Twelve Nine Astor Building Corporation

How does Twelve Nine Astor Building Corporation 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. Twelve Nine Astor Building Corporation's ENERGY STAR score of 82 compares with an average of 62 across the 1,472 that report a score; it scores higher than 69% of them and lower than 30%. Its site EUI of 68.2 kBtu/ft² is roughly in line with 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 4.6 kgCO₂e/ft² is about 21% below the group average of 5.8 kgCO₂e/ft².

At 97,000 sq ft, it is about half of the average floor area of 206,097 sq ft for those buildings. It was built in 1925, 46 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 Twelve Nine Astor Building Corporation's energy performance changed over time?

BuildingCensus holds 8 Chicago disclosures for Twelve Nine Astor Building Corporation, covering report years 2016–2023. Its ENERGY STAR score went from 73 in 2016 to 82 in 2023 (+9 points). Site EUI moved from 80.3 kBtu/ft² (2016) to 68.2 kBtu/ft² (2023), a 15% decrease. Reported emissions went from 583 tCO₂e to 443 tCO₂e over the same span (down 24%).

What does an ENERGY STAR score of 82 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 82 means the building performs better than about 82% of its national peers. BuildingCensus bands the score into report-card grades; 82 falls in band B — above median (70–84). 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. Twelve Nine Astor Building Corporation's 68.2 kBtu/ft² across 97,000 sq ft works out to about 6.6 billion Btu (1,939 MWh-equivalent) in 2023. Its source EUI of 90.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 309,070 kWh of electricity and 55,589 therms of natural gas for the year.

Which law requires Twelve Nine Astor Building Corporation to report its energy use?

Twelve Nine Astor Building Corporation 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:113602:2023). Covered buildings that fail to benchmark and report face fines of up to $100 plus $25 per day of violation under the ordinance.