Every three years, the State of California adopts new building, residential, electrical, mechanical, plumbing, energy, historical, fire, existing building, and green building codes known as the California Building Standards Code.

Current Building Code

The 2025 California Building Standards Code was adopted by the Fremont City Council on November 18, 2025. The code is effective January 1, 2026.

The adopted code includes the following:

• 2025 California Building Code Volumes 1 & 2
• 2025 California Mechanical Code
• 2025 California Plumbing Code
• 2025 California Electrical Code
• 2025 California Existing Buildings Code
• 2025 California Fire Code
• 2025 California Energy Code
• 2025 California Residential Building Code
• 2025 California Green Building Standards Code
• 2025 California Historical Building Code
• 2025 International Pool and Spa Safety Code
• 2025 International Property Management Code