California's Title 24, 2005 Building Energy Efficiency Standards

California's Energy Efficiency Standards for Residential and Nonresidential Buildings were established in 1978 in response to a legislative mandate to reduce California's energy consumption. The standards are updated periodically to allow consideration and possible incorporation of new energy efficiency technologies and methods.

2005 Standards - Went into effect October 1, 2005, and supersede the 2001 Standards. Projects that apply for a building permit on or after this date must comply with the 2005 Standards.

California Title 24