24 East Washington Street

How does 24 East Washington Street compare with other office buildings in Chicago?

The latest disclosures cover 387 office buildings in Chicago, out of 3,852 buildings citywide. 24 East Washington Street's ENERGY STAR score of 94 compares with an average of 69 across the 320 that report a score; it scores higher than 95% of them and lower than 4%. Its site EUI of 41.5 kBtu/ft² is about 41% below the average of 70.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 3.1 kgCO₂e/ft² is about 59% below the group average of 7.5 kgCO₂e/ft².

At 707,816 sq ft, it is about 45% above the average floor area of 488,124 sq ft for those buildings. It was built in 2020, 64 years later 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.

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. 24 East Washington Street's 41.5 kBtu/ft² across 707,816 sq ft works out to about 29.4 billion Btu (8,609 MWh-equivalent) in 2023. Its source EUI of 58.9 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,056,577 kWh of electricity, 123,309 therms of natural gas and 872 thousand gallons of water for the year.

Which law requires 24 East Washington Street to report its energy use?

24 East Washington Street 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:257173:2023). Covered buildings that fail to benchmark and report face fines of up to $100 plus $25 per day of violation under the ordinance.