At a glance
605 N Michigan Ave is a 105,000-square-foot office building in Chicago, Illinois, built in 1922. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 66 out of 100 (grade C), a site energy-use intensity of 55.4 kBtu/ft² and 814 tCO₂e of greenhouse-gas emissions. That score is higher than 33% of the 320 scored office buildings in Chicago.
Building Energy Use Benchmarking Ordinance · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 66 (band C) |
| Site EUI | 55.4 kBtu/ft² |
| Source EUI | 155.0 kBtu/ft² |
| GHG emissions | 814 tCO₂e |
| GHG intensity | 7.7 kgCO₂e/ft² |
| Electricity | 1,703,980 kWh |
| Gross floor area | 105,000 sq ft |
| Source record | chicago:132278:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 66 | +6 | 55.4 kBtu/ft² | 814 tCO₂e |
| 2022 | 60 | -8 | 61.7 kBtu/ft² | 853 tCO₂e |
| 2021 | 68 | 54.8 kBtu/ft² | 821 tCO₂e | |
| 2020 | — | 72.9 kBtu/ft² | 938 tCO₂e | |
| 2019 | — | 92.8 kBtu/ft² | 1,272 tCO₂e | |
| 2018 | — | 93.8 kBtu/ft² | 1,285 tCO₂e | |
| 2015 | — | 103.0 kBtu/ft² | 1,089 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
- 605 N Michigan Ave
- City
- Chicago
- State
- Illinois
- ZIP
- 60611
- Coordinates
- 41.82575, -87.61752
Within ~1 km
Nearby benchmarked buildings
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- 3711 S VINCENNES AVEscore 100
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- El Lago Condominium Associationscore 27
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- De La Salle Institutescore —
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- National Teachersscore 4
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See also: most efficient in Chicago · biggest emitters
How does 605 N Michigan Ave compare with other office buildings in Chicago?
The latest disclosures cover 387 office buildings in Chicago, out of 3,852 buildings citywide. 605 N Michigan Ave's ENERGY STAR score of 66 compares with an average of 69 across the 320 that report a score; it scores higher than 33% of them and lower than 66%. Its site EUI of 55.4 kBtu/ft² is about 21% 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 7.7 kgCO₂e/ft² is roughly in line with the group average of 7.5 kgCO₂e/ft².
At 105,000 sq ft, it is about 78% below the average floor area of 488,124 sq ft for those buildings. It was built in 1922, 34 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 605 N Michigan Ave's energy performance changed over time?
BuildingCensus holds 7 Chicago disclosures for 605 N Michigan Ave, covering report years 2015, 2018, 2019, 2020, 2021, 2022, 2023. Its ENERGY STAR score went from 68 in 2021 to 66 in 2023 (-2 points); its best year on file was 2021, at 68. Site EUI moved from 103.0 kBtu/ft² (2015) to 55.4 kBtu/ft² (2023), a 46% decrease. Reported emissions went from 1,089 tCO₂e to 814 tCO₂e over the same span (down 25%).
What does an ENERGY STAR score of 66 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 66 means the building performs better than about 66% of its national peers. BuildingCensus bands the score into report-card grades; 66 falls in band C — below median (55–69). It sits 9 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. 605 N Michigan Ave's 55.4 kBtu/ft² across 105,000 sq ft works out to about 5.8 billion Btu (1,705 MWh-equivalent) in 2023. Its source EUI of 155.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,703,980 kWh of electricity for the year.
Which law requires 605 N Michigan Ave to report its energy use?
605 N Michigan Ave 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:132278:2023). 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
- 318 N. Carpenter· 104,849 sq ft · score 98 (A)
- American Library Association· 104,122 sq ft · score 71 (B)
- Rosenwald Hall and Walker Museum· 102,569 sq ft · EUI 74.1 kBtu/ft²
- 1165 Property Owner, LLC· 102,535 sq ft · score 48 (D)
- 420 N Wabash Ave· 102,450 sq ft · score 23 (D)
- 730 North Franklin· 101,235 sq ft · EUI 41.7 kBtu/ft²
- 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 605 N Michigan Ave's energy grade?
605 N Michigan Ave scores 66 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2023 Chicago disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 605 N Michigan Ave use?
Its 2023 site energy-use intensity was 55.4 kBtu/ft² (155.0 kBtu/ft² source) across 105,000 sq ft, including 1,703,980 kWh of electricity.
What are 605 N Michigan Ave's carbon emissions?
605 N Michigan Ave reported 814 tCO₂e of greenhouse-gas emissions (7.7 kgCO₂e/ft²) for 2023.
Where is 605 N Michigan Ave?
605 N Michigan Ave is in Chicago, Illinois 60611. Its coordinates are 41.82575, -87.61752 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is 605 N Michigan Ave and when was it built?
605 N Michigan Ave has 105,000 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1922 as its year built. It is classed as office.
Is 605 N Michigan Ave 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, “605 N Michigan Ave, Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/605-n-michigan-ave-9280c383 (data as of October 2, 2026).