Byer California - 1000 Brannan St.
Office in California, CA · 1000 Brannan St., San Francisco · 94103
At a glance
Byer California - 1000 Brannan St. is a 108,000-square-foot office building at 1000 Brannan St., San Francisco in San Francisco, California, built in 1924. In its 2022 California benchmarking disclosure it reported an ENERGY STAR score of 79 out of 100 (grade B), a site energy-use intensity of 51.3 kBtu/ft² and 336 tCO₂e of greenhouse-gas emissions. That score is higher than 41% of the 4,912 scored office buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2022
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 79 (band B) |
| Site EUI | 51.3 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 336 tCO₂e |
| GHG intensity | 3.1 kgCO₂e/ft² |
| Electricity | 796,884 kWh |
| Natural gas | 28,137 therms |
| Gross floor area | 108,000 sq ft |
| Source record | california:3281538:2022 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2022latest | 79 | -9 | 51.3 kBtu/ft² | 336 tCO₂e |
| 2021 | 88 | +4 | 29.6 kBtu/ft² | 212 tCO₂e |
| 2020 | 84 | +6 | 32.5 kBtu/ft² | 229 tCO₂e |
| 2018 | 78 | 36.7 kBtu/ft² | 266 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
- 1000 Brannan St., San Francisco
- City
- California
- State
- California
- ZIP
- 94103
- Coordinates
- 37.77005, -122.40710
Within ~1 km
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- Hall Of Justicescore 39
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- 855 Brannan - 29928score 98
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See also: most efficient in California · biggest emitters
How does Byer California - 1000 Brannan St. compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. Byer California - 1000 Brannan St.'s ENERGY STAR score of 79 compares with an average of 75 across the 4,912 that report a score; it scores higher than 41% of them and lower than 58%. Its site EUI of 51.3 kBtu/ft² is roughly in line with 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 3.1 kgCO₂e/ft² is about 14% below the group average of 3.6 kgCO₂e/ft².
At 108,000 sq ft, it is about 29% 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 Byer California - 1000 Brannan St.'s energy performance changed over time?
BuildingCensus holds 4 California disclosures for Byer California - 1000 Brannan St., covering report years 2018, 2020, 2021, 2022. Its ENERGY STAR score went from 78 in 2018 to 79 in 2022 (+1 points); its best year on file was 2021, at 88. Site EUI moved from 36.7 kBtu/ft² (2018) to 51.3 kBtu/ft² (2022), an 40% increase. Reported emissions went from 266 tCO₂e to 336 tCO₂e over the same span (up 26%).
What does an ENERGY STAR score of 79 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 79 means the building performs better than about 79% of its national peers. BuildingCensus bands the score into report-card grades; 79 falls in band B — above median (70–84). 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. Byer California - 1000 Brannan St.'s 51.3 kBtu/ft² across 108,000 sq ft works out to about 5.5 billion Btu (1,624 MWh-equivalent) in 2022. The disclosure also reports 796,884 kWh of electricity and 28,137 therms of natural gas for the year.
Which law requires Byer California - 1000 Brannan St. to report its energy use?
Byer California - 1000 Brannan St. 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 2022 disclosure (source record california:3281538:2022). 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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- Z431619 - Sunnyvale Bldg. M- 860· 107,900 sq ft · score 90 (A)
- El Segundo· 107,884 sq ft
- Apollo - 2120 Park Place· 107,874 sq ft · score 89 (A)
- 9821 Business Park Drive· 107,817 sq ft · EUI 41.4 kBtu/ft²
- 950Ironp· 107,817 sq ft · score 93 (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 Byer California - 1000 Brannan St.'s energy grade?
Byer California - 1000 Brannan St. scores 79 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2022 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Byer California - 1000 Brannan St. use?
Its 2022 site energy-use intensity was 51.3 kBtu/ft² across 108,000 sq ft, including 796,884 kWh of electricity and 28,137 therms of natural gas.
What are Byer California - 1000 Brannan St.'s carbon emissions?
Byer California - 1000 Brannan St. reported 336 tCO₂e of greenhouse-gas emissions (3.1 kgCO₂e/ft²) for 2022.
Where is Byer California - 1000 Brannan St.?
Byer California - 1000 Brannan St. is at 1000 Brannan St., San Francisco, in San Francisco, California 94103. Its coordinates are 37.77005, -122.40710 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Byer California - 1000 Brannan St. and when was it built?
Byer California - 1000 Brannan St. has 108,000 sq ft of gross floor area, as reported in its 2022 disclosure. The disclosure lists 1924 as its year built. It is classed as office.
Is Byer California - 1000 Brannan St. covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2022 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, “Byer California - 1000 Brannan St., San Francisco, California — 2022 benchmarking disclosure”, https://buildingcensus.com/buildings/california/byer-california-1000-brannan-st-513ec823 (data as of July 9, 2026).