Part 11 of Title 24 is named the California Green Building Standards Code, and is also called the CALGreen Code. The 2010 edition effective on January 1, 2011 contains mandatory requirements for new buildings including:
CALGreen is the first statewide mandatory green building code in the nation. It sets minimum standards for all new buildings as part of a broad effort to significantly reduce California’s carbon emissions. CALGreen is intended to make environmentally responsible buildings part of the everyday landscape in California cities.
Among the new requirements under CALGreen, every new building in California will have to reduce water consumption by 20 percent, divert 50 percent of construction waste from landfills and install low VOC materials. Separate indoor and outdoor water meters for nonresidential buildings and moisture-sensing irrigation systems for large landscape projects will be required. CALGreen also contains requirements related to bike parking and clean vehicle parking for new nonresidential buildings.
For more information:
2010 California Green Building Standards Code
Building Standards Commission
Housing and Development
CALGreen Code Training (pdf) - by City of San Clemente