33 West Ontario Street
Multifamily Housing in Chicago, IL · 33 W Ontario St. · 60654
At a glance
33 West Ontario Street is a 1,043,204-square-foot multifamily housing building at 33 W Ontario St. in Chicago, Illinois, built in 2003. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 86 out of 100 (grade A), a site energy-use intensity of 45.8 kBtu/ft² and 4,376 tCO₂e of greenhouse-gas emissions. That score is higher than 75% 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 | 86 (band A) |
| Site EUI | 45.8 kBtu/ft² |
| Source EUI | 83.6 kBtu/ft² |
| GHG emissions | 4,376 tCO₂e |
| GHG intensity | 4.2 kgCO₂e/ft² |
| Electricity | 6,204,556 kWh |
| Natural gas | 266,181 therms |
| Gross floor area | 1,043,204 sq ft |
| Source record | chicago:160293:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 86 | -5 | 45.8 kBtu/ft² | 4,376 tCO₂e |
| 2022 | 91 | +4 | 49.1 kBtu/ft² | 4,355 tCO₂e |
| 2021 | 87 | -1 | 46.9 kBtu/ft² | 4,661 tCO₂e |
| 2020 | 88 | ±0 | 47.9 kBtu/ft² | 4,849 tCO₂e |
| 2019 | 88 | +8 | 50.4 kBtu/ft² | 5,210 tCO₂e |
| 2018 | 80 | +7 | 54.4 kBtu/ft² | 5,872 tCO₂e |
| 2017 | 73 | +3 | 51.7 kBtu/ft² | 6,109 tCO₂e |
| 2016 | 70 | +9 | 54.0 kBtu/ft² | 6,521 tCO₂e |
| 2015 | 61 | 58.0 kBtu/ft² | 7,178 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.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 33 W Ontario St.
- City
- Chicago
- State
- Illinois
- ZIP
- 60654
- Coordinates
- 41.89226, -87.63575
Within ~1 km
Nearby benchmarked buildings
- Willis Tower (Rivion LLC)score 32
Office · 4,534,594 sq ft
- The John Hancock Centerscore 24
Mixed Use Property · 2,290,873 sq ft
- CH3 - Chicago 300 E Randolphscore 75
Office · 2,224,842 sq ft
- RICHARD J. DALEY CENTERscore 68
Courthouse · 1,541,766 sq ft
- 222 North LaSallescore 83
Office · 1,217,630 sq ft
- Harbor Pointscore 51
Multifamily Housing · 1,192,576 sq ft
See also: most efficient in Chicago · biggest emitters
How does 33 West Ontario Street 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. 33 West Ontario Street's ENERGY STAR score of 86 compares with an average of 62 across the 1,472 that report a score; it scores higher than 75% of them and lower than 24%. Its site EUI of 45.8 kBtu/ft² is about 36% 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 4.2 kgCO₂e/ft² is about 28% below the group average of 5.8 kgCO₂e/ft².
At 1,043,204 sq ft, it is about 406% above the average floor area of 206,097 sq ft for those buildings. It was built in 2003, 32 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 33 West Ontario Street's energy performance changed over time?
BuildingCensus holds 9 Chicago disclosures for 33 West Ontario Street, covering report years 2015–2023. Its ENERGY STAR score went from 61 in 2015 to 86 in 2023 (+25 points); its best year on file was 2022, at 91. Site EUI moved from 58.0 kBtu/ft² (2015) to 45.8 kBtu/ft² (2023), a 21% decrease. Reported emissions went from 7,178 tCO₂e to 4,376 tCO₂e over the same span (down 39%).
What does an ENERGY STAR score of 86 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 86 means the building performs better than about 86% of its national peers. BuildingCensus bands the score into report-card grades; 86 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. 33 West Ontario Street's 45.8 kBtu/ft² across 1,043,204 sq ft works out to about 47.8 billion Btu (14,003 MWh-equivalent) in 2023. Its source EUI of 83.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 6,204,556 kWh of electricity and 266,181 therms of natural gas for the year.
Which law requires 33 West Ontario Street to report its energy use?
33 West Ontario 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:160293:2023). 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
- (IL1074) ParkShore Condominium (195 N. Harbor Drive)· 1,009,778 sq ft · score 18 (D)
- OneChicago· 993,583 sq ft · score 77 (B)
- (IL0508) - Park Place Tower I Condominium (655 W Irving Park Rd )· 989,315 sq ft · score 30 (D)
- Malibu East Condominium· 987,600 sq ft · score 60 (C)
- One Museum Park East Condominium Association· 952,287 sq ft · score 78 (B)
- Wolf Point East· 938,917 sq ft · EUI 22.7 kBtu/ft²
- 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 33 West Ontario Street's energy grade?
33 West Ontario Street scores 86 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 33 West Ontario Street use?
Its 2023 site energy-use intensity was 45.8 kBtu/ft² (83.6 kBtu/ft² source) across 1,043,204 sq ft, including 6,204,556 kWh of electricity and 266,181 therms of natural gas.
What are 33 West Ontario Street's carbon emissions?
33 West Ontario Street reported 4,376 tCO₂e of greenhouse-gas emissions (4.2 kgCO₂e/ft²) for 2023.
Where is 33 West Ontario Street?
33 West Ontario Street is at 33 W Ontario St., in Chicago, Illinois 60654. Its coordinates are 41.89226, -87.63575 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is 33 West Ontario Street and when was it built?
33 West Ontario Street has 1,043,204 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 2003 as its year built. It is classed as multifamily housing.
Is 33 West Ontario Street 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, “33 West Ontario Street, Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/33-west-ontario-street-5772a02f (data as of October 2, 2026).