350 Sansome
Office in California, CA · 350 Sansome Street, San Francisco · 94104
At a glance
350 Sansome is a 116,050-square-foot office building at 350 Sansome Street, San Francisco in San Francisco, California, built in 1962. In its 2024 California benchmarking disclosure it reported a site energy-use intensity of 21.2 kBtu/ft² and 163 tCO₂e of greenhouse-gas emissions.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 21.2 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 163 tCO₂e |
| GHG intensity | 1.4 kgCO₂e/ft² |
| Electricity | 719,950 kWh |
| Gross floor area | 116,050 sq ft |
| Source record | california:3068879:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 21.2 kBtu/ft² | 163 tCO₂e | |
| 2023 | — | 21.0 kBtu/ft² | 173 tCO₂e | |
| 2022 | — | 25.1 kBtu/ft² | 200 tCO₂e | |
| 2021 | — | 24.0 kBtu/ft² | 168 tCO₂e | |
| 2020 | — | 48.5 kBtu/ft² | 317 tCO₂e | |
| 2019 | — | 58.3 kBtu/ft² | 419 tCO₂e | |
| 2018 | — | 54.9 kBtu/ft² | 417 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
- 350 Sansome Street, San Francisco
- City
- California
- State
- California
- ZIP
- 94104
- Coordinates
- 37.79381, -122.40102
Within ~1 km
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See also: most efficient in California · biggest emitters
How does 350 Sansome 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 21.2 kBtu/ft² is about 62% 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 116,050 sq ft, it is about 24% below the average floor area of 151,937 sq ft for those buildings. It was built in 1962, 23 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 350 Sansome's energy performance changed over time?
BuildingCensus holds 7 California disclosures for 350 Sansome, covering report years 2018–2024. Site EUI moved from 54.9 kBtu/ft² (2018) to 21.2 kBtu/ft² (2024), a 61% decrease. Reported emissions went from 417 tCO₂e to 163 tCO₂e over the same span (down 61%).
What does a site EUI of 21.2 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. 350 Sansome's 21.2 kBtu/ft² across 116,050 sq ft works out to about 2.5 billion Btu (721 MWh-equivalent) in 2024. The disclosure also reports 719,950 kWh of electricity for the year.
Which law requires 350 Sansome to report its energy use?
350 Sansome 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:3068879:2024). 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
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- 2075 Broadway· 116,000 sq ft · score 87 (A)
- Burlingame Office Park· 116,000 sq ft · score 73 (B)
- 900 Corporate Center· 115,962 sq ft · score 99 (A)
- Fre 127· 115,945 sq ft · score 99 (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 350 Sansome's energy grade?
350 Sansome did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 21.2 kBtu/ft².
How much energy does 350 Sansome use?
Its 2024 site energy-use intensity was 21.2 kBtu/ft² across 116,050 sq ft, including 719,950 kWh of electricity.
What are 350 Sansome's carbon emissions?
350 Sansome reported 163 tCO₂e of greenhouse-gas emissions (1.4 kgCO₂e/ft²) for 2024.
Where is 350 Sansome?
350 Sansome is at 350 Sansome Street, San Francisco, in San Francisco, California 94104. Its coordinates are 37.79381, -122.40102 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 350 Sansome and when was it built?
350 Sansome has 116,050 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1962 as its year built. It is classed as office.
Is 350 Sansome 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, “350 Sansome, San Francisco, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/350-sansome-9ded31e7 (data as of July 9, 2026).