666 ELLIS ST
Multifamily in San Francisco, CA · 94109
At a glance
666 ELLIS ST is a 63,079-square-foot multifamily building in San Francisco, California, built in 1970. It is listed in the 2025 Existing Buildings Energy Performance Ordinance disclosure without energy figures: no ENERGY STAR score, energy use or emissions were published for it that year. Its most recent reported figures are from 2024, when it scored 37 out of 100 on ENERGY STAR with a site EUI of 86.2 kBtu/ft².
No energy data reported for 2025
666 ELLIS ST appears in the 2025 Existing Buildings Energy Performance Ordinance disclosure, but no ENERGY STAR score, energy use or emissions were published for it — the building did not report benchmarking data for that year. Earlier reported years are in the table below.
Floor area on file: 63,079 sq ft · Built 1970
Source record sf:0321/039:2025
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | — | — | |
| 2024 | 37 | +5 | 86.2 kBtu/ft² | 307 tCO₂e |
| 2023 | 32 | ±0 | 86.9 kBtu/ft² | 319 tCO₂e |
| 2022 | 32 | 86.0 kBtu/ft² | 313 tCO₂e | |
| 2021 | — | 85.3 kBtu/ft² | 298 tCO₂e | |
| 2020 | — | 68.5 kBtu/ft² | 234 tCO₂e | |
| 2019 | — | — | — | |
| 2018 | 7 | 108.3 kBtu/ft² | 389 tCO₂e |
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
- 666 ELLIS ST
- City
- San Francisco
- State
- California
- ZIP
- 94109
- Coordinates
- 37.78459, -122.41724
Within ~1 km
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How has 666 ELLIS ST's energy performance changed over time?
BuildingCensus holds 8 San Francisco disclosures for 666 ELLIS ST, covering report years 2018–2025. Its ENERGY STAR score went from 7 in 2018 to 37 in 2024 (+30 points). Site EUI moved from 108.3 kBtu/ft² (2018) to 86.2 kBtu/ft² (2024), a 20% decrease. Reported emissions went from 389 tCO₂e to 307 tCO₂e over the same span (down 21%).
Which law requires 666 ELLIS ST to report its energy use?
666 ELLIS 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:0321/039:2025). San Francisco's ordinance requires annual benchmarking for commercial buildings over 10,000 sq ft, with administrative penalties for buildings that fail to report.
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Frequently asked questions
What is 666 ELLIS ST's energy grade?
666 ELLIS ST has no grade: it did not report energy data for 2025. The 2025 Existing Buildings Energy Performance Ordinance disclosure lists the building but publishes no ENERGY STAR score, energy use or emissions for it.
Where is 666 ELLIS ST?
666 ELLIS ST is in San Francisco, California 94109. Its coordinates are 37.78459, -122.41724 (latitude, longitude), as published in the Existing Buildings Energy Performance Ordinance file.
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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, “666 ELLIS ST, San Francisco, California — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/san-francisco/666-ellis-st-45672ba3 (data as of October 2, 2026).