Y-181 Fremont
Office in California, CA · 181 Fremont Street, San Francisco · 94105
At a glance
Y-181 Fremont is a 631,042-square-foot office building at 181 Fremont Street, San Francisco in San Francisco, California, built in 2018. In its 2024 California benchmarking disclosure it reported a site energy-use intensity of 30.1 kBtu/ft² and 1,185 tCO₂e of greenhouse-gas emissions.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 30.1 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 1,185 tCO₂e |
| GHG intensity | 1.9 kgCO₂e/ft² |
| Electricity | 4,066,377 kWh |
| Natural gas | 49,830 therms |
| Gross floor area | 631,042 sq ft |
| Source record | california:6600428:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 30.1 kBtu/ft² | 1,185 tCO₂e | |
| 2023 | — | 41.4 kBtu/ft² | 1,683 tCO₂e | |
| 2022 | — | 69.3 kBtu/ft² | 2,811 tCO₂e | |
| 2021 | — | 55.8 kBtu/ft² | 2,036 tCO₂e | |
| 2020 | 77 | +21 | 51.8 kBtu/ft² | 2,221 tCO₂e |
| 2019 | 56 | 77.4 kBtu/ft² | 3,306 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
- 181 Fremont Street, San Francisco
- City
- California
- State
- California
- ZIP
- 94105
- Coordinates
- 37.78961, -122.39546
Within ~1 km
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See also: most efficient in California · biggest emitters
How does Y-181 Fremont compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. Its site EUI of 30.1 kBtu/ft² is about half of the average of 56.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 1.9 kgCO₂e/ft² is about half of the group average of 3.6 kgCO₂e/ft².
At 631,042 sq ft, it is about 315% above the average floor area of 151,937 sq ft for those buildings. It was built in 2018, 33 years later than the group's average year built (1985). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has Y-181 Fremont's energy performance changed over time?
BuildingCensus holds 6 California disclosures for Y-181 Fremont, covering report years 2019–2024. Its ENERGY STAR score went from 56 in 2019 to 77 in 2020 (+21 points). Site EUI moved from 77.4 kBtu/ft² (2019) to 30.1 kBtu/ft² (2024), a 61% decrease. Reported emissions went from 3,306 tCO₂e to 1,185 tCO₂e over the same span (down 64%).
What does a site EUI of 30.1 kBtu/ft² mean?
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. Y-181 Fremont's 30.1 kBtu/ft² across 631,042 sq ft works out to about 19 billion Btu (5,567 MWh-equivalent) in 2024. The disclosure also reports 4,066,377 kWh of electricity and 49,830 therms of natural gas for the year.
Which law requires Y-181 Fremont to report its energy use?
Y-181 Fremont 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:6600428:2024). 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 office buildings in California
- Centerview· 630,762 sq ft · score 89 (A)
- 039 And 045 Office Building 8 And Office Building 9· 628,592 sq ft · score 79 (B)
- Olympic Plaza· 627,899 sq ft · score 100 (A)
- Us-Mtv-40/41/42/43· 627,553 sq ft · EUI 92.6 kBtu/ft²
- Sce - General Office - Bldg 1· 625,897 sq ft · score 69 (C)
- Mpk 21· 625,504 sq ft · score 79 (B)
- Office buildings in California· 6,214 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 Y-181 Fremont's energy grade?
Y-181 Fremont did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 30.1 kBtu/ft².
How much energy does Y-181 Fremont use?
Its 2024 site energy-use intensity was 30.1 kBtu/ft² across 631,042 sq ft, including 4,066,377 kWh of electricity and 49,830 therms of natural gas.
What are Y-181 Fremont's carbon emissions?
Y-181 Fremont reported 1,185 tCO₂e of greenhouse-gas emissions (1.9 kgCO₂e/ft²) for 2024.
Where is Y-181 Fremont?
Y-181 Fremont is at 181 Fremont Street, San Francisco, in San Francisco, California 94105. Its coordinates are 37.78961, -122.39546 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Y-181 Fremont and when was it built?
Y-181 Fremont has 631,042 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2018 as its year built. It is classed as office.
Is Y-181 Fremont 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, “Y-181 Fremont, San Francisco, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/y-181-fremont-0dfb4869 (data as of July 9, 2026).