Mosser Towers
Multifamily Housing in California, CA · 350 Turk Street, San Francisco · 94102
At a glance
Mosser Towers is a 247,100-square-foot multifamily housing building at 350 Turk Street, San Francisco in San Francisco, California, built in 1964. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 52 out of 100 (grade D), a site energy-use intensity of 67.9 kBtu/ft² and 960 tCO₂e of greenhouse-gas emissions. That score is higher than 11% of the 9,612 scored multifamily housing buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 52 (band D) |
| Site EUI | 67.9 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 960 tCO₂e |
| GHG intensity | 3.9 kgCO₂e/ft² |
| Electricity | 1,287,561 kWh |
| Natural gas | 125,944 therms |
| Gross floor area | 247,100 sq ft |
| Source record | california:6827626:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 52 | -25 | 67.9 kBtu/ft² | 960 tCO₂e |
| 2023 | 77 | -20 | 67.1 kBtu/ft² | 910 tCO₂e |
| 2022 | 97 | +55 | 59.5 kBtu/ft² | 789 tCO₂e |
| 2021 | 42 | +16 | 74.3 kBtu/ft² | 1,006 tCO₂e |
| 2020 | 26 | +4 | 82.3 kBtu/ft² | 1,126 tCO₂e |
| 2019 | 22 | 86.5 kBtu/ft² | 1,199 tCO₂e |
Compliance context
AB 802 (Public Resources Code §25402.10)
AB 802 requires every California commercial building over 50,000 sq ft to report energy use to the CEC annually; the CEC publicly discloses the results statewide.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 350 Turk Street, San Francisco
- City
- California
- State
- California
- ZIP
- 94102
- Coordinates
- 37.78283, -122.41490
Within ~1 km
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How does Mosser Towers compare with other multifamily housing buildings in California?
The latest disclosures cover 10,630 multifamily housing buildings in California, out of 40,029 buildings citywide. Mosser Towers's ENERGY STAR score of 52 compares with an average of 82 across the 9,612 that report a score; it scores higher than 11% of them and lower than 89%. Its site EUI of 67.9 kBtu/ft² is about twice the average of 34.4 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 3.9 kgCO₂e/ft² is about 85% above the group average of 2.1 kgCO₂e/ft².
At 247,100 sq ft, it is about 64% above the average floor area of 150,919 sq ft for those buildings. It was built in 1964, 24 years earlier than the group's average year built (1988). Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².
How has Mosser Towers's energy performance changed over time?
BuildingCensus holds 6 California disclosures for Mosser Towers, covering report years 2019–2024. Its ENERGY STAR score went from 22 in 2019 to 52 in 2024 (+30 points); its best year on file was 2022, at 97. Site EUI moved from 86.5 kBtu/ft² (2019) to 67.9 kBtu/ft² (2024), a 22% decrease. Reported emissions went from 1,199 tCO₂e to 960 tCO₂e over the same span (down 20%).
What does an ENERGY STAR score of 52 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 52 means the building performs better than about 52% of its national peers. BuildingCensus bands the score into report-card grades; 52 falls in band D — lowest band (1–54). It sits 23 points below 75, the threshold for ENERGY STAR certification. In California, 65% 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. Mosser Towers's 67.9 kBtu/ft² across 247,100 sq ft works out to about 16.8 billion Btu (4,917 MWh-equivalent) in 2024. The disclosure also reports 1,287,561 kWh of electricity and 125,944 therms of natural gas for the year.
Which law requires Mosser Towers to report its energy use?
Mosser Towers reports under AB 802 (Public Resources Code §25402.10), the legal basis of California's Building Energy Benchmarking Program (statewide), which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2024 disclosure (source record california:6827626:2024). AB 802 requires every California commercial building over 50,000 sq ft to report energy use to the CEC annually; the CEC publicly discloses the results statewide.
More multifamily housing buildings in California
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- Waterford Place, The - Essex (Wt153)· 247,005 sq ft · score 97 (A)
- Park Avenue· 247,000 sq ft · score 68 (C)
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- 600 Wilbur Ave· 246,924 sq ft · score 100 (A)
- Multifamily Housing buildings in California· 10,630 benchmarked
- All California benchmarked buildings· AB 802 (Public Resources Code §25402.10)
- Most efficient large buildings in California
- Least efficient large buildings in California
- Biggest emitters in California
Frequently asked questions
What is Mosser Towers's energy grade?
Mosser Towers scores 52 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Mosser Towers use?
Its 2024 site energy-use intensity was 67.9 kBtu/ft² across 247,100 sq ft, including 1,287,561 kWh of electricity and 125,944 therms of natural gas.
What are Mosser Towers's carbon emissions?
Mosser Towers reported 960 tCO₂e of greenhouse-gas emissions (3.9 kgCO₂e/ft²) for 2024.
Where is Mosser Towers?
Mosser Towers is at 350 Turk Street, San Francisco, in San Francisco, California 94102. Its coordinates are 37.78283, -122.41490 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Mosser Towers and when was it built?
Mosser Towers has 247,100 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1964 as its year built. It is classed as multifamily housing.
Is Mosser Towers covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2024 Building Energy Benchmarking Program (statewide) disclosure, which lists the buildings reporting under AB 802 (Public Resources Code §25402.10).
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About this data
Source: Building Energy Benchmarking Program (statewide) (AB 802 (Public Resources Code §25402.10)), as published July 9, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “Mosser Towers, San Francisco, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/mosser-towers-efa71242 (data as of July 9, 2026).