Henry Horner Annex
Multifamily Housing in Chicago, IL · 1815 W. Monroe Street · 60612
At a glance
Henry Horner Annex is a 102,000-square-foot multifamily housing building at 1815 W. Monroe Street in Chicago, Illinois, built in 1969. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 93 out of 100 (grade A), a site energy-use intensity of 46.5 kBtu/ft² and 420 tCO₂e of greenhouse-gas emissions. That score is higher than 85% 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 | 93 (band A) |
| Site EUI | 46.5 kBtu/ft² |
| Source EUI | 82.0 kBtu/ft² |
| GHG emissions | 420 tCO₂e |
| GHG intensity | 4.1 kgCO₂e/ft² |
| Electricity | 567,298 kWh |
| Natural gas | 28,023 therms |
| Gross floor area | 102,000 sq ft |
| Source record | chicago:250078:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 93 | -1 | 46.5 kBtu/ft² | 420 tCO₂e |
| 2022 | 94 | 50.0 kBtu/ft² | 436 tCO₂e | |
| 2021 | — | — | — | |
| 2020 | — | — | — | |
| 2019 | — | — | — | |
| 2018 | 100 | ±0 | 19.8 kBtu/ft² | 904 tCO₂e |
| 2017 | 100 | ±0 | 19.3 kBtu/ft² | 918 tCO₂e |
| 2016 | 100 | ±0 | 17.6 kBtu/ft² | 864 tCO₂e |
| 2015 | 100 | 16.4 kBtu/ft² | 622 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
- 1815 W. Monroe Street
- City
- Chicago
- State
- Illinois
- ZIP
- 60612
- Coordinates
- 41.87686, -87.62780
Within ~1 km
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See also: most efficient in Chicago · biggest emitters
How does Henry Horner Annex 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. Henry Horner Annex's ENERGY STAR score of 93 compares with an average of 62 across the 1,472 that report a score; it scores higher than 85% of them and lower than 13%. Its site EUI of 46.5 kBtu/ft² is about 35% 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 4.1 kgCO₂e/ft² is about 29% below the group average of 5.8 kgCO₂e/ft².
At 102,000 sq ft, it is about half of the average floor area of 206,097 sq ft for those buildings. Its 1969 construction date is close to 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 Henry Horner Annex's energy performance changed over time?
BuildingCensus holds 9 Chicago disclosures for Henry Horner Annex, covering report years 2015–2023. Its ENERGY STAR score went from 100 in 2015 to 93 in 2023 (-7 points); its best year on file was 2015, at 100. Site EUI moved from 16.4 kBtu/ft² (2015) to 46.5 kBtu/ft² (2023), an 184% increase. Reported emissions went from 622 tCO₂e to 420 tCO₂e over the same span (down 33%).
What does an ENERGY STAR score of 93 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 93 means the building performs better than about 93% of its national peers. BuildingCensus bands the score into report-card grades; 93 falls in band A — high performer (85–100). 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. Henry Horner Annex's 46.5 kBtu/ft² across 102,000 sq ft works out to about 4.7 billion Btu (1,390 MWh-equivalent) in 2023. Its source EUI of 82.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 567,298 kWh of electricity and 28,023 therms of natural gas for the year.
Which law requires Henry Horner Annex to report its energy use?
Henry Horner Annex 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:250078:2023). 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
- 606 E Woodland Park Avenue· 101,941 sq ft · score 67 (C)
- The Woodlands of Bronzeville Condominium Association· 101,941 sq ft · score 89 (A)
- Commonwealth Apartments LLC· 101,893 sq ft · score 55 (C)
- North Town Village I· 101,814 sq ft · score 93 (A)
- 6825 Sheridan Rd Building Partnership· 101,560 sq ft · score 85 (A)
- Reside 707· 101,428 sq ft · score 59 (C)
- Multifamily Housing buildings in Chicago· 1,515 benchmarked
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Frequently asked questions
What is Henry Horner Annex's energy grade?
Henry Horner Annex scores 93 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2023 Chicago disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Henry Horner Annex use?
Its 2023 site energy-use intensity was 46.5 kBtu/ft² (82.0 kBtu/ft² source) across 102,000 sq ft, including 567,298 kWh of electricity and 28,023 therms of natural gas.
What are Henry Horner Annex's carbon emissions?
Henry Horner Annex reported 420 tCO₂e of greenhouse-gas emissions (4.1 kgCO₂e/ft²) for 2023.
Where is Henry Horner Annex?
Henry Horner Annex is at 1815 W. Monroe Street, in Chicago, Illinois 60612. Its coordinates are 41.87686, -87.62780 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is Henry Horner Annex and when was it built?
Henry Horner Annex has 102,000 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1969 as its year built. It is classed as multifamily housing.
Is Henry Horner Annex 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, “Henry Horner Annex, Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/henry-horner-annex-7c943028 (data as of October 2, 2026).