Z431618 - Sunnyvale Bldg. L-800
Office in California, CA · 800 West California Avenue, Sunnyvale · 94086
At a glance
Z431618 - Sunnyvale Bldg. L-800 is a 60,332-square-foot office building at 800 West California Avenue, Sunnyvale in Sunnyvale, California, built in 2000. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 98 out of 100 (grade A), a site energy-use intensity of 34.6 kBtu/ft² and 122 tCO₂e of greenhouse-gas emissions. That score is higher than 85% 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 | 98 (band A) |
| Site EUI | 34.6 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 122 tCO₂e |
| GHG intensity | 2.0 kgCO₂e/ft² |
| Electricity | 393,276 kWh |
| Natural gas | 6,162 therms |
| Gross floor area | 60,332 sq ft |
| Source record | california:1979389:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 98 | +1 | 34.6 kBtu/ft² | 122 tCO₂e |
| 2023 | 97 | +6 | 38.4 kBtu/ft² | 149 tCO₂e |
| 2022 | 91 | -8 | 49.7 kBtu/ft² | 178 tCO₂e |
| 2021 | 99 | +1 | — | 91 tCO₂e |
| 2020 | 98 | +14 | — | 121 tCO₂e |
| 2018 | 84 | 67.5 kBtu/ft² | 246 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
- 800 West California Avenue, Sunnyvale
- City
- California
- State
- California
- ZIP
- 94086
- Coordinates
- 37.38244, -122.03766
Within ~1 km
Nearby benchmarked buildings
- Flats At Citylinescore —
Multifamily Housing · 289,259 sq ft
- Flats At Cityline (Fl016)score 8
Multifamily Housing · 227,488 sq ft
- 100 Mathilda Placescore 78
Office · 213,405 sq ft
- Briarwood - 29160score 100
Multifamily Housing · 198,646 sq ft
- Catalyst - 684 W Maude Avescore —
Office · 194,624 sq ft
- 684 W Maude Ave, Llcscore —
Office · 194,624 sq ft
See also: most efficient in California · biggest emitters
How does Z431618 - Sunnyvale Bldg. L-800 compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. Z431618 - Sunnyvale Bldg. L-800's ENERGY STAR score of 98 compares with an average of 75 across the 4,912 that report a score; it scores higher than 85% of them and lower than 12%. Its site EUI of 34.6 kBtu/ft² is about 39% 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 2.0 kgCO₂e/ft² is about 44% below the group average of 3.6 kgCO₂e/ft².
At 60,332 sq ft, it is about 60% below the average floor area of 151,937 sq ft for those buildings. It was built in 2000, 15 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 Z431618 - Sunnyvale Bldg. L-800's energy performance changed over time?
BuildingCensus holds 6 California disclosures for Z431618 - Sunnyvale Bldg. L-800, covering report years 2018, 2020, 2021, 2022, 2023, 2024. Its ENERGY STAR score went from 84 in 2018 to 98 in 2024 (+14 points); its best year on file was 2021, at 99. Site EUI moved from 67.5 kBtu/ft² (2018) to 34.6 kBtu/ft² (2024), a 49% decrease. Reported emissions went from 246 tCO₂e to 122 tCO₂e over the same span (down 51%).
What does an ENERGY STAR score of 98 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 98 means the building performs better than about 98% of its national peers. BuildingCensus bands the score into report-card grades; 98 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. Z431618 - Sunnyvale Bldg. L-800's 34.6 kBtu/ft² across 60,332 sq ft works out to about 2.1 billion Btu (612 MWh-equivalent) in 2024. The disclosure also reports 393,276 kWh of electricity and 6,162 therms of natural gas for the year.
Which law requires Z431618 - Sunnyvale Bldg. L-800 to report its energy use?
Z431618 - Sunnyvale Bldg. L-800 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:1979389:2024). 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
- The Granada Buildings· 60,316 sq ft · EUI 1.1 kBtu/ft²
- Sorrento Heights Property Owner, Llc· 60,291 sq ft · EUI 13.6 kBtu/ft²
- Sorrento Heights - 9980 Huennekens· 60,291 sq ft · EUI 11.4 kBtu/ft²
- G14 - 10350 Science Center Dr.· 60,285 sq ft
- Ul Office - 843 Auburn Ct· 60,267 sq ft · EUI 241.7 kBtu/ft²
- Feature Animation· 60,260 sq ft · score 62 (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 Z431618 - Sunnyvale Bldg. L-800's energy grade?
Z431618 - Sunnyvale Bldg. L-800 scores 98 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 Z431618 - Sunnyvale Bldg. L-800 use?
Its 2024 site energy-use intensity was 34.6 kBtu/ft² across 60,332 sq ft, including 393,276 kWh of electricity and 6,162 therms of natural gas.
What are Z431618 - Sunnyvale Bldg. L-800's carbon emissions?
Z431618 - Sunnyvale Bldg. L-800 reported 122 tCO₂e of greenhouse-gas emissions (2.0 kgCO₂e/ft²) for 2024.
Where is Z431618 - Sunnyvale Bldg. L-800?
Z431618 - Sunnyvale Bldg. L-800 is at 800 West California Avenue, Sunnyvale, in Sunnyvale, California 94086. Its coordinates are 37.38244, -122.03766 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Z431618 - Sunnyvale Bldg. L-800 and when was it built?
Z431618 - Sunnyvale Bldg. L-800 has 60,332 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2000 as its year built. It is classed as office.
Is Z431618 - Sunnyvale Bldg. L-800 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).
Working with California building benchmarking records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Z431618 - Sunnyvale Bldg. L-800, Sunnyvale, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/z431618-sunnyvale-bldg-l-800-79a22e47 (data as of July 9, 2026).