73 East Lake (sl75)

How does 73 East Lake (sl75) compare with other multifamily housing buildings in Chicago?

The latest disclosures cover 1,515 multifamily housing buildings in Chicago, out of 3,852 buildings citywide. 73 East Lake (sl75)'s ENERGY STAR score of 90 compares with an average of 62 across the 1,472 that report a score; it scores higher than 81% of them and lower than 18%. Its site EUI of 48.3 kBtu/ft² is about 33% below the average of 72.0 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 5.2 kgCO₂e/ft² is about 10% below the group average of 5.8 kgCO₂e/ft².

At 298,552 sq ft, it is about 45% above the average floor area of 206,097 sq ft for those buildings. It was built in 2014, 43 years later than the group's average year built (1971). Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².

How has 73 East Lake (sl75)'s energy performance changed over time?

BuildingCensus holds 8 Chicago disclosures for 73 East Lake (sl75), covering report years 2016–2023. Its ENERGY STAR score went from 27 in 2016 to 90 in 2023 (+63 points); its best year on file was 2018, at 95. Site EUI moved from 92.5 kBtu/ft² (2016) to 48.3 kBtu/ft² (2023), a 48% decrease. Reported emissions went from 3,105 tCO₂e to 1,552 tCO₂e over the same span (down 50%).

What does an ENERGY STAR score of 90 mean?

ENERGY STAR scores run from 1 to 100 and are computed by the EPA's Portfolio Manager as a percentile against similar buildings nationwide, adjusted for climate, size and use: a score of 90 means the building performs better than about 90% of its national peers. BuildingCensus bands the score into report-card grades; 90 falls in band A — high performer (85–100). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. In Chicago, 35% of scored buildings are at 75 or above.

Site energy-use intensity (EUI) is the energy a building uses on site in a year divided by its floor area, in thousand Btu per square foot — lower is more efficient. 73 East Lake (sl75)'s 48.3 kBtu/ft² across 298,552 sq ft works out to about 14.4 billion Btu (4,226 MWh-equivalent) in 2023. Its source EUI of 103.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,653,297 kWh of electricity, 53,707 therms of natural gas and 11,618 thousand gallons of water for the year.

Which law requires 73 East Lake (sl75) to report its energy use?

73 East Lake (sl75) reports under the Building Energy Use Benchmarking Ordinance, the legal basis of the Chicago Energy Benchmarking program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2023 disclosure (source record chicago:100211:2023). Covered buildings that fail to benchmark and report face fines of up to $100 plus $25 per day of violation under the ordinance.