Chateau Apartments
Multifamily Housing in California, CA · 302 Easy Street, Mountain View · 94043
At a glance
Chateau Apartments is a 61,480-square-foot multifamily housing building at 302 Easy Street, Mountain View in Mountain View, California, built in 1969. In its 2023 California benchmarking disclosure it reported an ENERGY STAR score of 100 out of 100 (grade A), a site energy-use intensity of 20.5 kBtu/ft² and 70 tCO₂e of greenhouse-gas emissions. That score is higher than 76% 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 | 100 (band A) |
| Site EUI | 20.5 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 70 tCO₂e |
| GHG intensity | 1.1 kgCO₂e/ft² |
| Electricity | 26,179 kWh |
| Natural gas | 11,883 therms |
| Gross floor area | 61,480 sq ft |
| Source record | california:27374192:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 100 | ±0 | 20.5 kBtu/ft² | 70 tCO₂e |
| 2022 | 100 | 20.5 kBtu/ft² | 69 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
- 302 Easy Street, Mountain View
- City
- California
- State
- California
- ZIP
- 94043
- Coordinates
- 37.39922, -122.06651
Within ~1 km
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See also: most efficient in California · biggest emitters
How does Chateau Apartments 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. Chateau Apartments's ENERGY STAR score of 100 compares with an average of 82 across the 9,612 that report a score; it scores higher than 76% of them. Its site EUI of 20.5 kBtu/ft² is about 40% below 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 1.1 kgCO₂e/ft² is about half of the group average of 2.1 kgCO₂e/ft².
At 61,480 sq ft, it is about 59% below 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 Chateau Apartments's energy performance changed over time?
BuildingCensus holds 2 California disclosures for Chateau Apartments, covering report years 2022–2023. Its ENERGY STAR score was 100 in both 2022 and 2023. Site EUI moved from 20.5 kBtu/ft² (2022) to 20.5 kBtu/ft² (2023), an 0% increase. Reported emissions went from 69 tCO₂e to 70 tCO₂e over the same span (up 1%).
What does an ENERGY STAR score of 100 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: 100 is the top of the scale. BuildingCensus bands the score into report-card grades; 100 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. Chateau Apartments's 20.5 kBtu/ft² across 61,480 sq ft works out to about 1.3 billion Btu (369 MWh-equivalent) in 2023. The disclosure also reports 26,179 kWh of electricity and 11,883 therms of natural gas for the year.
Which law requires Chateau Apartments to report its energy use?
Chateau Apartments 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:27374192:2023). 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
- Mango Tree· 61,476 sq ft · score 63 (C)
- Encore Sr Hall (Nc08)· 61,473 sq ft · score 67 (C)
- Colonial House· 61,463 sq ft · score 74 (B)
- 720 Willow Street· 61,446 sq ft · score 1 (D)
- Q19 Apartments· 61,445 sq ft · score 78 (B)
- Horizons At Morgan Hill· 61,421 sq ft · score 89 (A)
- 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 Chateau Apartments's energy grade?
Chateau Apartments scores 100 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2023 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Chateau Apartments use?
Its 2023 site energy-use intensity was 20.5 kBtu/ft² across 61,480 sq ft, including 26,179 kWh of electricity and 11,883 therms of natural gas.
What are Chateau Apartments's carbon emissions?
Chateau Apartments reported 70 tCO₂e of greenhouse-gas emissions (1.1 kgCO₂e/ft²) for 2023.
Where is Chateau Apartments?
Chateau Apartments is at 302 Easy Street, Mountain View, in Mountain View, California 94043. Its coordinates are 37.39922, -122.06651 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Chateau Apartments and when was it built?
Chateau Apartments has 61,480 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 Chateau Apartments 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, “Chateau Apartments, Mountain View, California — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/california/chateau-apartments-72586d93 (data as of July 9, 2026).