401 MASON ST
Commercial in San Francisco, CA · 94102
At a glance
401 MASON ST is a 10,580-square-foot commercial building in San Francisco, California, built in 1916. 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 5.2 kBtu/ft².
No energy data reported for 2025
401 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: 10,580 sq ft · Built 1916
Source record sf:0306/004:2025
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | — | — | |
| 2024 | — | — | — | |
| 2023 | — | 5.2 kBtu/ft² | 4 tCO₂e | |
| 2022 | — | 326.9 kBtu/ft² | 211 tCO₂e | |
| 2021 | — | — | — | |
| 2020 | — | 304.6 kBtu/ft² | 188 tCO₂e | |
| 2019 | — | 375.3 kBtu/ft² | 242 tCO₂e | |
| 2018 | — | 448.7 kBtu/ft² | 289 tCO₂e | |
| 2017 | — | — | — | |
| 2016 | — | — | — | |
| 2015 | — | 435.5 kBtu/ft² | 303 tCO₂e | |
| 2014 | — | 335.0 kBtu/ft² | 235 tCO₂e | |
| 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.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 401 MASON ST
- City
- San Francisco
- State
- California
- ZIP
- 94102
- Coordinates
- 37.78729, -122.41014
Within ~1 km
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See also: most efficient in San Francisco · biggest emitters
How has 401 MASON ST's energy performance changed over time?
BuildingCensus holds 15 San Francisco disclosures for 401 MASON ST, covering report years 2011–2025. Site EUI moved from 335.0 kBtu/ft² (2014) to 5.2 kBtu/ft² (2023), a 98% decrease. Reported emissions went from 235 tCO₂e to 4 tCO₂e over the same span (down 98%).
Which law requires 401 MASON ST to report its energy use?
401 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:0306/004:2025). 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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Frequently asked questions
What is 401 MASON ST's energy grade?
401 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 401 MASON ST?
401 MASON ST is in San Francisco, California 94102. Its coordinates are 37.78729, -122.41014 (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, “401 MASON ST, San Francisco, California — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/san-francisco/401-mason-st-e1c8021b (data as of October 2, 2026).