Willow Lake (Wl310) Elm St
Multifamily Housing in California, CA · 1331 Lakeshore Circle, San Jose · 95131
At a glance
Willow Lake (Wl310) Elm St is a 81,772-square-foot multifamily housing building at 1331 Lakeshore Circle, San Jose in San Jose, California, built in 1989. In its 2023 California benchmarking disclosure it reported an ENERGY STAR score of 100 out of 100 (grade A), a site energy-use intensity of 3.4 kBtu/ft² and 18 tCO₂e of greenhouse-gas emissions. That score is higher than 76% of the 9,612 scored multifamily housing buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 100 (band A) |
| Site EUI | 3.4 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 18 tCO₂e |
| GHG intensity | 0.2 kgCO₂e/ft² |
| Electricity | 41,307 kWh |
| Natural gas | 1,464 therms |
| Gross floor area | 81,772 sq ft |
| Source record | california:27915382:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 100 | +2 | 3.4 kBtu/ft² | 18 tCO₂e |
| 2022 | 98 | 13.5 kBtu/ft² | 73 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
- 1331 Lakeshore Circle, San Jose
- City
- California
- State
- California
- ZIP
- 95131
- Coordinates
- 37.38451, -121.89306
Within ~1 km
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See also: most efficient in California · biggest emitters
How does Willow Lake (Wl310) Elm St 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. Willow Lake (Wl310) Elm St's ENERGY STAR score of 100 compares with an average of 82 across the 9,612 that report a score; it scores higher than 76% of them. Its site EUI of 3.4 kBtu/ft² is about 90% below 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 0.2 kgCO₂e/ft² is about 90% below the group average of 2.1 kgCO₂e/ft².
At 81,772 sq ft, it is about half of the average floor area of 150,919 sq ft for those buildings. Its 1989 construction date is close to 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 Willow Lake (Wl310) Elm St's energy performance changed over time?
BuildingCensus holds 2 California disclosures for Willow Lake (Wl310) Elm St, covering report years 2022–2023. Its ENERGY STAR score went from 98 in 2022 to 100 in 2023 (+2 points). Site EUI moved from 13.5 kBtu/ft² (2022) to 3.4 kBtu/ft² (2023), a 75% decrease. Reported emissions went from 73 tCO₂e to 18 tCO₂e over the same span (down 76%).
What does an ENERGY STAR score of 100 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: 100 is the top of the scale. BuildingCensus bands the score into report-card grades; 100 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. Willow Lake (Wl310) Elm St's 3.4 kBtu/ft² across 81,772 sq ft works out to about 0.3 billion Btu (81 MWh-equivalent) in 2023. The disclosure also reports 41,307 kWh of electricity and 1,464 therms of natural gas for the year.
Which law requires Willow Lake (Wl310) Elm St to report its energy use?
Willow Lake (Wl310) Elm St 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 2023 disclosure (source record california:27915382:2023). 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
- Garden Hill· 81,767 sq ft · score 100 (A)
- 810 N Loara St - Sage Park· 81,720 sq ft · score 1 (D)
- 810 N Loara St· 81,720 sq ft · score 100 (A)
- Oceana Apartment Homes· 81,700 sq ft · score 100 (A)
- Garden East Apartments Llc· 81,696 sq ft · score 100 (A)
- Tierra Del Sol· 81,684 sq ft · score 100 (A)
- 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 Willow Lake (Wl310) Elm St's energy grade?
Willow Lake (Wl310) Elm St scores 100 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2023 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Willow Lake (Wl310) Elm St use?
Its 2023 site energy-use intensity was 3.4 kBtu/ft² across 81,772 sq ft, including 41,307 kWh of electricity and 1,464 therms of natural gas.
What are Willow Lake (Wl310) Elm St's carbon emissions?
Willow Lake (Wl310) Elm St reported 18 tCO₂e of greenhouse-gas emissions (0.2 kgCO₂e/ft²) for 2023.
Where is Willow Lake (Wl310) Elm St?
Willow Lake (Wl310) Elm St is at 1331 Lakeshore Circle, San Jose, in San Jose, California 95131. Its coordinates are 37.38451, -121.89306 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Willow Lake (Wl310) Elm St and when was it built?
Willow Lake (Wl310) Elm St has 81,772 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1989 as its year built. It is classed as multifamily housing.
Is Willow Lake (Wl310) Elm St covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2023 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, “Willow Lake (Wl310) Elm St, San Jose, California — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/california/willow-lake-wl310-elm-st-9158099d (data as of July 9, 2026).