At a glance
100/150 S. Wacker is a 1,281,114-square-foot office building at 150 South Wacker in Chicago, Illinois, built in 1971. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 78 out of 100 (grade B), a site energy-use intensity of 60.7 kBtu/ft² and 7,564 tCO₂e of greenhouse-gas emissions. That score is higher than 60% of the 320 scored office buildings in Chicago.
Building Energy Use Benchmarking Ordinance · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 78 (band B) |
| Site EUI | 60.7 kBtu/ft² |
| Source EUI | 117.8 kBtu/ft² |
| GHG emissions | 7,564 tCO₂e |
| GHG intensity | 5.9 kgCO₂e/ft² |
| Electricity | 11,597,789 kWh |
| Natural gas | 381,515 therms |
| Water use | 6 kgal |
| Gross floor area | 1,281,114 sq ft |
| Source record | chicago:101865:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 78 | +4 | 60.7 kBtu/ft² | 7,564 tCO₂e |
| 2022 | 74 | -4 | 68.5 kBtu/ft² | 8,073 tCO₂e |
| 2021 | 78 | +1 | 62.9 kBtu/ft² | 8,060 tCO₂e |
| 2020 | 77 | 67.8 kBtu/ft² | 9,155 tCO₂e | |
| 2019 | — | — | — | |
| 2018 | 67 | -17 | 82.3 kBtu/ft² | 12,157 tCO₂e |
| 2017 | 84 | +2 | 81.0 kBtu/ft² | 13,690 tCO₂e |
| 2016 | 82 | -4 | 85.2 kBtu/ft² | 14,408 tCO₂e |
| 2015 | 86 | +2 | 83.7 kBtu/ft² | 15,516 tCO₂e |
| 2014 | 84 | 96.0 kBtu/ft² | 17,037 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
- 150 South Wacker
- City
- Chicago
- State
- Illinois
- ZIP
- 60606
- Coordinates
- 41.90246, -87.62466
Within ~1 km
Nearby benchmarked buildings
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- 350 North Orleans (Rivion LLC)score 61
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- Michigan Plazascore 43
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- 680 North Lake Shore Drivescore 87
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- 70 W Madisonscore 73
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See also: most efficient in Chicago · biggest emitters
How does 100/150 S. Wacker compare with other office buildings in Chicago?
The latest disclosures cover 387 office buildings in Chicago, out of 3,852 buildings citywide. 100/150 S. Wacker's ENERGY STAR score of 78 compares with an average of 69 across the 320 that report a score; it scores higher than 60% of them and lower than 36%. Its site EUI of 60.7 kBtu/ft² is about 14% 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 5.9 kgCO₂e/ft² is about 21% below the group average of 7.5 kgCO₂e/ft².
At 1,281,114 sq ft, it is about 162% above the average floor area of 488,124 sq ft for those buildings. It was built in 1971, 15 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 100/150 S. Wacker's energy performance changed over time?
BuildingCensus holds 10 Chicago disclosures for 100/150 S. Wacker, covering report years 2014–2023. Its ENERGY STAR score went from 84 in 2014 to 78 in 2023 (-6 points); its best year on file was 2015, at 86. Site EUI moved from 96.0 kBtu/ft² (2014) to 60.7 kBtu/ft² (2023), a 37% decrease. Reported emissions went from 17,037 tCO₂e to 7,564 tCO₂e over the same span (down 56%).
What does an ENERGY STAR score of 78 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 78 means the building performs better than about 78% of its national peers. BuildingCensus bands the score into report-card grades; 78 falls in band B — above median (70–84). 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. 100/150 S. Wacker's 60.7 kBtu/ft² across 1,281,114 sq ft works out to about 77.8 billion Btu (22,790 MWh-equivalent) in 2023. Its source EUI of 117.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 11,597,789 kWh of electricity, 381,515 therms of natural gas and 6 thousand gallons of water for the year.
Which law requires 100/150 S. Wacker to report its energy use?
100/150 S. 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:101865:2023). 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
- 111 South Wacker· 1,248,730 sq ft · score 72 (B)
- River Point· 1,239,203 sq ft · score 86 (A)
- 222 South Riverside· 1,237,455 sq ft · score 85 (A)
- 425 South Financial· 1,237,300 sq ft · score 56 (C)
- 300 South Riverside Plaza· 1,225,724 sq ft · score 82 (B)
- 222 North LaSalle· 1,217,630 sq ft · score 83 (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 100/150 S. Wacker's energy grade?
100/150 S. Wacker scores 78 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2023 Chicago disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 100/150 S. Wacker use?
Its 2023 site energy-use intensity was 60.7 kBtu/ft² (117.8 kBtu/ft² source) across 1,281,114 sq ft, including 11,597,789 kWh of electricity and 381,515 therms of natural gas.
What are 100/150 S. Wacker's carbon emissions?
100/150 S. Wacker reported 7,564 tCO₂e of greenhouse-gas emissions (5.9 kgCO₂e/ft²) for 2023.
Where is 100/150 S. Wacker?
100/150 S. Wacker is at 150 South Wacker, in Chicago, Illinois 60606. Its coordinates are 41.90246, -87.62466 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is 100/150 S. Wacker and when was it built?
100/150 S. Wacker has 1,281,114 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1971 as its year built. It is classed as office.
Is 100/150 S. 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, “100/150 S. Wacker, Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/100-150-s-wacker-5d79b6b6 (data as of October 2, 2026).