71428B (UNION SQUARE B)
Commercial in San Francisco, CA · 120 STOCKTON ST · 94108
At a glance
71428B (UNION SQUARE B) is a 248,305-square-foot commercial building at 120 STOCKTON ST in San Francisco, California, built in 1974. In its 2025 San Francisco benchmarking disclosure it reported a site energy-use intensity of 34.2 kBtu/ft² and 483 tCO₂e of greenhouse-gas emissions.
SF Environment Code Chapter 20 · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 34.2 kBtu/ft² |
| Source EUI | 91.0 kBtu/ft² |
| GHG emissions | 483 tCO₂e |
| GHG intensity | 1.9 kgCO₂e/ft² |
| Electricity | 2,291,921 kWh |
| Natural gas | 6,753 therms |
| Gross floor area | 248,305 sq ft |
| Source record | sf:0313/017:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | 34.2 kBtu/ft² | 483 tCO₂e | |
| 2024 | — | 34.1 kBtu/ft² | 546 tCO₂e | |
| 2023 | — | 17.1 kBtu/ft² | 292 tCO₂e | |
| 2022 | — | — | — | |
| 2021 | — | — | — | |
| 2020 | — | — | — | |
| 2019 | — | — | — | |
| 2018 | 82 | ±0 | 33.4 kBtu/ft² | 570 tCO₂e |
| 2017 | 82 | +2 | 40.5 kBtu/ft² | 750 tCO₂e |
| 2016 | 80 | -1 | 41.9 kBtu/ft² | 872 tCO₂e |
| 2015 | 81 | +2 | 40.5 kBtu/ft² | 811 tCO₂e |
| 2014 | 79 | +1 | 41.9 kBtu/ft² | 834 tCO₂e |
| 2013 | 78 | -2 | 46.5 kBtu/ft² | 969 tCO₂e |
| 2012 | 80 | -2 | 44.6 kBtu/ft² | 970 tCO₂e |
| 2011 | 82 | 41.1 kBtu/ft² | 911 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
- 120 STOCKTON ST
- City
- San Francisco
- State
- California
- ZIP
- 94108
- Coordinates
- 37.78698, -122.40595
Within ~1 km
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See also: most efficient in San Francisco · biggest emitters
How does 71428B (UNION SQUARE B) 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. Its site EUI of 34.2 kBtu/ft² is about 30% below the average of 49.2 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 1.9 kgCO₂e/ft² is about 28% below the group average of 2.7 kgCO₂e/ft².
At 248,305 sq ft, it is about 131% above the average floor area of 107,408 sq ft for those buildings. It was built in 1974, 33 years later 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 71428B (UNION SQUARE B)'s energy performance changed over time?
BuildingCensus holds 15 San Francisco disclosures for 71428B (UNION SQUARE B), covering report years 2011–2025. Its ENERGY STAR score was 82 in both 2011 and 2018. Site EUI moved from 41.1 kBtu/ft² (2011) to 34.2 kBtu/ft² (2025), a 17% decrease. Reported emissions went from 911 tCO₂e to 483 tCO₂e over the same span (down 47%).
What does a site EUI of 34.2 kBtu/ft² mean?
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. 71428B (UNION SQUARE B)'s 34.2 kBtu/ft² across 248,305 sq ft works out to about 8.5 billion Btu (2,489 MWh-equivalent) in 2025. Its source EUI of 91.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,291,921 kWh of electricity and 6,753 therms of natural gas for the year.
Which law requires 71428B (UNION SQUARE B) to report its energy use?
71428B (UNION SQUARE B) 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:0313/017:2025). 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
- First Republic Bank Building· 247,000 sq ft · score 93 (A)
- 315 Montgomery Street· 246,955 sq ft · score 79 (B)
- Montgomery Building Inc.· 245,733 sq ft · score 65 (C)
- 33 New Montgomery· 244,804 sq ft · EUI 35.0 kBtu/ft²
- 55 Hawthorne· 244,008 sq ft · score 99 (A)
- 182 Howard St· 243,418 sq ft · score 91 (A)
- Commercial buildings in San Francisco· 1,683 benchmarked
- All San Francisco benchmarked buildings· SF Environment Code Chapter 20
- Most efficient large buildings in San Francisco
- Least efficient large buildings in San Francisco
- Biggest emitters in San Francisco
Frequently asked questions
What is 71428B (UNION SQUARE B)'s energy grade?
71428B (UNION SQUARE B) did not report an ENERGY STAR score in its 2025 disclosure, but its site energy-use intensity was 34.2 kBtu/ft².
How much energy does 71428B (UNION SQUARE B) use?
Its 2025 site energy-use intensity was 34.2 kBtu/ft² (91.0 kBtu/ft² source) across 248,305 sq ft, including 2,291,921 kWh of electricity and 6,753 therms of natural gas.
What are 71428B (UNION SQUARE B)'s carbon emissions?
71428B (UNION SQUARE B) reported 483 tCO₂e of greenhouse-gas emissions (1.9 kgCO₂e/ft²) for 2025.
Where is 71428B (UNION SQUARE B)?
71428B (UNION SQUARE B) is at 120 STOCKTON ST, in San Francisco, California 94108. Its coordinates are 37.78698, -122.40595 (latitude, longitude), as published in the Existing Buildings Energy Performance Ordinance file.
How big is 71428B (UNION SQUARE B) and when was it built?
71428B (UNION SQUARE B) has 248,305 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1974 as its year built. It is classed as commercial.
Is 71428B (UNION SQUARE B) 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, “71428B (UNION SQUARE B), San Francisco, California — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/san-francisco/71428b-union-square-b-e223b440 (data as of October 2, 2026).