Lunt Lake Cooperative Apartments

How does Lunt Lake Cooperative Apartments 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. Lunt Lake Cooperative Apartments's ENERGY STAR score of 94 compares with an average of 62 across the 1,472 that report a score; it scores higher than 87% of them and lower than 12%. Its site EUI of 60.0 kBtu/ft² is about 17% 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 4.2 kgCO₂e/ft² is about 28% below the group average of 5.8 kgCO₂e/ft².

At 110,760 sq ft, it is about half of the average floor area of 206,097 sq ft for those buildings. It was built in 1949, 22 years earlier 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 Lunt Lake Cooperative Apartments's energy performance changed over time?

BuildingCensus holds 8 Chicago disclosures for Lunt Lake Cooperative Apartments, covering report years 2016–2023. Its ENERGY STAR score went from 86 in 2016 to 94 in 2023 (+8 points); its best year on file was 2020, at 98. Site EUI moved from 78.0 kBtu/ft² (2016) to 60.0 kBtu/ft² (2023), a 23% decrease. Reported emissions went from 633 tCO₂e to 461 tCO₂e over the same span (down 27%).

What does an ENERGY STAR score of 94 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 94 means the building performs better than about 94% of its national peers. BuildingCensus bands the score into report-card grades; 94 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. Lunt Lake Cooperative Apartments's 60.0 kBtu/ft² across 110,760 sq ft works out to about 6.6 billion Btu (1,948 MWh-equivalent) in 2023. Its source EUI of 82.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 362,635 kWh of electricity and 54,137 therms of natural gas for the year.

Which law requires Lunt Lake Cooperative Apartments to report its energy use?

Lunt Lake Cooperative Apartments 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:252279:2023). Covered buildings that fail to benchmark and report face fines of up to $100 plus $25 per day of violation under the ordinance.