At a glance
U.S. Cellular Plaza - 8420 _ Goby LLC is a 212,651-square-foot office building at 8420 W Bryn Mawr Ave in Chicago, Illinois, built in 1982. In its 2022 Chicago benchmarking disclosure it reported an ENERGY STAR score of 100 out of 100 (grade A), a site energy-use intensity of 3.7 kBtu/ft² and 103 tCO₂e of greenhouse-gas emissions. That score is higher than 100% of the 320 scored office buildings in Chicago.
Building Energy Use Benchmarking Ordinance · reporting year 2022
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 100 (band A) |
| Site EUI | 3.7 kBtu/ft² |
| Source EUI | 10.3 kBtu/ft² |
| GHG emissions | 103 tCO₂e |
| GHG intensity | 0.5 kgCO₂e/ft² |
| Electricity | 229,970 kWh |
| Natural gas | 0 therms |
| Gross floor area | 212,651 sq ft |
| Source record | chicago:251770:2022 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2022latest | 100 | ±0 | 3.7 kBtu/ft² | 103 tCO₂e |
| 2021 | 100 | ±0 | 3.7 kBtu/ft² | 114 tCO₂e |
| 2020 | 100 | ±0 | 4.7 kBtu/ft² | 155 tCO₂e |
| 2019 | 100 | +5 | 6.3 kBtu/ft² | 221 tCO₂e |
| 2018 | 95 | +17 | 24.5 kBtu/ft² | 868 tCO₂e |
| 2017 | 78 | +8 | 52.3 kBtu/ft² | 2,011 tCO₂e |
| 2016 | 70 | ±0 | 53.9 kBtu/ft² | 2,067 tCO₂e |
| 2015 | 70 | 53.6 kBtu/ft² | 2,238 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
- 8420 W Bryn Mawr Ave
- City
- Chicago
- State
- Illinois
- ZIP
- 60631
- Coordinates
- 41.98122, -87.83765
Within ~1 km
Nearby benchmarked buildings
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- O'Hare Plaza Iscore 87
Office · 985,092 sq ft
- Coast at Lakeshore Eastscore 76
Multifamily Housing · 574,065 sq ft
- O'Hare Plaza IIscore 78
Office · 516,010 sq ft
- Lake Grove Village Apartmentsscore 85
Multifamily Housing · 464,733 sq ft
Multifamily Housing · 418,371 sq ft
See also: most efficient in Chicago · biggest emitters
How does U.S. Cellular Plaza - 8420 _ Goby LLC compare with other office buildings in Chicago?
The latest disclosures cover 387 office buildings in Chicago, out of 3,852 buildings citywide. U.S. Cellular Plaza - 8420 _ Goby LLC's ENERGY STAR score of 100 compares with an average of 69 across the 320 that report a score; it scores higher than 100% of them. Its site EUI of 3.7 kBtu/ft² is about 95% 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 0.5 kgCO₂e/ft² is about 93% below the group average of 7.5 kgCO₂e/ft².
At 212,651 sq ft, it is about 56% below the average floor area of 488,124 sq ft for those buildings. It was built in 1982, 26 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 U.S. Cellular Plaza - 8420 _ Goby LLC's energy performance changed over time?
BuildingCensus holds 8 Chicago disclosures for U.S. Cellular Plaza - 8420 _ Goby LLC, covering report years 2015–2022. Its ENERGY STAR score went from 70 in 2015 to 100 in 2022 (+30 points); its best year on file was 2019, at 100. Site EUI moved from 53.6 kBtu/ft² (2015) to 3.7 kBtu/ft² (2022), a 93% decrease. Reported emissions went from 2,238 tCO₂e to 103 tCO₂e over the same span (down 95%).
What does an ENERGY STAR score of 100 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: 100 is the top of the scale. BuildingCensus bands the score into report-card grades; 100 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. U.S. Cellular Plaza - 8420 _ Goby LLC's 3.7 kBtu/ft² across 212,651 sq ft works out to about 0.8 billion Btu (231 MWh-equivalent) in 2022. Its source EUI of 10.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 229,970 kWh of electricity and 0 therms of natural gas for the year.
Which law requires U.S. Cellular Plaza - 8420 _ Goby LLC to report its energy use?
U.S. Cellular Plaza - 8420 _ Goby LLC 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 2022 disclosure (source record chicago:251770:2022). 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
- U.S. Cellular Plaza - 8410 _ Goby LLC· 212,428 sq ft · score 4 (D)
- CHCXILCW_IB00100005568/OB8292/2011 W HASTINGS ST/CHICAGO/IL· 206,000 sq ft · score 96 (A)
- 134 N. LaSalle LLC· 204,321 sq ft · score 74 (B)
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- Office buildings in Chicago· 387 benchmarked
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Frequently asked questions
What is U.S. Cellular Plaza - 8420 _ Goby LLC's energy grade?
U.S. Cellular Plaza - 8420 _ Goby LLC scores 100 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2022 Chicago disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does U.S. Cellular Plaza - 8420 _ Goby LLC use?
Its 2022 site energy-use intensity was 3.7 kBtu/ft² (10.3 kBtu/ft² source) across 212,651 sq ft, including 229,970 kWh of electricity and 0 therms of natural gas.
What are U.S. Cellular Plaza - 8420 _ Goby LLC's carbon emissions?
U.S. Cellular Plaza - 8420 _ Goby LLC reported 103 tCO₂e of greenhouse-gas emissions (0.5 kgCO₂e/ft²) for 2022.
Where is U.S. Cellular Plaza - 8420 _ Goby LLC?
U.S. Cellular Plaza - 8420 _ Goby LLC is at 8420 W Bryn Mawr Ave, in Chicago, Illinois 60631. Its coordinates are 41.98122, -87.83765 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is U.S. Cellular Plaza - 8420 _ Goby LLC and when was it built?
U.S. Cellular Plaza - 8420 _ Goby LLC has 212,651 sq ft of gross floor area, as reported in its 2022 disclosure. The disclosure lists 1982 as its year built. It is classed as office.
Is U.S. Cellular Plaza - 8420 _ Goby LLC covered by the Building Energy Use Benchmarking Ordinance?
Yes — it appears in the 2022 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, “U.S. Cellular Plaza - 8420 _ Goby LLC, Chicago, Illinois — 2022 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/u-s-cellular-plaza-8420-goby-llc-3169a18e (data as of October 2, 2026).