California's concern for adequate housing for its residents was first established by the State Tenement House Act in 1909. The Act regulated only tenements such as apartment houses and hotels within cities. In 1913, the Commission of Immigration and Housing became the enforcement agency for the Tenement House Act.

The first law to address dwellings was the State Dwelling House Act enacted by the Legislature in 1917. In 1923, the State Tenement House Act, the State Hotel and Lodging Act, and the State Dwelling House Act were combined into the State Housing Act with the enforcement responsibility given to the Commission of Immigration and Housing.

In 1927, the Division of Immigration and Housing within the Department of Labor and Industrial Relations was created and later named, in 1945, the Division of Housing, the forerunner of the Division of Building and Housing Standards.

In 1951, outdated, restrictive sections were repealed and substituted with more modern concepts and material ratings. In addition, this revision extended to local enforcement agencies within the State having broad discretionary powers in approving alternate materials or methods of construction not prescribed by the Act. This moved the Act from its previous position as a specification code to a performance code.

In 1961, the State Housing Act was repealed and the State Housing Law was enacted. Dwellings, wherever located in the state, were constructed subject to provisions of the State Housing Law. The new law established authority for the Commission of Immigration and Housing to adopt rules and regulations applicable to apartment houses, hotels, and dwellings to carry out the legislative intent.

In 1965, the Commission of Housing and Community Development was created. The Division of Housing within the Department of Industrial Relations, along with all its duties, powers, responsibilities and jurisdictions, was placed in a new Department of Housing and Community Development (HCD).

In 1970, the California Legislature made a finding that uniformity in building standards throughout the state is a matter of statewide interest and concern since it would reduce housing costs and increase the efficiency of the private housing construction industry. To assure uniform standards, the legislature enacted Health and Safety Code Section 17958 which required the local governing bodies to enact ordinances imposing the same building standards as those adopted by the Department. Other provisions in this same legislative bill allowed local governments to modify the state standards provided the local government made specific findings of need.

In 1982, the Commission was eliminated and its powers were vested in HCD. In August 1982, HCD adopted the first regulations requiring adaptability and accessibility provisions accommodating persons with disabilities in newly constructed apartment houses containing five or more dwelling units. However, due to technical issues requiring additional regulatory action, these regulations did not become effective at the state level until September 15, 1984 or by default on September 15, 1985.

In the 1980s, HCD worked with building officials, building industry associations, other state agencies and representatives of the disabled community, to develop building standards requiring accessibility features in specific residential buildings. The impetus for adopting such regulations for housing was the enactment of federal laws, known as the Fair Housing Act of 1968 and Fair Housing Amendments Act of 1988. Designers, builders, and code enforcement agencies needed assistance meeting the requirements of the federal laws and implementing guidelines issued by the U.S. Department of Housing and Urban Development. The accessibility regulations adopted by HCD are currently in place in the California Code of Regulations, Title 24, Part 2, known as California Building Code. These building standards apply to newly constructed multifamily dwelling units in buildings having three or more dwelling units and four or more condominium dwelling units.

• California Building Standards Code 
  • Part 1 California Administrative Code
  • Part 2 California Building Code
  • Part 2.5 California Residential Code
  • Part 3 California Electrical Code
  • Part 4 California Mechanical Code
  • Part 5 California Plumbing Code
  • Part 6 California Energy Code
  • Part 8 California Historical Building Code
  • Part 9 California Fire Code
  • Part 10 California Existing Building Code
  • Part 11 California Green Building Standards Code
  • Part 12 California Referenced Standards Code
• Information Bulletins
• Zero-Emission Vehicles (ZEV)
• Zero-Emission Vehicles in California: Community Readiness Guidebook
• Electric Vehicle Charging Safety Tips (PDF)
• California Solar Permitting Guidebook
• Guide to the California Green Building Standards Code Residential — available for purchase through the International Code Council.
• Mold and Lead Paint Information
• Office of the State Fire Marshal Information Bulletins

General

• Providing public assistance with the California Building Standards Code and the accessibility requirements in Chapter 11A of the California Building Code.
• Providing public assistance with the California Green Building Standards Code (CALGreen).
• Participating in the California Building Standards Commission’s Coordinating Council along with other State agencies to coordinate regulatory actions.
• Participating in other interagency task forces for Electric Vehicle Readiness, Solar Permitting, and Hydrogen Fuel Station Permitting.
• Providing educational outreach and updates to the public, local jurisdictions, and various local ICC chapters.
• Updating the State Housing Law Regulations in Title 25 of the California Code of Regulations.
• Participating as a member of the California Historical Building Safety Board (SHBSB).

2022 Intervening Code Adoption Cycle

Effective date of the 2022 California Building Standards Code Supplements: July 1, 2024

• Adoption of the 2022 California Building Code, Title 24, Part 2, Building Standards Code Supplement
• Adoption of the 2022 California Building Code, Title 24, Part 2, Chapter 11A, Building Standards Code Supplement
• Adoption of the 2022 California Plumbing Code, Title 24, Part 5, Building Standards Code Supplement
• Adoption of the 2022 California Green Building Standards Code, Title 24, Part 11, Building Standards Code Supplement

2021 Triennial Code Adoption Cycle

• Codes effective January 1, 2023.
• Adoption of the 2022 California Building Code, Title 24, Part 2, originally based on the 2021 International Building Code published by the International Code Council.
• Adoption of the 2022 California Residential Code, Title 24, Part 2.5, originally based on the 2021 International Residential Code published by the International Code Council.
• Adoption of the 2022 California Electrical Code, Title 24, Part 3, originally based on the 2020 National Electrical Code published by the National Fire Protection Association.
• Adoption of the 2022 California Mechanical Code, Title 24, Part 4, originally based on the 2021 Uniform Mechanical Code published by the International Association of Plumbing and Mechanical Officials.
• Adoption of the 2022 California Plumbing Code, Title 24, Part 5, originally based on the 2021 Uniform Plumbing Code published by the International Association of Plumbing and Mechanical Officials.
• Adoption of the 2022 California Existing Building Code, Title 24, Part 10, originally based on the 2021 International Existing Building Code published by the International Code Council.
• Adoption of the 2022 California Green Building Standards Code, Title 24, Part 11.

State and Federal Agencies

• California Building Standards Commission (CBSC)
• Office of the State Fire Marshal (OSFM)
• Division of the State Architect (DSA)
• Division of the State Architect – Access Compliance
• Department of Health Care Access and Information (HCAI)
• California Energy Commission (CEC)
• Contractors State License Board
• Office of Emergency Services
• Department of Water Resources (DWR)
• California State Agency Listing
• U.S. Government Departments and Agencies

Private Organizations

• International Code Council (ICC)
• National Fire Protection Association (NFPA)
• International Association of Plumbing and Mechanical Officials (IAPMO)
• American National Standards Institute (ANSI)
• Underwriters Laboratories Inc.
• ICC Evaluation Service
• NSF (formerly NSF International)
• National Association of Counties
• American Institute of Architects
• American Society of Home Inspectors
• National Gypsum
• USG Corporation
• California Building Industry Association
• National Association of Home Builders
• California Association of Code Enforcement Officers (CACEO)
• California Real Estate Inspection Association

Assembly Bill 529 (Chapter 743, Statutes of 2023) (AB 529) requires the California Department of Housing and Community Development (HCD) to convene a working group to identify challenges to, and opportunities that help support, the creation and promotion of adaptive reuse residential projects, including identifying potential amendments to building standards. AB 529 requires HCD convene the working group no later than December 31, 2024, and develop a report of findings to the Legislature no later than December 31, 2025.

The goal of the AB 529 working group is to garner participation from stakeholders in the identification of challenges and opportunities for adaptive reuse, within the scope of AB 529, so HCD can report findings to the Legislature.

Questions or comments regarding the AB 529 Working Group can be submitted to HCD at AB529Workgroup@hcd.ca.gov.

Request for Information (RFI)

As part of its efforts to identify ways to facilitate adaptive reuse, HCD is issuing a Request for Information (RFI) to gather input from interested parties. HCD will begin accepting RFI responses from October 21, 2024, until 5:00 p.m. December 5, 2024. All RFI responses received by HCD within the RFI date range, that pertain to the topics identified within AB 529, will be reviewed.

Submit RFI responses to HCD at AB529Workgroup@hcd.ca.gov. Stakeholders are strongly encouraged to use the RFI response template below to provide feedback.

Schedule

Meeting materials and other notices will be made available at least 10 days prior to the proposed date. Tentative dates will be scheduled to optimize opportunities for stakeholders to provide input.

• August 2024 — Introductory / kick-off meeting
  • Meeting Agenda (PDF)
  • Working Meeting (YouTube)
• October 21, 2024 — Request for Information (RFI)
  • Request for Information (PDF)
  • RFI Response Template Guideline (PDF)
• October 21 – December 5, 2024 — RFI comment period