311 W. Illinois
Multifamily Housing in Chicago, IL · 311 W. Illinois Street · 60654
At a glance
311 W. Illinois is a 291,091-square-foot multifamily housing building at 311 W. Illinois Street in Chicago, Illinois, built in 2017. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 73 out of 100 (grade B), a site energy-use intensity of 48.1 kBtu/ft² and 1,382 tCO₂e of greenhouse-gas emissions. That score is higher than 57% 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 | 73 (band B) |
| Site EUI | 48.1 kBtu/ft² |
| Source EUI | 94.7 kBtu/ft² |
| GHG emissions | 1,382 tCO₂e |
| GHG intensity | 4.7 kgCO₂e/ft² |
| Electricity | 2,153,877 kWh |
| Natural gas | 66,530 therms |
| Gross floor area | 291,091 sq ft |
| Source record | chicago:255953:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 73 | -10 | 48.1 kBtu/ft² | 1,382 tCO₂e |
| 2022 | 83 | +6 | 49.3 kBtu/ft² | 1,337 tCO₂e |
| 2021 | 77 | -3 | 49.2 kBtu/ft² | 1,448 tCO₂e |
| 2020 | 80 | -3 | 47.4 kBtu/ft² | 1,493 tCO₂e |
| 2019 | 83 | -1 | 48.2 kBtu/ft² | 1,549 tCO₂e |
| 2018 | 84 | 48.3 kBtu/ft² | 1,553 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
- 311 W. Illinois Street
- City
- Chicago
- State
- Illinois
- ZIP
- 60654
- Coordinates
- 41.88939, -87.62651
Within ~1 km
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See also: most efficient in Chicago · biggest emitters
How does 311 W. Illinois 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. 311 W. Illinois's ENERGY STAR score of 73 compares with an average of 62 across the 1,472 that report a score; it scores higher than 57% of them and lower than 41%. Its site EUI of 48.1 kBtu/ft² is about 33% 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 4.7 kgCO₂e/ft² is about 19% below the group average of 5.8 kgCO₂e/ft².
At 291,091 sq ft, it is about 41% above the average floor area of 206,097 sq ft for those buildings. It was built in 2017, 46 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.
How has 311 W. Illinois's energy performance changed over time?
BuildingCensus holds 6 Chicago disclosures for 311 W. Illinois, covering report years 2018–2023. Its ENERGY STAR score went from 84 in 2018 to 73 in 2023 (-11 points); its best year on file was 2018, at 84. Site EUI moved from 48.3 kBtu/ft² (2018) to 48.1 kBtu/ft² (2023), a 0% decrease. Reported emissions went from 1,553 tCO₂e to 1,382 tCO₂e over the same span (down 11%).
What does an ENERGY STAR score of 73 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 73 means the building performs better than about 73% of its national peers. BuildingCensus bands the score into report-card grades; 73 falls in band B — above median (70–84). It sits 2 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. 311 W. Illinois's 48.1 kBtu/ft² across 291,091 sq ft works out to about 14 billion Btu (4,103 MWh-equivalent) in 2023. Its source EUI of 94.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,153,877 kWh of electricity and 66,530 therms of natural gas for the year.
Which law requires 311 W. Illinois to report its energy use?
311 W. Illinois 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:255953:2023). 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
- Prairie District Homes Tower Residences Condominium Association· 291,068 sq ft · score 29 (D)
- Fourth Prairie Shores, LLC· 289,267 sq ft · score 26 (D)
- Second Prairie Shores, LLC· 289,267 sq ft · score 20 (D)
- First Praire Shores, LLC· 289,267 sq ft · score 13 (D)
- Fifth Praire Shores, LLC· 289,267 sq ft · score 16 (D)
- Third Prairie Shores, LLC· 289,267 sq ft · score 31 (D)
- Multifamily Housing buildings in Chicago· 1,515 benchmarked
- All Chicago benchmarked buildings· Building Energy Use Benchmarking Ordinance
- Most efficient large buildings in Chicago
- Least efficient large buildings in Chicago
- Biggest emitters in Chicago
Frequently asked questions
What is 311 W. Illinois's energy grade?
311 W. Illinois scores 73 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2023 Chicago disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 311 W. Illinois use?
Its 2023 site energy-use intensity was 48.1 kBtu/ft² (94.7 kBtu/ft² source) across 291,091 sq ft, including 2,153,877 kWh of electricity and 66,530 therms of natural gas.
What are 311 W. Illinois's carbon emissions?
311 W. Illinois reported 1,382 tCO₂e of greenhouse-gas emissions (4.7 kgCO₂e/ft²) for 2023.
Where is 311 W. Illinois?
311 W. Illinois is at 311 W. Illinois Street, in Chicago, Illinois 60654. Its coordinates are 41.88939, -87.62651 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is 311 W. Illinois and when was it built?
311 W. Illinois has 291,091 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 2017 as its year built. It is classed as multifamily housing.
Is 311 W. Illinois 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, “311 W. Illinois, Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/311-w-illinois-897b43ef (data as of October 2, 2026).