230 East Ontario Condominium Association
Multifamily Housing in Chicago, IL · 230 E. Ontario St. · 60611
At a glance
230 East Ontario Condominium Association is a 163,000-square-foot multifamily housing building at 230 E. Ontario St. in Chicago, Illinois, built in 1969. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 49 out of 100 (grade D), a site energy-use intensity of 67.0 kBtu/ft² and 920 tCO₂e of greenhouse-gas emissions. That score is higher than 31% 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 | 49 (band D) |
| Site EUI | 67.0 kBtu/ft² |
| Source EUI | 112.4 kBtu/ft² |
| GHG emissions | 920 tCO₂e |
| GHG intensity | 5.6 kgCO₂e/ft² |
| Electricity | 1,147,544 kWh |
| Natural gas | 70,082 therms |
| Gross floor area | 163,000 sq ft |
| Source record | chicago:103315:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 49 | 67.0 kBtu/ft² | 920 tCO₂e | |
| 2022 | — | 70.8 kBtu/ft² | 669 tCO₂e | |
| 2021 | 1 | -51 | 183.0 kBtu/ft² | 826 tCO₂e |
| 2020 | 52 | +4 | 73.4 kBtu/ft² | 1,017 tCO₂e |
| 2019 | 48 | ±0 | 78.5 kBtu/ft² | — |
| 2018 | 48 | +4 | 79.4 kBtu/ft² | 1,145 tCO₂e |
| 2017 | 44 | -2 | 73.7 kBtu/ft² | 1,154 tCO₂e |
| 2016 | 46 | 75.5 kBtu/ft² | 1,178 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.
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Location
- Address
- 230 E. Ontario St.
- City
- Chicago
- State
- Illinois
- ZIP
- 60611
- Coordinates
- 41.99652, -87.65544
Within ~1 km
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See also: most efficient in Chicago · biggest emitters
How does 230 East Ontario Condominium Association 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. 230 East Ontario Condominium Association's ENERGY STAR score of 49 compares with an average of 62 across the 1,472 that report a score; it scores higher than 31% of them and lower than 68%. Its site EUI of 67.0 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 5.6 kgCO₂e/ft² is roughly in line with the group average of 5.8 kgCO₂e/ft².
At 163,000 sq ft, it is about 21% below the average floor area of 206,097 sq ft for those buildings. Its 1969 construction date is close to 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 230 East Ontario Condominium Association's energy performance changed over time?
BuildingCensus holds 8 Chicago disclosures for 230 East Ontario Condominium Association, covering report years 2016–2023. Its ENERGY STAR score went from 46 in 2016 to 49 in 2023 (+3 points); its best year on file was 2020, at 52. Site EUI moved from 75.5 kBtu/ft² (2016) to 67.0 kBtu/ft² (2023), a 11% decrease. Reported emissions went from 1,178 tCO₂e to 920 tCO₂e over the same span (down 22%).
What does an ENERGY STAR score of 49 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 49 means the building performs better than about 49% of its national peers. BuildingCensus bands the score into report-card grades; 49 falls in band D — lowest band (1–54). It sits 26 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. 230 East Ontario Condominium Association's 67.0 kBtu/ft² across 163,000 sq ft works out to about 10.9 billion Btu (3,201 MWh-equivalent) in 2023. Its source EUI of 112.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,147,544 kWh of electricity and 70,082 therms of natural gas for the year.
Which law requires 230 East Ontario Condominium Association to report its energy use?
230 East Ontario Condominium Association 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:103315:2023). 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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- (IL504) - 33E. Condo Association (33 E. Cedar St.)· 162,398 sq ft · score 91 (A)
- (IL0465) - 110 East Delaware Condominium (110 E Delaware Pl)· 162,009 sq ft · score 61 (C)
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Frequently asked questions
What is 230 East Ontario Condominium Association's energy grade?
230 East Ontario Condominium Association scores 49 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2023 Chicago disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 230 East Ontario Condominium Association use?
Its 2023 site energy-use intensity was 67.0 kBtu/ft² (112.4 kBtu/ft² source) across 163,000 sq ft, including 1,147,544 kWh of electricity and 70,082 therms of natural gas.
What are 230 East Ontario Condominium Association's carbon emissions?
230 East Ontario Condominium Association reported 920 tCO₂e of greenhouse-gas emissions (5.6 kgCO₂e/ft²) for 2023.
Where is 230 East Ontario Condominium Association?
230 East Ontario Condominium Association is at 230 E. Ontario St., in Chicago, Illinois 60611. Its coordinates are 41.99652, -87.65544 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is 230 East Ontario Condominium Association and when was it built?
230 East Ontario Condominium Association has 163,000 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1969 as its year built. It is classed as multifamily housing.
Is 230 East Ontario Condominium Association 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, “230 East Ontario Condominium Association, Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/230-east-ontario-condominium-association-a52e0544 (data as of October 2, 2026).