This page last reviewed May 2, 2013

Green Building Standards Code


The California Building Standards Commission (BSC) is responsible for adopting, approving, publishing and implementing the Building Standards Code (Title 24, California Code of Regulations).  On January 12, 2010, BSC unanimously adopted the 2010 Green Building Standards (CALGreen) code, which included mandatory measures to support the goals of the State’s greenhouse gas reduction and building energy efficiency programs and promote healthful indoor and outdoor air quality.  There are 12 parts to the Building Standards Code. The CALGreen code is Part 11 of the building code.

Changes to the 2010 CALGreen code were approved in July 2011, published on January 1, 2012 and were effective on July 1, 2012.  In addition to mandatory standards, CALGreen code includes voluntary “reach” standards, which offer model building code language for local governments to adopt more advanced measures beyond the mandatory measures.

Most recent CALGreen code changes were approved during the December 11-12, 2012, California Building Standards Commission (BSC) meeting.  The 2013 CALGreen code will be published by July 1, 2013 and will go into effect on January 1, 2014.

Lead Agency Responsibilities


Several state agencies have the authority to develop building standards and are active in the development of the CALGreen code.  The California Department of Housing and Community Development have authority to develop standards for residential construction.  BSC develops standards for state and nonresidential buildings.  The California Division of the State Architect has authority to develop standards affecting school construction and access compliance.  The California Energy Commission has authority to develop standards for energy efficiency.

Please follow the links below for additional information on each of these state agency efforts.

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For questions or comments, please contact: Dana Papke Waters at (916) 324-9615


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