77 Maiden Lane
Office in California, CA · 77 Maiden Lane, San Francisco · 94108
At a glance
77 Maiden Lane is a 120,334-square-foot office building at 77 Maiden Lane, San Francisco in San Francisco, California, built in 1907. In its 2021 California benchmarking disclosure it reported an ENERGY STAR score of 84 out of 100 (grade B), a site energy-use intensity of 33.0 kBtu/ft² and 235 tCO₂e of greenhouse-gas emissions. That score is higher than 50% 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 | 84 (band B) |
| Site EUI | 33.0 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 235 tCO₂e |
| GHG intensity | 2.0 kgCO₂e/ft² |
| Electricity | 1,012,426 kWh |
| Natural gas | 4,828 therms |
| Gross floor area | 120,334 sq ft |
| Source record | california:6303072:2021 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2021latest | 84 | -3 | 33.0 kBtu/ft² | 235 tCO₂e |
| 2020 | 87 | +5 | 30.7 kBtu/ft² | 241 tCO₂e |
| 2019 | 82 | +9 | 33.9 kBtu/ft² | 284 tCO₂e |
| 2018 | 73 | 37.3 kBtu/ft² | 307 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
- 77 Maiden Lane, San Francisco
- City
- California
- State
- California
- ZIP
- 94108
- Coordinates
- 37.78828, -122.40471
Within ~1 km
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See also: most efficient in California · biggest emitters
How does 77 Maiden Lane compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 77 Maiden Lane's ENERGY STAR score of 84 compares with an average of 75 across the 4,912 that report a score; it scores higher than 50% of them and lower than 48%. Its site EUI of 33.0 kBtu/ft² is about 41% below 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 2.0 kgCO₂e/ft² is about 44% below the group average of 3.6 kgCO₂e/ft².
At 120,334 sq ft, it is about 21% below the average floor area of 151,937 sq ft for those buildings. It was built in 1907, 78 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 77 Maiden Lane's energy performance changed over time?
BuildingCensus holds 4 California disclosures for 77 Maiden Lane, covering report years 2018–2021. Its ENERGY STAR score went from 73 in 2018 to 84 in 2021 (+11 points); its best year on file was 2020, at 87. Site EUI moved from 37.3 kBtu/ft² (2018) to 33.0 kBtu/ft² (2021), a 12% decrease. Reported emissions went from 307 tCO₂e to 235 tCO₂e over the same span (down 24%).
What does an ENERGY STAR score of 84 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 84 means the building performs better than about 84% of its national peers. BuildingCensus bands the score into report-card grades; 84 falls in band B — above median (70–84). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. 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. 77 Maiden Lane's 33.0 kBtu/ft² across 120,334 sq ft works out to about 4 billion Btu (1,164 MWh-equivalent) in 2021. The disclosure also reports 1,012,426 kWh of electricity and 4,828 therms of natural gas for the year.
Which law requires 77 Maiden Lane to report its energy use?
77 Maiden Lane 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:6303072:2021). 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
- Mission Ridge 27101· 120,322 sq ft · score 93 (A)
- Mission Ridge 27201· 120,322 sq ft · score 94 (A)
- 6160 Stoneridge· 120,249 sq ft · score 79 (B)
- Betsy Ross· 120,200 sq ft
- 3130 S Harbor Blvd· 120,139 sq ft · EUI 54.0 kBtu/ft²
- 16 Technology· 120,123 sq ft · score 87 (A)
- 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 77 Maiden Lane's energy grade?
77 Maiden Lane scores 84 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2021 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 77 Maiden Lane use?
Its 2021 site energy-use intensity was 33.0 kBtu/ft² across 120,334 sq ft, including 1,012,426 kWh of electricity and 4,828 therms of natural gas.
What are 77 Maiden Lane's carbon emissions?
77 Maiden Lane reported 235 tCO₂e of greenhouse-gas emissions (2.0 kgCO₂e/ft²) for 2021.
Where is 77 Maiden Lane?
77 Maiden Lane is at 77 Maiden Lane, San Francisco, in San Francisco, California 94108. Its coordinates are 37.78828, -122.40471 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 77 Maiden Lane and when was it built?
77 Maiden Lane has 120,334 sq ft of gross floor area, as reported in its 2021 disclosure. The disclosure lists 1907 as its year built. It is classed as office.
Is 77 Maiden Lane 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, “77 Maiden Lane, San Francisco, California — 2021 benchmarking disclosure”, https://buildingcensus.com/buildings/california/77-maiden-lane-f5beac80 (data as of July 9, 2026).