550 S Winchester
Office in California, CA · 550 South Winchester Boulevard, San Jose · 95128
At a glance
550 S Winchester is a 103,906-square-foot office building at 550 South Winchester Boulevard, San Jose in San Jose, California, built in 1987. In its 2023 California benchmarking disclosure it reported an ENERGY STAR score of 83 out of 100 (grade B), a site energy-use intensity of 36.9 kBtu/ft² and 263 tCO₂e of greenhouse-gas emissions. That score is higher than 48% 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 | 83 (band B) |
| Site EUI | 36.9 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 263 tCO₂e |
| GHG intensity | 2.5 kgCO₂e/ft² |
| Electricity | 984,001 kWh |
| Natural gas | 4,730 therms |
| Gross floor area | 103,906 sq ft |
| Source record | california:6819527:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 83 | +4 | 36.9 kBtu/ft² | 263 tCO₂e |
| 2022 | 79 | -15 | 46.5 kBtu/ft² | 305 tCO₂e |
| 2021 | 94 | +10 | 25.9 kBtu/ft² | 163 tCO₂e |
| 2020 | 84 | +1 | 32.8 kBtu/ft² | 225 tCO₂e |
| 2019 | 83 | 40.6 kBtu/ft² | 294 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
- 550 South Winchester Boulevard, San Jose
- City
- California
- State
- California
- ZIP
- 95128
- Coordinates
- 37.31787, -121.94949
Within ~1 km
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See also: most efficient in California · biggest emitters
How does 550 S Winchester compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 550 S Winchester's ENERGY STAR score of 83 compares with an average of 75 across the 4,912 that report a score; it scores higher than 48% of them and lower than 50%. Its site EUI of 36.9 kBtu/ft² is about 35% below the average of 56.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 2.5 kgCO₂e/ft² is about 31% below the group average of 3.6 kgCO₂e/ft².
At 103,906 sq ft, it is about 32% below the average floor area of 151,937 sq ft for those buildings. Its 1987 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 550 S Winchester's energy performance changed over time?
BuildingCensus holds 5 California disclosures for 550 S Winchester, covering report years 2019–2023. Its ENERGY STAR score was 83 in both 2019 and 2023. Site EUI moved from 40.6 kBtu/ft² (2019) to 36.9 kBtu/ft² (2023), a 9% decrease. Reported emissions went from 294 tCO₂e to 263 tCO₂e over the same span (down 10%).
What does an ENERGY STAR score of 83 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 83 means the building performs better than about 83% of its national peers. BuildingCensus bands the score into report-card grades; 83 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. 550 S Winchester's 36.9 kBtu/ft² across 103,906 sq ft works out to about 3.8 billion Btu (1,124 MWh-equivalent) in 2023. The disclosure also reports 984,001 kWh of electricity and 4,730 therms of natural gas for the year.
Which law requires 550 S Winchester to report its energy use?
550 S Winchester 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:6819527:2023). 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.
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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 550 S Winchester's energy grade?
550 S Winchester scores 83 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2023 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 550 S Winchester use?
Its 2023 site energy-use intensity was 36.9 kBtu/ft² across 103,906 sq ft, including 984,001 kWh of electricity and 4,730 therms of natural gas.
What are 550 S Winchester's carbon emissions?
550 S Winchester reported 263 tCO₂e of greenhouse-gas emissions (2.5 kgCO₂e/ft²) for 2023.
Where is 550 S Winchester?
550 S Winchester is at 550 South Winchester Boulevard, San Jose, in San Jose, California 95128. Its coordinates are 37.31787, -121.94949 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 550 S Winchester and when was it built?
550 S Winchester has 103,906 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1987 as its year built. It is classed as office.
Is 550 S Winchester 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, “550 S Winchester, San Jose, California — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/california/550-s-winchester-6649f333 (data as of July 9, 2026).