4425 Fortran Dr
Office in California, CA · 4425 Fortran Drive, San Jose · 95134
At a glance
4425 Fortran Dr is a 76,319-square-foot office building at 4425 Fortran Drive, San Jose in San Jose, California, built in 1986. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 100 out of 100 (grade A), a site energy-use intensity of 15.7 kBtu/ft² and 63 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 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 100 (band A) |
| Site EUI | 15.7 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 63 tCO₂e |
| GHG intensity | 0.8 kgCO₂e/ft² |
| Electricity | 137,699 kWh |
| Gross floor area | 76,319 sq ft |
| Source record | california:9639417:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 100 | +1 | 15.7 kBtu/ft² | 63 tCO₂e |
| 2023 | 99 | +2 | 23.5 kBtu/ft² | 110 tCO₂e |
| 2022 | 97 | +2 | 33.7 kBtu/ft² | 149 tCO₂e |
| 2021 | 95 | -5 | 39.5 kBtu/ft² | 164 tCO₂e |
| 2020 | 100 | ±0 | 16.5 kBtu/ft² | 73 tCO₂e |
| 2019 | 100 | 8.1 kBtu/ft² | 43 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
- 4425 Fortran Drive, San Jose
- City
- California
- State
- California
- ZIP
- 95134
- Coordinates
- 37.42213, -121.95816
Within ~1 km
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See also: most efficient in California · biggest emitters
How does 4425 Fortran Dr compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 4425 Fortran Dr'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 15.7 kBtu/ft² is about 72% 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 0.8 kgCO₂e/ft² is about 77% below the group average of 3.6 kgCO₂e/ft².
At 76,319 sq ft, it is about half of the average floor area of 151,937 sq ft for those buildings. Its 1986 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 4425 Fortran Dr's energy performance changed over time?
BuildingCensus holds 6 California disclosures for 4425 Fortran Dr, covering report years 2019–2024. Its ENERGY STAR score was 100 in both 2019 and 2024. Site EUI moved from 8.1 kBtu/ft² (2019) to 15.7 kBtu/ft² (2024), an 94% increase. Reported emissions went from 43 tCO₂e to 63 tCO₂e over the same span (up 46%).
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. 4425 Fortran Dr's 15.7 kBtu/ft² across 76,319 sq ft works out to about 1.2 billion Btu (351 MWh-equivalent) in 2024. The disclosure also reports 137,699 kWh of electricity for the year.
Which law requires 4425 Fortran Dr to report its energy use?
4425 Fortran Dr 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:9639417:2024). 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
- Crossroads Corporate Center Bldg. A· 76,235 sq ft · EUI 24.6 kBtu/ft²
- 1001 Page Mill Rd Bldg One· 76,197 sq ft · score 44 (D)
- Penn Station Studios - 1630 Stewart Street· 76,169 sq ft · score 73 (B)
- Penn Station (Bp)· 76,169 sq ft · score 88 (A)
- Rio Robles Tech Park - 3545· 76,145 sq ft · score 1 (D)
- 3800 Concours· 76,118 sq ft · score 65 (C)
- 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 4425 Fortran Dr's energy grade?
4425 Fortran Dr scores 100 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 4425 Fortran Dr use?
Its 2024 site energy-use intensity was 15.7 kBtu/ft² across 76,319 sq ft, including 137,699 kWh of electricity.
What are 4425 Fortran Dr's carbon emissions?
4425 Fortran Dr reported 63 tCO₂e of greenhouse-gas emissions (0.8 kgCO₂e/ft²) for 2024.
Where is 4425 Fortran Dr?
4425 Fortran Dr is at 4425 Fortran Drive, San Jose, in San Jose, California 95134. Its coordinates are 37.42213, -121.95816 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 4425 Fortran Dr and when was it built?
4425 Fortran Dr has 76,319 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1986 as its year built. It is classed as office.
Is 4425 Fortran Dr 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, “4425 Fortran Dr, San Jose, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/4425-fortran-dr-46784964 (data as of July 9, 2026).