At a glance
155 North Wacker is a 1,406,031-square-foot office building at 155 N. Wacker in Chicago, Illinois, built in 2009. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 75 out of 100 (grade B), a site energy-use intensity of 62.8 kBtu/ft² and 10,087 tCO₂e of greenhouse-gas emissions. That score is higher than 51% of the 320 scored office buildings in Chicago.
Building Energy Use Benchmarking Ordinance · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 75 (band B) |
| Site EUI | 62.8 kBtu/ft² |
| Source EUI | 140.9 kBtu/ft² |
| GHG emissions | 10,087 tCO₂e |
| GHG intensity | 7.2 kgCO₂e/ft² |
| Electricity | 18,246,689 kWh |
| Water use | 6,148 kgal |
| Gross floor area | 1,406,031 sq ft |
| Source record | chicago:160438:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 75 | ±0 | 62.8 kBtu/ft² | 10,087 tCO₂e |
| 2022 | 75 | -5 | 66.4 kBtu/ft² | 9,939 tCO₂e |
| 2021 | 80 | +3 | 57.9 kBtu/ft² | 9,169 tCO₂e |
| 2020 | 77 | +2 | 61.7 kBtu/ft² | 10,905 tCO₂e |
| 2019 | 75 | +7 | 75.8 kBtu/ft² | — |
| 2018 | 68 | -23 | 81.8 kBtu/ft² | 14,025 tCO₂e |
| 2017 | 91 | +5 | 63.1 kBtu/ft² | 13,054 tCO₂e |
| 2016 | 86 | +2 | 79.2 kBtu/ft² | 14,647 tCO₂e |
| 2015 | 84 | +4 | 81.0 kBtu/ft² | 16,566 tCO₂e |
| 2014 | 80 | 88.0 kBtu/ft² | 18,242 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
- 155 N. Wacker
- City
- Chicago
- State
- Illinois
- ZIP
- 60606
- Coordinates
- 41.68519, -87.64228
Within ~1 km
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See also: most efficient in Chicago · biggest emitters
How does 155 North Wacker compare with other office buildings in Chicago?
The latest disclosures cover 387 office buildings in Chicago, out of 3,852 buildings citywide. 155 North Wacker's ENERGY STAR score of 75 compares with an average of 69 across the 320 that report a score; it scores higher than 51% of them and lower than 47%. Its site EUI of 62.8 kBtu/ft² is about 11% 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 7.2 kgCO₂e/ft² is roughly in line with the group average of 7.5 kgCO₂e/ft².
At 1,406,031 sq ft, it is about 188% above the average floor area of 488,124 sq ft for those buildings. It was built in 2009, 53 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 155 North Wacker's energy performance changed over time?
BuildingCensus holds 10 Chicago disclosures for 155 North Wacker, covering report years 2014–2023. Its ENERGY STAR score went from 80 in 2014 to 75 in 2023 (-5 points); its best year on file was 2017, at 91. Site EUI moved from 88.0 kBtu/ft² (2014) to 62.8 kBtu/ft² (2023), a 29% decrease. Reported emissions went from 18,242 tCO₂e to 10,087 tCO₂e over the same span (down 45%).
What does an ENERGY STAR score of 75 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 75 means the building performs better than about 75% of its national peers. BuildingCensus bands the score into report-card grades; 75 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. 155 North Wacker's 62.8 kBtu/ft² across 1,406,031 sq ft works out to about 88.3 billion Btu (25,878 MWh-equivalent) in 2023. Its source EUI of 140.9 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 18,246,689 kWh of electricity and 6,148 thousand gallons of water for the year.
Which law requires 155 North Wacker to report its energy use?
155 North 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:160438:2023). 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
- Leo Burnett Building· 1,392,096 sq ft · score 76 (B)
- One South Wacker· 1,387,952 sq ft · score 82 (B)
- 353 North Clark· 1,364,257 sq ft · score 76 (B)
- 100/150 S. Wacker· 1,281,114 sq ft · score 78 (B)
- 111 South Wacker· 1,248,730 sq ft · score 72 (B)
- River Point· 1,239,203 sq ft · score 86 (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 155 North Wacker's energy grade?
155 North Wacker scores 75 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 155 North Wacker use?
Its 2023 site energy-use intensity was 62.8 kBtu/ft² (140.9 kBtu/ft² source) across 1,406,031 sq ft, including 18,246,689 kWh of electricity.
What are 155 North Wacker's carbon emissions?
155 North Wacker reported 10,087 tCO₂e of greenhouse-gas emissions (7.2 kgCO₂e/ft²) for 2023.
Where is 155 North Wacker?
155 North Wacker is at 155 N. Wacker, in Chicago, Illinois 60606. Its coordinates are 41.68519, -87.64228 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is 155 North Wacker and when was it built?
155 North Wacker has 1,406,031 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 2009 as its year built. It is classed as office.
Is 155 North 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, “155 North Wacker, Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/155-north-wacker-7acfd604 (data as of October 2, 2026).