At a glance
20 North Clark Street - 2821 is a 445,973-square-foot office building in Chicago, Illinois, built in 1981. 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 38.5 kBtu/ft² and 2,401 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 | 38.5 kBtu/ft² |
| Source EUI | 107.7 kBtu/ft² |
| GHG emissions | 2,401 tCO₂e |
| GHG intensity | 5.4 kgCO₂e/ft² |
| Electricity | 5,028,144 kWh |
| Water use | 2,098 kgal |
| Gross floor area | 445,973 sq ft |
| Source record | chicago:103739:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 78 | +6 | 38.5 kBtu/ft² | 2,401 tCO₂e |
| 2022 | 72 | ±0 | 43.8 kBtu/ft² | 2,571 tCO₂e |
| 2021 | 72 | -14 | 40.2 kBtu/ft² | 2,563 tCO₂e |
| 2020 | 86 | +5 | 39.8 kBtu/ft² | 2,688 tCO₂e |
| 2019 | 81 | +10 | 41.2 kBtu/ft² | 2,695 tCO₂e |
| 2018 | 71 | -12 | 49.6 kBtu/ft² | 3,578 tCO₂e |
| 2017 | 83 | +2 | 48.4 kBtu/ft² | 3,880 tCO₂e |
| 2016 | 81 | -1 | 51.1 kBtu/ft² | 4,008 tCO₂e |
| 2015 | 82 | +3 | 55.1 kBtu/ft² | 4,598 tCO₂e |
| 2014 | 79 | 62.0 kBtu/ft² | 5,140 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
- 20 North Clark Street
- City
- Chicago
- State
- Illinois
- ZIP
- 60602
- Coordinates
- 41.87822, -87.63452
Within ~1 km
Nearby benchmarked buildings
- theMART, Chicagoscore —
Office · 4,131,093 sq ft
- 10/30 South Wackerscore 72
Office · 3,014,304 sq ft
- Chase Tower Chicagoscore —
Financial Office · 2,521,929 sq ft
- AMA Plazascore 58
Office · 1,870,680 sq ft
- 71215A State Stscore 45
Retail Store · 1,841,736 sq ft
- 320 South Canalscore —
Office · 1,797,756 sq ft
See also: most efficient in Chicago · biggest emitters
How does 20 North Clark Street - 2821 compare with other office buildings in Chicago?
The latest disclosures cover 387 office buildings in Chicago, out of 3,852 buildings citywide. 20 North Clark Street - 2821'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 38.5 kBtu/ft² is about half of 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 5.4 kgCO₂e/ft² is about 28% below the group average of 7.5 kgCO₂e/ft².
At 445,973 sq ft, it is roughly in line with the average floor area of 488,124 sq ft for those buildings. It was built in 1981, 25 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 20 North Clark Street - 2821's energy performance changed over time?
BuildingCensus holds 10 Chicago disclosures for 20 North Clark Street - 2821, covering report years 2014–2023. Its ENERGY STAR score went from 79 in 2014 to 78 in 2023 (-1 points); its best year on file was 2020, at 86. Site EUI moved from 62.0 kBtu/ft² (2014) to 38.5 kBtu/ft² (2023), a 38% decrease. Reported emissions went from 5,140 tCO₂e to 2,401 tCO₂e over the same span (down 53%).
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. 20 North Clark Street - 2821's 38.5 kBtu/ft² across 445,973 sq ft works out to about 17.2 billion Btu (5,032 MWh-equivalent) in 2023. Its source EUI of 107.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 5,028,144 kWh of electricity and 2,098 thousand gallons of water for the year.
Which law requires 20 North Clark Street - 2821 to report its energy use?
20 North Clark Street - 2821 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:103739:2023). 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
- 550 W Jackson Boulevard· 442,613 sq ft · score 65 (C)
- Presidents Plaza 2· 441,327 sq ft · score 78 (B)
- 55 E. Jackson AcOuisitions LLC· 434,169 sq ft · score 53 (D)
- Chicago Transit Authority - 567 W Lake Street· 434,052 sq ft · score 74 (B)
- 311 West Monroe· 425,816 sq ft · score 80 (B)
- 121 West Wacker Drive AKA 221 N La Salle Street· 417,599 sq ft · score 72 (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 20 North Clark Street - 2821's energy grade?
20 North Clark Street - 2821 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 20 North Clark Street - 2821 use?
Its 2023 site energy-use intensity was 38.5 kBtu/ft² (107.7 kBtu/ft² source) across 445,973 sq ft, including 5,028,144 kWh of electricity.
What are 20 North Clark Street - 2821's carbon emissions?
20 North Clark Street - 2821 reported 2,401 tCO₂e of greenhouse-gas emissions (5.4 kgCO₂e/ft²) for 2023.
Where is 20 North Clark Street - 2821?
20 North Clark Street - 2821 is in Chicago, Illinois 60602. Its coordinates are 41.87822, -87.63452 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is 20 North Clark Street - 2821 and when was it built?
20 North Clark Street - 2821 has 445,973 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1981 as its year built. It is classed as office.
Is 20 North Clark Street - 2821 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, “20 North Clark Street - 2821, Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/20-north-clark-street-2821-233f60ef (data as of October 2, 2026).