To: Board of Supervisors
From: John Kopchik, Director, Conservation and Development
Report Title: Introduce Ordinance No. 2025-19, adopting the 2025 California Building Standard Codes
?Recommendation of the County Administrator ? Recommendation of Board Committee
RECOMMENDATIONS:
1. INTRODUCE Ordinance No. 2025-19, adopting the 2025 California Building Code, the 2025 California Residential Code, the 2025 Electrical Code, the 2025 Mechanical Code, the 2025 Plumbing Code, the 2025 Energy Code, the 2025 Historical Building Code, the 2025 Existing Building Code, and the 2025 California Green Building Standards Code with changes, additions, and deletions, WAIVE reading, and FIX November 4, 2025 at 9:30 a.m. for a public hearing to consider adoption of the ordinance and adoption of findings of local conditions to justify construction standards stricter than those imposed by Health and Safety Code section 19180 et seq.
2. DIRECT the Clerk of the Board to publish notice of the hearing pursuant to Government Code section 6066.
3. AUTHORIZE the preparation of an ordinance summary by County Counsel and the publication of the summary in accordance with Government Code section 25124, and DIRECT the Clerk of the Board of Supervisors to post a copy of the full text of the proposed ordinance in the office of the Clerk of the Board.
FISCAL IMPACT:
None
BACKGROUND:
The California Building Standards Commission has adopted the 2025 California Building Standards Code (CBSC), replacing the 2022 CBSC. The CBSC includes the California Building, Residential, Electrical, Mechanical, Plumbing, Energy, Historical Building, and Existing Building and Green Building Standards Codes. These statewide codes will be effective January 1, 2026. The Department of Conservation and Development is responsible for enforcing the CBSC within the unincorporated area of Contra Costa County.
Although these codes apply statewide, Health and Safety Code sections 17958.5 and 18941.5 authorize a local ju...
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