(IL659) - Willow SOuare (Bldg. 4) (2012 W. St. Paul,)
Multifamily Housing in Chicago, IL · 2012 W. St. Paul, · 60647
At a glance
(IL659) - Willow SOuare (Bldg. 4) (2012 W. St. Paul,) is a 62,210-square-foot multifamily housing building in Chicago, Illinois, built in 1940. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 93 out of 100 (grade A), a site energy-use intensity of 52.8 kBtu/ft² and 275 tCO₂e of greenhouse-gas emissions. That score is higher than 85% of the 1,472 scored multifamily housing buildings in Chicago.
Building Energy Use Benchmarking Ordinance · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 93 (band A) |
| Site EUI | 52.8 kBtu/ft² |
| Source EUI | 88.1 kBtu/ft² |
| GHG emissions | 275 tCO₂e |
| GHG intensity | 4.4 kgCO₂e/ft² |
| Electricity | 340,899 kWh |
| Natural gas | 21,187 therms |
| Gross floor area | 62,210 sq ft |
| Source record | chicago:254514:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 93 | -3 | 52.8 kBtu/ft² | 275 tCO₂e |
| 2022 | 96 | 54.4 kBtu/ft² | 278 tCO₂e | |
| 2021 | — | — | — | |
| 2020 | 84 | -9 | 62.8 kBtu/ft² | 352 tCO₂e |
| 2019 | 93 | -1 | 51.2 kBtu/ft² | 389 tCO₂e |
| 2018 | 94 | +13 | 51.1 kBtu/ft² | 392 tCO₂e |
| 2017 | 81 | -10 | 51.6 kBtu/ft² | 369 tCO₂e |
| 2016 | 91 | 42.1 kBtu/ft² | 348 tCO₂e |
Compliance context
Building Energy Use Benchmarking Ordinance
Covered buildings that fail to benchmark and report face fines of up to $100 plus $25 per day of violation under the ordinance.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 2012 W. St. Paul,
- City
- Chicago
- State
- Illinois
- ZIP
- 60647
- Coordinates
- 41.79547, -87.59957
Within ~1 km
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See also: most efficient in Chicago · biggest emitters
How does (IL659) - Willow SOuare (Bldg. 4) (2012 W. St. Paul,) 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. (IL659) - Willow SOuare (Bldg. 4) (2012 W. St. Paul,)'s ENERGY STAR score of 93 compares with an average of 62 across the 1,472 that report a score; it scores higher than 85% of them and lower than 13%. Its site EUI of 52.8 kBtu/ft² is about 27% 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 4.4 kgCO₂e/ft² is about 24% below the group average of 5.8 kgCO₂e/ft².
At 62,210 sq ft, it is about 70% below the average floor area of 206,097 sq ft for those buildings. It was built in 1940, 31 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 (IL659) - Willow SOuare (Bldg. 4) (2012 W. St. Paul,)'s energy performance changed over time?
BuildingCensus holds 8 Chicago disclosures for (IL659) - Willow SOuare (Bldg. 4) (2012 W. St. Paul,), covering report years 2016–2023. Its ENERGY STAR score went from 91 in 2016 to 93 in 2023 (+2 points); its best year on file was 2022, at 96. Site EUI moved from 42.1 kBtu/ft² (2016) to 52.8 kBtu/ft² (2023), an 25% increase. Reported emissions went from 348 tCO₂e to 275 tCO₂e over the same span (down 21%).
What does an ENERGY STAR score of 93 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 93 means the building performs better than about 93% of its national peers. BuildingCensus bands the score into report-card grades; 93 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. (IL659) - Willow SOuare (Bldg. 4) (2012 W. St. Paul,)'s 52.8 kBtu/ft² across 62,210 sq ft works out to about 3.3 billion Btu (963 MWh-equivalent) in 2023. Its source EUI of 88.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 340,899 kWh of electricity and 21,187 therms of natural gas for the year.
Which law requires (IL659) - Willow SOuare (Bldg. 4) (2012 W. St. Paul,) to report its energy use?
(IL659) - Willow SOuare (Bldg. 4) (2012 W. St. Paul,) 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:254514:2023). Covered buildings that fail to benchmark and report face fines of up to $100 plus $25 per day of violation under the ordinance.
More multifamily housing buildings in Chicago
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- 199 East Lake Shore Drive· 62,000 sq ft · EUI 100.7 kBtu/ft²
- New Mildred LLC· 62,000 sq ft · score 85 (A)
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Frequently asked questions
What is (IL659) - Willow SOuare (Bldg. 4) (2012 W. St. Paul,)'s energy grade?
(IL659) - Willow SOuare (Bldg. 4) (2012 W. St. Paul,) scores 93 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2023 Chicago disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does (IL659) - Willow SOuare (Bldg. 4) (2012 W. St. Paul,) use?
Its 2023 site energy-use intensity was 52.8 kBtu/ft² (88.1 kBtu/ft² source) across 62,210 sq ft, including 340,899 kWh of electricity and 21,187 therms of natural gas.
What are (IL659) - Willow SOuare (Bldg. 4) (2012 W. St. Paul,)'s carbon emissions?
(IL659) - Willow SOuare (Bldg. 4) (2012 W. St. Paul,) reported 275 tCO₂e of greenhouse-gas emissions (4.4 kgCO₂e/ft²) for 2023.
Where is (IL659) - Willow SOuare (Bldg. 4) (2012 W. St. Paul,)?
(IL659) - Willow SOuare (Bldg. 4) (2012 W. St. Paul,) is in Chicago, Illinois 60647. Its coordinates are 41.79547, -87.59957 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is (IL659) - Willow SOuare (Bldg. 4) (2012 W. St. Paul,) and when was it built?
(IL659) - Willow SOuare (Bldg. 4) (2012 W. St. Paul,) has 62,210 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1940 as its year built. It is classed as multifamily housing.
Is (IL659) - Willow SOuare (Bldg. 4) (2012 W. St. Paul,) covered by the Building Energy Use Benchmarking Ordinance?
Yes — it appears in the 2023 Chicago Energy Benchmarking disclosure, which lists the buildings reporting under the Building Energy Use Benchmarking Ordinance.
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About this data
Source: Chicago Energy Benchmarking (Building Energy Use Benchmarking Ordinance), as published October 2, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “(IL659) - Willow SOuare (Bldg. 4) (2012 W. St. Paul,), Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/il659-willow-souare-bldg-4-2012-w-st-paul-227a19ba (data as of October 2, 2026).