Oso Grande Es
K-12 School in California, CA · 30251 Sienna Pkwy., Ladera Ranch · 92694
At a glance
Oso Grande Es is a 57,351-square-foot K-12 school at 30251 Sienna Pkwy., Ladera Ranch in Ladera Ranch, California, built in 1910. In its 2024 California benchmarking disclosure it reported a site energy-use intensity of 28.9 kBtu/ft² and 111 tCO₂e of greenhouse-gas emissions.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 28.9 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 111 tCO₂e |
| GHG intensity | 1.9 kgCO₂e/ft² |
| Electricity | 473,043 kWh |
| Natural gas | 708 therms |
| Gross floor area | 57,351 sq ft |
| Source record | california:14307625:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 28.9 kBtu/ft² | 111 tCO₂e | |
| 2023 | — | 27.7 kBtu/ft² | 111 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
- 30251 Sienna Pkwy., Ladera Ranch
- City
- California
- State
- California
- ZIP
- 92694
- Coordinates
- 33.54423, -117.63851
Within ~1 km
Nearby benchmarked buildings
No other benchmarked buildings within ~1 km.
See also: most efficient in California · biggest emitters
How does Oso Grande Es 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. Its site EUI of 28.9 kBtu/ft² is about 16% below the average of 34.6 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 1.9 kgCO₂e/ft² is roughly in line with the group average of 2.0 kgCO₂e/ft².
At 57,351 sq ft, it is about 56% below the average floor area of 129,123 sq ft for those buildings. It was built in 1910, 66 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 Oso Grande Es's energy performance changed over time?
BuildingCensus holds 2 California disclosures for Oso Grande Es, covering report years 2023–2024. Site EUI moved from 27.7 kBtu/ft² (2023) to 28.9 kBtu/ft² (2024), an 4% increase. Reported emissions went from 111 tCO₂e to 111 tCO₂e over the same span (down 0%).
What does a site EUI of 28.9 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. Oso Grande Es's 28.9 kBtu/ft² across 57,351 sq ft works out to about 1.7 billion Btu (486 MWh-equivalent) in 2024. The disclosure also reports 473,043 kWh of electricity and 708 therms of natural gas for the year.
Which law requires Oso Grande Es to report its energy use?
Oso Grande Es 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:14307625:2024). 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 K-12 school buildings in California
- Doig Intermediate School· 57,322 sq ft · score 81 (B)
- Bishop Ranch 12 A· 57,318 sq ft · score 74 (B)
- De Anza Middle School· 57,313 sq ft · score 97 (A)
- Willard Elementary· 57,305 sq ft · score 93 (A)
- Vista Verde Elementary Shool· 57,261 sq ft · score 90 (A)
- Valley View Charter Montessori· 57,239 sq ft · score 100 (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 Oso Grande Es's energy grade?
Oso Grande Es did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 28.9 kBtu/ft².
How much energy does Oso Grande Es use?
Its 2024 site energy-use intensity was 28.9 kBtu/ft² across 57,351 sq ft, including 473,043 kWh of electricity and 708 therms of natural gas.
What are Oso Grande Es's carbon emissions?
Oso Grande Es reported 111 tCO₂e of greenhouse-gas emissions (1.9 kgCO₂e/ft²) for 2024.
Where is Oso Grande Es?
Oso Grande Es is at 30251 Sienna Pkwy., Ladera Ranch, in Ladera Ranch, California 92694. Its coordinates are 33.54423, -117.63851 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Oso Grande Es and when was it built?
Oso Grande Es has 57,351 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1910 as its year built. It is classed as K-12 school.
Is Oso Grande Es 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, “Oso Grande Es, Ladera Ranch, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/oso-grande-es-e6693f40 (data as of July 9, 2026).