Canyon Oaks At Windermere - Essex (Cn397)
Multifamily Housing in California, CA · 1 Amberstone Lane, San Ramon · 94582
At a glance
Canyon Oaks At Windermere - Essex (Cn397) is a 241,867-square-foot multifamily housing building at 1 Amberstone Lane, San Ramon in San Ramon, California, built in 2005. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 92 out of 100 (grade A), a site energy-use intensity of 33.6 kBtu/ft² and 479 tCO₂e of greenhouse-gas emissions. That score is higher than 51% of the 9,612 scored multifamily housing buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 92 (band A) |
| Site EUI | 33.6 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 479 tCO₂e |
| GHG intensity | 2.0 kgCO₂e/ft² |
| Electricity | 1,065,719 kWh |
| Natural gas | 44,774 therms |
| Gross floor area | 241,867 sq ft |
| Source record | california:23371199:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 92 | +2 | 33.6 kBtu/ft² | 479 tCO₂e |
| 2023 | 90 | +1 | 34.5 kBtu/ft² | 511 tCO₂e |
| 2022 | 89 | 35.0 kBtu/ft² | 519 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
- 1 Amberstone Lane, San Ramon
- City
- California
- State
- California
- ZIP
- 94582
- Coordinates
- 37.76470, -121.90571
Within ~1 km
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See also: most efficient in California · biggest emitters
How does Canyon Oaks At Windermere - Essex (Cn397) compare with other multifamily housing buildings in California?
The latest disclosures cover 10,630 multifamily housing buildings in California, out of 40,029 buildings citywide. Canyon Oaks At Windermere - Essex (Cn397)'s ENERGY STAR score of 92 compares with an average of 82 across the 9,612 that report a score; it scores higher than 51% of them and lower than 47%. Its site EUI of 33.6 kBtu/ft² is roughly in line with the average of 34.4 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 roughly in line with the group average of 2.1 kgCO₂e/ft².
At 241,867 sq ft, it is about 60% above the average floor area of 150,919 sq ft for those buildings. It was built in 2005, 17 years later than the group's average year built (1988). Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².
How has Canyon Oaks At Windermere - Essex (Cn397)'s energy performance changed over time?
BuildingCensus holds 3 California disclosures for Canyon Oaks At Windermere - Essex (Cn397), covering report years 2022–2024. Its ENERGY STAR score went from 89 in 2022 to 92 in 2024 (+3 points). Site EUI moved from 35.0 kBtu/ft² (2022) to 33.6 kBtu/ft² (2024), a 4% decrease. Reported emissions went from 519 tCO₂e to 479 tCO₂e over the same span (down 8%).
What does an ENERGY STAR score of 92 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 92 means the building performs better than about 92% of its national peers. BuildingCensus bands the score into report-card grades; 92 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 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. Canyon Oaks At Windermere - Essex (Cn397)'s 33.6 kBtu/ft² across 241,867 sq ft works out to about 8.1 billion Btu (2,382 MWh-equivalent) in 2024. The disclosure also reports 1,065,719 kWh of electricity and 44,774 therms of natural gas for the year.
Which law requires Canyon Oaks At Windermere - Essex (Cn397) to report its energy use?
Canyon Oaks At Windermere - Essex (Cn397) 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 2024 disclosure (source record california:23371199:2024). 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 multifamily housing buildings in California
- 175-225 S Rio Vista St· 241,730 sq ft · score 98 (A)
- Ca078_Avalon Warner Place (Cw73)· 241,657 sq ft · score 77 (B)
- The Villas At Rowland Heights· 241,595 sq ft · score 68 (C)
- Tuscany Village Luxury Apartments· 241,245 sq ft · score 69 (C)
- 5669 N Fresno St Fresno Ca· 241,133 sq ft · score 100 (A)
- Windwood Glen 01· 241,058 sq ft · EUI 22.3 kBtu/ft²
- Multifamily Housing buildings in California· 10,630 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 Canyon Oaks At Windermere - Essex (Cn397)'s energy grade?
Canyon Oaks At Windermere - Essex (Cn397) scores 92 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Canyon Oaks At Windermere - Essex (Cn397) use?
Its 2024 site energy-use intensity was 33.6 kBtu/ft² across 241,867 sq ft, including 1,065,719 kWh of electricity and 44,774 therms of natural gas.
What are Canyon Oaks At Windermere - Essex (Cn397)'s carbon emissions?
Canyon Oaks At Windermere - Essex (Cn397) reported 479 tCO₂e of greenhouse-gas emissions (2.0 kgCO₂e/ft²) for 2024.
Where is Canyon Oaks At Windermere - Essex (Cn397)?
Canyon Oaks At Windermere - Essex (Cn397) is at 1 Amberstone Lane, San Ramon, in San Ramon, California 94582. Its coordinates are 37.76470, -121.90571 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Canyon Oaks At Windermere - Essex (Cn397) and when was it built?
Canyon Oaks At Windermere - Essex (Cn397) has 241,867 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2005 as its year built. It is classed as multifamily housing.
Is Canyon Oaks At Windermere - Essex (Cn397) covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2024 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, “Canyon Oaks At Windermere - Essex (Cn397), San Ramon, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/canyon-oaks-at-windermere-essex-cn397-8c125552 (data as of July 9, 2026).