Resources for Building & Construction

The California Building Standards Code is a compilation of three types of building standards from three different origins:

• Building standards that have been adopted by state agencies without change from building standards contained in national model codes;
• Building standards that have been adopted and adapted from national model codes to address California’s ever-changing conditions; and
• Building standards, authorized by the California legislature, that constitute amendments not covered by national model codes, that have been created and adopted to address particular California concerns.

All occupancies in California are subject to national model codes adopted into Title 24, and occupancies are further subject to amendments adopted by state agencies and ordinances implemented by local jurisdictions’ governing bodies. 

Interested to learn more about Title 24? Watch this educational youtube video: https://youtu.be/5prckhLplRY

The 2019 California Building Standards Code (Cal. Code Regs., Title 24) was published July 1, 2019, with an effective date of January 1, 2020. The active links below will take you to each publisher’s website. 

PART 1–CALIFORNIA ADMINISTRATIVE CODE

• Errata—Part 1 (non-substantive corrections) Effective January 1, 2020

• Supplement—Part 1 Effective July 1, 2021

PART 2–CALIFORNIA BUILDING CODE

• Current Printing—Part 2 Volume 1 & 2—Including Updates (HTML)

• First Printing—Part 2, Volume 1 (PDF) 

• Errata—Part 2, Volume 1 (non-substantive corrections) Effective January 1, 2020

• Errata—Part 2, Volume 1 (non-substantive corrections) Effective October 1, 2020

• Supplement—Part 2 Volume 1 Effective July 1, 2021
• First Printing—Part 2, Volume 2 (PDF)

• Errata—Part 2, Volume 2 (non-substantive corrections) Effective January 1, 2020

• Errata—Part 2, Volume 2 (non-substantive corrections) Effective October 1, 2020

• Supplement—Part 2 Volume 2 Effective July 1, 2021

Part 2.5–CALIFORNIA RESIDENTIAL CODE

• Current Printing—Part 2.5—Including Updates (HTML)

• First Printing—Part 2.5 (PDF)

• Errata—Part 2.5 (non-substantive corrections) Effective January 1, 2020  

• Supplement—Part 2.5 Effective July 1, 2021

PART 3–CALIFORNIA ELECTRICAL CODE

• Current Printing—Part 3—Including Updates
• First Printing—Part 3

• Errata—Part 3 (non-substantive corrections) Effective January 1, 2020 

• Supplement—Part 3 Effective July 1, 2021

PART 4–CALIFORNIA MECHANICAL CODE

• Errata—Part 4 (non-substantive corrections) Effective January 1, 2020  

• Supplement—Part 4 Effective July 1, 2021

PART 5–CALIFORNIA PLUMBING CODE  

• CWoRE—Part 5 Supplement effective August 17, 2019

• Errata—Part 5 (non-substantive corrections) Effective January 1, 2020

• Errata—Part 5 (non-substantive corrections) Effective September 1, 2020

• Supplement—Part 5 Effective July 1, 2021

PART 6–CALIFORNIA ENERGY CODE

• Errata—Part 6 (Non-substantive corrections) Effective January 1, 2020

 PART 7–Vacant - formerly California Elevator Safety Construction Code (see Cal. Code Regs., Title 8)

 PART 8*–CALIFORNIA HISTORICAL BUILDING CODE

 PART 9–CALIFORNIA FIRE CODE

• Current Printing—Part 9—Including Updates (HTML)

• First Printing—Part 9 (PDF)

• Errata—Part 9 (Non-substantive corrections) Effective January 1, 2020

• Errata—Part 9 (Non-substantive corrections) Effective October 1, 2020

• Supplement—Part 9 Effective July 1, 2021

 PART 10*–CALIFORNIA EXISTING BUILDING CODE

• Current Printing—Part 10—Including Updates (HTML)

• First Printing—Part 10 (PDF)

• Errata—Part 10 (non-substantive corrections) Effective January 1, 2020  

• Supplement—Part 10 Effective July 1, 2021

 PART 11–CALIFORNIA GREEN BUILDING STANDARDS CODE also referred as CALGreen

• Errata—Part 11(non-substantive corrections) Effective January 1, 2020  

• CWoRE—Part 11 Supplement Effective August 17, 2019

• Supplement—Part 11 Effective July 1, 2021

PART 12*–CALIFORNIA REFERENCED STANDARDS CODE

Visit the website of the California Department of General Services, Building Standards Commission for more information about the California Building Standard Code.