15Fifty5 (Fy11)
Multifamily Housing in California, CA · 1555 Riviera Avenue, Walnut Creek · 94596
At a glance
15Fifty5 (Fy11) is a 96,238-square-foot multifamily housing building at 1555 Riviera Avenue, Walnut Creek in Walnut Creek, California, built in 1990. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 95 out of 100 (grade A), a site energy-use intensity of 36.9 kBtu/ft² and 218 tCO₂e of greenhouse-gas emissions. That score is higher than 58% 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 | 95 (band A) |
| Site EUI | 36.9 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 218 tCO₂e |
| GHG intensity | 2.3 kgCO₂e/ft² |
| Electricity | 629,142 kWh |
| Natural gas | 14,295 therms |
| Gross floor area | 96,238 sq ft |
| Source record | california:6715456:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 95 | +3 | 36.9 kBtu/ft² | 218 tCO₂e |
| 2023 | 92 | +4 | 46.0 kBtu/ft² | 230 tCO₂e |
| 2022 | 88 | -5 | 48.6 kBtu/ft² | 239 tCO₂e |
| 2021 | 93 | -7 | 45.3 kBtu/ft² | 212 tCO₂e |
| 2020 | 100 | +28 | 10.4 kBtu/ft² | 210 tCO₂e |
| 2019 | 72 | 47.5 kBtu/ft² | 238 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
- 1555 Riviera Avenue, Walnut Creek
- City
- California
- State
- California
- ZIP
- 94596
- Coordinates
- 37.91063, -122.06675
Within ~1 km
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See also: most efficient in California · biggest emitters
How does 15Fifty5 (Fy11) 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. 15Fifty5 (Fy11)'s ENERGY STAR score of 95 compares with an average of 82 across the 9,612 that report a score; it scores higher than 58% of them and lower than 40%. Its site EUI of 36.9 kBtu/ft² is roughly in line with the average of 34.4 kBtu/ft². Its emissions intensity of 2.3 kgCO₂e/ft² is roughly in line with the group average of 2.1 kgCO₂e/ft².
At 96,238 sq ft, it is about 36% below the average floor area of 150,919 sq ft for those buildings. Its 1990 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 15Fifty5 (Fy11)'s energy performance changed over time?
BuildingCensus holds 6 California disclosures for 15Fifty5 (Fy11), covering report years 2019–2024. Its ENERGY STAR score went from 72 in 2019 to 95 in 2024 (+23 points); its best year on file was 2020, at 100. Site EUI moved from 47.5 kBtu/ft² (2019) to 36.9 kBtu/ft² (2024), a 22% decrease. Reported emissions went from 238 tCO₂e to 218 tCO₂e over the same span (down 8%).
What does an ENERGY STAR score of 95 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 95 means the building performs better than about 95% of its national peers. BuildingCensus bands the score into report-card grades; 95 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. 15Fifty5 (Fy11)'s 36.9 kBtu/ft² across 96,238 sq ft works out to about 3.6 billion Btu (1,041 MWh-equivalent) in 2024. The disclosure also reports 629,142 kWh of electricity and 14,295 therms of natural gas for the year.
Which law requires 15Fifty5 (Fy11) to report its energy use?
15Fifty5 (Fy11) 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:6715456:2024). 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
- 351-399 Union Ave (Nn047)· 96,234 sq ft · score 92 (A)
- Westbrook Plaza· 96,209 sq ft · score 100 (A)
- 555 - Terracina At Elk Grove· 96,207 sq ft · score 85 (A)
- 4065 Glencoe Ave, Marina Del Rey, Ca 90292, Usa· 96,187 sq ft · score 50 (D)
- Americana Simi Valley· 96,180 sq ft · score 87 (A)
- Palm Springs View Apartments· 96,173 sq ft · score 99 (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 15Fifty5 (Fy11)'s energy grade?
15Fifty5 (Fy11) scores 95 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 15Fifty5 (Fy11) use?
Its 2024 site energy-use intensity was 36.9 kBtu/ft² across 96,238 sq ft, including 629,142 kWh of electricity and 14,295 therms of natural gas.
What are 15Fifty5 (Fy11)'s carbon emissions?
15Fifty5 (Fy11) reported 218 tCO₂e of greenhouse-gas emissions (2.3 kgCO₂e/ft²) for 2024.
Where is 15Fifty5 (Fy11)?
15Fifty5 (Fy11) is at 1555 Riviera Avenue, Walnut Creek, in Walnut Creek, California 94596. Its coordinates are 37.91063, -122.06675 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 15Fifty5 (Fy11) and when was it built?
15Fifty5 (Fy11) has 96,238 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1990 as its year built. It is classed as multifamily housing.
Is 15Fifty5 (Fy11) 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, “15Fifty5 (Fy11), Walnut Creek, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/15fifty5-fy11-f8c63fd8 (data as of July 9, 2026).