Millennium Park Plaza
Multifamily Housing in Chicago, IL · 151-155 N Michigan Ave · 60601
At a glance
Millennium Park Plaza is a 610,694-square-foot multifamily housing building at 151-155 N Michigan Ave in Chicago, Illinois, built in 1982. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 4 out of 100 (grade D), a site energy-use intensity of 93.5 kBtu/ft² and 6,284 tCO₂e of greenhouse-gas emissions. That score is higher than 1% of the 1,472 scored multifamily housing buildings in Chicago.
Building Energy Use Benchmarking Ordinance · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 4 (band D) |
| Site EUI | 93.5 kBtu/ft² |
| Source EUI | 205.5 kBtu/ft² |
| GHG emissions | 6,284 tCO₂e |
| GHG intensity | 10.3 kgCO₂e/ft² |
| Electricity | 10,971,083 kWh |
| Natural gas | 196,902 therms |
| Gross floor area | 610,694 sq ft |
| Source record | chicago:160279:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 4 | +2 | 93.5 kBtu/ft² | 6,284 tCO₂e |
| 2022 | 2 | ±0 | 108.6 kBtu/ft² | 6,926 tCO₂e |
| 2021 | 2 | ±0 | 107.2 kBtu/ft² | 7,350 tCO₂e |
| 2020 | 2 | +1 | 106.7 kBtu/ft² | 7,876 tCO₂e |
| 2019 | 1 | ±0 | 122.4 kBtu/ft² | 9,600 tCO₂e |
| 2018 | 1 | ±0 | 124.7 kBtu/ft² | 9,783 tCO₂e |
| 2017 | 1 | ±0 | 117.6 kBtu/ft² | 10,071 tCO₂e |
| 2016 | 1 | 115.6 kBtu/ft² | 9,910 tCO₂e | |
| 2015 | — | 116.9 kBtu/ft² | 10,808 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.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 151-155 N Michigan Ave
- City
- Chicago
- State
- Illinois
- ZIP
- 60601
- Coordinates
- 41.90260, -87.63009
Within ~1 km
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- 680 North Lake Shore Drivescore 87
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See also: most efficient in Chicago · biggest emitters
How does Millennium Park Plaza compare with other multifamily housing buildings in Chicago?
The latest disclosures cover 1,515 multifamily housing buildings in Chicago, out of 3,852 buildings citywide. Millennium Park Plaza's ENERGY STAR score of 4 compares with an average of 62 across the 1,472 that report a score; it scores higher than 1% of them and lower than 98%. Its site EUI of 93.5 kBtu/ft² is about 30% above the average of 72.0 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 10.3 kgCO₂e/ft² is about 78% above the group average of 5.8 kgCO₂e/ft².
At 610,694 sq ft, it is about 196% above the average floor area of 206,097 sq ft for those buildings. It was built in 1982, 11 years later than the group's average year built (1971). Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².
How has Millennium Park Plaza's energy performance changed over time?
BuildingCensus holds 9 Chicago disclosures for Millennium Park Plaza, covering report years 2015–2023. Its ENERGY STAR score went from 1 in 2016 to 4 in 2023 (+3 points). Site EUI moved from 116.9 kBtu/ft² (2015) to 93.5 kBtu/ft² (2023), a 20% decrease. Reported emissions went from 10,808 tCO₂e to 6,284 tCO₂e over the same span (down 42%).
What does an ENERGY STAR score of 4 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 4 means the building performs better than about 4% of its national peers. BuildingCensus bands the score into report-card grades; 4 falls in band D — lowest band (1–54). It sits 71 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. Millennium Park Plaza's 93.5 kBtu/ft² across 610,694 sq ft works out to about 57.1 billion Btu (16,734 MWh-equivalent) in 2023. Its source EUI of 205.5 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 10,971,083 kWh of electricity and 196,902 therms of natural gas for the year.
Which law requires Millennium Park Plaza to report its energy use?
Millennium Park Plaza 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:160279:2023). Covered buildings that fail to benchmark and report face fines of up to $100 plus $25 per day of violation under the ordinance.
More multifamily housing buildings in Chicago
- (IL1071) - The Pinnacle Condo (21 E. Huron St)· 610,691 sq ft · score 11 (D)
- Tower Park Residences: 1235 South Prairie Avenue· 605,856 sq ft · score 78 (B)
- 474 North Lake Shore Drive· 603,888 sq ft · score 91 (A)
- 400 North LaSalle Condominium Association· 597,736 sq ft · score 62 (C)
- 210 N Wells St· 597,377 sq ft · score 20 (D)
- The Sinclair (nl97) (sz63)· 595,002 sq ft · score 47 (D)
- Multifamily Housing buildings in Chicago· 1,515 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 Millennium Park Plaza's energy grade?
Millennium Park Plaza scores 4 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 Millennium Park Plaza use?
Its 2023 site energy-use intensity was 93.5 kBtu/ft² (205.5 kBtu/ft² source) across 610,694 sq ft, including 10,971,083 kWh of electricity and 196,902 therms of natural gas.
What are Millennium Park Plaza's carbon emissions?
Millennium Park Plaza reported 6,284 tCO₂e of greenhouse-gas emissions (10.3 kgCO₂e/ft²) for 2023.
Where is Millennium Park Plaza?
Millennium Park Plaza is at 151-155 N Michigan Ave, in Chicago, Illinois 60601. Its coordinates are 41.90260, -87.63009 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is Millennium Park Plaza and when was it built?
Millennium Park Plaza has 610,694 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1982 as its year built. It is classed as multifamily housing.
Is Millennium Park Plaza 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, “Millennium Park Plaza, Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/millennium-park-plaza-eefe3c8a (data as of October 2, 2026).