Adopted Building Codes - 2025 Edition

Adopted Building Codes – 2025 Edition

Effective Date: January 1, 2026

If you are an architect, engineer, designer, or contractor working in the State of California, please be advised that the 2025 edition of the California Building Standards Code (Title 24, CCR) took effect on January 1, 2026. 

Important:

All permit applications submitted on or after January 1, 2026 must comply with the 2025 code set. 

Plans submitted before that date may continue under the prior (2023) code, if applicable—but please check with the Building Division for your jurisdiction. 

Be sure your submission is aligned with the 2025 code at the time of plan submission; projects not in compliance cannot be approved.

The full 2025 code texts are available for public inspection on the state’s website via the California Building Standards Commission.

Ordinance No. 696

AN ORDINANCE OF THE CITY OF FOSTER CITY AMENDING SECTION 1.01.010, “ADOPTION-SECONDARY CODES ADOPTED,” OF CHAPTER 1.01, “CODE ADOPTION,” WITHIN TITLE 1 OF THE FOSTER CITY MUNICIPAL CODE ADOPTING BY REFERENCE CERTAIN PARTS, INCLUDING RELATED APPENDICES, AS IDENTIFIED IN THE 2025 CALIFORNIA BUILDING CODE, 2025 RESIDENTIAL CODE, 2025 CALIFORNIA MECHANICAL CODE, 2025 CALIFORNIA PLUMBING CODE, 2025 CALIFORNIA ELECTRICAL CODE, 2025 CALIFORNIA FIRE CODE, 2025 CALIFORNIA ENERGY CODE, 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE, THE 2025 CALIFORNIA EXISTING BUILDING CODE AND THE 2025 WILDLAND-URBAN INTERFACE CODE WITHIN TITLE 24 OF THE CALIFORNIA CODE OF REGULATIONS; AND FINDING THE AMENDMENTS EXEMPT FROM THE CALIFORNIA ENVIRONMENTAL QUALITY ACT (CEQA) PURSUANT TO CEQA GUIDELINES SECTION 15061(B)(3)

Ordinance No. 697

AN ORDINANCE OF THE CITY OF FOSTER CITY REPEALING AND REPLACING CHAPTERS 15.02, “BUILDING CODE”; 15.04, “RESIDENTIAL CODE”; 15.06, “EXISTING BUILDING CODE”; 15.08, “MECHANICAL CODE”; 15.16,” “PLUMBING CODE”; 15.20, “ELECTRICAL CODE”; 15.24, “FIRE CODE”, AND 15.46 “ELECTRIC VEHICLE CHARGING STATIONS” WITHIN TITLE 15, “BUILDING AND CONSTRUCTION,” OF THE FOSTER CITY MUNICIPAL CODE AND ADOPTING BY REFERENCE THE 2025 CALIFORNIA BUILDING CODE, 2025 RESIDENTIAL CODE, 2025 CALIFORNIA ELECTRICAL CODE, 2025 CALIFORNIA MECHANICAL CODE, 2025 CALIFORNIA PLUMBING CODE, 2025 CALIFORNIA FIRE CODE, AND THE 2025 CALIFORNIA EXISTING BUILDING CODE WITH APPENDICES WITHIN TITLE 24 OF THE CALIFORNIA CODE OF REGULATIONS AND MAKING CERTAIN AMENDMENTS THERETO, INCLUDING THE ADDITION OF VARIOUS PENALTIES; DELEGATING ENFORCEMENT AUTHORITY FOR THE CALIFORNIA FIRE CODE TO THE SAN MATEO CONSOLIDATED FIRE DEPARTMENT; AND FINDING THE AMENDMENTS EXEMPT FROM THE CALIFORNIA ENVIRONMENTAL QUALITY ACT (CEQA) PURSUANT TO CEQA GUIDELINES SECTION 15061(B)(3)