20 California St San Francisco Ca
Office in California, CA · 20 California Street, San Francisco · 94111
At a glance
20 California St San Francisco Ca is a 51,137-square-foot office building at 20 California Street, San Francisco in San Francisco, California, built in 1908. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 97 out of 100 (grade A), a site energy-use intensity of 10.7 kBtu/ft² and 36 tCO₂e of greenhouse-gas emissions. That score is higher than 82% 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 | 97 (band A) |
| Site EUI | 10.7 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 36 tCO₂e |
| GHG intensity | 0.7 kgCO₂e/ft² |
| Electricity | 159,831 kWh |
| Gross floor area | 51,137 sq ft |
| Source record | california:10252231:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 97 | 10.7 kBtu/ft² | 36 tCO₂e | |
| 2023 | — | — | 78 tCO₂e | |
| 2022 | 82 | -1 | 21.3 kBtu/ft² | 87 tCO₂e |
| 2021 | 83 | +21 | 24.4 kBtu/ft² | 88 tCO₂e |
| 2020 | 62 | -27 | 42.8 kBtu/ft² | 162 tCO₂e |
| 2019 | 89 | -7 | 30.6 kBtu/ft² | 128 tCO₂e |
| 2018 | 96 | 20.9 kBtu/ft² | 86 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.
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Location
- Address
- 20 California Street, San Francisco
- City
- California
- State
- California
- ZIP
- 94111
- Coordinates
- 37.79392, -122.39693
Within ~1 km
Nearby benchmarked buildings
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- One Market Plazascore 80
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- 555 California Streetscore 76
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- 500 BATTERY STscore —
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See also: most efficient in California · biggest emitters
How does 20 California St San Francisco Ca compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 20 California St San Francisco Ca's ENERGY STAR score of 97 compares with an average of 75 across the 4,912 that report a score; it scores higher than 82% of them and lower than 15%. Its site EUI of 10.7 kBtu/ft² is about 81% 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 0.7 kgCO₂e/ft² is about 80% below the group average of 3.6 kgCO₂e/ft².
At 51,137 sq ft, it is about 66% below the average floor area of 151,937 sq ft for those buildings. It was built in 1908, 77 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 20 California St San Francisco Ca's energy performance changed over time?
BuildingCensus holds 7 California disclosures for 20 California St San Francisco Ca, covering report years 2018–2024. Its ENERGY STAR score went from 96 in 2018 to 97 in 2024 (+1 points). Site EUI moved from 20.9 kBtu/ft² (2018) to 10.7 kBtu/ft² (2024), a 49% decrease. Reported emissions went from 86 tCO₂e to 36 tCO₂e over the same span (down 58%).
What does an ENERGY STAR score of 97 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 97 means the building performs better than about 97% of its national peers. BuildingCensus bands the score into report-card grades; 97 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. 20 California St San Francisco Ca's 10.7 kBtu/ft² across 51,137 sq ft works out to about 0.5 billion Btu (160 MWh-equivalent) in 2024. The disclosure also reports 159,831 kWh of electricity for the year.
Which law requires 20 California St San Francisco Ca to report its energy use?
20 California St San Francisco Ca 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:10252231:2024). 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
- 23101 Lake Center Drive· 51,136 sq ft
- Z056 - Sherman Building· 51,071 sq ft · score 99 (A)
- 9725 Scranton· 51,058 sq ft · score 1 (D)
- Palo Verde Professional Building· 51,049 sq ft · score 96 (A)
- 1470 Civic Court - Ab802· 51,048 sq ft · score 70 (B)
- 1470 Civic Court· 51,048 sq ft · score 97 (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 20 California St San Francisco Ca's energy grade?
20 California St San Francisco Ca scores 97 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 20 California St San Francisco Ca use?
Its 2024 site energy-use intensity was 10.7 kBtu/ft² across 51,137 sq ft, including 159,831 kWh of electricity.
What are 20 California St San Francisco Ca's carbon emissions?
20 California St San Francisco Ca reported 36 tCO₂e of greenhouse-gas emissions (0.7 kgCO₂e/ft²) for 2024.
Where is 20 California St San Francisco Ca?
20 California St San Francisco Ca is at 20 California Street, San Francisco, in San Francisco, California 94111. Its coordinates are 37.79392, -122.39693 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 20 California St San Francisco Ca and when was it built?
20 California St San Francisco Ca has 51,137 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1908 as its year built. It is classed as office.
Is 20 California St San Francisco Ca 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, “20 California St San Francisco Ca, San Francisco, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/20-california-st-san-francisco-ca-3ec0f710 (data as of July 9, 2026).