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 Bill Text - AB-1815 Factory-built housing: building standards and local requirements.

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 |Add To My Favorites |Track Bill | Version: 07/02/26 - Amended Senate
 06/22/26 - Amended Senate
 04/27/26 - Amended Assembly
 03/19/26 - Amended Assembly
 02/10/26 - Introduced

 AB-1815 Factory-built housing: building standards and local requirements.(2025-2026)

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 Date Published: 07/02/2026 09:00 PM

AB1815:v95#DOCUMENTBill Start

 Amended
 IN 
 Senate
 July 02, 2026

 Amended
 IN 
 Senate
 June 22, 2026

 Amended
 IN 
 Assembly
 April 27, 2026

 Amended
 IN 
 Assembly
 March 19, 2026

 CALIFORNIA LEGISLATURE—
 2025–2026 REGULAR SESSION

 Assembly Bill

No. 1815

Introduced by Assembly Members Wicks and Quirk-Silva
(Coauthors: Assembly Members Caloza, Mark González, Harabedian, and Hoover)

February 10, 2026

An act to amend Sections 19969.3, 19971, 19972, 19975.1, 19976.05, and 19993 of, and to add Sections 19970.1 and 19971.1 to, the Health and Safety Code, relating to housing.

LEGISLATIVE COUNSEL'S DIGEST

AB 1815, as amended, Wicks.
 Factory-built housing: building standards and local requirements.

Existing law, the California Building Standards Law, establishes the California Building Standards Commission within the Government Operations Agency. Existing law requires the commission to approve and adopt building standards and to codify those standards in the California Building Standards Code.

Existing law, the California Factory-Built Housing Law, generally regulates the design, manufacture, and installation of factory-built housing, as defined and specified. That law specifically and entirely reserves to local jurisdictions certain local requirements, including local use zone requirements, snow load requirements, and wind pressure requirements. That law provides that any person who violates any of these provisions and other specified law is guilty of a misdemeanor, as specified.

This bill
 would instead reserve to local jurisdictions local use zone requirements, local design standard requirements, local flood resistant control standards, and local wildfire safety building requirements, as provided. The bill would provide that the Legislature finds and declares that the California Building Standards Code addresses regional variations in snow load and wind pressure, as specified. The

This bill also would prohibit a city, county, or city and county from imposing or enforcing building standards that exceed the state minimum building standards in the California Building Standards Code on
 a factory-built housing construction project. The The bill would clarify that this provision does not apply to structures of a development project that are not factory-built housing.

This bill would revise and recast definitions of key terms for purposes of the California Factory-Built Housing Law. In this regard, the bill would generally define “factory-built housing” to mean a residential building with a ratio of the cost of factory-built components to the total direct hard costs for the scope of construction work within the footprint of a structure that is at least 15%, as specified, where at
 least 2/3 of the new or converted square footage is designated for residential use. By adding to the duties of local officials, and expanding the scope of a crime, this bill would impose a state-mandated local program.

The bill would include findings that changes proposed by this bill address a matter of statewide concern rather than a municipal affair and, therefore, apply to all cities, including charter cities.

The California Constitution requires the state to reimburse local agencies and school districts for certain costs mandated by the state. Statutory provisions establish procedures for making that reimbursement.

This bill would provide that no reimbursement is required by this act for specified reasons.

Digest Key

 Vote:
 MAJORITY 
 Appropriation:
 NO 
 Fiscal Committee:
 YES 
 Local Program:
 YES 

Bill Text

The people of the State of California do enact as follows:

SECTION 1.

 Section 19969.3 of the Health and Safety Code is amended to read:

19969.3.

 “Design approval agency” means a private organization meeting the requirements specified in regulations of the department to perform evaluation of factory-built components.

SEC. 2.

 Section 19970.1 is added to the Health and Safety Code, to read:

19970.1.

 (a) “Factory-built component” means