3939 N First St.
Office in California, CA · 3939 North First Street, San Jose · 95134
At a glance
3939 N First St. is a 64,399-square-foot office building at 3939 North First Street, San Jose in San Jose, California, built in 1984. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 87 out of 100 (grade A), a site energy-use intensity of 21.1 kBtu/ft² and 90 tCO₂e of greenhouse-gas emissions. That score is higher than 56% 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 | 87 (band A) |
| Site EUI | 21.1 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 90 tCO₂e |
| GHG intensity | 1.4 kgCO₂e/ft² |
| Electricity | 398,843 kWh |
| Gross floor area | 64,399 sq ft |
| Source record | california:54964792:2024 |
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
- 3939 North First Street, San Jose
- City
- California
- State
- California
- ZIP
- 95134
- Coordinates
- 37.41246, -121.95175
Within ~1 km
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See also: most efficient in California · biggest emitters
How does 3939 N First St. compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 3939 N First St.'s ENERGY STAR score of 87 compares with an average of 75 across the 4,912 that report a score; it scores higher than 56% of them and lower than 41%. Its site EUI of 21.1 kBtu/ft² is about 63% 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 1.4 kgCO₂e/ft² is about 61% below the group average of 3.6 kgCO₂e/ft².
At 64,399 sq ft, it is about 58% below the average floor area of 151,937 sq ft for those buildings. Its 1984 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.
What does an ENERGY STAR score of 87 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 87 means the building performs better than about 87% of its national peers. BuildingCensus bands the score into report-card grades; 87 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. 3939 N First St.'s 21.1 kBtu/ft² across 64,399 sq ft works out to about 1.4 billion Btu (398 MWh-equivalent) in 2024. The disclosure also reports 398,843 kWh of electricity for the year.
Which law requires 3939 N First St. to report its energy use?
3939 N First St. 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:54964792:2024). 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
- 250 Progress· 64,387 sq ft · score 100 (A)
- Valley Oak Tech Center - 6379 San Ignacio Ave - Northrop Grumman· 64,385 sq ft · score 16 (D)
- 983 University Ave· 64,384 sq ft · score 95 (A)
- 15243 Vanowen· 64,347 sq ft · score 78 (B)
- 3939 North First St - Opi· 64,339 sq ft · EUI 39.7 kBtu/ft²
- 2630 Orchard Parkway· 64,333 sq ft · score 94 (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 3939 N First St.'s energy grade?
3939 N First St. scores 87 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 3939 N First St. use?
Its 2024 site energy-use intensity was 21.1 kBtu/ft² across 64,399 sq ft, including 398,843 kWh of electricity.
What are 3939 N First St.'s carbon emissions?
3939 N First St. reported 90 tCO₂e of greenhouse-gas emissions (1.4 kgCO₂e/ft²) for 2024.
Where is 3939 N First St.?
3939 N First St. is at 3939 North First Street, San Jose, in San Jose, California 95134. Its coordinates are 37.41246, -121.95175 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 3939 N First St. and when was it built?
3939 N First St. has 64,399 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1984 as its year built. It is classed as office.
Is 3939 N First St. 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, “3939 N First St., San Jose, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/3939-n-first-st-01b62fc5 (data as of July 9, 2026).