350 MASONIC AV
Commercial in San Francisco, CA · 94118
At a glance
350 MASONIC AV is a 83,000-square-foot commercial building in San Francisco, California, built in 2021. In its 2025 San Francisco benchmarking disclosure it reported an ENERGY STAR score of 56 out of 100 (grade C), a site energy-use intensity of 37.8 kBtu/ft² and 176 tCO₂e of greenhouse-gas emissions. That score is higher than 14% of the 790 scored commercial buildings in San Francisco.
SF Environment Code Chapter 20 · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 56 (band C) |
| Site EUI | 37.8 kBtu/ft² |
| Source EUI | 86.8 kBtu/ft² |
| GHG emissions | 176 tCO₂e |
| GHG intensity | 2.1 kgCO₂e/ft² |
| Electricity | 654,342 kWh |
| Natural gas | 9,084 therms |
| Gross floor area | 83,000 sq ft |
| Source record | sf:1149/046:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 56 | +1 | 37.8 kBtu/ft² | 176 tCO₂e |
| 2024 | 55 | 39.2 kBtu/ft² | 182 tCO₂e | |
| 2023 | — | — | — |
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
- 350 MASONIC AV
- City
- San Francisco
- State
- California
- ZIP
- 94118
- Coordinates
- 37.77804, -122.44622
Within ~1 km
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How does 350 MASONIC AV 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. 350 MASONIC AV's ENERGY STAR score of 56 compares with an average of 78 across the 790 that report a score; it scores higher than 14% of them and lower than 85%. Its site EUI of 37.8 kBtu/ft² is about 23% 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 2.1 kgCO₂e/ft² is about 21% below the group average of 2.7 kgCO₂e/ft².
At 83,000 sq ft, it is about 23% below the average floor area of 107,408 sq ft for those buildings. It was built in 2021, 80 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 350 MASONIC AV's energy performance changed over time?
BuildingCensus holds 3 San Francisco disclosures for 350 MASONIC AV, covering report years 2023–2025. Its ENERGY STAR score went from 55 in 2024 to 56 in 2025 (+1 points). Site EUI moved from 39.2 kBtu/ft² (2024) to 37.8 kBtu/ft² (2025), a 4% decrease. Reported emissions went from 182 tCO₂e to 176 tCO₂e over the same span (down 3%).
What does an ENERGY STAR score of 56 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 56 means the building performs better than about 56% of its national peers. BuildingCensus bands the score into report-card grades; 56 falls in band C — below median (55–69). It sits 19 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. 350 MASONIC AV's 37.8 kBtu/ft² across 83,000 sq ft works out to about 3.1 billion Btu (919 MWh-equivalent) in 2025. Its source EUI of 86.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 654,342 kWh of electricity and 9,084 therms of natural gas for the year.
Which law requires 350 MASONIC AV to report its energy use?
350 MASONIC AV 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:1149/046:2025). 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
- 575 6TH ST· 82,731 sq ft
- PMI - 539 Bryant Street· 82,536 sq ft · score 95 (A)
- Piers 1 1/2, 3 & 5· 82,526 sq ft · EUI 132.1 kBtu/ft²
- 1140 7th St· 82,305 sq ft · EUI 32.6 kBtu/ft²
- 945 BRYANT ST· 81,957 sq ft · score 56 (C)
- 1011 Bryant· 80,901 sq ft · score 23 (D)
- 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 350 MASONIC AV's energy grade?
350 MASONIC AV scores 56 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 350 MASONIC AV use?
Its 2025 site energy-use intensity was 37.8 kBtu/ft² (86.8 kBtu/ft² source) across 83,000 sq ft, including 654,342 kWh of electricity and 9,084 therms of natural gas.
What are 350 MASONIC AV's carbon emissions?
350 MASONIC AV reported 176 tCO₂e of greenhouse-gas emissions (2.1 kgCO₂e/ft²) for 2025.
Where is 350 MASONIC AV?
350 MASONIC AV is in San Francisco, California 94118. Its coordinates are 37.77804, -122.44622 (latitude, longitude), as published in the Existing Buildings Energy Performance Ordinance file.
How big is 350 MASONIC AV and when was it built?
350 MASONIC AV has 83,000 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 2021 as its year built. It is classed as commercial.
Is 350 MASONIC AV 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, “350 MASONIC AV, San Francisco, California — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/san-francisco/350-masonic-av-75b54a13 (data as of October 2, 2026).