The Havens - Essex (Sy11)
Multifamily Housing in California, CA · 10441 Slater Avenue, Fountain Valley · 92708
At a glance
The Havens - Essex (Sy11) is a 416,248-square-foot multifamily housing building at 10441 Slater Avenue, Fountain Valley in Fountain Valley, California, built in 1969. In its 2023 California benchmarking disclosure it reported an ENERGY STAR score of 64 out of 100 (grade C), a site energy-use intensity of 31.9 kBtu/ft² and 871 tCO₂e of greenhouse-gas emissions. That score is higher than 17% of the 9,612 scored multifamily housing buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 64 (band C) |
| Site EUI | 31.9 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 871 tCO₂e |
| GHG intensity | 2.1 kgCO₂e/ft² |
| Electricity | 2,710,903 kWh |
| Natural gas | 40,451 therms |
| Gross floor area | 416,248 sq ft |
| Source record | california:6845382:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 64 | -30 | 31.9 kBtu/ft² | 871 tCO₂e |
| 2022 | 94 | +1 | 25.9 kBtu/ft² | 690 tCO₂e |
| 2021 | 93 | +21 | 28.8 kBtu/ft² | 740 tCO₂e |
| 2020 | 72 | +17 | 48.3 kBtu/ft² | 1,100 tCO₂e |
| 2019 | 55 | 54.6 kBtu/ft² | 1,305 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
- 10441 Slater Avenue, Fountain Valley
- City
- California
- State
- California
- ZIP
- 92708
- Coordinates
- 33.70990, -117.94697
Within ~1 km
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See also: most efficient in California · biggest emitters
How does The Havens - Essex (Sy11) 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. The Havens - Essex (Sy11)'s ENERGY STAR score of 64 compares with an average of 82 across the 9,612 that report a score; it scores higher than 17% of them and lower than 83%. Its site EUI of 31.9 kBtu/ft² is roughly in line with the average of 34.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 2.1 kgCO₂e/ft² is roughly in line with the group average of 2.1 kgCO₂e/ft².
At 416,248 sq ft, it is about 176% above the average floor area of 150,919 sq ft for those buildings. It was built in 1969, 19 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 The Havens - Essex (Sy11)'s energy performance changed over time?
BuildingCensus holds 5 California disclosures for The Havens - Essex (Sy11), covering report years 2019–2023. Its ENERGY STAR score went from 55 in 2019 to 64 in 2023 (+9 points); its best year on file was 2022, at 94. Site EUI moved from 54.6 kBtu/ft² (2019) to 31.9 kBtu/ft² (2023), a 42% decrease. Reported emissions went from 1,305 tCO₂e to 871 tCO₂e over the same span (down 33%).
What does an ENERGY STAR score of 64 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 64 means the building performs better than about 64% of its national peers. BuildingCensus bands the score into report-card grades; 64 falls in band C — below median (55–69). It sits 11 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. The Havens - Essex (Sy11)'s 31.9 kBtu/ft² across 416,248 sq ft works out to about 13.3 billion Btu (3,891 MWh-equivalent) in 2023. The disclosure also reports 2,710,903 kWh of electricity and 40,451 therms of natural gas for the year.
Which law requires The Havens - Essex (Sy11) to report its energy use?
The Havens - Essex (Sy11) 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 2023 disclosure (source record california:6845382:2023). 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
- Santa Palmia 150 (Sn358, Sn359, Ci003) - Essex· 416,148 sq ft · score 75 (B)
- Meadowbrook: Meadowbrook· 416,065 sq ft · score 100 (A)
- Foster'S Landing - Essex (Fs05)· 416,015 sq ft · score 96 (A)
- Bell Warner Center (Hn122)· 416,003 sq ft · score 93 (A)
- River View I· 415,641 sq ft · score 76 (B)
- Montanosa-Essex (Mn72)· 414,968 sq ft · score 5 (D)
- 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 The Havens - Essex (Sy11)'s energy grade?
The Havens - Essex (Sy11) scores 64 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2023 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does The Havens - Essex (Sy11) use?
Its 2023 site energy-use intensity was 31.9 kBtu/ft² across 416,248 sq ft, including 2,710,903 kWh of electricity and 40,451 therms of natural gas.
What are The Havens - Essex (Sy11)'s carbon emissions?
The Havens - Essex (Sy11) reported 871 tCO₂e of greenhouse-gas emissions (2.1 kgCO₂e/ft²) for 2023.
Where is The Havens - Essex (Sy11)?
The Havens - Essex (Sy11) is at 10441 Slater Avenue, Fountain Valley, in Fountain Valley, California 92708. Its coordinates are 33.70990, -117.94697 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is The Havens - Essex (Sy11) and when was it built?
The Havens - Essex (Sy11) has 416,248 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1969 as its year built. It is classed as multifamily housing.
Is The Havens - Essex (Sy11) covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2023 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, “The Havens - Essex (Sy11), Fountain Valley, California — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/california/the-havens-essex-sy11-8798295a (data as of July 9, 2026).