The 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.
	2001 Standards - These standards were in effect prior to the 2005 Standards. Projects that applied for building permits prior to October 1, 2005 fall under the 2001 Standards.
	2008 Standards - The 2008 update process has begun. This page has the latest information.

California's building efficiency standards (along with those for energy efficient appliances) have saved more than $56 billion in electricity and natural gas costs since 1978. It is estimated the standards will save an additional $23 billion by 2013.

The current 2005 standards and the 2001 Standards may be downloaded from the Web pages listed above, or to obtain a hard copy, contact the Energy Commission's publications unit at 916-654-5200.

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