601-605 W. California
Office in California, CA · 601 West California Avenue, Sunnyvale · 94086
At a glance
601-605 W. California is a 64,972-square-foot office building at 601 West California Avenue, Sunnyvale in Sunnyvale, California, built in 1972. In its 2024 California benchmarking disclosure it reported a site energy-use intensity of 23.6 kBtu/ft² and 102 tCO₂e of greenhouse-gas emissions.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 23.6 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 102 tCO₂e |
| GHG intensity | 1.6 kgCO₂e/ft² |
| Electricity | 448,555 kWh |
| Gross floor area | 64,972 sq ft |
| Source record | california:6284903:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 23.6 kBtu/ft² | 102 tCO₂e | |
| 2023 | — | 37.3 kBtu/ft² | 172 tCO₂e | |
| 2022 | — | — | — | |
| 2021 | — | — | — | |
| 2020 | — | — | — | |
| 2019 | — | — | — | |
| 2018 | — | — | — |
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
- 601 West California Avenue, Sunnyvale
- City
- California
- State
- California
- ZIP
- 94086
- Coordinates
- 37.38316, -122.03537
Within ~1 km
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See also: most efficient in California · biggest emitters
How does 601-605 W. California compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. Its site EUI of 23.6 kBtu/ft² is about 58% 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 1.6 kgCO₂e/ft² is about 57% below the group average of 3.6 kgCO₂e/ft².
At 64,972 sq ft, it is about 57% below the average floor area of 151,937 sq ft for those buildings. It was built in 1972, 13 years earlier 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 601-605 W. California's energy performance changed over time?
BuildingCensus holds 7 California disclosures for 601-605 W. California, covering report years 2018–2024. Site EUI moved from 37.3 kBtu/ft² (2023) to 23.6 kBtu/ft² (2024), a 37% decrease. Reported emissions went from 172 tCO₂e to 102 tCO₂e over the same span (down 41%).
What does a site EUI of 23.6 kBtu/ft² mean?
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. 601-605 W. California's 23.6 kBtu/ft² across 64,972 sq ft works out to about 1.5 billion Btu (449 MWh-equivalent) in 2024. The disclosure also reports 448,555 kWh of electricity for the year.
Which law requires 601-605 W. California to report its energy use?
601-605 W. California 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:6284903:2024). 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
- 5333 Mission Center· 64,965 sq ft · score 100 (A)
- Craft 12626· 64,952 sq ft · EUI 32.4 kBtu/ft²
- Carlsbad Income Partners Llc· 64,948 sq ft · score 78 (B)
- 1265 Corona Pointe Court· 64,947 sq ft · score 80 (B)
- Security Badging / Arcc / Fedex Training Center· 64,947 sq ft · score 33 (D)
- Harbor Gateway Hi-Tech #1· 64,939 sq ft · EUI 64.6 kBtu/ft²
- 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 601-605 W. California's energy grade?
601-605 W. California did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 23.6 kBtu/ft².
How much energy does 601-605 W. California use?
Its 2024 site energy-use intensity was 23.6 kBtu/ft² across 64,972 sq ft, including 448,555 kWh of electricity.
What are 601-605 W. California's carbon emissions?
601-605 W. California reported 102 tCO₂e of greenhouse-gas emissions (1.6 kgCO₂e/ft²) for 2024.
Where is 601-605 W. California?
601-605 W. California is at 601 West California Avenue, Sunnyvale, in Sunnyvale, California 94086. Its coordinates are 37.38316, -122.03537 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 601-605 W. California and when was it built?
601-605 W. California has 64,972 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1972 as its year built. It is classed as office.
Is 601-605 W. California 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, “601-605 W. California, Sunnyvale, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/601-605-w-california-5def96ed (data as of July 9, 2026).