By June 1, owners or managers of essentially all buildings in Chicago larger than 50,000 square feet were required to submit their 2015 energy usage data to the City. This is the third year that some have had to report their data; for others, it is their first year of compliance. Back in September 2013, Chicago joined a handful of other U.S. cities when it became the latest to adopt a building energy benchmarking ordinance. Through the impact of the ordinance, the City of Chicago hopes "to raise awareness of energy performance through information and transparency, with the goal of unlocking energy and cost savings opportunities."
In December 2015, the City of Chicago made public the 2014 energy usage data and ENERGY STAR scores (for those buildings that can receive scores) for commercial and institutional buildings larger than 250,000 square feet. The spreadsheet, presenting data for 243 buildings (predominantly offices, hospitals, K-12 schools, and colleges/universities), can be downloaded from the City's Data Portal.