Locke J
K-12 School in Chicago, IL · 2828 N Oak Park Ave · 60634
At a glance
Locke J is a 108,400-square-foot K-12 school at 2828 N Oak Park Ave in Chicago, Illinois, built in 1927. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 55 out of 100 (grade C), a site energy-use intensity of 59.7 kBtu/ft² and 564 tCO₂e of greenhouse-gas emissions. That score is higher than 64% of the 365 scored K-12 school buildings in Chicago.
Building Energy Use Benchmarking Ordinance · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 55 (band C) |
| Site EUI | 59.7 kBtu/ft² |
| Source EUI | 103.7 kBtu/ft² |
| GHG emissions | 564 tCO₂e |
| GHG intensity | 5.2 kgCO₂e/ft² |
| Electricity | 742,902 kWh |
| Natural gas | 39,418 therms |
| Gross floor area | 108,400 sq ft |
| Source record | chicago:251657:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 55 | +2 | 59.7 kBtu/ft² | 564 tCO₂e |
| 2022 | 53 | -4 | 67.7 kBtu/ft² | 664 tCO₂e |
| 2021 | 57 | +19 | 59.1 kBtu/ft² | 634 tCO₂e |
| 2020 | 38 | 76.3 kBtu/ft² | 787 tCO₂e | |
| 2019 | — | — | — | |
| 2018 | 37 | -21 | 94.2 kBtu/ft² | 964 tCO₂e |
| 2017 | 58 | -10 | 80.9 kBtu/ft² | 934 tCO₂e |
| 2016 | 68 | -1 | 69.5 kBtu/ft² | 856 tCO₂e |
| 2015 | 69 | 66.8 kBtu/ft² | 903 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
- 2828 N Oak Park Ave
- City
- Chicago
- State
- Illinois
- ZIP
- 60634
- Coordinates
- 41.78040, -87.62184
Within ~1 km
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See also: most efficient in Chicago · biggest emitters
How does Locke J compare with other K-12 school buildings in Chicago?
The latest disclosures cover 543 K-12 school buildings in Chicago, out of 3,852 buildings citywide. Locke J's ENERGY STAR score of 55 compares with an average of 45 across the 365 that report a score; it scores higher than 64% of them and lower than 33%. Its site EUI of 59.7 kBtu/ft² is about 18% below the average of 72.7 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 5.2 kgCO₂e/ft² is about 16% below the group average of 6.2 kgCO₂e/ft².
At 108,400 sq ft, it is about 11% below the average floor area of 121,824 sq ft for those buildings. It was built in 1927, 16 years earlier than the group's average year built (1943). Across all 24 jurisdictions BuildingCensus covers, the 6,548 K-12 school buildings average an ENERGY STAR score of 64 and a site EUI of 52.7 kBtu/ft².
How has Locke J's energy performance changed over time?
BuildingCensus holds 9 Chicago disclosures for Locke J, covering report years 2015–2023. Its ENERGY STAR score went from 69 in 2015 to 55 in 2023 (-14 points); its best year on file was 2015, at 69. Site EUI moved from 66.8 kBtu/ft² (2015) to 59.7 kBtu/ft² (2023), a 11% decrease. Reported emissions went from 903 tCO₂e to 564 tCO₂e over the same span (down 38%).
What does an ENERGY STAR score of 55 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 55 means the building performs better than about 55% of its national peers. BuildingCensus bands the score into report-card grades; 55 falls in band C — below median (55–69). It sits 20 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. Locke J's 59.7 kBtu/ft² across 108,400 sq ft works out to about 6.5 billion Btu (1,897 MWh-equivalent) in 2023. Its source EUI of 103.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 742,902 kWh of electricity and 39,418 therms of natural gas for the year.
Which law requires Locke J to report its energy use?
Locke J 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:251657:2023). Covered buildings that fail to benchmark and report face fines of up to $100 plus $25 per day of violation under the ordinance.
More K-12 school buildings in Chicago
- Funston· 107,729 sq ft · score 30 (D)
- Coonley· 107,635 sq ft · score 46 (D)
- Depriest· 106,650 sq ft · score 26 (D)
- Gunsaulus· 106,519 sq ft · score 53 (D)
- Kilmer· 106,366 sq ft · score 73 (B)
- Von Linne· 105,920 sq ft · score 45 (D)
- K-12 School buildings in Chicago· 543 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 Locke J's energy grade?
Locke J scores 55 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2023 Chicago disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Locke J use?
Its 2023 site energy-use intensity was 59.7 kBtu/ft² (103.7 kBtu/ft² source) across 108,400 sq ft, including 742,902 kWh of electricity and 39,418 therms of natural gas.
What are Locke J's carbon emissions?
Locke J reported 564 tCO₂e of greenhouse-gas emissions (5.2 kgCO₂e/ft²) for 2023.
Where is Locke J?
Locke J is at 2828 N Oak Park Ave, in Chicago, Illinois 60634. Its coordinates are 41.78040, -87.62184 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is Locke J and when was it built?
Locke J has 108,400 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1927 as its year built. It is classed as K-12 school.
Is Locke J 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, “Locke J, Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/locke-j-63bfc43b (data as of October 2, 2026).