300 California
Office in California, CA · 300 California Street, San Francisco · 94104
At a glance
300 California is a 144,382-square-foot office building at 300 California Street, San Francisco in San Francisco, California, built in 1946. In its 2023 California benchmarking disclosure it reported an ENERGY STAR score of 98 out of 100 (grade A), a site energy-use intensity of 33.9 kBtu/ft² and 309 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 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 98 (band A) |
| Site EUI | 33.9 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 309 tCO₂e |
| GHG intensity | 2.1 kgCO₂e/ft² |
| Electricity | 831,102 kWh |
| Natural gas | 20,204 therms |
| Gross floor area | 144,382 sq ft |
| Source record | california:6772886:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 98 | +8 | 33.9 kBtu/ft² | 309 tCO₂e |
| 2021 | 90 | +1 | 45.5 kBtu/ft² | 379 tCO₂e |
| 2020 | 89 | +25 | 46.6 kBtu/ft² | 421 tCO₂e |
| 2019 | 64 | -5 | 77.0 kBtu/ft² | 728 tCO₂e |
| 2018 | 69 | 69.9 kBtu/ft² | 662 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
- 300 California Street, San Francisco
- City
- California
- State
- California
- ZIP
- 94104
- Coordinates
- 37.79349, -122.40045
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 300 California compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 300 California'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 33.9 kBtu/ft² is about 40% 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 2.1 kgCO₂e/ft² is about 42% below the group average of 3.6 kgCO₂e/ft².
At 144,382 sq ft, it is roughly in line with the average floor area of 151,937 sq ft for those buildings. It was built in 1946, 39 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 300 California's energy performance changed over time?
BuildingCensus holds 5 California disclosures for 300 California, covering report years 2018, 2019, 2020, 2021, 2023. Its ENERGY STAR score went from 69 in 2018 to 98 in 2023 (+29 points). Site EUI moved from 69.9 kBtu/ft² (2018) to 33.9 kBtu/ft² (2023), a 52% decrease. Reported emissions went from 662 tCO₂e to 309 tCO₂e over the same span (down 53%).
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. 300 California's 33.9 kBtu/ft² across 144,382 sq ft works out to about 4.9 billion Btu (1,434 MWh-equivalent) in 2023. The disclosure also reports 831,102 kWh of electricity and 20,204 therms of natural gas for the year.
Which law requires 300 California to report its energy use?
300 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 2023 disclosure (source record california:6772886:2023). 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
- 500 Circle Seven (Kabc)· 144,372 sq ft · score 13 (D)
- 1102 Q Street· 144,268 sq ft · score 84 (B)
- Wilshire Office Building· 144,123 sq ft · score 75 (B)
- 3130-3150 East Miraloma Avenue· 144,000 sq ft
- Sacramento Jfhq (State Leased) No W No P· 143,851 sq ft · EUI 87.6 kBtu/ft²
- Philips Crossroads Center #1· 143,822 sq ft
- 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 300 California's energy grade?
300 California scores 98 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2023 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 300 California use?
Its 2023 site energy-use intensity was 33.9 kBtu/ft² across 144,382 sq ft, including 831,102 kWh of electricity and 20,204 therms of natural gas.
What are 300 California's carbon emissions?
300 California reported 309 tCO₂e of greenhouse-gas emissions (2.1 kgCO₂e/ft²) for 2023.
Where is 300 California?
300 California is at 300 California Street, San Francisco, in San Francisco, California 94104. Its coordinates are 37.79349, -122.40045 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 300 California and when was it built?
300 California has 144,382 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1946 as its year built. It is classed as office.
Is 300 California 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, “300 California, San Francisco, California — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/california/300-california-499b8e21 (data as of July 9, 2026).