Westlake 355 Southgate - Gerson
Multifamily Housing in California, CA · 355 Southgate Ave, Daly City · 94015
At a glance
Westlake 355 Southgate - Gerson is a 53,000-square-foot multifamily housing building at 355 Southgate Ave, Daly City in Daly City, California, built in 1963. In its 2020 California benchmarking disclosure it reported an ENERGY STAR score of 92 out of 100 (grade A), a site energy-use intensity of 34.7 kBtu/ft² and 102 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 2020
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 92 (band A) |
| Site EUI | 34.7 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 102 tCO₂e |
| GHG intensity | 1.9 kgCO₂e/ft² |
| Electricity | 126,928 kWh |
| Natural gas | 13,742 therms |
| Gross floor area | 53,000 sq ft |
| Source record | california:6879834:2020 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2020latest | 92 | +3 | 34.7 kBtu/ft² | 102 tCO₂e |
| 2019 | 89 | 36.2 kBtu/ft² | 108 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
- 355 Southgate Ave, Daly City
- City
- California
- State
- California
- ZIP
- 94015
- Coordinates
- 37.69710, -122.48593
Within ~1 km
Nearby benchmarked buildings
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See also: most efficient in California · biggest emitters
How does Westlake 355 Southgate - Gerson 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. Westlake 355 Southgate - Gerson'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 34.7 kBtu/ft² is roughly in line with the average of 34.4 kBtu/ft². Its emissions intensity of 1.9 kgCO₂e/ft² is roughly in line with the group average of 2.1 kgCO₂e/ft².
At 53,000 sq ft, it is about 65% below the average floor area of 150,919 sq ft for those buildings. It was built in 1963, 25 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 Westlake 355 Southgate - Gerson's energy performance changed over time?
BuildingCensus holds 2 California disclosures for Westlake 355 Southgate - Gerson, covering report years 2019–2020. Its ENERGY STAR score went from 89 in 2019 to 92 in 2020 (+3 points). Site EUI moved from 36.2 kBtu/ft² (2019) to 34.7 kBtu/ft² (2020), a 4% decrease. Reported emissions went from 108 tCO₂e to 102 tCO₂e over the same span (down 5%).
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. Westlake 355 Southgate - Gerson's 34.7 kBtu/ft² across 53,000 sq ft works out to about 1.8 billion Btu (539 MWh-equivalent) in 2020. The disclosure also reports 126,928 kWh of electricity and 13,742 therms of natural gas for the year.
Which law requires Westlake 355 Southgate - Gerson to report its energy use?
Westlake 355 Southgate - Gerson 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 2020 disclosure (source record california:6879834:2020). 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
- 618 - Newark Station Senior· 52,993 sq ft · score 92 (A)
- Aspire Redlands (As143)· 52,991 sq ft · score 75 (B)
- 1203 E Central Ave, Redlands, Ca 92374, Usa· 52,991 sq ft · score 68 (C)
- Ca111_Building 2· 52,971 sq ft · score 26 (D)
- 1209 S Lake St - Lake Apartments· 52,968 sq ft · score 32 (D)
- 2001 California St· 52,950 sq ft · score 74 (B)
- 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 Westlake 355 Southgate - Gerson's energy grade?
Westlake 355 Southgate - Gerson scores 92 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2020 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Westlake 355 Southgate - Gerson use?
Its 2020 site energy-use intensity was 34.7 kBtu/ft² across 53,000 sq ft, including 126,928 kWh of electricity and 13,742 therms of natural gas.
What are Westlake 355 Southgate - Gerson's carbon emissions?
Westlake 355 Southgate - Gerson reported 102 tCO₂e of greenhouse-gas emissions (1.9 kgCO₂e/ft²) for 2020.
Where is Westlake 355 Southgate - Gerson?
Westlake 355 Southgate - Gerson is at 355 Southgate Ave, Daly City, in Daly City, California 94015. Its coordinates are 37.69710, -122.48593 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Westlake 355 Southgate - Gerson and when was it built?
Westlake 355 Southgate - Gerson has 53,000 sq ft of gross floor area, as reported in its 2020 disclosure. The disclosure lists 1963 as its year built. It is classed as multifamily housing.
Is Westlake 355 Southgate - Gerson covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2020 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, “Westlake 355 Southgate - Gerson, Daly City, California — 2020 benchmarking disclosure”, https://buildingcensus.com/buildings/california/westlake-355-southgate-gerson-723ee71e (data as of July 9, 2026).