The Legacy at Millennium Park
Multifamily Housing in Chicago, IL · 60 East Monroe St · 60603
At a glance
The Legacy at Millennium Park is a 815,605-square-foot multifamily housing building at 60 East Monroe St in Chicago, Illinois, built in 2009. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 32 out of 100 (grade D) and a site energy-use intensity of 82.2 kBtu/ft². That score is higher than 16% 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 | 32 (band D) |
| Site EUI | 82.2 kBtu/ft² |
| Source EUI | 138.1 kBtu/ft² |
| GHG emissions | — |
| GHG intensity | — |
| Electricity | 7,530,967 kWh |
| Natural gas | 216,875 therms |
| Gross floor area | 815,605 sq ft |
| Source record | chicago:251341:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 32 | -14 | 82.2 kBtu/ft² | — |
| 2022 | 46 | +2 | 81.2 kBtu/ft² | — |
| 2021 | 44 | -1 | 80.3 kBtu/ft² | — |
| 2020 | 45 | +23 | 78.4 kBtu/ft² | — |
| 2019 | 22 | +9 | 79.7 kBtu/ft² | — |
| 2018 | 13 | +5 | 86.0 kBtu/ft² | — |
| 2017 | 8 | -11 | 80.0 kBtu/ft² | — |
| 2016 | 19 | +3 | 59.9 kBtu/ft² | 8,337 tCO₂e |
| 2015 | 16 | 59.5 kBtu/ft² | 9,137 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
- 60 East Monroe St
- City
- Chicago
- State
- Illinois
- ZIP
- 60603
- Coordinates
- 41.83598, -87.61154
Within ~1 km
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How does The Legacy at Millennium Park 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. The Legacy at Millennium Park's ENERGY STAR score of 32 compares with an average of 62 across the 1,472 that report a score; it scores higher than 16% of them and lower than 83%. Its site EUI of 82.2 kBtu/ft² is about 14% above the average of 72.0 kBtu/ft² — it uses more energy per square foot than the typical building in that group.
At 815,605 sq ft, it is about 296% above the average floor area of 206,097 sq ft for those buildings. It was built in 2009, 38 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 The Legacy at Millennium Park's energy performance changed over time?
BuildingCensus holds 9 Chicago disclosures for The Legacy at Millennium Park, covering report years 2015–2023. Its ENERGY STAR score went from 16 in 2015 to 32 in 2023 (+16 points); its best year on file was 2022, at 46. Site EUI moved from 59.5 kBtu/ft² (2015) to 82.2 kBtu/ft² (2023), an 38% increase. Reported emissions went from 9,137 tCO₂e to 8,337 tCO₂e over the same span (down 9%).
What does an ENERGY STAR score of 32 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 32 means the building performs better than about 32% of its national peers. BuildingCensus bands the score into report-card grades; 32 falls in band D — lowest band (1–54). It sits 43 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 Legacy at Millennium Park's 82.2 kBtu/ft² across 815,605 sq ft works out to about 67 billion Btu (19,648 MWh-equivalent) in 2023. Its source EUI of 138.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 7,530,967 kWh of electricity and 216,875 therms of natural gas for the year.
Which law requires The Legacy at Millennium Park to report its energy use?
The Legacy at Millennium Park 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:251341:2023). 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
- OneEleven (nl025, nl026)· 810,402 sq ft · score 29 (D)
- (IL635) - 600 N. Lake Shore Drive Condominium Association (600 N. Lake Shore Dr)· 808,695 sq ft · score 48 (D)
- 340 on the Park· 801,566 sq ft · score 25 (D)
- 235 W. Van Buren Condo Association· 801,360 sq ft · score 68 (C)
- (IL1041) - Marina Towers (300 N State St)· 794,774 sq ft · score 81 (B)
- 2626 Lakeview Condominium· 787,000 sq ft · score 87 (A)
- 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 The Legacy at Millennium Park's energy grade?
The Legacy at Millennium Park scores 32 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 Legacy at Millennium Park use?
Its 2023 site energy-use intensity was 82.2 kBtu/ft² (138.1 kBtu/ft² source) across 815,605 sq ft, including 7,530,967 kWh of electricity and 216,875 therms of natural gas.
What are The Legacy at Millennium Park's carbon emissions?
No greenhouse-gas emissions figure was reported for 2023.
Where is The Legacy at Millennium Park?
The Legacy at Millennium Park is at 60 East Monroe St, in Chicago, Illinois 60603. Its coordinates are 41.83598, -87.61154 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is The Legacy at Millennium Park and when was it built?
The Legacy at Millennium Park has 815,605 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 2009 as its year built. It is classed as multifamily housing.
Is The Legacy at Millennium Park 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 Legacy at Millennium Park, Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/the-legacy-at-millennium-park-8799af17 (data as of October 2, 2026).