920 De Guigne Dr
Office in California, CA · 920 De Guigne Drive, Sunnyvale · 94085
At a glance
920 De Guigne Dr is a 58,169-square-foot office building at 920 De Guigne Drive, Sunnyvale in Sunnyvale, California, built in 1990. In its 2023 California benchmarking disclosure it reported an ENERGY STAR score of 66 out of 100 (grade C), a site energy-use intensity of 58.2 kBtu/ft² and 223 tCO₂e of greenhouse-gas emissions. That score is higher than 26% 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 | 66 (band C) |
| Site EUI | 58.2 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 223 tCO₂e |
| GHG intensity | 3.8 kgCO₂e/ft² |
| Electricity | 559,488 kWh |
| Natural gas | 16,494 therms |
| Gross floor area | 58,169 sq ft |
| Source record | california:21018187:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 66 | ±0 | 58.2 kBtu/ft² | 223 tCO₂e |
| 2022 | 66 | 42.4 kBtu/ft² | 160 tCO₂e | |
| 2021 | — | 21.5 kBtu/ft² | 76 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
- 920 De Guigne Drive, Sunnyvale
- City
- California
- State
- California
- ZIP
- 94085
- Coordinates
- 37.38568, -122.00551
Within ~1 km
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See also: most efficient in California · biggest emitters
How does 920 De Guigne Dr compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 920 De Guigne Dr's ENERGY STAR score of 66 compares with an average of 75 across the 4,912 that report a score; it scores higher than 26% of them and lower than 73%. Its site EUI of 58.2 kBtu/ft² is roughly in line with the average of 56.4 kBtu/ft². Its emissions intensity of 3.8 kgCO₂e/ft² is roughly in line with the group average of 3.6 kgCO₂e/ft².
At 58,169 sq ft, it is about 62% below the average floor area of 151,937 sq ft for those buildings. It was built in 1990, 5 years later than 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 920 De Guigne Dr's energy performance changed over time?
BuildingCensus holds 3 California disclosures for 920 De Guigne Dr, covering report years 2021–2023. Its ENERGY STAR score was 66 in both 2022 and 2023. Site EUI moved from 21.5 kBtu/ft² (2021) to 58.2 kBtu/ft² (2023), an 171% increase. Reported emissions went from 76 tCO₂e to 223 tCO₂e over the same span (up 192%).
What does an ENERGY STAR score of 66 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 66 means the building performs better than about 66% of its national peers. BuildingCensus bands the score into report-card grades; 66 falls in band C — below median (55–69). It sits 9 points below 75, the threshold for ENERGY STAR certification. 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. 920 De Guigne Dr's 58.2 kBtu/ft² across 58,169 sq ft works out to about 3.4 billion Btu (992 MWh-equivalent) in 2023. The disclosure also reports 559,488 kWh of electricity and 16,494 therms of natural gas for the year.
Which law requires 920 De Guigne Dr to report its energy use?
920 De Guigne 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 2023 disclosure (source record california:21018187:2023). 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.
More office buildings in California
- Northeast C&O: Northeast C&O· 58,144 sq ft · score 100 (A)
- Benecia Macara-990 Benecia· 58,140 sq ft
- Rancho Cordova Building B· 58,133 sq ft · EUI 32.8 kBtu/ft²
- 9121 Oakdale· 58,133 sq ft · score 71 (B)
- Centre Pointe Plaza· 58,107 sq ft · score 99 (A)
- 39115 Trade Center Drive - Palmdale· 58,104 sq ft · score 78 (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 920 De Guigne Dr's energy grade?
920 De Guigne Dr scores 66 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2023 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 920 De Guigne Dr use?
Its 2023 site energy-use intensity was 58.2 kBtu/ft² across 58,169 sq ft, including 559,488 kWh of electricity and 16,494 therms of natural gas.
What are 920 De Guigne Dr's carbon emissions?
920 De Guigne Dr reported 223 tCO₂e of greenhouse-gas emissions (3.8 kgCO₂e/ft²) for 2023.
Where is 920 De Guigne Dr?
920 De Guigne Dr is at 920 De Guigne Drive, Sunnyvale, in Sunnyvale, California 94085. Its coordinates are 37.38568, -122.00551 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 920 De Guigne Dr and when was it built?
920 De Guigne Dr has 58,169 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1990 as its year built. It is classed as office.
Is 920 De Guigne Dr 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, “920 De Guigne Dr, Sunnyvale, California — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/california/920-de-guigne-dr-a037fc07 (data as of July 9, 2026).