34 MASON ST
Commercial in San Francisco, CA · 94102
At a glance
34 MASON ST is a 12,104-square-foot commercial building in San Francisco, California, built in 1907. It is listed in the 2025 Existing Buildings Energy Performance Ordinance disclosure without energy figures: no ENERGY STAR score, energy use or emissions were published for it that year. Its most recent reported figures are from 2023, with a site EUI of 1.2 kBtu/ft².
No energy data reported for 2025
34 MASON ST appears in the 2025 Existing Buildings Energy Performance Ordinance disclosure, but no ENERGY STAR score, energy use or emissions were published for it — the building did not report benchmarking data for that year. Earlier reported years are in the table below.
Floor area on file: 12,104 sq ft · Built 1907
Source record sf:0341/007:2025
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | — | — | |
| 2024 | — | — | — | |
| 2023 | — | 1.2 kBtu/ft² | 1 tCO₂e | |
| 2022 | — | 1.9 kBtu/ft² | 2 tCO₂e | |
| 2021 | — | 1.7 kBtu/ft² | 1 tCO₂e | |
| 2020 | — | — | — | |
| 2019 | — | — | — | |
| 2018 | — | — | — | |
| 2017 | — | — | — | |
| 2016 | — | — | — | |
| 2015 | — | — | — | |
| 2014 | — | — | — | |
| 2013 | — | — | — | |
| 2012 | — | — | — | |
| 2011 | — | — | — |
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
- 34 MASON ST
- City
- San Francisco
- State
- California
- ZIP
- 94102
- Coordinates
- 37.78398, -122.40898
Within ~1 km
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See also: most efficient in San Francisco · biggest emitters
How has 34 MASON ST's energy performance changed over time?
BuildingCensus holds 15 San Francisco disclosures for 34 MASON ST, covering report years 2011–2025. Site EUI moved from 1.7 kBtu/ft² (2021) to 1.2 kBtu/ft² (2023), a 29% decrease. Reported emissions went from 1 tCO₂e to 1 tCO₂e over the same span (down 17%).
Which law requires 34 MASON ST to report its energy use?
34 MASON ST 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:0341/007:2025). 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
- 868 FOLSOM ST· 12,100 sq ft
- The Family Club· 12,092 sq ft · EUI 106.7 kBtu/ft²
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- 2576 Lombard· 12,031 sq ft · EUI 153.0 kBtu/ft²
- 1990 FOLSOM ST· 12,016 sq ft
- 364 BUSH ST· 12,014 sq ft
- 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 34 MASON ST's energy grade?
34 MASON ST has no grade: it did not report energy data for 2025. The 2025 Existing Buildings Energy Performance Ordinance disclosure lists the building but publishes no ENERGY STAR score, energy use or emissions for it.
Where is 34 MASON ST?
34 MASON ST is in San Francisco, California 94102. Its coordinates are 37.78398, -122.40898 (latitude, longitude), as published in the Existing Buildings Energy Performance Ordinance file.
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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, “34 MASON ST, San Francisco, California — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/san-francisco/34-mason-st-09f2faa1 (data as of October 2, 2026).