O'Hare Building 804 (Aviation Administration Building)

How does O'Hare Building 804 (Aviation Administration Building) compare with other office buildings in Chicago?

The latest disclosures cover 387 office buildings in Chicago, out of 3,852 buildings citywide. O'Hare Building 804 (Aviation Administration Building)'s ENERGY STAR score of 42 compares with an average of 69 across the 320 that report a score; it scores higher than 10% of them and lower than 89%. Its site EUI of 91.0 kBtu/ft² is about 29% above the average of 70.4 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 10.1 kgCO₂e/ft² is about 35% above the group average of 7.5 kgCO₂e/ft².

At 166,041 sq ft, it is about 66% below the average floor area of 488,124 sq ft for those buildings. It was built in 1943, 13 years earlier than the group's average year built (1957). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².

How has O'Hare Building 804 (Aviation Administration Building)'s energy performance changed over time?

BuildingCensus holds 9 Chicago disclosures for O'Hare Building 804 (Aviation Administration Building), covering report years 2015–2023. Its ENERGY STAR score went from 56 in 2015 to 42 in 2023 (-14 points); its best year on file was 2016, at 67. Site EUI moved from 96.7 kBtu/ft² (2015) to 91.0 kBtu/ft² (2023), a 6% decrease. Reported emissions went from 2,370 tCO₂e to 1,674 tCO₂e over the same span (down 29%).

What does an ENERGY STAR score of 42 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 42 means the building performs better than about 42% of its national peers. BuildingCensus bands the score into report-card grades; 42 falls in band D — lowest band (1–54). It sits 33 points below 75, the threshold for ENERGY STAR certification. 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. O'Hare Building 804 (Aviation Administration Building)'s 91.0 kBtu/ft² across 166,041 sq ft works out to about 15.1 billion Btu (4,428 MWh-equivalent) in 2023. Its source EUI of 201.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,942,473 kWh of electricity and 50,755 therms of natural gas for the year.

Which law requires O'Hare Building 804 (Aviation Administration Building) to report its energy use?

O'Hare Building 804 (Aviation Administration Building) 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:250176:2023). Covered buildings that fail to benchmark and report face fines of up to $100 plus $25 per day of violation under the ordinance.