Lone Mountain East 1
Mixed Residential in San Francisco, CA · 2500 Turk Blvd · 94118
At a glance
Lone Mountain East 1 is a 110,760-square-foot mixed residential building at 2500 Turk Blvd in San Francisco, California. 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 22.0 kBtu/ft² and 92 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 | 22.0 kBtu/ft² |
| Source EUI | 61.7 kBtu/ft² |
| GHG emissions | 92 tCO₂e |
| GHG intensity | 1.3 kgCO₂e/ft² |
| Electricity | 473,271 kWh |
| Gross floor area | 110,760 sq ft |
| Source record | sf:1107/008-B:2025 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | 97 | +2 | 22.0 kBtu/ft² | 92 tCO₂e |
| 2024 | 95 | +1 | 22.8 kBtu/ft² | 111 tCO₂e |
| 2023 | 94 | 22.9 kBtu/ft² | 119 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
- 2500 Turk Blvd
- City
- San Francisco
- State
- California
- ZIP
- 94118
- Coordinates
- 37.77910, -122.45145
Within ~1 km
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See also: most efficient in San Francisco · biggest emitters
How does Lone Mountain East 1 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. Lone Mountain East 1'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 22.0 kBtu/ft² is about 39% below the average of 36.0 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 1.3 kgCO₂e/ft² is about 37% below the group average of 2.0 kgCO₂e/ft².
At 110,760 sq ft, it is about 33% below the average floor area of 165,572 sq ft for those buildings.
How has Lone Mountain East 1's energy performance changed over time?
BuildingCensus holds 3 San Francisco disclosures for Lone Mountain East 1, covering report years 2023–2025. Its ENERGY STAR score went from 94 in 2023 to 97 in 2025 (+3 points). Site EUI moved from 22.9 kBtu/ft² (2023) to 22.0 kBtu/ft² (2025), a 4% decrease. Reported emissions went from 119 tCO₂e to 92 tCO₂e over the same span (down 23%).
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. Lone Mountain East 1's 22.0 kBtu/ft² across 110,760 sq ft works out to about 2.4 billion Btu (714 MWh-equivalent) in 2025. Its source EUI of 61.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 473,271 kWh of electricity for the year.
Which law requires Lone Mountain East 1 to report its energy use?
Lone Mountain East 1 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:1107/008-B: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
- 45 CLEARY CT· 110,000 sq ft
- YWCA APARTMENTS· 110,000 sq ft · score 93 (A)
- 1401 MISSION ST· 109,817 sq ft · score 53 (D)
- Reardon Heights· 109,584 sq ft
- 1150 LOMBARD ST· 109,584 sq ft · score 99 (A)
- 2030 VALLEJO ST· 108,950 sq ft
- 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 Lone Mountain East 1's energy grade?
Lone Mountain East 1 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 Lone Mountain East 1 use?
Its 2025 site energy-use intensity was 22.0 kBtu/ft² (61.7 kBtu/ft² source) across 110,760 sq ft, including 473,271 kWh of electricity.
What are Lone Mountain East 1's carbon emissions?
Lone Mountain East 1 reported 92 tCO₂e of greenhouse-gas emissions (1.3 kgCO₂e/ft²) for 2025.
Where is Lone Mountain East 1?
Lone Mountain East 1 is at 2500 Turk Blvd, in San Francisco, California 94118. Its coordinates are 37.77910, -122.45145 (latitude, longitude), as published in the Existing Buildings Energy Performance Ordinance file.
How big is Lone Mountain East 1 and when was it built?
Lone Mountain East 1 has 110,760 sq ft of gross floor area, as reported in its 2025 disclosure. It is classed as mixed residential.
Is Lone Mountain East 1 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, “Lone Mountain East 1, San Francisco, California — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/san-francisco/lone-mountain-east-1-7b31084d (data as of October 2, 2026).