At a glance
The Westin Michigan Avenue is a 546,219-square-foot hotel at 909 North Michigan Avenue in Chicago, Illinois, built in 1963. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 49 out of 100 (grade D), a site energy-use intensity of 117.8 kBtu/ft² and 5,645 tCO₂e of greenhouse-gas emissions. That score is higher than 40% of the 77 scored hotel buildings in Chicago.
Building Energy Use Benchmarking Ordinance · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 49 (band D) |
| Site EUI | 117.8 kBtu/ft² |
| Source EUI | 205.9 kBtu/ft² |
| GHG emissions | 5,645 tCO₂e |
| GHG intensity | 10.3 kgCO₂e/ft² |
| Electricity | 7,517,973 kWh |
| Natural gas | 387,020 therms |
| Gross floor area | 546,219 sq ft |
| Source record | chicago:156845:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 49 | +1 | 117.8 kBtu/ft² | 5,645 tCO₂e |
| 2022 | 48 | -32 | 125.3 kBtu/ft² | 5,690 tCO₂e |
| 2021 | 80 | -12 | 89.6 kBtu/ft² | 4,426 tCO₂e |
| 2020 | 92 | +55 | 84.1 kBtu/ft² | 3,761 tCO₂e |
| 2019 | 37 | +2 | 132.6 kBtu/ft² | 4,446 tCO₂e |
| 2018 | 35 | +1 | 137.2 kBtu/ft² | 4,588 tCO₂e |
| 2017 | 34 | +1 | 142.7 kBtu/ft² | 7,924 tCO₂e |
| 2016 | 33 | +4 | 143.5 kBtu/ft² | 8,174 tCO₂e |
| 2015 | 29 | 152.2 kBtu/ft² | 8,897 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
- 909 North Michigan Avenue
- City
- Chicago
- State
- Illinois
- ZIP
- 60611
- Coordinates
- 41.80112, -87.70392
Within ~1 km
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See also: most efficient in Chicago · biggest emitters
How does The Westin Michigan Avenue compare with other hotel buildings in Chicago?
The latest disclosures cover 88 hotel buildings in Chicago, out of 3,852 buildings citywide. The Westin Michigan Avenue's ENERGY STAR score of 49 compares with an average of 51 across the 77 that report a score; it scores higher than 40% of them and lower than 56%. Its site EUI of 117.8 kBtu/ft² is roughly in line with the average of 110.1 kBtu/ft². Its emissions intensity of 10.3 kgCO₂e/ft² is roughly in line with the group average of 10.1 kgCO₂e/ft².
At 546,219 sq ft, it is about 59% above the average floor area of 343,808 sq ft for those buildings. It was built in 1963, 16 years earlier than the group's average year built (1979). Across all 24 jurisdictions BuildingCensus covers, the 3,812 hotel buildings average an ENERGY STAR score of 65 and a site EUI of 77.8 kBtu/ft².
How has The Westin Michigan Avenue's energy performance changed over time?
BuildingCensus holds 9 Chicago disclosures for The Westin Michigan Avenue, covering report years 2015–2023. Its ENERGY STAR score went from 29 in 2015 to 49 in 2023 (+20 points); its best year on file was 2020, at 92. Site EUI moved from 152.2 kBtu/ft² (2015) to 117.8 kBtu/ft² (2023), a 23% decrease. Reported emissions went from 8,897 tCO₂e to 5,645 tCO₂e over the same span (down 37%).
What does an ENERGY STAR score of 49 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 49 means the building performs better than about 49% of its national peers. BuildingCensus bands the score into report-card grades; 49 falls in band D — lowest band (1–54). It sits 26 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. The Westin Michigan Avenue's 117.8 kBtu/ft² across 546,219 sq ft works out to about 64.3 billion Btu (18,858 MWh-equivalent) in 2023. Its source EUI of 205.9 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 7,517,973 kWh of electricity and 387,020 therms of natural gas for the year.
Which law requires The Westin Michigan Avenue to report its energy use?
The Westin Michigan Avenue 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:156845:2023). Covered buildings that fail to benchmark and report face fines of up to $100 plus $25 per day of violation under the ordinance.
More hotel buildings in Chicago
- 9672e-CHISR-Renaissance Chicago Hotel· 537,323 sq ft · score 53 (D)
- HLT Chicago O'Hare Airport, IL-SV· 515,556 sq ft · score 72 (B)
- The Shops at North Bridge· 475,883 sq ft · EUI 55.0 kBtu/ft²
- Omni Hotel· 440,281 sq ft · score 25 (D)
- Chicago-Downtown/Lakefront Embassy Suite· 425,940 sq ft · score 10 (D)
- DT Chicago Magnificent Mile, IL-SV· 421,989 sq ft · score 80 (B)
- Hotel buildings in Chicago· 88 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 The Westin Michigan Avenue's energy grade?
The Westin Michigan Avenue scores 49 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 The Westin Michigan Avenue use?
Its 2023 site energy-use intensity was 117.8 kBtu/ft² (205.9 kBtu/ft² source) across 546,219 sq ft, including 7,517,973 kWh of electricity and 387,020 therms of natural gas.
What are The Westin Michigan Avenue's carbon emissions?
The Westin Michigan Avenue reported 5,645 tCO₂e of greenhouse-gas emissions (10.3 kgCO₂e/ft²) for 2023.
Where is The Westin Michigan Avenue?
The Westin Michigan Avenue is at 909 North Michigan Avenue, in Chicago, Illinois 60611. Its coordinates are 41.80112, -87.70392 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is The Westin Michigan Avenue and when was it built?
The Westin Michigan Avenue has 546,219 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1963 as its year built. It is classed as hotel.
Is The Westin Michigan Avenue 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, “The Westin Michigan Avenue, Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/the-westin-michigan-avenue-bb6e0746 (data as of October 2, 2026).