San Diego Square - Winn (West)
Multifamily Housing in California, CA · 1055 Ninth Avenue, San Diego · 92101
At a glance
San Diego Square - Winn (West) is a 156,000-square-foot multifamily housing building at 1055 Ninth Avenue, San Diego in San Diego, California, built in 1980. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 82 out of 100 (grade B) and a site energy-use intensity of 41.7 kBtu/ft². That score is higher than 34% 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 | 82 (band B) |
| Site EUI | 41.7 kBtu/ft² |
| Source EUI | — |
| GHG emissions | — |
| GHG intensity | — |
| Electricity | 740,352 kWh |
| Gross floor area | 156,000 sq ft |
| Source record | california:16429146:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 82 | 41.7 kBtu/ft² | — | |
| 2023 | — | 38.8 kBtu/ft² | — | |
| 2022 | 81 | ±0 | 40.7 kBtu/ft² | 387 tCO₂e |
| 2021 | 81 | +24 | 40.4 kBtu/ft² | 349 tCO₂e |
| 2020 | 57 | 45.9 kBtu/ft² | 422 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.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 1055 Ninth Avenue, San Diego
- City
- California
- State
- California
- ZIP
- 92101
- Coordinates
- 32.71611, -117.15612
Within ~1 km
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- Symphony Towerscore 85
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- Diega (Dg062)score 76
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See also: most efficient in California · biggest emitters
How does San Diego Square - Winn (West) 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. San Diego Square - Winn (West)'s ENERGY STAR score of 82 compares with an average of 82 across the 9,612 that report a score; it scores higher than 34% of them and lower than 65%. Its site EUI of 41.7 kBtu/ft² is about 21% above the average of 34.4 kBtu/ft² — it uses more energy per square foot than the typical building in that group.
At 156,000 sq ft, it is roughly in line with the average floor area of 150,919 sq ft for those buildings. It was built in 1980, 8 years earlier 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 San Diego Square - Winn (West)'s energy performance changed over time?
BuildingCensus holds 5 California disclosures for San Diego Square - Winn (West), covering report years 2020–2024. Its ENERGY STAR score went from 57 in 2020 to 82 in 2024 (+25 points). Site EUI moved from 45.9 kBtu/ft² (2020) to 41.7 kBtu/ft² (2024), a 9% decrease. Reported emissions went from 422 tCO₂e to 387 tCO₂e over the same span (down 8%).
What does an ENERGY STAR score of 82 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 82 means the building performs better than about 82% of its national peers. BuildingCensus bands the score into report-card grades; 82 falls in band B — above median (70–84). 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. San Diego Square - Winn (West)'s 41.7 kBtu/ft² across 156,000 sq ft works out to about 6.5 billion Btu (1,906 MWh-equivalent) in 2024. The disclosure also reports 740,352 kWh of electricity for the year.
Which law requires San Diego Square - Winn (West) to report its energy use?
San Diego Square - Winn (West) 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:16429146:2024). 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
- Merritt On 3Rd (Mr336)· 155,965 sq ft · score 83 (B)
- 1606 Rory Ln, Simi Valley, Ca 93063, Usa· 155,945 sq ft · score 100 (A)
- Juniper Village Apartments· 155,875 sq ft · score 81 (B)
- The Gallery· 155,860 sq ft · score 95 (A)
- Greenpointe (Gr671)· 155,855 sq ft · score 97 (A)
- Cobalt Apartments· 155,795 sq ft · EUI 43.8 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 San Diego Square - Winn (West)'s energy grade?
San Diego Square - Winn (West) scores 82 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does San Diego Square - Winn (West) use?
Its 2024 site energy-use intensity was 41.7 kBtu/ft² across 156,000 sq ft, including 740,352 kWh of electricity.
What are San Diego Square - Winn (West)'s carbon emissions?
No greenhouse-gas emissions figure was reported for 2024.
Where is San Diego Square - Winn (West)?
San Diego Square - Winn (West) is at 1055 Ninth Avenue, San Diego, in San Diego, California 92101. Its coordinates are 32.71611, -117.15612 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is San Diego Square - Winn (West) and when was it built?
San Diego Square - Winn (West) has 156,000 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1980 as its year built. It is classed as multifamily housing.
Is San Diego Square - Winn (West) 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, “San Diego Square - Winn (West), San Diego, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/san-diego-square-winn-west-30955e9a (data as of July 9, 2026).