California Building code adoption
Statewide mandatory minimum · 2 cities tracked · 2 with amendments.
Overview
Governance
Statewide
Cities tracked
2
The state sets a single mandatory edition for every jurisdiction. Cities may only adopt more restrictive amendments, never less.
Adopted building codes (state level)
Statewide mandatory minimum. Click a code to open its full adoption atlas across all 50 states.
City-level adoption
| City | IBC edition | Amendments | Note |
|---|---|---|---|
| Los Angeles | 2024 | yes | Significant local amendments to CBC, CRC, CMC, CPC |
| San Francisco | 2024 | yes | Significant local amendments; does NOT adopt the CRC |
Quirks & watch-items
Quirks & watch-items
- Never say "IBC 2024" for California — correct label is "2025 CBC based on 2024 IBC with CA amendments"
- California uses UMC/UPC (Uniform codes) for mechanical and plumbing, not IMC/IPC
- CA Energy Code (Part 6) is its own system, not based on IECC — significantly more aggressive
- CALGreen (Part 11) is mandatory, not voluntary — unique nationally
- Triennial cycle: next edition will be 2028 Title 24
- SF does not adopt the California Residential Code (CRC/Part 2.5)
- Previous edition was 2022 Title 24 (based on 2021 IBC, effective Jan 1, 2023)