Waterfront At Harbor Bay 1851
Office in California, CA · 1851 Harbor Bay Parkway, Alameda · 94502
At a glance
Waterfront At Harbor Bay 1851 is a 61,010-square-foot office building at 1851 Harbor Bay Parkway, Alameda in Alameda, California, built in 1999. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 69 out of 100 (grade C), a site energy-use intensity of 61.3 kBtu/ft² and 204 tCO₂e of greenhouse-gas emissions. That score is higher than 29% 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 | 69 (band C) |
| Site EUI | 61.3 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 204 tCO₂e |
| GHG intensity | 3.4 kgCO₂e/ft² |
| Electricity | 526,952 kWh |
| Natural gas | 19,150 therms |
| Gross floor area | 61,010 sq ft |
| Source record | california:1429829:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 69 | 61.3 kBtu/ft² | 204 tCO₂e | |
| 2021 | — | 66.3 kBtu/ft² | 234 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
- 1851 Harbor Bay Parkway, Alameda
- City
- California
- State
- California
- ZIP
- 94502
- Coordinates
- 37.72631, -122.24367
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
- Waterfront At Harbor Bay 1750score 16
Non-Refrigerated Warehouse · 100,909 sq ft
See also: most efficient in California · biggest emitters
How does Waterfront At Harbor Bay 1851 compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. Waterfront At Harbor Bay 1851's ENERGY STAR score of 69 compares with an average of 75 across the 4,912 that report a score; it scores higher than 29% of them and lower than 70%. Its site EUI of 61.3 kBtu/ft² is roughly in line with the average of 56.4 kBtu/ft². Its emissions intensity of 3.4 kgCO₂e/ft² is roughly in line with the group average of 3.6 kgCO₂e/ft².
At 61,010 sq ft, it is about 60% below the average floor area of 151,937 sq ft for those buildings. It was built in 1999, 14 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 Waterfront At Harbor Bay 1851's energy performance changed over time?
BuildingCensus holds 2 California disclosures for Waterfront At Harbor Bay 1851, covering report years 2021, 2024. Site EUI moved from 66.3 kBtu/ft² (2021) to 61.3 kBtu/ft² (2024), a 8% decrease. Reported emissions went from 234 tCO₂e to 204 tCO₂e over the same span (down 13%).
What does an ENERGY STAR score of 69 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 69 means the building performs better than about 69% of its national peers. BuildingCensus bands the score into report-card grades; 69 falls in band C — below median (55–69). It sits 6 points below 75, the threshold for ENERGY STAR certification. 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. Waterfront At Harbor Bay 1851's 61.3 kBtu/ft² across 61,010 sq ft works out to about 3.7 billion Btu (1,096 MWh-equivalent) in 2024. The disclosure also reports 526,952 kWh of electricity and 19,150 therms of natural gas for the year.
Which law requires Waterfront At Harbor Bay 1851 to report its energy use?
Waterfront At Harbor Bay 1851 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:1429829:2024). 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
- Public Health Facility· 61,000 sq ft · score 12 (D)
- Broadway Media Center· 60,998 sq ft · score 97 (A)
- Marina View· 60,994 sq ft · score 46 (D)
- 1412_Ptegrand_240· 60,964 sq ft · score 1 (D)
- Westlake Village Natomas L.P.· 60,958 sq ft · score 71 (B)
- 760 Paseo Camarillo· 60,958 sq ft
- 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 Waterfront At Harbor Bay 1851's energy grade?
Waterfront At Harbor Bay 1851 scores 69 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Waterfront At Harbor Bay 1851 use?
Its 2024 site energy-use intensity was 61.3 kBtu/ft² across 61,010 sq ft, including 526,952 kWh of electricity and 19,150 therms of natural gas.
What are Waterfront At Harbor Bay 1851's carbon emissions?
Waterfront At Harbor Bay 1851 reported 204 tCO₂e of greenhouse-gas emissions (3.4 kgCO₂e/ft²) for 2024.
Where is Waterfront At Harbor Bay 1851?
Waterfront At Harbor Bay 1851 is at 1851 Harbor Bay Parkway, Alameda, in Alameda, California 94502. Its coordinates are 37.72631, -122.24367 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Waterfront At Harbor Bay 1851 and when was it built?
Waterfront At Harbor Bay 1851 has 61,010 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1999 as its year built. It is classed as office.
Is Waterfront At Harbor Bay 1851 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).
Working with California building benchmarking records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Waterfront At Harbor Bay 1851, Alameda, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/waterfront-at-harbor-bay-1851-4721f4c0 (data as of July 9, 2026).