At a glance
Onni 200 LaSalle is a 698,645-square-foot office building at 200 N Lasalle Ave in Chicago, Illinois, built in 1984. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 80 out of 100 (grade B), a site energy-use intensity of 43.5 kBtu/ft² and 4,249 tCO₂e of greenhouse-gas emissions. That score is higher than 68% of the 320 scored office buildings in Chicago.
Building Energy Use Benchmarking Ordinance · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 80 (band B) |
| Site EUI | 43.5 kBtu/ft² |
| Source EUI | 121.7 kBtu/ft² |
| GHG emissions | 4,249 tCO₂e |
| GHG intensity | 6.1 kgCO₂e/ft² |
| Electricity | 8,899,888 kWh |
| Gross floor area | 698,645 sq ft |
| Source record | chicago:103644:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 80 | +2 | 43.5 kBtu/ft² | 4,249 tCO₂e |
| 2022 | 78 | +9 | 45.8 kBtu/ft² | 4,217 tCO₂e |
| 2021 | 69 | -8 | 53.2 kBtu/ft² | 5,310 tCO₂e |
| 2020 | 77 | +3 | 46.2 kBtu/ft² | 5,043 tCO₂e |
| 2019 | 74 | +31 | 50.0 kBtu/ft² | 5,814 tCO₂e |
| 2018 | 43 | -31 | 68.9 kBtu/ft² | 8,012 tCO₂e |
| 2017 | 74 | +1 | 63.1 kBtu/ft² | 8,154 tCO₂e |
| 2016 | 73 | +13 | 64.6 kBtu/ft² | 8,325 tCO₂e |
| 2015 | 60 | +13 | 75.5 kBtu/ft² | 10,602 tCO₂e |
| 2014 | 47 | 85.0 kBtu/ft² | 11,950 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
- 200 N Lasalle Ave
- City
- Chicago
- State
- Illinois
- ZIP
- 60601
- Coordinates
- 41.91936, -87.63653
Within ~1 km
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See also: most efficient in Chicago · biggest emitters
How does Onni 200 LaSalle compare with other office buildings in Chicago?
The latest disclosures cover 387 office buildings in Chicago, out of 3,852 buildings citywide. Onni 200 LaSalle's ENERGY STAR score of 80 compares with an average of 69 across the 320 that report a score; it scores higher than 68% of them and lower than 30%. Its site EUI of 43.5 kBtu/ft² is about 38% 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 6.1 kgCO₂e/ft² is about 19% below the group average of 7.5 kgCO₂e/ft².
At 698,645 sq ft, it is about 43% above the average floor area of 488,124 sq ft for those buildings. It was built in 1984, 28 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 Onni 200 LaSalle's energy performance changed over time?
BuildingCensus holds 10 Chicago disclosures for Onni 200 LaSalle, covering report years 2014–2023. Its ENERGY STAR score went from 47 in 2014 to 80 in 2023 (+33 points). Site EUI moved from 85.0 kBtu/ft² (2014) to 43.5 kBtu/ft² (2023), a 49% decrease. Reported emissions went from 11,950 tCO₂e to 4,249 tCO₂e over the same span (down 64%).
What does an ENERGY STAR score of 80 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 80 means the building performs better than about 80% of its national peers. BuildingCensus bands the score into report-card grades; 80 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. Onni 200 LaSalle's 43.5 kBtu/ft² across 698,645 sq ft works out to about 30.4 billion Btu (8,907 MWh-equivalent) in 2023. Its source EUI of 121.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 8,899,888 kWh of electricity for the year.
Which law requires Onni 200 LaSalle to report its energy use?
Onni 200 LaSalle 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:103644:2023). 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
- 801 S Canal St· 680,000 sq ft · score 88 (A)
- 167 N. Green· 677,417 sq ft · score 79 (B)
- 111 West Jackson· 671,519 sq ft · score 70 (B)
- 101 North Wacker· 667,476 sq ft · score 73 (B)
- The Wrigley Building· 661,275 sq ft · score 76 (B)
- 110 NC LLC· 649,985 sq ft · score 87 (A)
- 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 Onni 200 LaSalle's energy grade?
Onni 200 LaSalle scores 80 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 Onni 200 LaSalle use?
Its 2023 site energy-use intensity was 43.5 kBtu/ft² (121.7 kBtu/ft² source) across 698,645 sq ft, including 8,899,888 kWh of electricity.
What are Onni 200 LaSalle's carbon emissions?
Onni 200 LaSalle reported 4,249 tCO₂e of greenhouse-gas emissions (6.1 kgCO₂e/ft²) for 2023.
Where is Onni 200 LaSalle?
Onni 200 LaSalle is at 200 N Lasalle Ave, in Chicago, Illinois 60601. Its coordinates are 41.91936, -87.63653 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is Onni 200 LaSalle and when was it built?
Onni 200 LaSalle has 698,645 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1984 as its year built. It is classed as office.
Is Onni 200 LaSalle 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, “Onni 200 LaSalle, Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/onni-200-lasalle-ee92cada (data as of October 2, 2026).