State Residential Building Code

Statewide, California


Name State Residential Building Code
Municipality Statewide
Zoning Districts Residential
Effective Date 01/01/2020
Municipal Code 2019 California Building Standards Code (CA Code of Regs, Title 24)
Code Link
Authority CA Building Standards Commission (CBSC)


January 1, 2020 was the statewide effective date established by the California Building Standards Commission (CBSC) for the 2019 California Building Standards Code (CA Code of Regs, Title 24) which adopts the 2018 editions of IBC, IFC, IRC and IEBC with amendments, including Appendix Q – Tiny Houses.

All occupancies in California are subject to national model codes adopted into Title 24, and occupancies are further subject to amendments adopted by state agencies and ordinances implemented by local jurisdictions’ governing bodies.

Key Contacts

California Building Standards Commission
2525 Natomas Park Drive, Suite 130
Sacramento, CA 95833
(916) 263-0916

California Department of Housing and Community Development (HCD)
2020 W El Camino Avenue
Sacramento, CA 95833
(800) 952-8356



Updated: Loran – January 2021

THIA will be constantly updating the legislation data. Check back often. Suggest A Correction if you are aware of any missing or incorrect information. AND keep scrolling to learn more about getting guidance.



Building Code — Legislation that speaks to how to construct a tiny house.

Zoning Code — Legislation that speaks to how the lot will be used.


ADU — Accessory Dwelling Unit

DMV — Division of Motor Vehicles

IB — Industrialized Buildings

IRC — International Residential Code

PUD — Planned Unit Development

RV — Recreational Vehicle

SF — Single Family Dwelling

T — Transitional Housing

UDO — Unified Development Ordinance

Please Suggest a Correction if you find broken links or misinformation.

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