Williams Sonoma - Ice House 1&2
Commercial in San Francisco, CA · 151 UNION ST · 94111
At a glance
Williams Sonoma - Ice House 1&2 is a 205,964-square-foot commercial building at 151 UNION ST in San Francisco, California, built in 1914. In its 2025 San Francisco benchmarking disclosure it reported an ENERGY STAR score of 87 out of 100 (grade A), a site energy-use intensity of 50.1 kBtu/ft² and 568 tCO₂e of greenhouse-gas emissions. That score is higher than 54% of the 790 scored commercial buildings in San Francisco.
SF Environment Code Chapter 20 · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 87 (band A) |
| Site EUI | 50.1 kBtu/ft² |
| Source EUI | 93.8 kBtu/ft² |
| GHG emissions | 568 tCO₂e |
| GHG intensity | 2.8 kgCO₂e/ft² |
| Electricity | 1,419,476 kWh |
| Natural gas | 54,772 therms |
| Gross floor area | 205,964 sq ft |
| Source record | sf:0112/001:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 87 | -6 | 50.1 kBtu/ft² | 568 tCO₂e |
| 2024 | 93 | +2 | 40.0 kBtu/ft² | 495 tCO₂e |
| 2023 | 91 | -3 | 46.7 kBtu/ft² | 588 tCO₂e |
| 2022 | 94 | 40.0 kBtu/ft² | 504 tCO₂e | |
| 2021 | — | 37.0 kBtu/ft² | 435 tCO₂e | |
| 2020 | — | 39.3 kBtu/ft² | 492 tCO₂e | |
| 2019 | 86 | +1 | 49.0 kBtu/ft² | 643 tCO₂e |
| 2018 | 85 | -7 | 50.2 kBtu/ft² | 652 tCO₂e |
| 2017 | 92 | 49.8 kBtu/ft² | 685 tCO₂e | |
| 2016 | — | 54.0 kBtu/ft² | 797 tCO₂e | |
| 2015 | 95 | 49.6 kBtu/ft² | 732 tCO₂e | |
| 2014 | — | 48.7 kBtu/ft² | 718 tCO₂e | |
| 2013 | 94 | +3 | 52.7 kBtu/ft² | 788 tCO₂e |
| 2012 | 91 | +16 | 56.0 kBtu/ft² | 923 tCO₂e |
| 2011 | 75 | 66.2 kBtu/ft² | 1,097 tCO₂e |
Compliance context
SF Environment Code Chapter 20
San Francisco's ordinance requires annual benchmarking for commercial buildings over 10,000 sq ft, with administrative penalties for buildings that fail to report.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 151 UNION ST
- City
- San Francisco
- State
- California
- ZIP
- 94111
- Coordinates
- 37.80112, -122.40189
Within ~1 km
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See also: most efficient in San Francisco · biggest emitters
How does Williams Sonoma - Ice House 1&2 compare with other commercial buildings in San Francisco?
The latest disclosures cover 1,683 commercial buildings in San Francisco, out of 2,509 buildings citywide. Williams Sonoma - Ice House 1&2's ENERGY STAR score of 87 compares with an average of 78 across the 790 that report a score; it scores higher than 54% of them and lower than 45%. Its site EUI of 50.1 kBtu/ft² is roughly in line with the average of 49.2 kBtu/ft². Its emissions intensity of 2.8 kgCO₂e/ft² is roughly in line with the group average of 2.7 kgCO₂e/ft².
At 205,964 sq ft, it is about twice the average floor area of 107,408 sq ft for those buildings. It was built in 1914, 27 years earlier than the group's average year built (1941). Across all 24 jurisdictions BuildingCensus covers, the 2,307 commercial buildings average an ENERGY STAR score of 76 and a site EUI of 51.3 kBtu/ft².
How has Williams Sonoma - Ice House 1&2's energy performance changed over time?
BuildingCensus holds 15 San Francisco disclosures for Williams Sonoma - Ice House 1&2, covering report years 2011–2025. Its ENERGY STAR score went from 75 in 2011 to 87 in 2025 (+12 points); its best year on file was 2015, at 95. Site EUI moved from 66.2 kBtu/ft² (2011) to 50.1 kBtu/ft² (2025), a 24% decrease. Reported emissions went from 1,097 tCO₂e to 568 tCO₂e over the same span (down 48%).
What does an ENERGY STAR score of 87 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 87 means the building performs better than about 87% of its national peers. BuildingCensus bands the score into report-card grades; 87 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 San Francisco, 73% 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 1&2's 50.1 kBtu/ft² across 205,964 sq ft works out to about 10.3 billion Btu (3,024 MWh-equivalent) in 2025. Its source EUI of 93.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,419,476 kWh of electricity and 54,772 therms of natural gas for the year.
Which law requires Williams Sonoma - Ice House 1&2 to report its energy use?
Williams Sonoma - Ice House 1&2 reports under SF Environment Code Chapter 20, the legal basis of San Francisco's Existing Buildings Energy Performance Ordinance, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2025 disclosure (source record sf:0112/001:2025). San Francisco's ordinance requires annual benchmarking for commercial buildings over 10,000 sq ft, with administrative penalties for buildings that fail to report.
More commercial buildings in San Francisco
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Frequently asked questions
What is Williams Sonoma - Ice House 1&2's energy grade?
Williams Sonoma - Ice House 1&2 scores 87 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2025 San Francisco disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Williams Sonoma - Ice House 1&2 use?
Its 2025 site energy-use intensity was 50.1 kBtu/ft² (93.8 kBtu/ft² source) across 205,964 sq ft, including 1,419,476 kWh of electricity and 54,772 therms of natural gas.
What are Williams Sonoma - Ice House 1&2's carbon emissions?
Williams Sonoma - Ice House 1&2 reported 568 tCO₂e of greenhouse-gas emissions (2.8 kgCO₂e/ft²) for 2025.
Where is Williams Sonoma - Ice House 1&2?
Williams Sonoma - Ice House 1&2 is at 151 UNION ST, in San Francisco, California 94111. Its coordinates are 37.80112, -122.40189 (latitude, longitude), as published in the Existing Buildings Energy Performance Ordinance file.
How big is Williams Sonoma - Ice House 1&2 and when was it built?
Williams Sonoma - Ice House 1&2 has 205,964 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1914 as its year built. It is classed as commercial.
Is Williams Sonoma - Ice House 1&2 covered by SF Environment Code Chapter 20?
Yes — it appears in the 2025 Existing Buildings Energy Performance Ordinance disclosure, which lists the buildings reporting under SF Environment Code Chapter 20.
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About this data
Source: Existing Buildings Energy Performance Ordinance (SF Environment Code Chapter 20), as published October 2, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “Williams Sonoma - Ice House 1&2, San Francisco, California — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/san-francisco/williams-sonoma-ice-house-1-2-fedd10a1 (data as of October 2, 2026).