California Code of Regulations Title 24 - BUILDING STANDARDS CODE
California Code of Regulations – Title 24: Building Standards Code
Title 24 of the California Code of Regulations (CCR) is known as the California Building Standards Code. It governs the design, construction, alteration, and maintenance of buildings and structures in California to ensure public safety, health, accessibility, and energy efficiency.
📘 Key Overview:
Enforced by: California Building Standards Commission (CBSC)
Updated triennially, with interim updates as needed
Applies to residential, commercial, public, and private buildings
🔹 Structure of Title 24
Title 24 is divided into 12 Parts, each covering specific areas of building standards:
| Part | Name | Focus |
|---|---|---|
| 1 | Administrative Code | Procedures for code adoption and publication |
| 2 | California Building Code (CBC) | General building standards (based on IBC) |
| 2.5 | California Residential Code (CRC) | Standards for one- and two-family dwellings |
| 3 | California Electrical Code (CEC) | Electrical installations (based on NEC) |
| 4 | California Mechanical Code (CMC) | HVAC systems (based on UMC) |
| 5 | California Plumbing Code (CPC) | Plumbing systems (based on UPC) |
| 6 | California Energy Code | Energy efficiency standards |
| 7 | California Elevator Safety Construction Code | Elevator installation and maintenance |
| 8 | California Historical Building Code | Standards for historical structures |
| 9 | California Fire Code (CFC) | Fire prevention and protection |
| 10 | California Existing Building Code | Repairs, alterations, and additions to existing buildings |
| 11 | California Green Building Standards Code (CALGreen) | Sustainable construction practices |
| 12 | Referenced Standards Code | Lists codes and standards referenced in other parts |
🔍 Key Features of Title 24
Energy Code (Part 6): Mandates high-performance building envelopes, lighting, HVAC, and solar-ready roofs.
CALGreen (Part 11): First mandatory green building code in the U.S.
Accessibility Provisions: Integrated into Parts 2 and 2.5, complying with ADA and state-specific laws.
Wildfire Protection: Contains enhanced standards for buildings in fire hazard severity zones.
📅 Latest Edition
The 2022 edition is currently in effect (since January 1, 2023), and the 2025 edition is under development.
Local jurisdictions may adopt more restrictive amendments.
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