The California Green Building Standards Code—Part 11, Title 24, California Code of Regulations—known as CALGreen, is the first-in-the-nation mandatory green building standards code. In 2007, CBSC developed green building standards in an effort to meet the goals of California’s landmark initiative AB 32, which established a comprehensive program of cost-effective reductions of greenhouse gases (GHG) to 1990 levels by 2020.
CBSC has the authority to propose CALGreen standards for nonresidential structures that include new buildings or portions of new buildings, additions and alterations, and all occupancies where no other state agency has the authority to adopt green building standards applicable to those occupancies.
To read a brief history of CALGreen's origins and development, visit our History of CALGreen webpage.
California Green Building Standards Code (CALGREEN)
PART 11 – CALIFORNIA GREEN BUILDING STANDARDS CODE effective January 1, 2023
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Errata — Part 11 (non-substantive corrections) Effective January 1, 2023
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Supplement — Part 11 Effective July 1, 2024
PART 11–California Green Building Standards Code
- Current Printing—Part 11—Including Updates (HTML)
- First Printing—Part 11 (PDF)
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Errata—Part 11(non-substantive corrections)—Effective January 1, 2020
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CWoRE—Part 11 Supplement—Effective August 17, 2019
- Supplement—Part 11—Effective July 1, 2021
PART 11 -CALIFORNIA GREEN BUILDING STANDARDS CODE
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Errata—Part 11 (non-substantive corrections):effective January 1, 2017
- Supplement—Part 11effective July 1, 2018
- CWoRE Supplement—Part 11 effective August 17, 2019
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Guide to the 2022 California Green Building Standards Code—Nonresidential
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2022 CALGreen Guide Supplement—Nonresidential
- Summary of CALGreen Code Updates - Effective July 1, 2024
- See below for informational videos
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Guide to the 2022 California Green Building Standards Code—Residential
Non-residential Checklists
- 2022 Non-residential Mandatory Checklist (does not include supplements)
- 2022 Non-residential Mandatory Checklist (with supplement requirements eff. 7/1/24)
- 2022 Non-residential Tier 1 Checklist (does not include supplements)
- 2022 Non-residential Tier 1 Checklist (with supplement requirements eff. 7/1/24)
- 2022 Non-residential Tier 2 Checklist (does not include supplements)
- 2022 Non-residential Tier 2 Checklist (with supplement requirements eff. 7/1/24)
Updated checklists are also available in the CALGreen Code Supplement (Section A5.602).
Non-residential Worksheets
- 2022 Worksheet WS-1 Baseline Water Use (email request for form)
- 2022 Worksheet WS-2 Water Use Reduction (email request for form)
- 2022 Worksheet WS-3 Section 5.105.2 Building Reuse added in 2022 CALGreen Supplements
- 2022 Worksheet WS-4 Section 5.409.2 Whole Building LCA added in 2022 CALGreen Supplements
- 2022 Worksheet WS-5 Section 5.409.3 Product GWP Compliance added in 2022 CALGreen Supplements
- 2022 Worksheet WS-6 Section A5.105.2 Building Reuse (Tiers 1 & 2) added in 2022 CALGreen Supplements
- 2022 Worksheet WS-7 Section A5.409.2 Whole Building LCA (Tiers 1 & 2) added in 2022 CALGreen Supplements
- 2022 Worksheet WS-8 Section A5.409.3 Product GWP Compliance (Tiers 1 & 2) added in 2022 CALGreen Supplements
- 2022 Worksheet WS-9 Sections 5.409.2 and A5.409.2 WBLCA (mandatory and tiers) added in 2022 CALGreen Supplements (email request for form)
- 2022 Construction Waste Management Plan, Worksheet and Acknowledgement (email request for forms)
Residential Checklists
- Visit the Department of Housing and Community Development's CALGreen webpage. Residential checklists are found under "CALGreen Resources."
In partnership with the California Building Officials (CALBO), the International Code Council (ICC) offers a CALGreen Certification Exam that is intended to validate the competency of inspectors and plan reviewers on their understanding and ability to implement the provisions of CALGreen. The CALGreen Inspector/Plans Examiner certification exam covers such topics as general requirements of CALGreen, residential building systems, and non-residential building systems. The certification is offered via computer-based testing.
CALGreen Resources Repository
CALGreen Resources Repository
CALGreen Leadership Recognition in 2024
Since 2009, the California Green Building Standards Code, Part 11 of Title 24 of the California Code of Regulations (CALGreen), has been a leading example for green building codes throughout the nation and the world. The California Building Standards Commission (CBSC) is proud of its efforts and accomplishments in developing sustainable building regulations that improve the quality of life in the state now and into the future.
In May 2024, CBSC had the honor of accepting two awards recognizing CALGreen’s status as a leader in green building standards.
Green Technology's Pioneer Award recognized CBSC Associate Construction Analyst Enrique M. Rodriquez for his contributions to the development of CALGreen, specifically the alternative compliance methods for electric vehicle charging (effective on July 1, 2024).
Enrique M. Rodriguez
The U.S. Green Building Council's 2024 Policy Leadership Award recognized CBSC, the Division of the State Architect and the American Institute of Architects-California for collaborative leadership efforts in creating the mandatory embodied carbon reduction building standards in CALGreen (effective on July 1, 2024).
Ben Stapleton (USGBC), Winston Thorne (AIA-CA), Irina Brauzman (CBSC) and Sarah Vasquez (AIA-CA)