660 Market Street
Office in California, CA · 660 Market Street, San Francisco · 94104
At a glance
660 Market Street is a 46,258-square-foot office building at 660 Market Street, San Francisco in San Francisco, California, built in 1924. In its 2023 California benchmarking disclosure it reported 130 tCO₂e of greenhouse-gas emissions.
AB 802 (Public Resources Code §25402.10) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | — |
| Source EUI | — |
| GHG emissions | 130 tCO₂e |
| GHG intensity | 2.8 kgCO₂e/ft² |
| Electricity | 367,880 kWh |
| Gross floor area | 46,258 sq ft |
| Source record | california:3989879:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | — | — | 130 tCO₂e | |
| 2021 | 84 | +14 | 34.2 kBtu/ft² | 102 tCO₂e |
| 2020 | 70 | +42 | 47.8 kBtu/ft² | 143 tCO₂e |
| 2019 | 28 | +4 | 87.1 kBtu/ft² | 281 tCO₂e |
| 2018 | 24 | 87.1 kBtu/ft² | 283 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
- 660 Market Street, San Francisco
- City
- California
- State
- California
- ZIP
- 94104
- Coordinates
- 37.78831, -122.40296
Within ~1 km
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See also: most efficient in California · biggest emitters
How does 660 Market Street compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. Its emissions intensity of 2.8 kgCO₂e/ft² is about 22% below the group average of 3.6 kgCO₂e/ft².
At 46,258 sq ft, it is about 70% below the average floor area of 151,937 sq ft for those buildings. It was built in 1924, 61 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 660 Market Street's energy performance changed over time?
BuildingCensus holds 5 California disclosures for 660 Market Street, covering report years 2018, 2019, 2020, 2021, 2023. Its ENERGY STAR score went from 24 in 2018 to 84 in 2021 (+60 points). Site EUI moved from 87.1 kBtu/ft² (2018) to 34.2 kBtu/ft² (2021), a 61% decrease. Reported emissions went from 283 tCO₂e to 130 tCO₂e over the same span (down 54%).
Which law requires 660 Market Street to report its energy use?
660 Market Street 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:3989879:2023). 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
- 4900 South Eastern Avenue· 46,191 sq ft · score 31 (D)
- 5880 W. Las Positas Boulevard· 46,176 sq ft · score 74 (B)
- The Campus - 375 W Trimble Rd· 46,026 sq ft · EUI 25.4 kBtu/ft²
- 945 Bryant Street· 45,913 sq ft
- Mountain View - 381· 45,816 sq ft · EUI 49.6 kBtu/ft²
- 500 Ellinwood Way - Pleasant Hill· 45,795 sq ft · score 81 (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 660 Market Street's energy grade?
660 Market Street did not report an ENERGY STAR score in its 2023 disclosure.
How much energy does 660 Market Street use?
No energy-use intensity was reported for 2023.
What are 660 Market Street's carbon emissions?
660 Market Street reported 130 tCO₂e of greenhouse-gas emissions (2.8 kgCO₂e/ft²) for 2023.
Where is 660 Market Street?
660 Market Street is at 660 Market Street, San Francisco, in San Francisco, California 94104. Its coordinates are 37.78831, -122.40296 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 660 Market Street and when was it built?
660 Market Street has 46,258 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1924 as its year built. It is classed as office.
Is 660 Market Street 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, “660 Market Street, San Francisco, California — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/california/660-market-street-fb1c35a8 (data as of July 9, 2026).