At a glance
AG 300 South Wacker Owner LLC is a 598,410-square-foot office building at 300 South Wacker Drive in Chicago, Illinois, built in 1971. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 83 out of 100 (grade B), a site energy-use intensity of 60.6 kBtu/ft² and 3,610 tCO₂e of greenhouse-gas emissions. That score is higher than 75% of the 320 scored office buildings in Chicago.
Building Energy Use Benchmarking Ordinance · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 83 (band B) |
| Site EUI | 60.6 kBtu/ft² |
| Source EUI | 120.4 kBtu/ft² |
| GHG emissions | 3,610 tCO₂e |
| GHG intensity | 6.0 kgCO₂e/ft² |
| Electricity | 5,681,787 kWh |
| Natural gas | 168,948 therms |
| Water use | 4,127 kgal |
| Gross floor area | 598,410 sq ft |
| Source record | chicago:101868:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 83 | +5 | 60.6 kBtu/ft² | 3,610 tCO₂e |
| 2022 | 78 | +5 | 71.7 kBtu/ft² | 4,014 tCO₂e |
| 2021 | 73 | -2 | 65.4 kBtu/ft² | 4,074 tCO₂e |
| 2020 | 75 | ±0 | 68.1 kBtu/ft² | 4,487 tCO₂e |
| 2019 | 75 | +2 | 79.2 kBtu/ft² | — |
| 2018 | 73 | -16 | 74.3 kBtu/ft² | 5,183 tCO₂e |
| 2017 | 89 | +2 | 71.5 kBtu/ft² | 5,695 tCO₂e |
| 2016 | 87 | +2 | 75.4 kBtu/ft² | 5,946 tCO₂e |
| 2015 | 85 | +2 | 77.4 kBtu/ft² | 6,521 tCO₂e |
| 2014 | 83 | 86.0 kBtu/ft² | 6,911 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
- 300 South Wacker Drive
- City
- Chicago
- State
- Illinois
- ZIP
- 60606
- Coordinates
- 41.94041, -87.65122
Within ~1 km
Nearby benchmarked buildings
- One North Wackerscore 80
Office · 1,614,398 sq ft
Multifamily Housing · 757,935 sq ft
- University Center Chicagoscore —
Other - Lodging/Residential · 702,000 sq ft
Multifamily Housing · 565,952 sq ft
Multifamily Housing · 506,142 sq ft
- 1133 N. Dearborn Apartmentsscore 67
Multifamily Housing · 387,600 sq ft
See also: most efficient in Chicago · biggest emitters
How does AG 300 South Wacker Owner LLC compare with other office buildings in Chicago?
The latest disclosures cover 387 office buildings in Chicago, out of 3,852 buildings citywide. AG 300 South Wacker Owner LLC's ENERGY STAR score of 83 compares with an average of 69 across the 320 that report a score; it scores higher than 75% of them and lower than 22%. Its site EUI of 60.6 kBtu/ft² is about 14% 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 6.0 kgCO₂e/ft² is about 20% below the group average of 7.5 kgCO₂e/ft².
At 598,410 sq ft, it is about 23% above the average floor area of 488,124 sq ft for those buildings. It was built in 1971, 15 years later 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 AG 300 South Wacker Owner LLC's energy performance changed over time?
BuildingCensus holds 10 Chicago disclosures for AG 300 South Wacker Owner LLC, covering report years 2014–2023. Its ENERGY STAR score was 83 in both 2014 and 2023. Site EUI moved from 86.0 kBtu/ft² (2014) to 60.6 kBtu/ft² (2023), a 30% decrease. Reported emissions went from 6,911 tCO₂e to 3,610 tCO₂e over the same span (down 48%).
What does an ENERGY STAR score of 83 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 83 means the building performs better than about 83% of its national peers. BuildingCensus bands the score into report-card grades; 83 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. AG 300 South Wacker Owner LLC's 60.6 kBtu/ft² across 598,410 sq ft works out to about 36.3 billion Btu (10,628 MWh-equivalent) in 2023. Its source EUI of 120.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 5,681,787 kWh of electricity, 168,948 therms of natural gas and 4,127 thousand gallons of water for the year.
Which law requires AG 300 South Wacker Owner LLC to report its energy use?
AG 300 South Wacker 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:101868:2023). 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
- Burnham Center· 597,773 sq ft · score 78 (B)
- The National· 580,000 sq ft · score 79 (B)
- 701190 - 1000 West Fulton Market - OPI· 563,066 sq ft · score 87 (A)
- 123 N Wacker· 555,996 sq ft · score 73 (B)
- One North LaSalle· 554,777 sq ft · score 73 (B)
- 200 West Jackson Boulevard Building· 534,330 sq ft · score 71 (B)
- 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 AG 300 South Wacker Owner LLC's energy grade?
AG 300 South Wacker Owner LLC scores 83 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 AG 300 South Wacker Owner LLC use?
Its 2023 site energy-use intensity was 60.6 kBtu/ft² (120.4 kBtu/ft² source) across 598,410 sq ft, including 5,681,787 kWh of electricity and 168,948 therms of natural gas.
What are AG 300 South Wacker Owner LLC's carbon emissions?
AG 300 South Wacker Owner LLC reported 3,610 tCO₂e of greenhouse-gas emissions (6.0 kgCO₂e/ft²) for 2023.
Where is AG 300 South Wacker Owner LLC?
AG 300 South Wacker Owner LLC is at 300 South Wacker Drive, in Chicago, Illinois 60606. Its coordinates are 41.94041, -87.65122 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is AG 300 South Wacker Owner LLC and when was it built?
AG 300 South Wacker Owner LLC has 598,410 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1971 as its year built. It is classed as office.
Is AG 300 South Wacker 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, “AG 300 South Wacker Owner LLC, Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/ag-300-south-wacker-owner-llc-eece8ea7 (data as of October 2, 2026).