Oakley SOuare (St. Stephen's Terrace)

How does Oakley SOuare (St. Stephen's Terrace) 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. Oakley SOuare (St. Stephen's Terrace)'s ENERGY STAR score of 91 compares with an average of 62 across the 1,472 that report a score; it scores higher than 82% of them and lower than 16%. Its site EUI of 57.7 kBtu/ft² is about 20% 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 4.7 kgCO₂e/ft² is about 19% below the group average of 5.8 kgCO₂e/ft².

At 277,185 sq ft, it is about 34% above the average floor area of 206,097 sq ft for those buildings. It was built in 1979, 8 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 Oakley SOuare (St. Stephen's Terrace)'s energy performance changed over time?

BuildingCensus holds 8 Chicago disclosures for Oakley SOuare (St. Stephen's Terrace), covering report years 2016–2023. Its ENERGY STAR score went from 14 in 2016 to 91 in 2023 (+77 points); its best year on file was 2022, at 99. Site EUI moved from 114.8 kBtu/ft² (2016) to 57.7 kBtu/ft² (2023), a 50% decrease. Reported emissions went from 1,605 tCO₂e to 1,290 tCO₂e over the same span (down 20%).

What does an ENERGY STAR score of 91 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 91 means the building performs better than about 91% of its national peers. BuildingCensus bands the score into report-card grades; 91 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. Oakley SOuare (St. Stephen's Terrace)'s 57.7 kBtu/ft² across 277,185 sq ft works out to about 16 billion Btu (4,687 MWh-equivalent) in 2023. Its source EUI of 95.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,601,139 kWh of electricity, 105,325 therms of natural gas and 3,123 thousand gallons of water for the year.

Which law requires Oakley SOuare (St. Stephen's Terrace) to report its energy use?

Oakley SOuare (St. Stephen's Terrace) 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:172406:2023). Covered buildings that fail to benchmark and report face fines of up to $100 plus $25 per day of violation under the ordinance.