Hilton San Francisco Union Square
Commercial in San Francisco, CA · 333 OFARRELL ST · 94102
At a glance
Hilton San Francisco Union Square is a 1,964,250-square-foot commercial building at 333 OFARRELL ST in San Francisco, California, built in 1964. In its 2025 San Francisco benchmarking disclosure it reported an ENERGY STAR score of 69 out of 100 (grade C), a site energy-use intensity of 51.3 kBtu/ft² and 6,135 tCO₂e of greenhouse-gas emissions. That score is higher than 24% of the 790 scored commercial buildings in San Francisco.
SF Environment Code Chapter 20 · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 69 (band C) |
| Site EUI | 51.3 kBtu/ft² |
| Source EUI | 102.3 kBtu/ft² |
| GHG emissions | 6,135 tCO₂e |
| GHG intensity | 3.1 kgCO₂e/ft² |
| Electricity | 14,843,400 kWh |
| Natural gas | 69,191 therms |
| Gross floor area | 1,964,250 sq ft |
| Source record | sf:0325/031:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 69 | 51.3 kBtu/ft² | 6,135 tCO₂e | |
| 2024 | — | — | — | |
| 2023 | 83 | -6 | 56.3 kBtu/ft² | 7,496 tCO₂e |
| 2022 | 89 | 51.2 kBtu/ft² | 6,702 tCO₂e | |
| 2021 | — | 27.7 kBtu/ft² | 3,362 tCO₂e | |
| 2020 | — | 29.1 kBtu/ft² | 3,762 tCO₂e | |
| 2019 | — | — | — | |
| 2018 | 63 | +22 | 73.0 kBtu/ft² | 9,610 tCO₂e |
| 2017 | 41 | -9 | 70.7 kBtu/ft² | 9,660 tCO₂e |
| 2016 | 50 | -1 | 64.5 kBtu/ft² | — |
| 2015 | 51 | +6 | 63.7 kBtu/ft² | — |
| 2014 | 45 | -6 | 68.8 kBtu/ft² | — |
| 2013 | 51 | -8 | 70.7 kBtu/ft² | — |
| 2012 | 59 | +5 | 65.3 kBtu/ft² | — |
| 2011 | 54 | 69.1 kBtu/ft² | — |
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.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 333 OFARRELL ST
- City
- San Francisco
- State
- California
- ZIP
- 94102
- Coordinates
- 37.78564, -122.41041
Within ~1 km
Nearby benchmarked buildings
- 555 Californiascore 75
Commercial · 1,968,807 sq ft
Hotel · 1,964,250 sq ft
Hotel · 1,964,250 sq ft
- 555 California Streetscore 76
Office · 1,810,397 sq ft
Commercial · 1,684,713 sq ft
Hotel · 1,578,964 sq ft
See also: most efficient in San Francisco · biggest emitters
How does Hilton San Francisco Union Square 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. Hilton San Francisco Union Square's ENERGY STAR score of 69 compares with an average of 78 across the 790 that report a score; it scores higher than 24% of them and lower than 75%. Its site EUI of 51.3 kBtu/ft² is roughly in line with the average of 49.2 kBtu/ft². Its emissions intensity of 3.1 kgCO₂e/ft² is about 16% above the group average of 2.7 kgCO₂e/ft².
At 1,964,250 sq ft, it is about 1729% above the average floor area of 107,408 sq ft for those buildings. It was built in 1964, 23 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 Hilton San Francisco Union Square's energy performance changed over time?
BuildingCensus holds 15 San Francisco disclosures for Hilton San Francisco Union Square, covering report years 2011–2025. Its ENERGY STAR score went from 54 in 2011 to 69 in 2025 (+15 points); its best year on file was 2022, at 89. Site EUI moved from 69.1 kBtu/ft² (2011) to 51.3 kBtu/ft² (2025), a 26% decrease. Reported emissions went from 9,660 tCO₂e to 6,135 tCO₂e over the same span (down 36%).
What does an ENERGY STAR score of 69 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 69 means the building performs better than about 69% of its national peers. BuildingCensus bands the score into report-card grades; 69 falls in band C — below median (55–69). It sits 6 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. Hilton San Francisco Union Square's 51.3 kBtu/ft² across 1,964,250 sq ft works out to about 100.8 billion Btu (29,532 MWh-equivalent) in 2025. Its source EUI of 102.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 14,843,400 kWh of electricity and 69,191 therms of natural gas for the year.
Which law requires Hilton San Francisco Union Square to report its energy use?
Hilton San Francisco Union Square 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:0325/031:2025). 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
- PGE-GO Complex· 1,948,626 sq ft
- One Market Plaza· 1,870,178 sq ft · score 80 (B)
- 337F2-San Francisco Moscone Marriott· 1,684,713 sq ft
- Salesforce Tower· 1,679,267 sq ft · score 95 (A)
- Chase Center Arena· 1,546,115 sq ft · EUI 116.0 kBtu/ft²
- 101 California· 1,464,955 sq ft · score 85 (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 Hilton San Francisco Union Square's energy grade?
Hilton San Francisco Union Square scores 69 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2025 San Francisco disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Hilton San Francisco Union Square use?
Its 2025 site energy-use intensity was 51.3 kBtu/ft² (102.3 kBtu/ft² source) across 1,964,250 sq ft, including 14,843,400 kWh of electricity and 69,191 therms of natural gas.
What are Hilton San Francisco Union Square's carbon emissions?
Hilton San Francisco Union Square reported 6,135 tCO₂e of greenhouse-gas emissions (3.1 kgCO₂e/ft²) for 2025.
Where is Hilton San Francisco Union Square?
Hilton San Francisco Union Square is at 333 OFARRELL ST, in San Francisco, California 94102. Its coordinates are 37.78564, -122.41041 (latitude, longitude), as published in the Existing Buildings Energy Performance Ordinance file.
How big is Hilton San Francisco Union Square and when was it built?
Hilton San Francisco Union Square has 1,964,250 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1964 as its year built. It is classed as commercial.
Is Hilton San Francisco Union Square 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.
Working with San Francisco building benchmarking records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Hilton San Francisco Union Square, San Francisco, California — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/san-francisco/hilton-san-francisco-union-square-d28f993a (data as of October 2, 2026).