Ca9591 - Empire Corporate Plaza
Office in California, CA · 10740 Fourth Street, Rancho Cucamonga · 91730
At a glance
Ca9591 - Empire Corporate Plaza is a 41,553-square-foot office building at 10740 Fourth Street, Rancho Cucamonga in Rancho Cucamonga, California, built in 2006. In its 2023 California benchmarking disclosure it reported an ENERGY STAR score of 100 out of 100 (grade A), a site energy-use intensity of 0.3 kBtu/ft² and 1 tCO₂e of greenhouse-gas emissions. That score is higher than 91% of the 4,912 scored office buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 100 (band A) |
| Site EUI | 0.3 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 1 tCO₂e |
| GHG intensity | — |
| Electricity | 3,937 kWh |
| Gross floor area | 41,553 sq ft |
| Source record | california:2551175:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 100 | +22 | 0.3 kBtu/ft² | 1 tCO₂e |
| 2022 | 78 | ±0 | 32.8 kBtu/ft² | 200 tCO₂e |
| 2021 | 78 | +5 | 34.7 kBtu/ft² | 178 tCO₂e |
| 2020 | 73 | +10 | 37.0 kBtu/ft² | 214 tCO₂e |
| 2018 | 63 | 43.3 kBtu/ft² | 261 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.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 10740 Fourth Street, Rancho Cucamonga
- City
- California
- State
- California
- ZIP
- 91730
- Coordinates
- 34.07815, -117.56847
Within ~1 km
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See also: most efficient in California · biggest emitters
How does Ca9591 - Empire Corporate Plaza compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. Ca9591 - Empire Corporate Plaza's ENERGY STAR score of 100 compares with an average of 75 across the 4,912 that report a score; it scores higher than 91% of them. Its site EUI of 0.3 kBtu/ft² is about 99% below the average of 56.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 41,553 sq ft, it is about 73% below the average floor area of 151,937 sq ft for those buildings. It was built in 2006, 21 years later than the group's average year built (1985). 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 Ca9591 - Empire Corporate Plaza's energy performance changed over time?
BuildingCensus holds 5 California disclosures for Ca9591 - Empire Corporate Plaza, covering report years 2018, 2020, 2021, 2022, 2023. Its ENERGY STAR score went from 63 in 2018 to 100 in 2023 (+37 points). Site EUI moved from 43.3 kBtu/ft² (2018) to 0.3 kBtu/ft² (2023), a 99% decrease. Reported emissions went from 261 tCO₂e to 1 tCO₂e over the same span (down 100%).
What does an ENERGY STAR score of 100 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: 100 is the top of the scale. BuildingCensus bands the score into report-card grades; 100 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 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. Ca9591 - Empire Corporate Plaza's 0.3 kBtu/ft² across 41,553 sq ft works out to about 0 billion Btu (4 MWh-equivalent) in 2023. The disclosure also reports 3,937 kWh of electricity for the year.
Which law requires Ca9591 - Empire Corporate Plaza to report its energy use?
Ca9591 - Empire Corporate Plaza 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 2023 disclosure (source record california:2551175:2023). 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 office buildings in California
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- Pac Longshoremen'S Memorial· 40,470 sq ft
- 110 Rose Orchard Way· 40,320 sq ft · score 6 (D)
- Mpk 55· 40,000 sq ft · score 100 (A)
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- Office buildings in California· 6,214 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 Ca9591 - Empire Corporate Plaza's energy grade?
Ca9591 - Empire Corporate Plaza scores 100 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2023 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Ca9591 - Empire Corporate Plaza use?
Its 2023 site energy-use intensity was 0.3 kBtu/ft² across 41,553 sq ft, including 3,937 kWh of electricity.
What are Ca9591 - Empire Corporate Plaza's carbon emissions?
Ca9591 - Empire Corporate Plaza reported 1 tCO₂e of greenhouse-gas emissions for 2023.
Where is Ca9591 - Empire Corporate Plaza?
Ca9591 - Empire Corporate Plaza is at 10740 Fourth Street, Rancho Cucamonga, in Rancho Cucamonga, California 91730. Its coordinates are 34.07815, -117.56847 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Ca9591 - Empire Corporate Plaza and when was it built?
Ca9591 - Empire Corporate Plaza has 41,553 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 2006 as its year built. It is classed as office.
Is Ca9591 - Empire Corporate Plaza covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2023 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, “Ca9591 - Empire Corporate Plaza, Rancho Cucamonga, California — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/california/ca9591-empire-corporate-plaza-4c4840b4 (data as of July 9, 2026).