionPeriod>
    <dei:IcfrAuditorAttestationFlag contextRef="From2025-01-01to2025-12-31" id="Fact000039">false</dei:IcfrAuditorAttestationFlag>
    <dei:DocumentFinStmtErrorCorrectionFlag contextRef="From2025-01-01to2025-12-31" id="Fact000040">false</dei:DocumentFinStmtErrorCorrectionFlag>
    <dei:EntityShellCompany contextRef="From2025-01-01to2025-12-31" id="Fact000041">false</dei:EntityShellCompany>
    <dei:EntityPublicFloat
      contextRef="AsOf2025-06-30"
      decimals="0"
      id="Fact000042"
      unitRef="USD">12440230</dei:EntityPublicFloat>
    <dei:EntityCommonStockSharesOutstanding
      contextRef="AsOf2026-03-31"
      decimals="INF"
      id="Fact000043"
      unitRef="Shares">14207900</dei:EntityCommonStockSharesOutstanding>
    <dei:AmendmentDescription contextRef="From2025-01-01to2025-12-31" id="Fact000045">This
Amendment No. 1 (&#x201c;Amendment&#x201d;) on Form 10-K/A amends the annual report on Form 10-K of JFB Construction Holdings (the &#x201c;Company&#x201d;)
for the period ended December 31, 2025, as filed with the Securities and Exchange Commission on March 31, 2026 (the &#x201c;Form 10-K&#x201d;).This
Amendment is an exhibit-only filing solely for the purpose of filing Exhibit 97.1. No revisions are being made to the Company&#x2019;s
financial statements and this Amendment does not reflect events occurring after the filing of the Form 10-K, or modify or update those
disclosures that may be affected by subsequent events, and no other changes are being made to any other disclosure contained in the Form
10-K.</dei:AmendmentDescription>
</xbrl>
