At a glance
One East Wacker is a 804,247-square-foot office building at One East Wacker Drive in Chicago, Illinois, built in 1962. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 92 out of 100 (grade A), a site energy-use intensity of 46.9 kBtu/ft² and 3,024 tCO₂e of greenhouse-gas emissions. That score is higher than 93% of the 320 scored office buildings in Chicago.
Building Energy Use Benchmarking Ordinance · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 92 (band A) |
| Site EUI | 46.9 kBtu/ft² |
| Source EUI | 74.8 kBtu/ft² |
| GHG emissions | 3,024 tCO₂e |
| GHG intensity | 3.8 kgCO₂e/ft² |
| Electricity | 3,440,635 kWh |
| Natural gas | 259,994 therms |
| Gross floor area | 804,247 sq ft |
| Source record | chicago:101850:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 92 | +1 | 46.9 kBtu/ft² | 3,024 tCO₂e |
| 2022 | 91 | +3 | 58.8 kBtu/ft² | 2,791 tCO₂e |
| 2021 | 88 | +1 | 58.9 kBtu/ft² | 3,188 tCO₂e |
| 2020 | 87 | +1 | 60.5 kBtu/ft² | 3,523 tCO₂e |
| 2019 | 86 | +7 | 70.5 kBtu/ft² | 4,386 tCO₂e |
| 2018 | 79 | -16 | 75.4 kBtu/ft² | 4,786 tCO₂e |
| 2017 | 95 | ±0 | 66.9 kBtu/ft² | 4,893 tCO₂e |
| 2016 | 95 | ±0 | 68.7 kBtu/ft² | 5,072 tCO₂e |
| 2015 | 95 | +3 | 65.9 kBtu/ft² | 5,196 tCO₂e |
| 2014 | 92 | 82.0 kBtu/ft² | 5,074 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
- One East Wacker Drive
- City
- Chicago
- State
- Illinois
- ZIP
- 60601
- Coordinates
- 41.89564, -87.62339
Within ~1 km
Nearby benchmarked buildings
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- 680 North Lake Shore Drivescore 87
Multifamily Housing · 1,647,872 sq ft
- 70 W Madisonscore 73
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- Stroger Hospital Campusscore 12
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- 311 S. Wackerscore 81
Office · 1,433,821 sq ft
See also: most efficient in Chicago · biggest emitters
How does One East Wacker compare with other office buildings in Chicago?
The latest disclosures cover 387 office buildings in Chicago, out of 3,852 buildings citywide. One East Wacker's ENERGY STAR score of 92 compares with an average of 69 across the 320 that report a score; it scores higher than 93% of them and lower than 6%. Its site EUI of 46.9 kBtu/ft² is about 33% below the average of 70.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 3.8 kgCO₂e/ft² is about half of the group average of 7.5 kgCO₂e/ft².
At 804,247 sq ft, it is about 65% above the average floor area of 488,124 sq ft for those buildings. It was built in 1962, 6 years later than the group's average year built (1957). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has One East Wacker's energy performance changed over time?
BuildingCensus holds 10 Chicago disclosures for One East Wacker, covering report years 2014–2023. Its ENERGY STAR score was 92 in both 2014 and 2023. Site EUI moved from 82.0 kBtu/ft² (2014) to 46.9 kBtu/ft² (2023), a 43% decrease. Reported emissions went from 5,074 tCO₂e to 3,024 tCO₂e over the same span (down 40%).
What does an ENERGY STAR score of 92 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 92 means the building performs better than about 92% of its national peers. BuildingCensus bands the score into report-card grades; 92 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. One East Wacker's 46.9 kBtu/ft² across 804,247 sq ft works out to about 37.7 billion Btu (11,054 MWh-equivalent) in 2023. Its source EUI of 74.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 3,440,635 kWh of electricity and 259,994 therms of natural gas for the year.
Which law requires One East Wacker to report its energy use?
One East Wacker 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:101850:2023). Covered buildings that fail to benchmark and report face fines of up to $100 plus $25 per day of violation under the ordinance.
More office buildings in Chicago
- IL0303ZZ-METCALFE FED BLDG· 799,454 sq ft · score 88 (A)
- 200 West Adams St.· 789,024 sq ft · score 87 (A)
- 120 South Riverside Plaza· 787,045 sq ft · score 95 (A)
- 10 South Riverside Plaza· 786,938 sq ft · score 88 (A)
- 191 North Wacker· 778,325 sq ft · score 81 (B)
- Two North LaSalle· 776,691 sq ft · score 81 (B)
- Office buildings in Chicago· 387 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 One East Wacker's energy grade?
One East Wacker scores 92 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 One East Wacker use?
Its 2023 site energy-use intensity was 46.9 kBtu/ft² (74.8 kBtu/ft² source) across 804,247 sq ft, including 3,440,635 kWh of electricity and 259,994 therms of natural gas.
What are One East Wacker's carbon emissions?
One East Wacker reported 3,024 tCO₂e of greenhouse-gas emissions (3.8 kgCO₂e/ft²) for 2023.
Where is One East Wacker?
One East Wacker is at One East Wacker Drive, in Chicago, Illinois 60601. Its coordinates are 41.89564, -87.62339 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is One East Wacker and when was it built?
One East Wacker has 804,247 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1962 as its year built. It is classed as office.
Is One East Wacker 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, “One East Wacker, Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/one-east-wacker-993c88a5 (data as of October 2, 2026).