Berkeley's BESO requires existing commercial, industrial, and multifamily buildings to report their annual energy consumption and perform comprehensive energy assessments on a 5-year reoccurring cycle. BESO requirements are the followings:

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• Buildings between 15,000 - 24,999 ft­² require annual benchmarking and assessment at time of listing

• Buildings over 25,000 ft­² require annual benchmarking and energy assessment every 5 years

• Buildings between 850 - 14,000 ft­² and 1-4 unit homes require assessment at time of listing

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Annual Energy Benchmarking - Due July 1st Annually

Building owners for all buildings over 15,000 ft­² are required to submit their buildings' energy benchmarks through the ENERGY STAR Portfolio Manager website annually. 

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Energy Assessment - Every 5 Years​

Building owners for all buildings over 25,000 ft­² are required to perform a comprehensive energy assessment every five years. BESO provides a LARGE BUILDING LIST for checking the status of your building's assessment compliance status.

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• Buildings under 50,000 ft­² are required to perform ASHRAE Level I Energy Audit

• Buildings of 50,000 ft­² or more are required to perform ASHARE Level II Energy Audit