At a glance
Triangle Plaza is a 768,978-square-foot office building at 8750-8770 West Bryn Mawr Ave in Chicago, Illinois, built in 1985. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 91 out of 100 (grade A), a site energy-use intensity of 40.7 kBtu/ft² and 4,359 tCO₂e of greenhouse-gas emissions. That score is higher than 91% of the 320 scored office buildings in Chicago.
Building Energy Use Benchmarking Ordinance · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 91 (band A) |
| Site EUI | 40.7 kBtu/ft² |
| Source EUI | 113.4 kBtu/ft² |
| GHG emissions | 4,359 tCO₂e |
| GHG intensity | 5.7 kgCO₂e/ft² |
| Electricity | 9,106,272 kWh |
| Natural gas | 2,188 therms |
| Gross floor area | 768,978 sq ft |
| Source record | chicago:101682:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 91 | +5 | 40.7 kBtu/ft² | 4,359 tCO₂e |
| 2022 | 86 | +3 | 41.7 kBtu/ft² | 4,205 tCO₂e |
| 2021 | 83 | -6 | 42.6 kBtu/ft² | 4,669 tCO₂e |
| 2020 | 89 | +6 | 43.0 kBtu/ft² | 5,147 tCO₂e |
| 2019 | 83 | -2 | 51.8 kBtu/ft² | 6,117 tCO₂e |
| 2018 | 85 | -3 | 45.4 kBtu/ft² | 5,070 tCO₂e |
| 2017 | 88 | +1 | 53.7 kBtu/ft² | 6,684 tCO₂e |
| 2016 | 87 | +2 | 55.0 kBtu/ft² | 6,817 tCO₂e |
| 2015 | 85 | +3 | 57.1 kBtu/ft² | 7,896 tCO₂e |
| 2014 | 82 | 62.0 kBtu/ft² | 8,516 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
- 8750-8770 West Bryn Mawr Ave
- City
- Chicago
- State
- Illinois
- ZIP
- 60631
- Coordinates
- 41.69698, -87.62708
Within ~1 km
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See also: most efficient in Chicago · biggest emitters
How does Triangle Plaza compare with other office buildings in Chicago?
The latest disclosures cover 387 office buildings in Chicago, out of 3,852 buildings citywide. Triangle Plaza's ENERGY STAR score of 91 compares with an average of 69 across the 320 that report a score; it scores higher than 91% of them and lower than 7%. Its site EUI of 40.7 kBtu/ft² is about 42% 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 5.7 kgCO₂e/ft² is about 24% below the group average of 7.5 kgCO₂e/ft².
At 768,978 sq ft, it is about 58% above the average floor area of 488,124 sq ft for those buildings. It was built in 1985, 29 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 Triangle Plaza's energy performance changed over time?
BuildingCensus holds 10 Chicago disclosures for Triangle Plaza, covering report years 2014–2023. Its ENERGY STAR score went from 82 in 2014 to 91 in 2023 (+9 points). Site EUI moved from 62.0 kBtu/ft² (2014) to 40.7 kBtu/ft² (2023), a 34% decrease. Reported emissions went from 8,516 tCO₂e to 4,359 tCO₂e over the same span (down 49%).
What does an ENERGY STAR score of 91 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 91 means the building performs better than about 91% of its national peers. BuildingCensus bands the score into report-card grades; 91 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. Triangle Plaza's 40.7 kBtu/ft² across 768,978 sq ft works out to about 31.3 billion Btu (9,172 MWh-equivalent) in 2023. Its source EUI of 113.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 9,106,272 kWh of electricity and 2,188 therms of natural gas for the year.
Which law requires Triangle Plaza to report its energy use?
Triangle Plaza 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:101682:2023). 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
- 120 South LaSalle Street Building· 760,892 sq ft · score 88 (A)
- 515 North State· 757,990 sq ft · score 83 (B)
- Two North Riverside Plaza· 741,315 sq ft · score 64 (C)
- One North Franklin (PNC Center)· 716,245 sq ft · score 70 (B)
- 541 N Fairbanks· 712,914 sq ft · score 81 (B)
- 150 North Michigan· 708,981 sq ft · score 75 (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 Triangle Plaza's energy grade?
Triangle Plaza scores 91 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 Triangle Plaza use?
Its 2023 site energy-use intensity was 40.7 kBtu/ft² (113.4 kBtu/ft² source) across 768,978 sq ft, including 9,106,272 kWh of electricity and 2,188 therms of natural gas.
What are Triangle Plaza's carbon emissions?
Triangle Plaza reported 4,359 tCO₂e of greenhouse-gas emissions (5.7 kgCO₂e/ft²) for 2023.
Where is Triangle Plaza?
Triangle Plaza is at 8750-8770 West Bryn Mawr Ave, in Chicago, Illinois 60631. Its coordinates are 41.69698, -87.62708 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is Triangle Plaza and when was it built?
Triangle Plaza has 768,978 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1985 as its year built. It is classed as office.
Is Triangle Plaza 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, “Triangle Plaza, Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/triangle-plaza-458b3519 (data as of October 2, 2026).