AlgonOuin #2
Multifamily Housing in Chicago, IL · 1606 E. 50th Street · 60615
At a glance
AlgonOuin #2 is a 59,310-square-foot multifamily housing building at 1606 E. 50th Street in Chicago, Illinois, built in 1950. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 12 out of 100 (grade D), a site energy-use intensity of 95.8 kBtu/ft² and 511 tCO₂e of greenhouse-gas emissions. That score is higher than 5% 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 | 12 (band D) |
| Site EUI | 95.8 kBtu/ft² |
| Source EUI | 171.8 kBtu/ft² |
| GHG emissions | 511 tCO₂e |
| GHG intensity | 8.6 kgCO₂e/ft² |
| Electricity | 707,790 kWh |
| Natural gas | 32,649 therms |
| Gross floor area | 59,310 sq ft |
| Source record | chicago:101703:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 12 | -12 | 95.8 kBtu/ft² | 511 tCO₂e |
| 2022 | 24 | +1 | 112.1 kBtu/ft² | 488 tCO₂e |
| 2021 | 23 | -7 | 124.4 kBtu/ft² | 472 tCO₂e |
| 2020 | 30 | +7 | 118.7 kBtu/ft² | 460 tCO₂e |
| 2019 | 23 | -18 | 131.8 kBtu/ft² | — |
| 2018 | 41 | +10 | 117.3 kBtu/ft² | 454 tCO₂e |
| 2017 | 31 | -25 | 122.0 kBtu/ft² | 480 tCO₂e |
| 2016 | 56 | 104.4 kBtu/ft² | 426 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
- 1606 E. 50th Street
- City
- Chicago
- State
- Illinois
- ZIP
- 60615
- Coordinates
- 41.95464, -87.65157
Within ~1 km
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See also: most efficient in Chicago · biggest emitters
How does AlgonOuin #2 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. AlgonOuin #2's ENERGY STAR score of 12 compares with an average of 62 across the 1,472 that report a score; it scores higher than 5% of them and lower than 94%. Its site EUI of 95.8 kBtu/ft² is about 33% 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 8.6 kgCO₂e/ft² is about 48% above the group average of 5.8 kgCO₂e/ft².
At 59,310 sq ft, it is about 71% below the average floor area of 206,097 sq ft for those buildings. It was built in 1950, 21 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 AlgonOuin #2's energy performance changed over time?
BuildingCensus holds 8 Chicago disclosures for AlgonOuin #2, covering report years 2016–2023. Its ENERGY STAR score went from 56 in 2016 to 12 in 2023 (-44 points); its best year on file was 2016, at 56. Site EUI moved from 104.4 kBtu/ft² (2016) to 95.8 kBtu/ft² (2023), a 8% decrease. Reported emissions went from 426 tCO₂e to 511 tCO₂e over the same span (up 20%).
What does an ENERGY STAR score of 12 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 12 means the building performs better than about 12% of its national peers. BuildingCensus bands the score into report-card grades; 12 falls in band D — lowest band (1–54). It sits 63 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. AlgonOuin #2's 95.8 kBtu/ft² across 59,310 sq ft works out to about 5.7 billion Btu (1,665 MWh-equivalent) in 2023. Its source EUI of 171.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 707,790 kWh of electricity and 32,649 therms of natural gas for the year.
Which law requires AlgonOuin #2 to report its energy use?
AlgonOuin #2 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:101703:2023). 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
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- Reside at Belmont Harbor· 59,150 sq ft · score 88 (A)
- The Studios· 59,094 sq ft · score 66 (C)
- Bicycle Station Lofts Condominium Association· 59,040 sq ft · score 81 (B)
- 1900 W. Farwell, LLC· 59,000 sq ft · score 50 (D)
- Holland Apartments· 59,000 sq ft · score 100 (A)
- Multifamily Housing buildings in Chicago· 1,515 benchmarked
- All Chicago benchmarked buildings· Building Energy Use Benchmarking Ordinance
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Frequently asked questions
What is AlgonOuin #2's energy grade?
AlgonOuin #2 scores 12 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 AlgonOuin #2 use?
Its 2023 site energy-use intensity was 95.8 kBtu/ft² (171.8 kBtu/ft² source) across 59,310 sq ft, including 707,790 kWh of electricity and 32,649 therms of natural gas.
What are AlgonOuin #2's carbon emissions?
AlgonOuin #2 reported 511 tCO₂e of greenhouse-gas emissions (8.6 kgCO₂e/ft²) for 2023.
Where is AlgonOuin #2?
AlgonOuin #2 is at 1606 E. 50th Street, in Chicago, Illinois 60615. Its coordinates are 41.95464, -87.65157 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is AlgonOuin #2 and when was it built?
AlgonOuin #2 has 59,310 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1950 as its year built. It is classed as multifamily housing.
Is AlgonOuin #2 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, “AlgonOuin #2, Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/algonouin-2-57ef4b51 (data as of October 2, 2026).