O'Connor Health Center 1
Medical Office in California, CA · 455 O'Connor Drive, San Jose · 95128
At a glance
O'Connor Health Center 1 is a 52,000-square-foot medical office at 455 O'Connor Drive, San Jose in San Jose, California, built in 1997. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 75 out of 100 (grade B), a site energy-use intensity of 55.8 kBtu/ft² and 189 tCO₂e of greenhouse-gas emissions. That score is higher than 52% of the 546 scored medical office buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 75 (band B) |
| Site EUI | 55.8 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 189 tCO₂e |
| GHG intensity | 3.6 kgCO₂e/ft² |
| Electricity | 785,337 kWh |
| Gross floor area | 52,000 sq ft |
| Source record | california:12445033:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 75 | +3 | 55.8 kBtu/ft² | 189 tCO₂e |
| 2023 | 72 | -1 | 55.9 kBtu/ft² | 202 tCO₂e |
| 2022 | 73 | -1 | 54.3 kBtu/ft² | 192 tCO₂e |
| 2021 | 74 | +7 | 54.1 kBtu/ft² | 168 tCO₂e |
| 2020 | 67 | +6 | 52.1 kBtu/ft² | 174 tCO₂e |
| 2019 | 61 | 52.1 kBtu/ft² | 177 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
- 455 O'Connor Drive, San Jose
- City
- California
- State
- California
- ZIP
- 95128
- Coordinates
- 37.32661, -121.94029
Within ~1 km
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See also: most efficient in California · biggest emitters
How does O'Connor Health Center 1 compare with other medical office buildings in California?
The latest disclosures cover 602 medical office buildings in California, out of 40,029 buildings citywide. O'Connor Health Center 1's ENERGY STAR score of 75 compares with an average of 63 across the 546 that report a score; it scores higher than 52% of them and lower than 45%. Its site EUI of 55.8 kBtu/ft² is about 41% below the average of 94.3 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 3.6 kgCO₂e/ft² is about 35% below the group average of 5.6 kgCO₂e/ft².
At 52,000 sq ft, it is about half of the average floor area of 100,847 sq ft for those buildings. It was built in 1997, 6 years later than the group's average year built (1991). Across all 24 jurisdictions BuildingCensus covers, the 1,266 medical office buildings average an ENERGY STAR score of 64 and a site EUI of 92.2 kBtu/ft².
How has O'Connor Health Center 1's energy performance changed over time?
BuildingCensus holds 6 California disclosures for O'Connor Health Center 1, covering report years 2019–2024. Its ENERGY STAR score went from 61 in 2019 to 75 in 2024 (+14 points). Site EUI moved from 52.1 kBtu/ft² (2019) to 55.8 kBtu/ft² (2024), an 7% increase. Reported emissions went from 177 tCO₂e to 189 tCO₂e over the same span (up 7%).
What does an ENERGY STAR score of 75 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 75 means the building performs better than about 75% of its national peers. BuildingCensus bands the score into report-card grades; 75 falls in band B — above median (70–84). 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. O'Connor Health Center 1's 55.8 kBtu/ft² across 52,000 sq ft works out to about 2.9 billion Btu (850 MWh-equivalent) in 2024. The disclosure also reports 785,337 kWh of electricity for the year.
Which law requires O'Connor Health Center 1 to report its energy use?
O'Connor Health Center 1 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:12445033:2024). 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 medical office buildings in California
- Assisted Living Building· 51,909 sq ft · score 72 (B)
- Pih Health, Washington Mob· 51,903 sq ft · score 11 (D)
- La Paz Plaza· 51,766 sq ft · EUI 41.1 kBtu/ft²
- Medical Offices South· 51,722 sq ft · score 33 (D)
- Ca1791 - Rancho Cucamonga Medical Offices· 51,675 sq ft · score 28 (D)
- 5000 Sunset· 51,638 sq ft · score 100 (A)
- Medical Office buildings in California· 602 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 O'Connor Health Center 1's energy grade?
O'Connor Health Center 1 scores 75 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 O'Connor Health Center 1 use?
Its 2024 site energy-use intensity was 55.8 kBtu/ft² across 52,000 sq ft, including 785,337 kWh of electricity.
What are O'Connor Health Center 1's carbon emissions?
O'Connor Health Center 1 reported 189 tCO₂e of greenhouse-gas emissions (3.6 kgCO₂e/ft²) for 2024.
Where is O'Connor Health Center 1?
O'Connor Health Center 1 is at 455 O'Connor Drive, San Jose, in San Jose, California 95128. Its coordinates are 37.32661, -121.94029 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is O'Connor Health Center 1 and when was it built?
O'Connor Health Center 1 has 52,000 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1997 as its year built. It is classed as medical office.
Is O'Connor Health Center 1 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, “O'Connor Health Center 1, San Jose, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/o-connor-health-center-1-78d46465 (data as of July 9, 2026).