One Hallidie Plaza
Office in California, CA · 25 Cyril Magnin Street, San Francisco · 94102
At a glance
One Hallidie Plaza is a 64,048-square-foot office building at 25 Cyril Magnin Street, San Francisco in San Francisco, California, built in 1976. In its 2021 California benchmarking disclosure it reported an ENERGY STAR score of 64 out of 100 (grade C), a site energy-use intensity of 63.8 kBtu/ft² and 233 tCO₂e of greenhouse-gas emissions. That score is higher than 25% of the 4,912 scored office buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2021
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 64 (band C) |
| Site EUI | 63.8 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 233 tCO₂e |
| GHG intensity | 3.6 kgCO₂e/ft² |
| Electricity | 626,557 kWh |
| Natural gas | 19,470 therms |
| Gross floor area | 64,048 sq ft |
| Source record | california:3089408:2021 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2021latest | 64 | +3 | 63.8 kBtu/ft² | 233 tCO₂e |
| 2020 | 61 | -12 | 67.1 kBtu/ft² | 259 tCO₂e |
| 2019 | 73 | +27 | 47.9 kBtu/ft² | 192 tCO₂e |
| 2018 | 46 | 71.5 kBtu/ft² | 293 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
- 25 Cyril Magnin Street, San Francisco
- City
- California
- State
- California
- ZIP
- 94102
- Coordinates
- 37.78426, -122.40842
Within ~1 km
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See also: most efficient in California · biggest emitters
How does One Hallidie Plaza compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. One Hallidie Plaza's ENERGY STAR score of 64 compares with an average of 75 across the 4,912 that report a score; it scores higher than 25% of them and lower than 75%. Its site EUI of 63.8 kBtu/ft² is about 13% above the average of 56.4 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 3.6 kgCO₂e/ft² is roughly in line with the group average of 3.6 kgCO₂e/ft².
At 64,048 sq ft, it is about 58% below the average floor area of 151,937 sq ft for those buildings. It was built in 1976, 9 years earlier 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 One Hallidie Plaza's energy performance changed over time?
BuildingCensus holds 4 California disclosures for One Hallidie Plaza, covering report years 2018–2021. Its ENERGY STAR score went from 46 in 2018 to 64 in 2021 (+18 points); its best year on file was 2019, at 73. Site EUI moved from 71.5 kBtu/ft² (2018) to 63.8 kBtu/ft² (2021), a 11% decrease. Reported emissions went from 293 tCO₂e to 233 tCO₂e over the same span (down 21%).
What does an ENERGY STAR score of 64 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 64 means the building performs better than about 64% of its national peers. BuildingCensus bands the score into report-card grades; 64 falls in band C — below median (55–69). It sits 11 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. One Hallidie Plaza's 63.8 kBtu/ft² across 64,048 sq ft works out to about 4.1 billion Btu (1,198 MWh-equivalent) in 2021. The disclosure also reports 626,557 kWh of electricity and 19,470 therms of natural gas for the year.
Which law requires One Hallidie Plaza to report its energy use?
One Hallidie Plaza 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 2021 disclosure (source record california:3089408:2021). 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
- 4755 E Philadelphia St· 64,039 sq ft · score 83 (B)
- 6957 N Figueroa St· 64,037 sq ft · score 93 (A)
- 6501 Irvine Center Drive· 64,006 sq ft · score 72 (B)
- 6561 Irvine Center Drive· 64,006 sq ft · score 40 (D)
- 6591 Irvine Center Drive· 64,006 sq ft · score 77 (B)
- 15211 Laguna Canyon Road· 64,006 sq ft · score 77 (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 One Hallidie Plaza's energy grade?
One Hallidie Plaza scores 64 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2021 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does One Hallidie Plaza use?
Its 2021 site energy-use intensity was 63.8 kBtu/ft² across 64,048 sq ft, including 626,557 kWh of electricity and 19,470 therms of natural gas.
What are One Hallidie Plaza's carbon emissions?
One Hallidie Plaza reported 233 tCO₂e of greenhouse-gas emissions (3.6 kgCO₂e/ft²) for 2021.
Where is One Hallidie Plaza?
One Hallidie Plaza is at 25 Cyril Magnin Street, San Francisco, in San Francisco, California 94102. Its coordinates are 37.78426, -122.40842 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is One Hallidie Plaza and when was it built?
One Hallidie Plaza has 64,048 sq ft of gross floor area, as reported in its 2021 disclosure. The disclosure lists 1976 as its year built. It is classed as office.
Is One Hallidie Plaza covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2021 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, “One Hallidie Plaza, San Francisco, California — 2021 benchmarking disclosure”, https://buildingcensus.com/buildings/california/one-hallidie-plaza-50d45b5b (data as of July 9, 2026).