California building codes for roof replacement
California enforces a residential code statewide.
The latest edition of the California Building Standards Code is the 2025 triennial edition, is based on the 2024 IBC and 2024 IRC, with an effective date of January 1, 2026, and is mandated statewide. The previous edition was was the 2022 triennial edition, based on the 2021 IBC and 2021 IRC, and was effective from 1/1/2023 until 12/31/2025.
Adopted editions across California
- 58 counties on the 2024 IRC
Counties in California
County pages for California are not published yet. The adoption data above covers the whole state.
Adoption data: FEMA Building Code Adoption Tracking (BCAT).