Mentor Building
Multifamily Housing in Chicago, IL · 39 S STATE ST · 60603
At a glance
Mentor Building is a 72,150-square-foot multifamily housing building at 39 S STATE ST in Chicago, Illinois, built in 1903. In its 2022 Chicago benchmarking disclosure it reported an ENERGY STAR score of 6 out of 100 (grade D), a site energy-use intensity of 94.2 kBtu/ft² and 623 tCO₂e of greenhouse-gas emissions. That score is higher than 2% of the 1,472 scored multifamily housing buildings in Chicago.
Building Energy Use Benchmarking Ordinance · reporting year 2022
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 6 (band D) |
| Site EUI | 94.2 kBtu/ft² |
| Source EUI | 179.8 kBtu/ft² |
| GHG emissions | 623 tCO₂e |
| GHG intensity | 8.6 kgCO₂e/ft² |
| Electricity | 977,624 kWh |
| Natural gas | 34,618 therms |
| Gross floor area | 72,150 sq ft |
| Source record | chicago:156543:2022 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2022latest | 6 | +4 | 94.2 kBtu/ft² | 623 tCO₂e |
| 2021 | 2 | -3 | 112.4 kBtu/ft² | 739 tCO₂e |
| 2020 | 5 | -2 | 95.9 kBtu/ft² | 697 tCO₂e |
| 2019 | 7 | -5 | 88.9 kBtu/ft² | — |
| 2018 | 12 | +4 | 83.1 kBtu/ft² | 681 tCO₂e |
| 2017 | 8 | -3 | 85.5 kBtu/ft² | 744 tCO₂e |
| 2016 | 11 | 78.7 kBtu/ft² | 731 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
- 39 S STATE ST
- City
- Chicago
- State
- Illinois
- ZIP
- 60603
- Coordinates
- 41.88106, -87.62759
Within ~1 km
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- 71215A State Stscore 45
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Multifamily Housing · 1,558,561 sq ft
- Harris Bank Buildingscore —
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See also: most efficient in Chicago · biggest emitters
How does Mentor Building 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. Mentor Building's ENERGY STAR score of 6 compares with an average of 62 across the 1,472 that report a score; it scores higher than 2% of them and lower than 98%. Its site EUI of 94.2 kBtu/ft² is about 31% 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 72,150 sq ft, it is about 65% below the average floor area of 206,097 sq ft for those buildings. It was built in 1903, 68 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 Mentor Building's energy performance changed over time?
BuildingCensus holds 7 Chicago disclosures for Mentor Building, covering report years 2016–2022. Its ENERGY STAR score went from 11 in 2016 to 6 in 2022 (-5 points); its best year on file was 2018, at 12. Site EUI moved from 78.7 kBtu/ft² (2016) to 94.2 kBtu/ft² (2022), an 20% increase. Reported emissions went from 731 tCO₂e to 623 tCO₂e over the same span (down 15%).
What does an ENERGY STAR score of 6 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 6 means the building performs better than about 6% of its national peers. BuildingCensus bands the score into report-card grades; 6 falls in band D — lowest band (1–54). It sits 69 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. Mentor Building's 94.2 kBtu/ft² across 72,150 sq ft works out to about 6.8 billion Btu (1,992 MWh-equivalent) in 2022. Its source EUI of 179.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 977,624 kWh of electricity and 34,618 therms of natural gas for the year.
Which law requires Mentor Building to report its energy use?
Mentor Building 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 2022 disclosure (source record chicago:156543:2022). 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
- Dearborn I LLC· 72,115 sq ft · score 61 (C)
- Reside on Wellington· 72,000 sq ft · score 68 (C)
- 30 E. Division Condominium Association· 72,000 sq ft · score 20 (D)
- 607 Wrightwood Condominium Association· 72,000 sq ft · score 63 (C)
- 2755 N Milwaukee Avenue· 72,000 sq ft · score 91 (A)
- Cornerstone Apartments· 71,864 sq ft · score 57 (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 Mentor Building's energy grade?
Mentor Building scores 6 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2022 Chicago disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Mentor Building use?
Its 2022 site energy-use intensity was 94.2 kBtu/ft² (179.8 kBtu/ft² source) across 72,150 sq ft, including 977,624 kWh of electricity and 34,618 therms of natural gas.
What are Mentor Building's carbon emissions?
Mentor Building reported 623 tCO₂e of greenhouse-gas emissions (8.6 kgCO₂e/ft²) for 2022.
Where is Mentor Building?
Mentor Building is at 39 S STATE ST, in Chicago, Illinois 60603. Its coordinates are 41.88106, -87.62759 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is Mentor Building and when was it built?
Mentor Building has 72,150 sq ft of gross floor area, as reported in its 2022 disclosure. The disclosure lists 1903 as its year built. It is classed as multifamily housing.
Is Mentor Building covered by the Building Energy Use Benchmarking Ordinance?
Yes — it appears in the 2022 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, “Mentor Building, Chicago, Illinois — 2022 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/mentor-building-fccd39ee (data as of October 2, 2026).