101 LOMBARD ST / 1425 SANSOME ST
Mixed Residential in San Francisco, CA · 1425 SANSOME ST · 94111
At a glance
101 LOMBARD ST / 1425 SANSOME ST is a 470,714-square-foot mixed residential building in San Francisco, California, built in 1982. In its 2025 San Francisco benchmarking disclosure it reported an ENERGY STAR score of 97 out of 100 (grade A), a site energy-use intensity of 42.4 kBtu/ft² and 628 tCO₂e of greenhouse-gas emissions. That score is higher than 53% of the 340 scored mixed residential buildings in San Francisco.
SF Environment Code Chapter 20 · reporting year 2025
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 97 (band A) |
| Site EUI | 42.4 kBtu/ft² |
| Source EUI | 79.9 kBtu/ft² |
| GHG emissions | 628 tCO₂e |
| GHG intensity | 2.3 kgCO₂e/ft² |
| Electricity | 1,589,798 kWh |
| Natural gas | 59,853 therms |
| Gross floor area | 470,714 sq ft |
| Source record | sf:0080/011:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 97 | -2 | 42.4 kBtu/ft² | 628 tCO₂e |
| 2024 | 99 | ±0 | 38.6 kBtu/ft² | 623 tCO₂e |
| 2023 | 99 | +1 | 39.3 kBtu/ft² | 654 tCO₂e |
| 2022 | 98 | 43.4 kBtu/ft² | 711 tCO₂e | |
| 2021 | — | — | — | |
| 2020 | — | — | — | |
| 2019 | — | — | — | |
| 2018 | — | — | — |
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
- 1425 SANSOME ST
- City
- San Francisco
- State
- California
- ZIP
- 94111
- Coordinates
- 37.80347, -122.40408
Within ~1 km
Nearby benchmarked buildings
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- The Gateway Apartmentsscore —
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- One Maritime Plazascore 75
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- One Maritime Plazascore 72
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- Levi - 1155 Battery Streetscore 81
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See also: most efficient in San Francisco · biggest emitters
How does 101 LOMBARD ST / 1425 SANSOME ST compare with other mixed residential buildings in San Francisco?
The latest disclosures cover 610 mixed residential buildings in San Francisco, out of 2,509 buildings citywide. 101 LOMBARD ST / 1425 SANSOME ST's ENERGY STAR score of 97 compares with an average of 85 across the 340 that report a score; it scores higher than 53% of them and lower than 43%. Its site EUI of 42.4 kBtu/ft² is about 18% above the average of 36.0 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 2.3 kgCO₂e/ft² is about 17% above the group average of 2.0 kgCO₂e/ft².
At 470,714 sq ft, it is about 184% above the average floor area of 165,572 sq ft for those buildings. It was built in 1982, 16 years later than the group's average year built (1967).
How has 101 LOMBARD ST / 1425 SANSOME ST's energy performance changed over time?
BuildingCensus holds 8 San Francisco disclosures for 101 LOMBARD ST / 1425 SANSOME ST, covering report years 2018–2025. Its ENERGY STAR score went from 98 in 2022 to 97 in 2025 (-1 points); its best year on file was 2023, at 99. Site EUI moved from 43.4 kBtu/ft² (2022) to 42.4 kBtu/ft² (2025), a 2% decrease. Reported emissions went from 711 tCO₂e to 628 tCO₂e over the same span (down 12%).
What does an ENERGY STAR score of 97 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 97 means the building performs better than about 97% of its national peers. BuildingCensus bands the score into report-card grades; 97 falls in band A — high performer (85–100). 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 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. 101 LOMBARD ST / 1425 SANSOME ST's 42.4 kBtu/ft² across 470,714 sq ft works out to about 20 billion Btu (5,849 MWh-equivalent) in 2025. Its source EUI of 79.9 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,589,798 kWh of electricity and 59,853 therms of natural gas for the year.
Which law requires 101 LOMBARD ST / 1425 SANSOME ST to report its energy use?
101 LOMBARD ST / 1425 SANSOME ST 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:0080/011:2025). 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 mixed residential buildings in San Francisco
- Freedom West· 465,466 sq ft · score 92 (A)
- Fillmore Center· 460,753 sq ft · score 85 (A)
- 855 FOLSOM ST· 453,109 sq ft · score 100 (A)
- 888 07TH ST· 434,174 sq ft
- 2 TOWNSEND ST· 433,191 sq ft · score 100 (A)
- 1140 HARRISON ST· 432,427 sq ft · score 99 (A)
- Mixed Residential buildings in San Francisco· 610 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 101 LOMBARD ST / 1425 SANSOME ST's energy grade?
101 LOMBARD ST / 1425 SANSOME ST scores 97 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2025 San Francisco disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 101 LOMBARD ST / 1425 SANSOME ST use?
Its 2025 site energy-use intensity was 42.4 kBtu/ft² (79.9 kBtu/ft² source) across 470,714 sq ft, including 1,589,798 kWh of electricity and 59,853 therms of natural gas.
What are 101 LOMBARD ST / 1425 SANSOME ST's carbon emissions?
101 LOMBARD ST / 1425 SANSOME ST reported 628 tCO₂e of greenhouse-gas emissions (2.3 kgCO₂e/ft²) for 2025.
Where is 101 LOMBARD ST / 1425 SANSOME ST?
101 LOMBARD ST / 1425 SANSOME ST is in San Francisco, California 94111. Its coordinates are 37.80347, -122.40408 (latitude, longitude), as published in the Existing Buildings Energy Performance Ordinance file.
How big is 101 LOMBARD ST / 1425 SANSOME ST and when was it built?
101 LOMBARD ST / 1425 SANSOME ST has 470,714 sq ft of gross floor area, as reported in its 2025 disclosure. The disclosure lists 1982 as its year built. It is classed as mixed residential.
Is 101 LOMBARD ST / 1425 SANSOME ST 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, “101 LOMBARD ST / 1425 SANSOME ST, San Francisco, California — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/san-francisco/101-lombard-st-1425-sansome-st-13af9f80 (data as of October 2, 2026).