California · Building code

The building code in force in California now.

2025 California Building Code (Title 24, Part 2), based on the 2024 IBC with California amendments; Part 10 Existing Building Code from the 2024 IEBC. Enforced by Local city/county building departments; specified state agencies for state-regulated occupancies. Adopting body: California Building Standards Commission. Verified on the primary source, re-checked weekly.

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Building code in California

Verified on the source

In force

2025 California Building Code (Title 24, Part 2), based on the 2024 IBC with California amendments; Part 10 Existing Building Code from the 2024 IEBC

Published Jul 1, 2025; effective Jan 1, 2026 statewide. Produced by the 2024 Triennial Cycle from 2024 ICC/IAPMO model codes and the 2023 NEC. Errata (Bulletin 26-01) enforceable from the same date.

Source: primary document

Who enforces it

Local city/county building departments; specified state agencies for state-regulated occupancies. Adopting body: California Building Standards Commission

Statewide layer. County and city amendments sit on top; the building view resolves them from your ZIP.

What changes next

Supplement effective Jul 1, 2027

2025 Intervening Code Cycle supplements effective Jul 1, 2027

Dated items

Next 24 months

Jun 1, 2027

Annual AB 802 energy benchmarking report due for commercial buildings over 50,000 sq ft (and qualifying multifamily), unless covered by an exempted local ordinanceCalifornia Energy Commission

Dated

Jul 1, 2027

2025 Intervening Code Adoption Cycle supplements to the 2025 Title 24 (including Part 2 Building and Part 9 Fire) take effectCalifornia Building Standards Commission

Dated

Questions about the building code in California

Which building code applies in California today?

2025 California Building Code (Title 24, Part 2), based on the 2024 IBC with California amendments; Part 10 Existing Building Code from the 2024 IEBC. Published Jul 1, 2025; effective Jan 1, 2026 statewide. Produced by the 2024 Triennial Cycle from 2024 ICC/IAPMO model codes and the 2023 NEC. Errata (Bulletin 26-01) enforceable from the same date.

Who enforces the building code in California?

Local city/county building departments; specified state agencies for state-regulated occupancies. Adopting body: California Building Standards Commission.

What changes next for the building code in California?

Supplement effective Jul 1, 2027. 2025 Intervening Code Cycle supplements effective Jul 1, 2027

Other areas in California

Everything in force in California

Fire code2025 California Fire Code (Title 24, Part 9), based on the 2024 IFC with California amendm…ElevatorsTitle 8 CCR Subchapter 6 Elevator Safety Orders; Group 4 incorporates ASME A17.1-2004 (con…BoilersLabor Code 7620-7771; Title 8 CCR Boiler and Fired Pressure Vessel Safety Orders (secs. 75…Pools and spasTitle 22 CCR Div. 4, Ch. 20 Public Swimming Pools (sec. 65501 et seq.); Title 24 Part 2 Ch…Hotels and lodgingNo statewide hotel operating license located; hotels are regulated locally under the State…Workplace safetyCalifornia State Plan (Cal/OSHA); Title 8 CCR safety orders; covers private-sector and sta…Retrofit and recertificationExterior elevated element (balcony/deck/walkway) inspections: Health and Safety Code 17973…

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