At a glance
Willis Tower (Rivion LLC) is a 4,534,594-square-foot office building at 233 S Wacker Drive in Chicago, Illinois, built in 1973. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 32 out of 100 (grade D), a site energy-use intensity of 103.7 kBtu/ft² and 63,190 tCO₂e of greenhouse-gas emissions. That score is higher than 5% of the 320 scored office buildings in Chicago.
Building Energy Use Benchmarking Ordinance · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 32 (band D) |
| Site EUI | 103.7 kBtu/ft² |
| Source EUI | 278.8 kBtu/ft² |
| GHG emissions | 63,190 tCO₂e |
| GHG intensity | 13.9 kgCO₂e/ft² |
| Electricity | 129,000,005 kWh |
| Natural gas | 301,709 therms |
| Water use | 63,978 kgal |
| Gross floor area | 4,534,594 sq ft |
| Source record | chicago:103606:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 32 | -27 | 103.7 kBtu/ft² | 63,190 tCO₂e |
| 2022 | 59 | +8 | 75.1 kBtu/ft² | 41,767 tCO₂e |
| 2021 | 51 | -16 | 77.9 kBtu/ft² | 47,947 tCO₂e |
| 2020 | 67 | +9 | 60.7 kBtu/ft² | 43,675 tCO₂e |
| 2019 | 58 | -4 | 91.0 kBtu/ft² | 61,258 tCO₂e |
| 2018 | 62 | -5 | 75.8 kBtu/ft² | 54,165 tCO₂e |
| 2017 | 67 | +1 | 84.9 kBtu/ft² | 70,313 tCO₂e |
| 2016 | 66 | +11 | 90.3 kBtu/ft² | 75,072 tCO₂e |
| 2015 | 55 | +19 | 86.6 kBtu/ft² | 78,160 tCO₂e |
| 2014 | 36 | 110.0 kBtu/ft² | 99,526 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
- 233 S Wacker Drive
- City
- Chicago
- State
- Illinois
- ZIP
- 60606
- Coordinates
- 41.89835, -87.64286
Within ~1 km
Nearby benchmarked buildings
- The John Hancock Centerscore 24
Mixed Use Property · 2,290,873 sq ft
- Harbor Pointscore 51
Multifamily Housing · 1,192,576 sq ft
- 33 West Ontario Streetscore 86
Multifamily Housing · 1,043,204 sq ft
Multifamily Housing · 989,315 sq ft
- 100 North Riverside Plazascore —
Office · 874,519 sq ft
- 200 South Wacker Property LLCscore 67
Office · 843,070 sq ft
See also: most efficient in Chicago · biggest emitters
How does Willis Tower (Rivion LLC) compare with other office buildings in Chicago?
The latest disclosures cover 387 office buildings in Chicago, out of 3,852 buildings citywide. Willis Tower (Rivion LLC)'s ENERGY STAR score of 32 compares with an average of 69 across the 320 that report a score; it scores higher than 5% of them and lower than 94%. Its site EUI of 103.7 kBtu/ft² is about 47% 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 13.9 kgCO₂e/ft² is about 85% above the group average of 7.5 kgCO₂e/ft².
At 4,534,594 sq ft, it is about 829% above the average floor area of 488,124 sq ft for those buildings. It was built in 1973, 17 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 Willis Tower (Rivion LLC)'s energy performance changed over time?
BuildingCensus holds 10 Chicago disclosures for Willis Tower (Rivion LLC), covering report years 2014–2023. Its ENERGY STAR score went from 36 in 2014 to 32 in 2023 (-4 points); its best year on file was 2017, at 67. Site EUI moved from 110.0 kBtu/ft² (2014) to 103.7 kBtu/ft² (2023), a 6% decrease. Reported emissions went from 99,526 tCO₂e to 63,190 tCO₂e over the same span (down 37%).
What does an ENERGY STAR score of 32 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 32 means the building performs better than about 32% of its national peers. BuildingCensus bands the score into report-card grades; 32 falls in band D — lowest band (1–54). It sits 43 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. Willis Tower (Rivion LLC)'s 103.7 kBtu/ft² across 4,534,594 sq ft works out to about 470.2 billion Btu (137,813 MWh-equivalent) in 2023. Its source EUI of 278.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 129,000,005 kWh of electricity, 301,709 therms of natural gas and 63,978 thousand gallons of water for the year.
Which law requires Willis Tower (Rivion LLC) to report its energy use?
Willis Tower (Rivion 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 2023 disclosure (source record chicago:103606:2023). 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
- theMART, Chicago· 4,131,093 sq ft · EUI 48.5 kBtu/ft²
- Aon Center· 3,193,966 sq ft · score 79 (B)
- 10/30 South Wacker· 3,014,304 sq ft · score 72 (B)
- The Franklin (227 West Monroe; 222 West Adams)· 2,967,721 sq ft · score 88 (A)
- OneTwoPru· 2,751,035 sq ft · score 80 (B)
- Old Post Office· 2,493,160 sq ft · score 88 (A)
- 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 Willis Tower (Rivion LLC)'s energy grade?
Willis Tower (Rivion LLC) scores 32 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 Willis Tower (Rivion LLC) use?
Its 2023 site energy-use intensity was 103.7 kBtu/ft² (278.8 kBtu/ft² source) across 4,534,594 sq ft, including 129,000,005 kWh of electricity and 301,709 therms of natural gas.
What are Willis Tower (Rivion LLC)'s carbon emissions?
Willis Tower (Rivion LLC) reported 63,190 tCO₂e of greenhouse-gas emissions (13.9 kgCO₂e/ft²) for 2023.
Where is Willis Tower (Rivion LLC)?
Willis Tower (Rivion LLC) is at 233 S Wacker Drive, in Chicago, Illinois 60606. Its coordinates are 41.89835, -87.64286 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is Willis Tower (Rivion LLC) and when was it built?
Willis Tower (Rivion LLC) has 4,534,594 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1973 as its year built. It is classed as office.
Is Willis Tower (Rivion LLC) 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, “Willis Tower (Rivion LLC), Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/willis-tower-rivion-llc-5b1d1ac2 (data as of October 2, 2026).