Estancia High
K-12 School in California, CA · 2323 Placentia Avenue, Costa Mesa · 92627
At a glance
Estancia High is a 204,462-square-foot K-12 school at 2323 Placentia Avenue, Costa Mesa in Costa Mesa, California, built in 1966. In its 2023 California benchmarking disclosure it reported an ENERGY STAR score of 37 out of 100 (grade D), a site energy-use intensity of 84.5 kBtu/ft² and 897 tCO₂e of greenhouse-gas emissions. That score is higher than 8% of the 2,016 scored K-12 school buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 37 (band D) |
| Site EUI | 84.5 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 897 tCO₂e |
| GHG intensity | 4.4 kgCO₂e/ft² |
| Electricity | 1,212,024 kWh |
| Natural gas | 113,620 therms |
| Gross floor area | 204,462 sq ft |
| Source record | california:1971847:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 37 | -21 | 84.5 kBtu/ft² | 897 tCO₂e |
| 2022 | 58 | 84.2 kBtu/ft² | 734 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
- 2323 Placentia Avenue, Costa Mesa
- City
- California
- State
- California
- ZIP
- 92627
- Coordinates
- 36.77826, -119.41793
Within ~1 km
Nearby benchmarked buildings
- Sba04101 - Sfo 7score 84
Distribution Center · 309,873 sq ft
- Costa Mesa Highscore 49
K-12 School · 213,078 sq ft
- Tewinkle Intermediatescore 90
K-12 School · 84,385 sq ft
- Davis Magnet Schoolscore 99
K-12 School · 70,579 sq ft
- Rea Elementaryscore 99
K-12 School · 62,252 sq ft
- Whittier Elementaryscore 96
K-12 School · 61,012 sq ft
See also: most efficient in California · biggest emitters
How does Estancia High compare with other K-12 school buildings in California?
The latest disclosures cover 2,128 K-12 school buildings in California, out of 40,029 buildings citywide. Estancia High's ENERGY STAR score of 37 compares with an average of 74 across the 2,016 that report a score; it scores higher than 8% of them and lower than 91%. Its site EUI of 84.5 kBtu/ft² is about 144% above the average of 34.6 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 4.4 kgCO₂e/ft² is about 120% above the group average of 2.0 kgCO₂e/ft².
At 204,462 sq ft, it is about 58% above the average floor area of 129,123 sq ft for those buildings. It was built in 1966, 10 years earlier than the group's average year built (1976). Across all 24 jurisdictions BuildingCensus covers, the 6,548 K-12 school buildings average an ENERGY STAR score of 64 and a site EUI of 52.7 kBtu/ft².
How has Estancia High's energy performance changed over time?
BuildingCensus holds 2 California disclosures for Estancia High, covering report years 2022–2023. Its ENERGY STAR score went from 58 in 2022 to 37 in 2023 (-21 points); its best year on file was 2022, at 58. Site EUI moved from 84.2 kBtu/ft² (2022) to 84.5 kBtu/ft² (2023), an 0% increase. Reported emissions went from 734 tCO₂e to 897 tCO₂e over the same span (up 22%).
What does an ENERGY STAR score of 37 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 37 means the building performs better than about 37% of its national peers. BuildingCensus bands the score into report-card grades; 37 falls in band D — lowest band (1–54). It sits 38 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. Estancia High's 84.5 kBtu/ft² across 204,462 sq ft works out to about 17.3 billion Btu (5,063 MWh-equivalent) in 2023. The disclosure also reports 1,212,024 kWh of electricity and 113,620 therms of natural gas for the year.
Which law requires Estancia High to report its energy use?
Estancia High 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:1971847:2023). 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 K-12 school buildings in California
- Laguna Hills High· 203,482 sq ft · score 60 (C)
- Kennedy High School· 202,917 sq ft · score 100 (A)
- Hanford West High School· 201,846 sq ft · score 73 (B)
- Littlerock High School· 201,085 sq ft · score 92 (A)
- Tulare Western High School· 201,031 sq ft · score 90 (A)
- Emuhsd El Monte High School· 201,000 sq ft · score 91 (A)
- K-12 School buildings in California· 2,128 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 Estancia High's energy grade?
Estancia High scores 37 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2023 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Estancia High use?
Its 2023 site energy-use intensity was 84.5 kBtu/ft² across 204,462 sq ft, including 1,212,024 kWh of electricity and 113,620 therms of natural gas.
What are Estancia High's carbon emissions?
Estancia High reported 897 tCO₂e of greenhouse-gas emissions (4.4 kgCO₂e/ft²) for 2023.
Where is Estancia High?
Estancia High is at 2323 Placentia Avenue, Costa Mesa, in Costa Mesa, California 92627. Its coordinates are 36.77826, -119.41793 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Estancia High and when was it built?
Estancia High has 204,462 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1966 as its year built. It is classed as K-12 school.
Is Estancia High 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, “Estancia High, Costa Mesa, California — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/california/estancia-high-bac58a33 (data as of July 9, 2026).