Mason Devonshire Plaza
Wholesale Club/Supercenter in California, CA · 10314 Mason Ave, Chatsworth · 91311
At a glance
Mason Devonshire Plaza is a 61,111-square-foot wholesale club/supercenter at 10314 Mason Ave, Chatsworth in Chatsworth, California, built in 1967. In its 2021 California benchmarking disclosure it reported a site energy-use intensity of 122.8 kBtu/ft² and 524 tCO₂e of greenhouse-gas emissions.
AB 802 (Public Resources Code §25402.10) · reporting year 2021
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 122.8 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 524 tCO₂e |
| GHG intensity | 8.6 kgCO₂e/ft² |
| Electricity | 2,242,922 kWh |
| Gross floor area | 61,111 sq ft |
| Source record | california:6802237:2021 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2021latest | — | 122.8 kBtu/ft² | 524 tCO₂e | |
| 2020 | — | 124.2 kBtu/ft² | 520 tCO₂e | |
| 2019 | — | 151.8 kBtu/ft² | 615 tCO₂e | |
| 2018 | 27 | 86.4 kBtu/ft² | 372 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
- 10314 Mason Ave, Chatsworth
- City
- California
- State
- California
- ZIP
- 91311
- Coordinates
- 34.25766, -118.57982
Within ~1 km
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See also: most efficient in California · biggest emitters
How does Mason Devonshire Plaza compare with other wholesale club/supercenter buildings in California?
The latest disclosures cover 357 wholesale club/supercenter buildings in California, out of 40,029 buildings citywide. Its site EUI of 122.8 kBtu/ft² is about 57% above the average of 78.2 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 8.6 kgCO₂e/ft² is about twice the group average of 4.4 kgCO₂e/ft².
At 61,111 sq ft, it is about 59% below the average floor area of 148,797 sq ft for those buildings. It was built in 1967, 36 years earlier than the group's average year built (2003). Across all 24 jurisdictions BuildingCensus covers, the 482 wholesale club/supercenter buildings average an ENERGY STAR score of 71 and a site EUI of 79.1 kBtu/ft².
How has Mason Devonshire Plaza's energy performance changed over time?
BuildingCensus holds 4 California disclosures for Mason Devonshire Plaza, covering report years 2018–2021. Site EUI moved from 86.4 kBtu/ft² (2018) to 122.8 kBtu/ft² (2021), an 42% increase. Reported emissions went from 372 tCO₂e to 524 tCO₂e over the same span (up 41%).
What does a site EUI of 122.8 kBtu/ft² mean?
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. Mason Devonshire Plaza's 122.8 kBtu/ft² across 61,111 sq ft works out to about 7.5 billion Btu (2,199 MWh-equivalent) in 2021. The disclosure also reports 2,242,922 kWh of electricity for the year.
Which law requires Mason Devonshire Plaza to report its energy use?
Mason Devonshire Plaza 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 2021 disclosure (source record california:6802237:2021). 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 wholesale club/supercenter buildings in California
- Channing· 60,950 sq ft · EUI 1.3 kBtu/ft²
- 1330-1332 E Alondra Blvd + 901-961 S Long Beach Blvd· 60,051 sq ft · score 52 (D)
- 2155 Morrill Ave· 59,754 sq ft · score 21 (D)
- Fresno· 58,400 sq ft · score 49 (D)
- 6Th & La Wholesale Plaza, Llc· 58,273 sq ft
- 2925 Division St· 56,100 sq ft · score 13 (D)
- Wholesale Club/Supercenter buildings in California· 357 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 Mason Devonshire Plaza's energy grade?
Mason Devonshire Plaza did not report an ENERGY STAR score in its 2021 disclosure, but its site energy-use intensity was 122.8 kBtu/ft².
How much energy does Mason Devonshire Plaza use?
Its 2021 site energy-use intensity was 122.8 kBtu/ft² across 61,111 sq ft, including 2,242,922 kWh of electricity.
What are Mason Devonshire Plaza's carbon emissions?
Mason Devonshire Plaza reported 524 tCO₂e of greenhouse-gas emissions (8.6 kgCO₂e/ft²) for 2021.
Where is Mason Devonshire Plaza?
Mason Devonshire Plaza is at 10314 Mason Ave, Chatsworth, in Chatsworth, California 91311. Its coordinates are 34.25766, -118.57982 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Mason Devonshire Plaza and when was it built?
Mason Devonshire Plaza has 61,111 sq ft of gross floor area, as reported in its 2021 disclosure. The disclosure lists 1967 as its year built. It is classed as wholesale club/supercenter.
Is Mason Devonshire Plaza covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2021 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, “Mason Devonshire Plaza, Chatsworth, California — 2021 benchmarking disclosure”, https://buildingcensus.com/buildings/california/mason-devonshire-plaza-c3b817af (data as of July 9, 2026).