43 Green Phase I (gr635)

How does 43 Green Phase I (gr635) 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. 43 Green Phase I (gr635)'s ENERGY STAR score of 87 compares with an average of 62 across the 1,472 that report a score; it scores higher than 76% of them and lower than 23%. Its site EUI of 50.0 kBtu/ft² is about 31% 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 4.5 kgCO₂e/ft² is about 22% below the group average of 5.8 kgCO₂e/ft².

At 94,405 sq ft, it is about half of the average floor area of 206,097 sq ft for those buildings. It was built in 2023, 52 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.

What does an ENERGY STAR score of 87 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 87 means the building performs better than about 87% of its national peers. BuildingCensus bands the score into report-card grades; 87 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. 43 Green Phase I (gr635)'s 50.0 kBtu/ft² across 94,405 sq ft works out to about 4.7 billion Btu (1,383 MWh-equivalent) in 2023. Its source EUI of 89.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 577,149 kWh of electricity and 27,512 therms of natural gas for the year.

Which law requires 43 Green Phase I (gr635) to report its energy use?

43 Green Phase I (gr635) 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:257043:2023). Covered buildings that fail to benchmark and report face fines of up to $100 plus $25 per day of violation under the ordinance.