At a glance
Chicago Medical Society is a 52,284-square-foot office building at 515 N Dearborn in Chicago, Illinois, built in 1925. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 77 out of 100 (grade B), a site energy-use intensity of 61.3 kBtu/ft² and 269 tCO₂e of greenhouse-gas emissions. That score is higher than 57% of the 320 scored office buildings in Chicago.
Building Energy Use Benchmarking Ordinance · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 77 (band B) |
| Site EUI | 61.3 kBtu/ft² |
| Source EUI | 102.5 kBtu/ft² |
| GHG emissions | 269 tCO₂e |
| GHG intensity | 5.1 kgCO₂e/ft² |
| Electricity | 334,460 kWh |
| Natural gas | 20,629 therms |
| Water use | 1 kgal |
| Gross floor area | 52,284 sq ft |
| Source record | chicago:156782:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 77 | +1 | 61.3 kBtu/ft² | 269 tCO₂e |
| 2022 | 76 | -1 | 68.4 kBtu/ft² | 276 tCO₂e |
| 2021 | 77 | -6 | 68.5 kBtu/ft² | 276 tCO₂e |
| 2020 | 83 | +6 | 57.1 kBtu/ft² | 263 tCO₂e |
| 2019 | 77 | +18 | 61.5 kBtu/ft² | 314 tCO₂e |
| 2018 | 59 | -5 | 72.0 kBtu/ft² | 360 tCO₂e |
| 2017 | 64 | -24 | 63.1 kBtu/ft² | 338 tCO₂e |
| 2016 | 88 | +3 | 61.5 kBtu/ft² | 373 tCO₂e |
| 2015 | 85 | 70.2 kBtu/ft² | 422 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
- 515 N Dearborn
- City
- Chicago
- State
- Illinois
- ZIP
- 60654
- Coordinates
- 41.91094, -87.63181
Within ~1 km
Nearby benchmarked buildings
- Old Post Officescore 88
Office · 2,493,160 sq ft
- Michigan Plazascore 43
Office · 1,867,610 sq ft
- 333 West Wackerscore 77
Office · 1,012,961 sq ft
- 100 North Riverside Plazascore —
Office · 874,519 sq ft
Multifamily Housing · 749,100 sq ft
- River Plazascore 40
Multifamily Housing · 734,298 sq ft
See also: most efficient in Chicago · biggest emitters
How does Chicago Medical Society compare with other office buildings in Chicago?
The latest disclosures cover 387 office buildings in Chicago, out of 3,852 buildings citywide. Chicago Medical Society's ENERGY STAR score of 77 compares with an average of 69 across the 320 that report a score; it scores higher than 57% of them and lower than 40%. Its site EUI of 61.3 kBtu/ft² is about 13% below the average of 70.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 5.1 kgCO₂e/ft² is about 32% below the group average of 7.5 kgCO₂e/ft².
At 52,284 sq ft, it is about 89% below the average floor area of 488,124 sq ft for those buildings. It was built in 1925, 31 years earlier than the group's average year built (1957). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has Chicago Medical Society's energy performance changed over time?
BuildingCensus holds 9 Chicago disclosures for Chicago Medical Society, covering report years 2015–2023. Its ENERGY STAR score went from 85 in 2015 to 77 in 2023 (-8 points); its best year on file was 2016, at 88. Site EUI moved from 70.2 kBtu/ft² (2015) to 61.3 kBtu/ft² (2023), a 13% decrease. Reported emissions went from 422 tCO₂e to 269 tCO₂e over the same span (down 36%).
What does an ENERGY STAR score of 77 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 77 means the building performs better than about 77% of its national peers. BuildingCensus bands the score into report-card grades; 77 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. Chicago Medical Society's 61.3 kBtu/ft² across 52,284 sq ft works out to about 3.2 billion Btu (939 MWh-equivalent) in 2023. Its source EUI of 102.5 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 334,460 kWh of electricity, 20,629 therms of natural gas and 1 thousand gallons of water for the year.
Which law requires Chicago Medical Society to report its energy use?
Chicago Medical Society 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:156782:2023). Covered buildings that fail to benchmark and report face fines of up to $100 plus $25 per day of violation under the ordinance.
More office buildings in Chicago
- 412 N Wells· 51,190 sq ft · score 32 (D)
- Plumbers Local 130 UA· 51,130 sq ft · EUI 106.9 kBtu/ft²
- Goodman Theatre· 50,913 sq ft · EUI 157.7 kBtu/ft²
- 372 West Ontario Street· 50,078 sq ft · score 83 (B)
- 747 N LASALLE DR· 45,000 sq ft · EUI 37.6 kBtu/ft²
- Evangelical Covenant Church· 44,575 sq ft · score 22 (D)
- Office buildings in Chicago· 387 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 Chicago Medical Society's energy grade?
Chicago Medical Society scores 77 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 Chicago Medical Society use?
Its 2023 site energy-use intensity was 61.3 kBtu/ft² (102.5 kBtu/ft² source) across 52,284 sq ft, including 334,460 kWh of electricity and 20,629 therms of natural gas.
What are Chicago Medical Society's carbon emissions?
Chicago Medical Society reported 269 tCO₂e of greenhouse-gas emissions (5.1 kgCO₂e/ft²) for 2023.
Where is Chicago Medical Society?
Chicago Medical Society is at 515 N Dearborn, in Chicago, Illinois 60654. Its coordinates are 41.91094, -87.63181 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is Chicago Medical Society and when was it built?
Chicago Medical Society has 52,284 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1925 as its year built. It is classed as office.
Is Chicago Medical Society 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, “Chicago Medical Society, Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/chicago-medical-society-7ac1bf7e (data as of October 2, 2026).