The Chicago City Council voted 32-17 to adopt the Energy Use Benchmarking & Transparency Ordinance, which requires about 3,500 commercial, residential and municipal buildings to track their energy consumption using the U.S. Environmental Protection Agency’s online Portfolio Manager. Buildings exceeding 250,000 square feet must report their annual energy use by June 2014 and buildings between 50,000 and 250,000 square feet must report consumption by June 2015. Residential buildings in each of these groups have an extra year to comply. Exemptions are allowed for financial hardship, low occupancy and new buildings.

Data must be verified every three years by a registered architect, engineer or other trained professional designated by the city. Energy scores will be publicly disclosed starting in June 2015.