Special Notice / Hearing: 10-day Notice
Vote Required: Majority
To: Honorable Board of Supervisors
From: Steve Monowitz, Director of Planning and Building Department
Subject: Adoption of the 2025 California Building Standards Code and Title 10 (Building Regulations) of the San Mateo County Ordinance Code
RECOMMENDATION:
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Adopt an ordinance: (1) repealing Title 10 (Building Regulations) of the San Mateo County Ordinance Code; and (2) adopting a new Title 10 (Building Regulations), adopting by reference the 2025 edition of the California Building Standards Code (Title 24, Parts 1 through 12) and the 2024 International Property Maintenance Code, including local amendments, previously introduced on February 24, 2026 with exemption from the California Environmental Quality Act (CEQA) pursuant to CEQA Guidelines sections 15308 and 15061(b)(3); and waive reading of the ordinance in its entirety.
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BACKGROUND:
Proposal: The Planning and Building Department (Department) proposes the adoption of the 2025 California Building Standards Code pursuant to State law, and corresponding amendments to the San Mateo County Ordinance Code, Title 10 (Building Regulations), in addition to local amendments to the California Building Standards Code to address specific concerns within unincorporated San Mateo County.
State Code Requirements: The California Building Standards Commission has adopted the 2025 California Building Standards Code based on the International Building Code (IBC), International Residential Code (IRC), International Fire Code (IFC), International Existing Building Code (IEBC), Uniform Mechanical Code (UMC), Uniform Plumbing Code (UPC), and National Electrical Code (NEC). The State adopts and publishes construction codes on three-year cycles. The International Code Council (ICC) and the International Association of Plumbing and Mechanical Officials (IAPMO) similarly develop construction and public safety codes on a triennial basis.
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