Onsemi
Office in California, CA · 150 Rose Orchard Way, San Jose · 95134
At a glance
Onsemi is a 92,448-square-foot office building at 150 Rose Orchard Way, San Jose in San Jose, California, built in 1985. In its 2024 California benchmarking disclosure it reported a site energy-use intensity of 79.4 kBtu/ft² and 494 tCO₂e of greenhouse-gas emissions.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 79.4 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 494 tCO₂e |
| GHG intensity | 5.3 kgCO₂e/ft² |
| Electricity | 1,833,422 kWh |
| Gross floor area | 92,448 sq ft |
| Source record | california:27562958:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 79.4 kBtu/ft² | 494 tCO₂e | |
| 2023 | — | 68.9 kBtu/ft² | 430 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
- 150 Rose Orchard Way, San Jose
- City
- California
- State
- California
- ZIP
- 95134
- Coordinates
- 37.41740, -121.94744
Within ~1 km
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See also: most efficient in California · biggest emitters
How does Onsemi compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. Its site EUI of 79.4 kBtu/ft² is about 41% 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 5.3 kgCO₂e/ft² is about 48% above the group average of 3.6 kgCO₂e/ft².
At 92,448 sq ft, it is about 39% below the average floor area of 151,937 sq ft for those buildings. Its 1985 construction date is close to 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 Onsemi's energy performance changed over time?
BuildingCensus holds 2 California disclosures for Onsemi, covering report years 2023–2024. Site EUI moved from 68.9 kBtu/ft² (2023) to 79.4 kBtu/ft² (2024), an 15% increase. Reported emissions went from 430 tCO₂e to 494 tCO₂e over the same span (up 15%).
What does a site EUI of 79.4 kBtu/ft² mean?
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. Onsemi's 79.4 kBtu/ft² across 92,448 sq ft works out to about 7.3 billion Btu (2,151 MWh-equivalent) in 2024. The disclosure also reports 1,833,422 kWh of electricity for the year.
Which law requires Onsemi to report its energy use?
Onsemi 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:27562958:2024). 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
- 5510 Morehouse· 92,405 sq ft · score 70 (B)
- 777 10Th Street· 92,401 sq ft · score 99 (A)
- 360 Post Street· 92,223 sq ft · score 72 (B)
- City View Plaza (B121)· 92,172 sq ft · EUI 14.4 kBtu/ft²
- 8680 Balboa Ave· 92,150 sq ft · score 90 (A)
- 901 Battery· 92,061 sq ft · score 84 (B)
- 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 Onsemi's energy grade?
Onsemi did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 79.4 kBtu/ft².
How much energy does Onsemi use?
Its 2024 site energy-use intensity was 79.4 kBtu/ft² across 92,448 sq ft, including 1,833,422 kWh of electricity.
What are Onsemi's carbon emissions?
Onsemi reported 494 tCO₂e of greenhouse-gas emissions (5.3 kgCO₂e/ft²) for 2024.
Where is Onsemi?
Onsemi is at 150 Rose Orchard Way, San Jose, in San Jose, California 95134. Its coordinates are 37.41740, -121.94744 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Onsemi and when was it built?
Onsemi has 92,448 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1985 as its year built. It is classed as office.
Is Onsemi 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, “Onsemi, San Jose, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/onsemi-e5aaf18a (data as of July 9, 2026).