1310 Harbor Bay (Penumbra)
Office in California, CA · 1310 Harbor Bay Parkway, Alameda · 94502
At a glance
1310 Harbor Bay (Penumbra) is a 129,129-square-foot office building at 1310 Harbor Bay Parkway, Alameda in Alameda, California, built in 2021. 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 51.7 kBtu/ft² and 395 tCO₂e of greenhouse-gas emissions. That score is higher than 69% of the 4,912 scored office 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 | 51.7 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 395 tCO₂e |
| GHG intensity | 3.1 kgCO₂e/ft² |
| Electricity | 954,741 kWh |
| Natural gas | 33,741 therms |
| Gross floor area | 129,129 sq ft |
| Source record | california:21009528:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 92 | +2 | 51.7 kBtu/ft² | 395 tCO₂e |
| 2023 | 90 | -6 | 55.6 kBtu/ft² | 445 tCO₂e |
| 2022 | 96 | 44.1 kBtu/ft² | 345 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
- 1310 Harbor Bay Parkway, Alameda
- City
- California
- State
- California
- ZIP
- 94502
- Coordinates
- 37.72461, -122.23675
Within ~1 km
Nearby benchmarked buildings
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- 1650 Harbor Bay Parkwayscore 55
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- 1320 Harbor Bayscore 50
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- 1420 South Loop Llcscore 99
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See also: most efficient in California · biggest emitters
How does 1310 Harbor Bay (Penumbra) compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 1310 Harbor Bay (Penumbra)'s ENERGY STAR score of 92 compares with an average of 75 across the 4,912 that report a score; it scores higher than 69% of them and lower than 28%. Its site EUI of 51.7 kBtu/ft² is roughly in line with the average of 56.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 3.1 kgCO₂e/ft² is about 15% below the group average of 3.6 kgCO₂e/ft².
At 129,129 sq ft, it is about 15% below the average floor area of 151,937 sq ft for those buildings. It was built in 2021, 36 years later than the group's average year built (1985). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has 1310 Harbor Bay (Penumbra)'s energy performance changed over time?
BuildingCensus holds 3 California disclosures for 1310 Harbor Bay (Penumbra), covering report years 2022–2024. Its ENERGY STAR score went from 96 in 2022 to 92 in 2024 (-4 points); its best year on file was 2022, at 96. Site EUI moved from 44.1 kBtu/ft² (2022) to 51.7 kBtu/ft² (2024), an 17% increase. Reported emissions went from 345 tCO₂e to 395 tCO₂e over the same span (up 15%).
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. 1310 Harbor Bay (Penumbra)'s 51.7 kBtu/ft² across 129,129 sq ft works out to about 6.7 billion Btu (1,957 MWh-equivalent) in 2024. The disclosure also reports 954,741 kWh of electricity and 33,741 therms of natural gas for the year.
Which law requires 1310 Harbor Bay (Penumbra) to report its energy use?
1310 Harbor Bay (Penumbra) 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:21009528:2024). 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.
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Frequently asked questions
What is 1310 Harbor Bay (Penumbra)'s energy grade?
1310 Harbor Bay (Penumbra) 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 1310 Harbor Bay (Penumbra) use?
Its 2024 site energy-use intensity was 51.7 kBtu/ft² across 129,129 sq ft, including 954,741 kWh of electricity and 33,741 therms of natural gas.
What are 1310 Harbor Bay (Penumbra)'s carbon emissions?
1310 Harbor Bay (Penumbra) reported 395 tCO₂e of greenhouse-gas emissions (3.1 kgCO₂e/ft²) for 2024.
Where is 1310 Harbor Bay (Penumbra)?
1310 Harbor Bay (Penumbra) is at 1310 Harbor Bay Parkway, Alameda, in Alameda, California 94502. Its coordinates are 37.72461, -122.23675 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 1310 Harbor Bay (Penumbra) and when was it built?
1310 Harbor Bay (Penumbra) has 129,129 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2021 as its year built. It is classed as office.
Is 1310 Harbor Bay (Penumbra) 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, “1310 Harbor Bay (Penumbra), Alameda, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/1310-harbor-bay-penumbra-dd9188b4 (data as of July 9, 2026).