At a glance
351 W Hubbard Street is a 172,100-square-foot office building in Chicago, Illinois, built in 1950. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 47 out of 100 (grade D), a site energy-use intensity of 84.9 kBtu/ft² and 1,541 tCO₂e of greenhouse-gas emissions. That score is higher than 13% of the 320 scored office buildings in Chicago.
Building Energy Use Benchmarking Ordinance · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 47 (band D) |
| Site EUI | 84.9 kBtu/ft² |
| Source EUI | 178.7 kBtu/ft² |
| GHG emissions | 1,541 tCO₂e |
| GHG intensity | 9.0 kgCO₂e/ft² |
| Electricity | 2,581,393 kWh |
| Natural gas | 58,058 therms |
| Gross floor area | 172,100 sq ft |
| Source record | chicago:174294:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 47 | 84.9 kBtu/ft² | 1,541 tCO₂e | |
| 2022 | — | — | — | |
| 2021 | 55 | -1 | 88.4 kBtu/ft² | 1,782 tCO₂e |
| 2020 | 56 | 89.5 kBtu/ft² | 1,904 tCO₂e | |
| 2019 | — | — | — | |
| 2018 | 33 | -33 | 110.3 kBtu/ft² | 2,445 tCO₂e |
| 2017 | 66 | -2 | 91.4 kBtu/ft² | 2,370 tCO₂e |
| 2016 | 68 | +9 | 95.6 kBtu/ft² | 2,316 tCO₂e |
| 2015 | 59 | 105.6 kBtu/ft² | 2,728 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
- 351 W Hubbard Street
- City
- Chicago
- State
- Illinois
- ZIP
- 60654
- Coordinates
- 42.01052, -87.66131
Within ~1 km
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See also: most efficient in Chicago · biggest emitters
How does 351 W Hubbard Street compare with other office buildings in Chicago?
The latest disclosures cover 387 office buildings in Chicago, out of 3,852 buildings citywide. 351 W Hubbard Street's ENERGY STAR score of 47 compares with an average of 69 across the 320 that report a score; it scores higher than 13% of them and lower than 87%. Its site EUI of 84.9 kBtu/ft² is about 21% above the average of 70.4 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 9.0 kgCO₂e/ft² is about 20% above the group average of 7.5 kgCO₂e/ft².
At 172,100 sq ft, it is about 65% below the average floor area of 488,124 sq ft for those buildings. It was built in 1950, 6 years earlier 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 351 W Hubbard Street's energy performance changed over time?
BuildingCensus holds 9 Chicago disclosures for 351 W Hubbard Street, covering report years 2015–2023. Its ENERGY STAR score went from 59 in 2015 to 47 in 2023 (-12 points); its best year on file was 2016, at 68. Site EUI moved from 105.6 kBtu/ft² (2015) to 84.9 kBtu/ft² (2023), a 20% decrease. Reported emissions went from 2,728 tCO₂e to 1,541 tCO₂e over the same span (down 44%).
What does an ENERGY STAR score of 47 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 47 means the building performs better than about 47% of its national peers. BuildingCensus bands the score into report-card grades; 47 falls in band D — lowest band (1–54). It sits 28 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. 351 W Hubbard Street's 84.9 kBtu/ft² across 172,100 sq ft works out to about 14.6 billion Btu (4,282 MWh-equivalent) in 2023. Its source EUI of 178.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,581,393 kWh of electricity and 58,058 therms of natural gas for the year.
Which law requires 351 W Hubbard Street to report its energy use?
351 W Hubbard 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:174294:2023). 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
- Brooks Building LLC· 167,574 sq ft · score 43 (D)
- 8501 West Higgins Rd Chicago IL· 167,156 sq ft · score 77 (B)
- O'Hare Building 804 (Aviation Administration Building)· 166,041 sq ft · score 42 (D)
- 209 W. Jackson· 164,000 sq ft · score 72 (B)
- 401 South Clinton· 163,900 sq ft · score 48 (D)
- 180 North Wabash LLC· 162,153 sq ft · score 33 (D)
- 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 351 W Hubbard Street's energy grade?
351 W Hubbard Street scores 47 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 351 W Hubbard Street use?
Its 2023 site energy-use intensity was 84.9 kBtu/ft² (178.7 kBtu/ft² source) across 172,100 sq ft, including 2,581,393 kWh of electricity and 58,058 therms of natural gas.
What are 351 W Hubbard Street's carbon emissions?
351 W Hubbard Street reported 1,541 tCO₂e of greenhouse-gas emissions (9.0 kgCO₂e/ft²) for 2023.
Where is 351 W Hubbard Street?
351 W Hubbard Street is in Chicago, Illinois 60654. Its coordinates are 42.01052, -87.66131 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is 351 W Hubbard Street and when was it built?
351 W Hubbard Street has 172,100 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1950 as its year built. It is classed as office.
Is 351 W Hubbard 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, “351 W Hubbard Street, Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/351-w-hubbard-street-20957cd8 (data as of October 2, 2026).