The Legacy HB at Clarendon Park
Multifamily Housing in Chicago, IL · 4520 N. Clarendon Ave. · 60640
At a glance
The Legacy HB at Clarendon Park is a 74,503-square-foot multifamily housing building at 4520 N. Clarendon Ave. in Chicago, Illinois, built in 1918. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 83 out of 100 (grade B), a site energy-use intensity of 53.1 kBtu/ft² and 359 tCO₂e of greenhouse-gas emissions. That score is higher than 70% 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 | 83 (band B) |
| Site EUI | 53.1 kBtu/ft² |
| Source EUI | 96.1 kBtu/ft² |
| GHG emissions | 359 tCO₂e |
| GHG intensity | 4.8 kgCO₂e/ft² |
| Electricity | 503,237 kWh |
| Natural gas | 22,409 therms |
| Gross floor area | 74,503 sq ft |
| Source record | chicago:116122:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 83 | 53.1 kBtu/ft² | 359 tCO₂e | |
| 2022 | — | — | — | |
| 2021 | 82 | 51.9 kBtu/ft² | 404 tCO₂e | |
| 2020 | — | — | — | |
| 2019 | — | — | — | |
| 2018 | — | — | — |
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
- 4520 N. Clarendon Ave.
- City
- Chicago
- State
- Illinois
- ZIP
- 60640
- Coordinates
- 41.93304, -87.63802
Within ~1 km
Nearby benchmarked buildings
- 900 North Michiganscore —
Mixed Use Property · 2,136,748 sq ft
- 111 South Wackerscore 72
Office · 1,248,730 sq ft
Multifamily Housing · 1,193,624 sq ft
- Altgeld Gardensscore 12
Multifamily Housing · 1,182,400 sq ft
- 500 West Monroescore 87
Office · 1,153,491 sq ft
- The Pavilionscore 73
Multifamily Housing · 1,072,297 sq ft
See also: most efficient in Chicago · biggest emitters
How does The Legacy HB at Clarendon 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 HB at Clarendon Park's ENERGY STAR score of 83 compares with an average of 62 across the 1,472 that report a score; it scores higher than 70% of them and lower than 29%. Its site EUI of 53.1 kBtu/ft² is about 26% below the average of 72.0 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 4.8 kgCO₂e/ft² is about 17% below the group average of 5.8 kgCO₂e/ft².
At 74,503 sq ft, it is about 64% below the average floor area of 206,097 sq ft for those buildings. It was built in 1918, 53 years earlier 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 HB at Clarendon Park's energy performance changed over time?
BuildingCensus holds 6 Chicago disclosures for The Legacy HB at Clarendon Park, covering report years 2018–2023. Its ENERGY STAR score went from 82 in 2021 to 83 in 2023 (+1 points). Site EUI moved from 51.9 kBtu/ft² (2021) to 53.1 kBtu/ft² (2023), an 2% increase. Reported emissions went from 404 tCO₂e to 359 tCO₂e over the same span (down 11%).
What does an ENERGY STAR score of 83 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 83 means the building performs better than about 83% of its national peers. BuildingCensus bands the score into report-card grades; 83 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. The Legacy HB at Clarendon Park's 53.1 kBtu/ft² across 74,503 sq ft works out to about 4 billion Btu (1,159 MWh-equivalent) in 2023. Its source EUI of 96.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 503,237 kWh of electricity and 22,409 therms of natural gas for the year.
Which law requires The Legacy HB at Clarendon Park to report its energy use?
The Legacy HB at Clarendon 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:116122:2023). 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
- The Burnham at Woodlawn Park· 73,673 sq ft · score 96 (A)
- Winchester Hood Garden Homes Trust R-704· 73,600 sq ft · score 41 (D)
- The 1355 West Washington Boulevard Condominium Association· 73,542 sq ft · score 100 (A)
- 7150 Cyril Court Apartments· 73,354 sq ft · score 50 (D)
- 2620 Washington Master Tenant, LLC· 73,016 sq ft · score 78 (B)
- Brandon Shores Condo Association· 73,000 sq ft · score 58 (C)
- 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 HB at Clarendon Park's energy grade?
The Legacy HB at Clarendon Park scores 83 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 The Legacy HB at Clarendon Park use?
Its 2023 site energy-use intensity was 53.1 kBtu/ft² (96.1 kBtu/ft² source) across 74,503 sq ft, including 503,237 kWh of electricity and 22,409 therms of natural gas.
What are The Legacy HB at Clarendon Park's carbon emissions?
The Legacy HB at Clarendon Park reported 359 tCO₂e of greenhouse-gas emissions (4.8 kgCO₂e/ft²) for 2023.
Where is The Legacy HB at Clarendon Park?
The Legacy HB at Clarendon Park is at 4520 N. Clarendon Ave., in Chicago, Illinois 60640. Its coordinates are 41.93304, -87.63802 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is The Legacy HB at Clarendon Park and when was it built?
The Legacy HB at Clarendon Park has 74,503 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1918 as its year built. It is classed as multifamily housing.
Is The Legacy HB at Clarendon 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.
Working with Chicago building benchmarking records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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 HB at Clarendon Park, Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/the-legacy-hb-at-clarendon-park-bd8af957 (data as of October 2, 2026).