Phs | Ca | Corporate Office | Old Building 3300
Office in California, CA · 3300 East Guasti Road, Ontario · 91761
At a glance
Phs | Ca | Corporate Office | Old Building 3300 is a 65,281-square-foot office building at 3300 East Guasti Road, Ontario in Ontario, California, built in 2005. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 62 out of 100 (grade C), a site energy-use intensity of 82.3 kBtu/ft² and 328 tCO₂e of greenhouse-gas emissions. That score is higher than 23% of the 4,912 scored office buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 62 (band C) |
| Site EUI | 82.3 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 328 tCO₂e |
| GHG intensity | 5.0 kgCO₂e/ft² |
| Electricity | 935,696 kWh |
| Natural gas | 21,827 therms |
| Gross floor area | 65,281 sq ft |
| Source record | california:12422105:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 62 | -2 | 82.3 kBtu/ft² | 328 tCO₂e |
| 2023 | 64 | +1 | 81.1 kBtu/ft² | 335 tCO₂e |
| 2022 | 63 | +8 | 79.6 kBtu/ft² | 331 tCO₂e |
| 2019 | 55 | 85.4 kBtu/ft² | 344 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
- 3300 East Guasti Road, Ontario
- City
- California
- State
- California
- ZIP
- 91761
- Coordinates
- 34.06428, -117.57826
Within ~1 km
Nearby benchmarked buildings
- 3655 E. Airport Drivescore 95
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Hotel · 223,000 sq ft
- 3633 Inland Empire Blvd.score 77
Office · 202,067 sq ft
- 3525 E. Airport Drivescore 100
Distribution Center · 201,842 sq ft
- Embassy Suitesscore 95
Hotel · 155,577 sq ft
- 3281 East Guasti Roadscore 88
Mixed Use Property · 149,158 sq ft
See also: most efficient in California · biggest emitters
How does Phs | Ca | Corporate Office | Old Building 3300 compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. Phs | Ca | Corporate Office | Old Building 3300's ENERGY STAR score of 62 compares with an average of 75 across the 4,912 that report a score; it scores higher than 23% of them and lower than 76%. Its site EUI of 82.3 kBtu/ft² is about 46% above the average of 56.4 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 5.0 kgCO₂e/ft² is about 39% above the group average of 3.6 kgCO₂e/ft².
At 65,281 sq ft, it is about 57% below the average floor area of 151,937 sq ft for those buildings. It was built in 2005, 20 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 Phs | Ca | Corporate Office | Old Building 3300's energy performance changed over time?
BuildingCensus holds 4 California disclosures for Phs | Ca | Corporate Office | Old Building 3300, covering report years 2019, 2022, 2023, 2024. Its ENERGY STAR score went from 55 in 2019 to 62 in 2024 (+7 points); its best year on file was 2023, at 64. Site EUI moved from 85.4 kBtu/ft² (2019) to 82.3 kBtu/ft² (2024), a 4% decrease. Reported emissions went from 344 tCO₂e to 328 tCO₂e over the same span (down 5%).
What does an ENERGY STAR score of 62 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 62 means the building performs better than about 62% of its national peers. BuildingCensus bands the score into report-card grades; 62 falls in band C — below median (55–69). It sits 13 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. Phs | Ca | Corporate Office | Old Building 3300's 82.3 kBtu/ft² across 65,281 sq ft works out to about 5.4 billion Btu (1,575 MWh-equivalent) in 2024. The disclosure also reports 935,696 kWh of electricity and 21,827 therms of natural gas for the year.
Which law requires Phs | Ca | Corporate Office | Old Building 3300 to report its energy use?
Phs | Ca | Corporate Office | Old Building 3300 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:12422105:2024). 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 office buildings in California
- Scripps Campus Point A· 65,248 sq ft · score 81 (B)
- 3901 North First Street· 65,188 sq ft · score 83 (B)
- 400 2Nd. Street· 65,150 sq ft · EUI 7.2 kBtu/ft²
- Building B, 9223 Balboa Ave, San Diego· 65,146 sq ft · EUI 39.1 kBtu/ft²
- Building D, 4285 Ponderosa Avenue, San Diego· 65,146 sq ft · score 69 (C)
- Hilltop F· 65,142 sq ft · score 97 (A)
- 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 Phs | Ca | Corporate Office | Old Building 3300's energy grade?
Phs | Ca | Corporate Office | Old Building 3300 scores 62 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Phs | Ca | Corporate Office | Old Building 3300 use?
Its 2024 site energy-use intensity was 82.3 kBtu/ft² across 65,281 sq ft, including 935,696 kWh of electricity and 21,827 therms of natural gas.
What are Phs | Ca | Corporate Office | Old Building 3300's carbon emissions?
Phs | Ca | Corporate Office | Old Building 3300 reported 328 tCO₂e of greenhouse-gas emissions (5.0 kgCO₂e/ft²) for 2024.
Where is Phs | Ca | Corporate Office | Old Building 3300?
Phs | Ca | Corporate Office | Old Building 3300 is at 3300 East Guasti Road, Ontario, in Ontario, California 91761. Its coordinates are 34.06428, -117.57826 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Phs | Ca | Corporate Office | Old Building 3300 and when was it built?
Phs | Ca | Corporate Office | Old Building 3300 has 65,281 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2005 as its year built. It is classed as office.
Is Phs | Ca | Corporate Office | Old Building 3300 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, “Phs | Ca | Corporate Office | Old Building 3300, Ontario, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/phs-ca-corporate-office-old-building-3300-0049e72a (data as of July 9, 2026).