1088 Sansome
Office in California, CA · 1090 Sansome Street, San Francisco · 94111
At a glance
1088 Sansome is a 58,923-square-foot office building at 1090 Sansome Street, San Francisco in San Francisco, California, built in 1908. In its 2023 California benchmarking disclosure it reported an ENERGY STAR score of 81 out of 100 (grade B), a site energy-use intensity of 30.6 kBtu/ft² and 127 tCO₂e of greenhouse-gas emissions. That score is higher than 44% 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 | 81 (band B) |
| Site EUI | 30.6 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 127 tCO₂e |
| GHG intensity | 2.2 kgCO₂e/ft² |
| Electricity | 507,084 kWh |
| Natural gas | 749 therms |
| Gross floor area | 58,923 sq ft |
| Source record | california:15098783:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 81 | -2 | 30.6 kBtu/ft² | 127 tCO₂e |
| 2022 | 83 | 29.5 kBtu/ft² | 118 tCO₂e | |
| 2021 | — | 20.5 kBtu/ft² | 82 tCO₂e | |
| 2020 | — | 22.1 kBtu/ft² | 78 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
- 1090 Sansome Street, San Francisco
- City
- California
- State
- California
- ZIP
- 94111
- Coordinates
- 37.80012, -122.40220
Within ~1 km
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How does 1088 Sansome compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 1088 Sansome's ENERGY STAR score of 81 compares with an average of 75 across the 4,912 that report a score; it scores higher than 44% of them and lower than 54%. Its site EUI of 30.6 kBtu/ft² is about half of 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 2.2 kgCO₂e/ft² is about 39% below the group average of 3.6 kgCO₂e/ft².
At 58,923 sq ft, it is about 61% 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 1088 Sansome's energy performance changed over time?
BuildingCensus holds 4 California disclosures for 1088 Sansome, covering report years 2020–2023. Its ENERGY STAR score went from 83 in 2022 to 81 in 2023 (-2 points); its best year on file was 2022, at 83. Site EUI moved from 22.1 kBtu/ft² (2020) to 30.6 kBtu/ft² (2023), an 38% increase. Reported emissions went from 78 tCO₂e to 127 tCO₂e over the same span (up 62%).
What does an ENERGY STAR score of 81 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 81 means the building performs better than about 81% of its national peers. BuildingCensus bands the score into report-card grades; 81 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. 1088 Sansome's 30.6 kBtu/ft² across 58,923 sq ft works out to about 1.8 billion Btu (528 MWh-equivalent) in 2023. The disclosure also reports 507,084 kWh of electricity and 749 therms of natural gas for the year.
Which law requires 1088 Sansome to report its energy use?
1088 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 2023 disclosure (source record california:15098783:2023). 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.
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- Office buildings in California· 6,214 benchmarked
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- Biggest emitters in California
Frequently asked questions
What is 1088 Sansome's energy grade?
1088 Sansome scores 81 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2023 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 1088 Sansome use?
Its 2023 site energy-use intensity was 30.6 kBtu/ft² across 58,923 sq ft, including 507,084 kWh of electricity and 749 therms of natural gas.
What are 1088 Sansome's carbon emissions?
1088 Sansome reported 127 tCO₂e of greenhouse-gas emissions (2.2 kgCO₂e/ft²) for 2023.
Where is 1088 Sansome?
1088 Sansome is at 1090 Sansome Street, San Francisco, in San Francisco, California 94111. Its coordinates are 37.80012, -122.40220 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 1088 Sansome and when was it built?
1088 Sansome has 58,923 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1908 as its year built. It is classed as office.
Is 1088 Sansome 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, “1088 Sansome, San Francisco, California — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/california/1088-sansome-0d2ac81a (data as of July 9, 2026).