State FBH approval lane
Understand what California HCD Factory-Built Housing plan approval and insignia logic means for this product before comparing it to generic prefab ADU quotes.
Read state approval pageApproval boundary
State approval evidence and city approval reality, separated clearly.
The supplied plan review letters identify R-22345 and R-22348, dated July 15, 2026, expiring July 14, 2029. They support the California Factory-Built Housing structure story. They do not replace city/county permit review, site plans, foundation design, utility approvals, inspections, or licensed installation.
City permit approval lane
Learn why a city or county still reviews the lot, placement, foundation, utilities, setbacks, fire access, fees, and inspections before a real installation.
Read city approval pageCertificates and standards lane
See which approvals, insignia paths, finish-material certificates, energy-code documents, and component standards matter before a buyer trusts the product packet.
Read certificate hubApproval and license checklist
See the practical sequence: product documents, site feasibility, local permit intake, contractor-license scope, inspections, and closeout evidence.
Read checklist articleR-22345 source packet
3L three-bedroom ADU with kitchen on right side. Gross area shown in the package: 962.40 sf. Net indoor area shown: 931.63 sf.
Open PDFR-22348 source packet
1L one-bedroom ADU with kitchen on left side. The PDF includes plumbing, electrical, equipment, and architectural package material.
Open PDFTruth boundary
The site uses source-backed approval facts only. It does not claim site-ready permit status, local permit issuance, a verified contractor license, or a completed installed quote.
Read boundary guideOfficial California context
California HCD describes factory-built housing as a factory-constructed version of a site-built residential building that is transported to its permanent location. HCD also requires factory-built units or components offered for sale in California to carry an HCD insignia before shipment when they fall under the FBH program. Local governments remain important because the project still has a real property, local standards, foundation, utilities, and inspection path.