1451 Harbor Bay Llc
Office in California, CA · 1451 Harbor Bay Parkway, Alameda · 94502
At a glance
1451 Harbor Bay Llc is a 86,055-square-foot office building at 1451 Harbor Bay Parkway, Alameda in Alameda, California, built in 1985. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 89 out of 100 (grade A), a site energy-use intensity of 25.6 kBtu/ft² and 137 tCO₂e of greenhouse-gas emissions. That score is higher than 61% 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 | 89 (band A) |
| Site EUI | 25.6 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 137 tCO₂e |
| GHG intensity | 1.6 kgCO₂e/ft² |
| Electricity | 448,404 kWh |
| Natural gas | 6,750 therms |
| Gross floor area | 86,055 sq ft |
| Source record | california:19927278:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 89 | +8 | 25.6 kBtu/ft² | 137 tCO₂e |
| 2023 | 81 | +31 | 30.8 kBtu/ft² | 175 tCO₂e |
| 2022 | 50 | +5 | 56.9 kBtu/ft² | 301 tCO₂e |
| 2021 | 45 | 57.6 kBtu/ft² | 282 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
- 1451 Harbor Bay Parkway, Alameda
- City
- California
- State
- California
- ZIP
- 94502
- Coordinates
- 37.72783, -122.23676
Within ~1 km
Nearby benchmarked buildings
Office · 220,517 sq ft
- 1310 Harbor Bay (Penumbra)score 92
Office · 129,129 sq ft
- 1650 Harbor Bay Parkwayscore 55
Office · 125,205 sq ft
- 1320 Harbor Bayscore 50
Office · 124,061 sq ft
- 1420 South Loop Llcscore 99
Office · 121,216 sq ft
Office · 118,847 sq ft
See also: most efficient in California · biggest emitters
How does 1451 Harbor Bay Llc compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 1451 Harbor Bay Llc's ENERGY STAR score of 89 compares with an average of 75 across the 4,912 that report a score; it scores higher than 61% of them and lower than 36%. Its site EUI of 25.6 kBtu/ft² is about half of 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 1.6 kgCO₂e/ft² is about 56% below the group average of 3.6 kgCO₂e/ft².
At 86,055 sq ft, it is about 43% below the average floor area of 151,937 sq ft for those buildings. Its 1985 construction date is close to 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 1451 Harbor Bay Llc's energy performance changed over time?
BuildingCensus holds 4 California disclosures for 1451 Harbor Bay Llc, covering report years 2021–2024. Its ENERGY STAR score went from 45 in 2021 to 89 in 2024 (+44 points). Site EUI moved from 57.6 kBtu/ft² (2021) to 25.6 kBtu/ft² (2024), a 56% decrease. Reported emissions went from 282 tCO₂e to 137 tCO₂e over the same span (down 51%).
What does an ENERGY STAR score of 89 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 89 means the building performs better than about 89% of its national peers. BuildingCensus bands the score into report-card grades; 89 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. 1451 Harbor Bay Llc's 25.6 kBtu/ft² across 86,055 sq ft works out to about 2.2 billion Btu (646 MWh-equivalent) in 2024. The disclosure also reports 448,404 kWh of electricity and 6,750 therms of natural gas for the year.
Which law requires 1451 Harbor Bay Llc to report its energy use?
1451 Harbor Bay Llc 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:19927278:2024). 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 office buildings in California
- 805 Veterans Blvd· 86,000 sq ft · score 98 (A)
- 1101 Pacific Ave· 86,000 sq ft · score 72 (B)
- Ketchum-Downtown Ymca· 86,000 sq ft · score 22 (D)
- Kolawa 101 E Huntington· 85,986 sq ft · score 93 (A)
- Community Health Group· 85,920 sq ft · score 84 (B)
- Creekside E· 85,913 sq ft · score 98 (A)
- Office buildings in California· 6,214 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 1451 Harbor Bay Llc's energy grade?
1451 Harbor Bay Llc scores 89 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 1451 Harbor Bay Llc use?
Its 2024 site energy-use intensity was 25.6 kBtu/ft² across 86,055 sq ft, including 448,404 kWh of electricity and 6,750 therms of natural gas.
What are 1451 Harbor Bay Llc's carbon emissions?
1451 Harbor Bay Llc reported 137 tCO₂e of greenhouse-gas emissions (1.6 kgCO₂e/ft²) for 2024.
Where is 1451 Harbor Bay Llc?
1451 Harbor Bay Llc is at 1451 Harbor Bay Parkway, Alameda, in Alameda, California 94502. Its coordinates are 37.72783, -122.23676 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 1451 Harbor Bay Llc and when was it built?
1451 Harbor Bay Llc has 86,055 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1985 as its year built. It is classed as office.
Is 1451 Harbor Bay Llc 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, “1451 Harbor Bay Llc, Alameda, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/1451-harbor-bay-llc-4187e309 (data as of July 9, 2026).