Ontario Mills B
Distribution Center in California, CA · 5200 Ontario Mills Parkway, Ontario · 91764
At a glance
Ontario Mills B is a 109,002-square-foot distribution center at 5200 Ontario Mills Parkway, Ontario in Ontario, California, built in 2006. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 73 out of 100 (grade B), a site energy-use intensity of 5.3 kBtu/ft² and 39 tCO₂e of greenhouse-gas emissions. That score is higher than 43% of the 2,485 scored distribution center buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 73 (band B) |
| Site EUI | 5.3 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 39 tCO₂e |
| GHG intensity | 0.4 kgCO₂e/ft² |
| Electricity | 172,626 kWh |
| Gross floor area | 109,002 sq ft |
| Source record | california:4194736:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 73 | +68 | 5.3 kBtu/ft² | 39 tCO₂e |
| 2022 | 5 | 21.9 kBtu/ft² | 174 tCO₂e |
Compliance context
AB 802 (Public Resources Code §25402.10)
AB 802 requires every California commercial building over 50,000 sq ft to report energy use to the CEC annually; the CEC publicly discloses the results statewide.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 5200 Ontario Mills Parkway, Ontario
- City
- California
- State
- California
- ZIP
- 91764
- Coordinates
- 34.06886, -117.53913
Within ~1 km
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See also: most efficient in California · biggest emitters
How does Ontario Mills B compare with other distribution center buildings in California?
The latest disclosures cover 3,121 distribution center buildings in California, out of 40,029 buildings citywide. Ontario Mills B's ENERGY STAR score of 73 compares with an average of 67 across the 2,485 that report a score; it scores higher than 43% of them and lower than 55%. Its site EUI of 5.3 kBtu/ft² is about 73% below the average of 19.8 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.4 kgCO₂e/ft² is about 72% below the group average of 1.3 kgCO₂e/ft².
At 109,002 sq ft, it is about half of the average floor area of 238,298 sq ft for those buildings. It was built in 2006, 12 years later than the group's average year built (1994). Across all 24 jurisdictions BuildingCensus covers, the 4,082 distribution center buildings average an ENERGY STAR score of 65 and a site EUI of 24.2 kBtu/ft².
How has Ontario Mills B's energy performance changed over time?
BuildingCensus holds 2 California disclosures for Ontario Mills B, covering report years 2022, 2024. Its ENERGY STAR score went from 5 in 2022 to 73 in 2024 (+68 points). Site EUI moved from 21.9 kBtu/ft² (2022) to 5.3 kBtu/ft² (2024), a 76% decrease. Reported emissions went from 174 tCO₂e to 39 tCO₂e over the same span (down 78%).
What does an ENERGY STAR score of 73 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 73 means the building performs better than about 73% of its national peers. BuildingCensus bands the score into report-card grades; 73 falls in band B — above median (70–84). It sits 2 points below 75, the threshold for ENERGY STAR certification. In California, 65% 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. Ontario Mills B's 5.3 kBtu/ft² across 109,002 sq ft works out to about 0.6 billion Btu (169 MWh-equivalent) in 2024. The disclosure also reports 172,626 kWh of electricity for the year.
Which law requires Ontario Mills B to report its energy use?
Ontario Mills B reports under AB 802 (Public Resources Code §25402.10), the legal basis of California's Building Energy Benchmarking Program (statewide), which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2024 disclosure (source record california:4194736:2024). AB 802 requires every California commercial building over 50,000 sq ft to report energy use to the CEC annually; the CEC publicly discloses the results statewide.
More distribution center buildings in California
- 301 Toland Street· 109,000 sq ft
- Taiga Building Products· 109,000 sq ft · score 93 (A)
- Sky Creek· 108,946 sq ft · score 99 (A)
- 836 Cowan Road· 108,900 sq ft
- Idi Brea Lp· 108,640 sq ft · score 90 (A)
- 2777 E Cedar Street· 108,616 sq ft · score 99 (A)
- Distribution Center buildings in California· 3,121 benchmarked
- All California benchmarked buildings· AB 802 (Public Resources Code §25402.10)
- Most efficient large buildings in California
- Least efficient large buildings in California
- Biggest emitters in California
Frequently asked questions
What is Ontario Mills B's energy grade?
Ontario Mills B scores 73 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Ontario Mills B use?
Its 2024 site energy-use intensity was 5.3 kBtu/ft² across 109,002 sq ft, including 172,626 kWh of electricity.
What are Ontario Mills B's carbon emissions?
Ontario Mills B reported 39 tCO₂e of greenhouse-gas emissions (0.4 kgCO₂e/ft²) for 2024.
Where is Ontario Mills B?
Ontario Mills B is at 5200 Ontario Mills Parkway, Ontario, in Ontario, California 91764. Its coordinates are 34.06886, -117.53913 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Ontario Mills B and when was it built?
Ontario Mills B has 109,002 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2006 as its year built. It is classed as distribution center.
Is Ontario Mills B covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2024 Building Energy Benchmarking Program (statewide) disclosure, which lists the buildings reporting under AB 802 (Public Resources Code §25402.10).
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About this data
Source: Building Energy Benchmarking Program (statewide) (AB 802 (Public Resources Code §25402.10)), as published July 9, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “Ontario Mills B, Ontario, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/ontario-mills-b-31c06c72 (data as of July 9, 2026).