Williams-Sonoma - Ice House
Office in California, CA · 151 Union Street, San Francisco · 94111
At a glance
Williams-Sonoma - Ice House is a 205,964-square-foot office building at 151 Union Street, San Francisco in San Francisco, California, built in 1908. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 93 out of 100 (grade A), a site energy-use intensity of 39.7 kBtu/ft² and 495 tCO₂e of greenhouse-gas emissions. That score is higher than 72% 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 | 93 (band A) |
| Site EUI | 39.7 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 495 tCO₂e |
| GHG intensity | 2.4 kgCO₂e/ft² |
| Electricity | 1,282,956 kWh |
| Natural gas | 38,587 therms |
| Gross floor area | 205,964 sq ft |
| Source record | california:3206042:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 93 | +2 | 39.7 kBtu/ft² | 495 tCO₂e |
| 2023 | 91 | -3 | 46.4 kBtu/ft² | 588 tCO₂e |
| 2022 | 94 | ±0 | 39.7 kBtu/ft² | 504 tCO₂e |
| 2021 | 94 | +1 | 38.4 kBtu/ft² | 435 tCO₂e |
| 2020 | 93 | +7 | 42.0 kBtu/ft² | 492 tCO₂e |
| 2019 | 86 | +1 | 49.4 kBtu/ft² | 643 tCO₂e |
| 2018 | 85 | 50.1 kBtu/ft² | 652 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
- 151 Union Street, San Francisco
- City
- California
- State
- California
- ZIP
- 94111
- Coordinates
- 37.80078, -122.40239
Within ~1 km
Nearby benchmarked buildings
- One Market Plazascore 79
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- 500 BATTERY STscore —
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- 101 Californiascore 85
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- The Gateway Apartmentsscore —
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- Three Embarcadero Centerscore 95
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See also: most efficient in California · biggest emitters
How does Williams-Sonoma - Ice House compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. Williams-Sonoma - Ice House's ENERGY STAR score of 93 compares with an average of 75 across the 4,912 that report a score; it scores higher than 72% of them and lower than 25%. Its site EUI of 39.7 kBtu/ft² is about 30% 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 2.4 kgCO₂e/ft² is about 33% below the group average of 3.6 kgCO₂e/ft².
At 205,964 sq ft, it is about 36% above 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 Williams-Sonoma - Ice House's energy performance changed over time?
BuildingCensus holds 7 California disclosures for Williams-Sonoma - Ice House, covering report years 2018–2024. Its ENERGY STAR score went from 85 in 2018 to 93 in 2024 (+8 points); its best year on file was 2021, at 94. Site EUI moved from 50.1 kBtu/ft² (2018) to 39.7 kBtu/ft² (2024), a 21% decrease. Reported emissions went from 652 tCO₂e to 495 tCO₂e over the same span (down 24%).
What does an ENERGY STAR score of 93 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 93 means the building performs better than about 93% of its national peers. BuildingCensus bands the score into report-card grades; 93 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. Williams-Sonoma - Ice House's 39.7 kBtu/ft² across 205,964 sq ft works out to about 8.2 billion Btu (2,396 MWh-equivalent) in 2024. The disclosure also reports 1,282,956 kWh of electricity and 38,587 therms of natural gas for the year.
Which law requires Williams-Sonoma - Ice House to report its energy use?
Williams-Sonoma - Ice House 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:3206042:2024). 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
- 300 Montgomery Associates· 205,737 sq ft · score 74 (B)
- Tustin Centre I· 205,570 sq ft · score 89 (A)
- 5161 Lankershim· 205,298 sq ft · score 79 (B)
- Hamm'S Building· 205,293 sq ft · score 97 (A)
- Richmond Office Bldg P· 205,153 sq ft · score 98 (A)
- The Collective· 205,130 sq ft · EUI 50.4 kBtu/ft²
- 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 Williams-Sonoma - Ice House's energy grade?
Williams-Sonoma - Ice House scores 93 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 Williams-Sonoma - Ice House use?
Its 2024 site energy-use intensity was 39.7 kBtu/ft² across 205,964 sq ft, including 1,282,956 kWh of electricity and 38,587 therms of natural gas.
What are Williams-Sonoma - Ice House's carbon emissions?
Williams-Sonoma - Ice House reported 495 tCO₂e of greenhouse-gas emissions (2.4 kgCO₂e/ft²) for 2024.
Where is Williams-Sonoma - Ice House?
Williams-Sonoma - Ice House is at 151 Union Street, San Francisco, in San Francisco, California 94111. Its coordinates are 37.80078, -122.40239 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Williams-Sonoma - Ice House and when was it built?
Williams-Sonoma - Ice House has 205,964 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 Williams-Sonoma - Ice House 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, “Williams-Sonoma - Ice House, San Francisco, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/williams-sonoma-ice-house-80ef2f70 (data as of July 9, 2026).