The Knolls (Kn42)
Multifamily Housing in California, CA · 2544 Vista Wood Circle, Thousand Oaks · 91362
At a glance
The Knolls (Kn42) is a 594,047-square-foot multifamily housing building at 2544 Vista Wood Circle, Thousand Oaks in Thousand Oaks, California, built in 1990. 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 40.9 kBtu/ft² and 1,464 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 | 40.9 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 1,464 tCO₂e |
| GHG intensity | 2.5 kgCO₂e/ft² |
| Electricity | 2,808,232 kWh |
| Natural gas | 155,969 therms |
| Gross floor area | 594,047 sq ft |
| Source record | california:2330029:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 92 | +11 | 40.9 kBtu/ft² | 1,464 tCO₂e |
| 2023 | 81 | +8 | 42.7 kBtu/ft² | 1,541 tCO₂e |
| 2022 | 73 | +24 | 45.1 kBtu/ft² | 1,535 tCO₂e |
| 2021 | 49 | -28 | 44.9 kBtu/ft² | 1,494 tCO₂e |
| 2020 | 77 | 29.2 kBtu/ft² | 1,074 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
- 2544 Vista Wood Circle, Thousand Oaks
- City
- California
- State
- California
- ZIP
- 91362
- Coordinates
- 34.21344, -118.82647
Within ~1 km
Nearby benchmarked buildings
- The Knollsscore 59
Multifamily Housing · 594,047 sq ft
- Westlake Canyon (Wk05)score 85
Multifamily Housing · 123,776 sq ft
- Westlake Canyonscore 93
Multifamily Housing · 123,776 sq ft
See also: most efficient in California · biggest emitters
How does The Knolls (Kn42) 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 Knolls (Kn42)'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 40.9 kBtu/ft² is about 19% above the average of 34.4 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 2.5 kgCO₂e/ft² is about 17% above the group average of 2.1 kgCO₂e/ft².
At 594,047 sq ft, it is about 294% above the average floor area of 150,919 sq ft for those buildings. Its 1990 construction date is close to 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 Knolls (Kn42)'s energy performance changed over time?
BuildingCensus holds 5 California disclosures for The Knolls (Kn42), covering report years 2020–2024. Its ENERGY STAR score went from 77 in 2020 to 92 in 2024 (+15 points). Site EUI moved from 29.2 kBtu/ft² (2020) to 40.9 kBtu/ft² (2024), an 40% increase. Reported emissions went from 1,074 tCO₂e to 1,464 tCO₂e over the same span (up 36%).
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. The Knolls (Kn42)'s 40.9 kBtu/ft² across 594,047 sq ft works out to about 24.3 billion Btu (7,121 MWh-equivalent) in 2024. The disclosure also reports 2,808,232 kWh of electricity and 155,969 therms of natural gas for the year.
Which law requires The Knolls (Kn42) to report its energy use?
The Knolls (Kn42) 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:2330029:2024). 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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- 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 Knolls (Kn42)'s energy grade?
The Knolls (Kn42) 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 The Knolls (Kn42) use?
Its 2024 site energy-use intensity was 40.9 kBtu/ft² across 594,047 sq ft, including 2,808,232 kWh of electricity and 155,969 therms of natural gas.
What are The Knolls (Kn42)'s carbon emissions?
The Knolls (Kn42) reported 1,464 tCO₂e of greenhouse-gas emissions (2.5 kgCO₂e/ft²) for 2024.
Where is The Knolls (Kn42)?
The Knolls (Kn42) is at 2544 Vista Wood Circle, Thousand Oaks, in Thousand Oaks, California 91362. Its coordinates are 34.21344, -118.82647 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is The Knolls (Kn42) and when was it built?
The Knolls (Kn42) has 594,047 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1990 as its year built. It is classed as multifamily housing.
Is The Knolls (Kn42) 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, “The Knolls (Kn42), Thousand Oaks, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/the-knolls-kn42-afc01679 (data as of July 9, 2026).