Union Street Plaza
Commercial in San Francisco, CA · 2001 UNION ST · 94123
At a glance
Union Street Plaza is a 84,236-square-foot commercial building at 2001 UNION ST in San Francisco, California, built in 1970. In its 2025 San Francisco benchmarking disclosure it reported an ENERGY STAR score of 74 out of 100 (grade B), a site energy-use intensity of 38.2 kBtu/ft² and 184 tCO₂e of greenhouse-gas emissions. That score is higher than 30% of the 790 scored commercial buildings in San Francisco.
SF Environment Code Chapter 20 · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 74 (band B) |
| Site EUI | 38.2 kBtu/ft² |
| Source EUI | 107.1 kBtu/ft² |
| GHG emissions | 184 tCO₂e |
| GHG intensity | 2.2 kgCO₂e/ft² |
| Electricity | 944,246 kWh |
| Gross floor area | 84,236 sq ft |
| Source record | sf:0541/024:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 74 | +1 | 38.2 kBtu/ft² | 184 tCO₂e |
| 2024 | 73 | ±0 | 42.4 kBtu/ft² | 237 tCO₂e |
| 2023 | 73 | +2 | 43.1 kBtu/ft² | 257 tCO₂e |
| 2022 | 71 | 44.1 kBtu/ft² | 254 tCO₂e | |
| 2021 | — | 42.9 kBtu/ft² | 219 tCO₂e | |
| 2020 | — | 45.0 kBtu/ft² | 251 tCO₂e | |
| 2019 | 59 | 53.5 kBtu/ft² | 299 tCO₂e | |
| 2018 | — | — | — | |
| 2017 | — | — | — | |
| 2016 | — | — | — | |
| 2015 | — | — | — | |
| 2014 | 8 | -13 | 128.2 kBtu/ft² | 577 tCO₂e |
| 2013 | 21 | 105.2 kBtu/ft² | 488 tCO₂e | |
| 2012 | — | — | — | |
| 2011 | 55 | 68.7 kBtu/ft² | 408 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
- 2001 UNION ST
- City
- San Francisco
- State
- California
- ZIP
- 94123
- Coordinates
- 37.79718, -122.43249
Within ~1 km
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See also: most efficient in San Francisco · biggest emitters
How does Union Street Plaza 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. Union Street Plaza's ENERGY STAR score of 74 compares with an average of 78 across the 790 that report a score; it scores higher than 30% of them and lower than 69%. Its site EUI of 38.2 kBtu/ft² is about 22% 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 2.2 kgCO₂e/ft² is about 19% below the group average of 2.7 kgCO₂e/ft².
At 84,236 sq ft, it is about 22% below the average floor area of 107,408 sq ft for those buildings. It was built in 1970, 29 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 Union Street Plaza's energy performance changed over time?
BuildingCensus holds 15 San Francisco disclosures for Union Street Plaza, covering report years 2011–2025. Its ENERGY STAR score went from 55 in 2011 to 74 in 2025 (+19 points). Site EUI moved from 68.7 kBtu/ft² (2011) to 38.2 kBtu/ft² (2025), a 44% decrease. Reported emissions went from 408 tCO₂e to 184 tCO₂e over the same span (down 55%).
What does an ENERGY STAR score of 74 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 74 means the building performs better than about 74% of its national peers. BuildingCensus bands the score into report-card grades; 74 falls in band B — above median (70–84). It sits 1 points below 75, the threshold for ENERGY STAR certification. 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. Union Street Plaza's 38.2 kBtu/ft² across 84,236 sq ft works out to about 3.2 billion Btu (943 MWh-equivalent) in 2025. Its source EUI of 107.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 944,246 kWh of electricity for the year.
Which law requires Union Street Plaza to report its energy use?
Union Street Plaza 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:0541/024:2025). San Francisco's ordinance requires annual benchmarking for commercial buildings over 10,000 sq ft, with administrative penalties for buildings that fail to report.
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- 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
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Frequently asked questions
What is Union Street Plaza's energy grade?
Union Street Plaza scores 74 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2025 San Francisco disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Union Street Plaza use?
Its 2025 site energy-use intensity was 38.2 kBtu/ft² (107.1 kBtu/ft² source) across 84,236 sq ft, including 944,246 kWh of electricity.
What are Union Street Plaza's carbon emissions?
Union Street Plaza reported 184 tCO₂e of greenhouse-gas emissions (2.2 kgCO₂e/ft²) for 2025.
Where is Union Street Plaza?
Union Street Plaza is at 2001 UNION ST, in San Francisco, California 94123. Its coordinates are 37.79718, -122.43249 (latitude, longitude), as published in the Existing Buildings Energy Performance Ordinance file.
How big is Union Street Plaza and when was it built?
Union Street Plaza has 84,236 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1970 as its year built. It is classed as commercial.
Is Union Street Plaza 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, “Union Street Plaza, San Francisco, California — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/san-francisco/union-street-plaza-9bda9855 (data as of October 2, 2026).