Factory-built housing is a factory-constructed version of a site-built residential building that is manufactured and then transported to its permanent installation location.
HCD’s Factory-Built Housing (FBH) Program helps ensure the health and safety of persons using or purchasing factory-built homes or FBH building components and helps provide California residents with reduced housing costs through mass production techniques resulting from a factory production environment.
HCD regulates the manufacturing of factory-built housing and building components manufactured for sale in California, which are defined as follows in state law:
- Factory-Built Housing - A residential building, dwelling unit, individual dwelling room, or combination of rooms, or building components, assembly, or system manufactured so that all concealed parts or processes of manufacturing cannot be inspected before installation.
- Building Component - A subsystem, subassembly or other system designed for use in or as part of a structure which may include structural, electrical, mechanical, plumbing, and fire protection systems or any other system affecting health and safety.
The Factory-Built Housing Handbook for Local Enforcement Agencies, Builders, and the General Public (PDF), form HCD FBH 314 provides information to assist local building agencies and the public in their understanding of the manufacture, assembly, installation, post-installation alteration and code enforcement of factory-built homes, their systems and their components.
Forms and Resources
- Design Approval Agency and/or Quality Assurance Agency Certification Application (PDF) — HCD FBH 307
- Notice of Third-Party Contract or Contract Termination (PDF) — HCD MH/FBH 443
- Factory-Built Housing Handbook for Local Enforcement Agencies, Builders, and the General Public (PDF) — HCD FBH 314
- Factory-Built Housing Pamphlet (Frequently Asked Questions) (PDF) — HCD FBH 315
- Submit a Complaint
- Third-party agencies (PDF)