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AB 1815

Factory-built housing: building standards and local requirements.

2025-2026 Regular Session Introduced by Jessica Caloza and 5 co-sponsors

AB 1815 streamlines California's factory-built housing approval process to accelerate modular home production and market entry, addressing housing shortage pressures.

From committee: Amend, and do pass as amended and re-refer to Com. on APPR. (Ayes 9. Noes 0.) (June 30).
#factory-builthousing #buildingstandardsandlocalrequirements
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Bill Summary · AB 1815

Legislative bill overview

AB 1815 proposes regulatory changes to California's factory-built housing approval and manufacturing processes. The bill aims to streamline the pathway for mass-produced housing units to reach market faster while establishing new state oversight mechanisms for factory-built dwelling construction.

Why is this important

California faces a critical housing shortage with affordability crises in most metropolitan areas. Factory-built (modular) housing represents a potential cost-reduction strategy by reducing on-site labor and construction timelines, though its market penetration remains limited partly due to regulatory barriers and local zoning restrictions.

Potential points of contention

  • Local control vs. state preemption: Clarifying state authority over factory-built housing standards may conflict with municipal zoning and building code preferences
  • Quality and safety standards: Balancing faster approval timelines against rigorous inspection requirements to prevent defective construction reaching consumers
  • Market impact on traditional builders: Construction industry concerns about competition from factory-built alternatives and potential workforce displacement in traditional home building sectors

Compiled from official sources — confirm details with the bill’s official record.

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