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AB 1815CALIFORNIASession 20252026

California AB 1815 restricts local building standards for factory-built housing

Original title: Factory-built housing: building standards and local requirements.

August 30, 2026

Housing Building Codes Local Government Construction Factory-builthousing buildingstandardsandlocalrequirements

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Where This Stands

Currently Unknown. The next step in the legislative lifecycle is Introduced.

Version history & redline

4 versions on file

Official version history is partial: 4 linked texts are unavailable or incomplete. Source links remain available below.

Comparing 03/19/26 - Amended Assembly → 04/27/26 - Amended Assembly

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Redline computed from the official version text (record lane).View this version →

The Frame

What this does

The bill limits the ability of local governments to impose unique building requirements on factory-built residential projects, potentially streamlining construction processes across the state while overriding local municipal standards.

Who is mentioned in the record

Potentially affected actors named in the source documents. Mention is not a position.

cities and counties

Local governments are prohibited from enforcing local building standards that exceed state code for factory-built housing.

factory-built housing developers

Developers may face fewer varying local requirements when building factory-built housing projects.

What changed

Last recorded activity August 30, 2026.

What's next

Introduced.

Summary

This bill prohibits cities and counties from enforcing local building standards for that exceed or differ from the state's mandatory California Building Standards Code. It establishes new definitions for factory-built housing structures and creates a legal presumption that favors projects utilizing these construction methods.

Key Facts

You don't have to trust us. Each fact below is taken straight from the official document - click any one to see the exact passage, highlighted in the original.

Why It Matters

Frequently Asked Questions

Can my city still set its own building rules for factory-built homes?

Generally no, unless the city can prove that specific changes are necessary for health and safety due to local climate, geology, or topography.

What qualifies as a 'factory-built housing structure' under this bill?

It is a residential building where at least two-thirds of the square footage is for residential use, and at least 30% of that residential portion is constructed using .

News Coverage

No news coverage found yet. Articles are indexed twice daily.

Connected Entities

organizationGovernment Operations Agency“The agency that houses the California Building Standards Commission.”Map →

organizationCalifornia Building Standards Commission“The state body responsible for adopting and codifying building standards.”Map →

Sources

Open source document

openstates.org

Analysis Score

0–100

Significance75
How much this matters to a regular citizen
Controversy60
Intensity of disagreement among stakeholders
Entertainment10
Compellingness for a non-policy-wonk reader
Buzz20
Current news / social attention level

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