At a glance
GX Property Owner LLC is a 226,740-square-foot office building at 2545 W Diversey Ave in Chicago, Illinois, built in 1914. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 90 out of 100 (grade A), a site energy-use intensity of 65.1 kBtu/ft² and 1,532 tCO₂e of greenhouse-gas emissions. That score is higher than 89% of the 320 scored office buildings in Chicago.
Building Energy Use Benchmarking Ordinance · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 90 (band A) |
| Site EUI | 65.1 kBtu/ft² |
| Source EUI | 140.0 kBtu/ft² |
| GHG emissions | 1,532 tCO₂e |
| GHG intensity | 6.8 kgCO₂e/ft² |
| Electricity | 2,723,256 kWh |
| Natural gas | 54,583 therms |
| Water use | 2 kgal |
| Gross floor area | 226,740 sq ft |
| Source record | chicago:160157:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 90 | ±0 | 65.1 kBtu/ft² | 1,532 tCO₂e |
| 2022 | 90 | ±0 | 68.3 kBtu/ft² | 1,537 tCO₂e |
| 2021 | 90 | ±0 | 63.6 kBtu/ft² | 1,612 tCO₂e |
| 2020 | 90 | +15 | 63.1 kBtu/ft² | 1,744 tCO₂e |
| 2019 | 75 | -2 | 106.8 kBtu/ft² | — |
| 2018 | 77 | -11 | 83.5 kBtu/ft² | 2,371 tCO₂e |
| 2017 | 88 | +2 | 78.2 kBtu/ft² | 2,545 tCO₂e |
| 2016 | 86 | +5 | 79.5 kBtu/ft² | 2,640 tCO₂e |
| 2015 | 81 | 86.8 kBtu/ft² | 3,135 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
- 2545 W Diversey Ave
- City
- Chicago
- State
- Illinois
- ZIP
- 60647
- Coordinates
- 41.79353, -87.61580
Within ~1 km
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See also: most efficient in Chicago · biggest emitters
How does GX Property Owner LLC compare with other office buildings in Chicago?
The latest disclosures cover 387 office buildings in Chicago, out of 3,852 buildings citywide. GX Property Owner LLC's ENERGY STAR score of 90 compares with an average of 69 across the 320 that report a score; it scores higher than 89% of them and lower than 9%. Its site EUI of 65.1 kBtu/ft² is roughly in line with 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 6.8 kgCO₂e/ft² is roughly in line with the group average of 7.5 kgCO₂e/ft².
At 226,740 sq ft, it is about half of the average floor area of 488,124 sq ft for those buildings. It was built in 1914, 42 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 GX Property Owner LLC's energy performance changed over time?
BuildingCensus holds 9 Chicago disclosures for GX Property Owner LLC, covering report years 2015–2023. Its ENERGY STAR score went from 81 in 2015 to 90 in 2023 (+9 points); its best year on file was 2020, at 90. Site EUI moved from 86.8 kBtu/ft² (2015) to 65.1 kBtu/ft² (2023), a 25% decrease. Reported emissions went from 3,135 tCO₂e to 1,532 tCO₂e over the same span (down 51%).
What does an ENERGY STAR score of 90 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 90 means the building performs better than about 90% of its national peers. BuildingCensus bands the score into report-card grades; 90 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. GX Property Owner LLC's 65.1 kBtu/ft² across 226,740 sq ft works out to about 14.8 billion Btu (4,326 MWh-equivalent) in 2023. Its source EUI of 140.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,723,256 kWh of electricity, 54,583 therms of natural gas and 2 thousand gallons of water for the year.
Which law requires GX Property Owner LLC to report its energy use?
GX Property Owner LLC 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:160157:2023). 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
- 1010 W 35Th St· 224,000 sq ft · score 90 (A)
- Michigan 30 LLC· 222,125 sq ft · score 51 (D)
- 1700-GGP Headquarters· 221,383 sq ft · score 97 (A)
- 2150 S Canalport Avenue· 221,330 sq ft · EUI 32.0 kBtu/ft²
- Old Republic Building· 219,636 sq ft · score 77 (B)
- Lewis Towers-ID# 174182· 216,081 sq ft · score 77 (B)
- Office buildings in Chicago· 387 benchmarked
- All Chicago benchmarked buildings· Building Energy Use Benchmarking Ordinance
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- Least efficient large buildings in Chicago
- Biggest emitters in Chicago
Frequently asked questions
What is GX Property Owner LLC's energy grade?
GX Property Owner LLC scores 90 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 GX Property Owner LLC use?
Its 2023 site energy-use intensity was 65.1 kBtu/ft² (140.0 kBtu/ft² source) across 226,740 sq ft, including 2,723,256 kWh of electricity and 54,583 therms of natural gas.
What are GX Property Owner LLC's carbon emissions?
GX Property Owner LLC reported 1,532 tCO₂e of greenhouse-gas emissions (6.8 kgCO₂e/ft²) for 2023.
Where is GX Property Owner LLC?
GX Property Owner LLC is at 2545 W Diversey Ave, in Chicago, Illinois 60647. Its coordinates are 41.79353, -87.61580 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is GX Property Owner LLC and when was it built?
GX Property Owner LLC has 226,740 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1914 as its year built. It is classed as office.
Is GX Property Owner LLC 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, “GX Property Owner LLC, Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/gx-property-owner-llc-7787a7ee (data as of October 2, 2026).