Mission Hills Apartments - Essex (Ms126)
Multifamily Housing in California, CA · 264 Rancho Del Oro Dr, Oceanside · 92057
At a glance
Mission Hills Apartments - Essex (Ms126) is a 279,660-square-foot multifamily housing building at 264 Rancho Del Oro Dr, Oceanside in Oceanside, California, built in 1984. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 34 out of 100 (grade D), a site energy-use intensity of 63.8 kBtu/ft² and 1,022 tCO₂e of greenhouse-gas emissions. That score is higher than 6% 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 | 34 (band D) |
| Site EUI | 63.8 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 1,022 tCO₂e |
| GHG intensity | 3.6 kgCO₂e/ft² |
| Electricity | 1,394,709 kWh |
| Natural gas | 132,920 therms |
| Gross floor area | 279,660 sq ft |
| Source record | california:23352096:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 34 | -3 | 63.8 kBtu/ft² | 1,022 tCO₂e |
| 2023 | 37 | +15 | 57.5 kBtu/ft² | 952 tCO₂e |
| 2022 | 22 | -74 | 57.1 kBtu/ft² | 1,010 tCO₂e |
| 2021 | 96 | 29.9 kBtu/ft² | 504 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
- 264 Rancho Del Oro Dr, Oceanside
- City
- California
- State
- California
- ZIP
- 92057
- Coordinates
- 33.22277, -117.31955
Within ~1 km
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See also: most efficient in California · biggest emitters
How does Mission Hills Apartments - Essex (Ms126) 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. Mission Hills Apartments - Essex (Ms126)'s ENERGY STAR score of 34 compares with an average of 82 across the 9,612 that report a score; it scores higher than 6% of them and lower than 94%. Its site EUI of 63.8 kBtu/ft² is about 85% 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 3.6 kgCO₂e/ft² is about 74% above the group average of 2.1 kgCO₂e/ft².
At 279,660 sq ft, it is about 85% above the average floor area of 150,919 sq ft for those buildings. It was built in 1984, 4 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 Mission Hills Apartments - Essex (Ms126)'s energy performance changed over time?
BuildingCensus holds 4 California disclosures for Mission Hills Apartments - Essex (Ms126), covering report years 2021–2024. Its ENERGY STAR score went from 96 in 2021 to 34 in 2024 (-62 points); its best year on file was 2021, at 96. Site EUI moved from 29.9 kBtu/ft² (2021) to 63.8 kBtu/ft² (2024), an 113% increase. Reported emissions went from 504 tCO₂e to 1,022 tCO₂e over the same span (up 103%).
What does an ENERGY STAR score of 34 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 34 means the building performs better than about 34% of its national peers. BuildingCensus bands the score into report-card grades; 34 falls in band D — lowest band (1–54). It sits 41 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. Mission Hills Apartments - Essex (Ms126)'s 63.8 kBtu/ft² across 279,660 sq ft works out to about 17.8 billion Btu (5,229 MWh-equivalent) in 2024. The disclosure also reports 1,394,709 kWh of electricity and 132,920 therms of natural gas for the year.
Which law requires Mission Hills Apartments - Essex (Ms126) to report its energy use?
Mission Hills Apartments - Essex (Ms126) 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:23352096:2024). 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 multifamily housing buildings in California
- Hollister Village (Hs27)· 279,269 sq ft · score 96 (A)
- Cortesia - Essex (Ct39)· 279,030 sq ft · score 82 (B)
- Coventry Cove· 279,000 sq ft · score 67 (C)
- 33 Tehama· 279,000 sq ft
- Kendry (Lx068)· 278,874 sq ft · score 99 (A)
- The Vines At Riverpark· 278,744 sq ft · score 98 (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 Mission Hills Apartments - Essex (Ms126)'s energy grade?
Mission Hills Apartments - Essex (Ms126) scores 34 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Mission Hills Apartments - Essex (Ms126) use?
Its 2024 site energy-use intensity was 63.8 kBtu/ft² across 279,660 sq ft, including 1,394,709 kWh of electricity and 132,920 therms of natural gas.
What are Mission Hills Apartments - Essex (Ms126)'s carbon emissions?
Mission Hills Apartments - Essex (Ms126) reported 1,022 tCO₂e of greenhouse-gas emissions (3.6 kgCO₂e/ft²) for 2024.
Where is Mission Hills Apartments - Essex (Ms126)?
Mission Hills Apartments - Essex (Ms126) is at 264 Rancho Del Oro Dr, Oceanside, in Oceanside, California 92057. Its coordinates are 33.22277, -117.31955 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Mission Hills Apartments - Essex (Ms126) and when was it built?
Mission Hills Apartments - Essex (Ms126) has 279,660 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1984 as its year built. It is classed as multifamily housing.
Is Mission Hills Apartments - Essex (Ms126) 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, “Mission Hills Apartments - Essex (Ms126), Oceanside, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/mission-hills-apartments-essex-ms126-8f4be2d8 (data as of July 9, 2026).