55 West Fifth I (Tower) - 29645
Multifamily Housing in California, CA · 55 West 5Th Avenue, San Mateo · 94402
At a glance
55 West Fifth I (Tower) - 29645 is a 129,775-square-foot multifamily housing building at 55 West 5Th Avenue, San Mateo in San Mateo, California, built in 1964. 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 37.5 kBtu/ft² and 286 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 | 37.5 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 286 tCO₂e |
| GHG intensity | 2.2 kgCO₂e/ft² |
| Electricity | 598,726 kWh |
| Natural gas | 28,232 therms |
| Gross floor area | 129,775 sq ft |
| Source record | california:6799792:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 92 | +61 | 37.5 kBtu/ft² | 286 tCO₂e |
| 2023 | 31 | +12 | 75.1 kBtu/ft² | 556 tCO₂e |
| 2022 | 19 | -80 | 84.9 kBtu/ft² | 618 tCO₂e |
| 2021 | 99 | +58 | 37.9 kBtu/ft² | 630 tCO₂e |
| 2020 | 41 | -10 | 61.3 kBtu/ft² | 1,070 tCO₂e |
| 2019 | 51 | 60.4 kBtu/ft² | 1,078 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
- 55 West 5Th Avenue, San Mateo
- City
- California
- State
- California
- ZIP
- 94402
- Coordinates
- 37.56026, -122.32537
Within ~1 km
Nearby benchmarked buildings
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- Avery Mills Square L.P.score —
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- 400 South El Camino Realscore 56
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See also: most efficient in California · biggest emitters
How does 55 West Fifth I (Tower) - 29645 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. 55 West Fifth I (Tower) - 29645'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 37.5 kBtu/ft² is roughly in line with the average of 34.4 kBtu/ft². Its emissions intensity of 2.2 kgCO₂e/ft² is roughly in line with the group average of 2.1 kgCO₂e/ft².
At 129,775 sq ft, it is about 14% below the average floor area of 150,919 sq ft for those buildings. It was built in 1964, 24 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 55 West Fifth I (Tower) - 29645's energy performance changed over time?
BuildingCensus holds 6 California disclosures for 55 West Fifth I (Tower) - 29645, covering report years 2019–2024. Its ENERGY STAR score went from 51 in 2019 to 92 in 2024 (+41 points); its best year on file was 2021, at 99. Site EUI moved from 60.4 kBtu/ft² (2019) to 37.5 kBtu/ft² (2024), a 38% decrease. Reported emissions went from 1,078 tCO₂e to 286 tCO₂e over the same span (down 74%).
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. 55 West Fifth I (Tower) - 29645's 37.5 kBtu/ft² across 129,775 sq ft works out to about 4.9 billion Btu (1,426 MWh-equivalent) in 2024. The disclosure also reports 598,726 kWh of electricity and 28,232 therms of natural gas for the year.
Which law requires 55 West Fifth I (Tower) - 29645 to report its energy use?
55 West Fifth I (Tower) - 29645 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:6799792:2024). 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
- 701 Minnesota St - Citiscape· 129,646 sq ft · score 100 (A)
- 1000 Kiely (Kl053)· 129,640 sq ft · score 91 (A)
- 1223 Webster St· 129,606 sq ft · score 100 (A)
- Sunnyvale Crossings Apartments, Llc· 129,600 sq ft · score 98 (A)
- Sereno Village - Total· 129,559 sq ft · score 97 (A)
- The Fillmore Center: Building D (Aggregate)· 129,553 sq ft · score 98 (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 55 West Fifth I (Tower) - 29645's energy grade?
55 West Fifth I (Tower) - 29645 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 55 West Fifth I (Tower) - 29645 use?
Its 2024 site energy-use intensity was 37.5 kBtu/ft² across 129,775 sq ft, including 598,726 kWh of electricity and 28,232 therms of natural gas.
What are 55 West Fifth I (Tower) - 29645's carbon emissions?
55 West Fifth I (Tower) - 29645 reported 286 tCO₂e of greenhouse-gas emissions (2.2 kgCO₂e/ft²) for 2024.
Where is 55 West Fifth I (Tower) - 29645?
55 West Fifth I (Tower) - 29645 is at 55 West 5Th Avenue, San Mateo, in San Mateo, California 94402. Its coordinates are 37.56026, -122.32537 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 55 West Fifth I (Tower) - 29645 and when was it built?
55 West Fifth I (Tower) - 29645 has 129,775 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1964 as its year built. It is classed as multifamily housing.
Is 55 West Fifth I (Tower) - 29645 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, “55 West Fifth I (Tower) - 29645, San Mateo, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/55-west-fifth-i-tower-29645-8bcc02ac (data as of July 9, 2026).