California Permit & Stamping Requirements
Requirements vary by region, code cycle, seismic zone, and wind or snow load. Here is what typically drives design for California projects.
What Drives Design in California
California projects are governed primarily by seismic lateral demand.
- ✓ Seismic lateral analysis per ASCE 7
- ✓ State energy code compliance report
- ✓ Structural Engineer (SE) seal where required
Exact code edition and local amendments vary by city and county. We confirm the specific requirements for your address before drafting.
Code in effect in California
California enforces the California Building Standards Code (Title 24). The 2025 edition, based on the 2024 International Codes, took effect on January 1, 2026 and applies to permit applications submitted on or after that date. State law (AB 130) freezes updates to residential building codes until at least 2031.
What to plan for
- ✓ Seismic design governs much of California structural work, so lateral analysis is central to most projects.
- ✓ Title 24 energy compliance documentation is part of most new construction and addition permits.
- ✓ The 2025 edition introduced a standalone Wildland-Urban Interface Code (Title 24, Part 7) for fire-prone areas.
Code information last verified September 2026. Codes change, so we confirm the edition in force for your address before drafting.
Frequently asked questions about California permits
Which California code applies to my project?
Permit applications submitted on or after January 1, 2026 fall under the 2025 California Building Standards Code. Applications submitted earlier may remain under the 2022 edition, depending on the jurisdiction.
Will California residential codes change again soon?
AB 130 freezes residential building code updates until at least 2031, so the 2025 edition is expected to remain the residential baseline for several years. Non-residential codes are not covered by that freeze.
Sample Work & Other States
Foundation Plan
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Roof Framing Plan
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