Homestead High School
K-12 School in California, CA · 21370 Homestead Rd., Cupertino · 95014
At a glance
Homestead High School is a 249,509-square-foot K-12 school at 21370 Homestead Rd., Cupertino in Cupertino, California, built in 1960. In its 2023 California benchmarking disclosure it reported an ENERGY STAR score of 41 out of 100 (grade D), a site energy-use intensity of 80.7 kBtu/ft² and 1,221 tCO₂e of greenhouse-gas emissions. That score is higher than 10% 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 | 41 (band D) |
| Site EUI | 80.7 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 1,221 tCO₂e |
| GHG intensity | 4.9 kgCO₂e/ft² |
| Electricity | 1,564,977 kWh |
| Natural gas | 115,332 therms |
| Gross floor area | 249,509 sq ft |
| Source record | california:6765951:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 41 | -43 | 80.7 kBtu/ft² | 1,221 tCO₂e |
| 2022 | 84 | +43 | 58.1 kBtu/ft² | 860 tCO₂e |
| 2018 | 41 | 65.3 kBtu/ft² | 1,173 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
- 21370 Homestead Rd., Cupertino
- City
- California
- State
- California
- ZIP
- 95014
- Coordinates
- 37.33468, -122.04657
Within ~1 km
Nearby benchmarked buildings
- Markham: Markhamscore 77
Multifamily Housing · 446,040 sq ft
- Shoppes At Homestead/ 634score —
Strip Mall · 116,109 sq ft
- Village Green Apartments (Vg64)score 100
Multifamily Housing · 108,669 sq ft
See also: most efficient in California · biggest emitters
How does Homestead High School 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. Homestead High School's ENERGY STAR score of 41 compares with an average of 74 across the 2,016 that report a score; it scores higher than 10% of them and lower than 89%. Its site EUI of 80.7 kBtu/ft² is about 133% 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 4.9 kgCO₂e/ft² is about 145% above the group average of 2.0 kgCO₂e/ft².
At 249,509 sq ft, it is about twice the average floor area of 129,123 sq ft for those buildings. It was built in 1960, 16 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 Homestead High School's energy performance changed over time?
BuildingCensus holds 3 California disclosures for Homestead High School, covering report years 2018, 2022, 2023. Its ENERGY STAR score was 41 in both 2018 and 2023. Site EUI moved from 65.3 kBtu/ft² (2018) to 80.7 kBtu/ft² (2023), an 24% increase. Reported emissions went from 1,173 tCO₂e to 1,221 tCO₂e over the same span (up 4%).
What does an ENERGY STAR score of 41 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 41 means the building performs better than about 41% of its national peers. BuildingCensus bands the score into report-card grades; 41 falls in band D — lowest band (1–54). It sits 34 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. Homestead High School's 80.7 kBtu/ft² across 249,509 sq ft works out to about 20.1 billion Btu (5,901 MWh-equivalent) in 2023. The disclosure also reports 1,564,977 kWh of electricity and 115,332 therms of natural gas for the year.
Which law requires Homestead High School to report its energy use?
Homestead High School 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:6765951:2023). 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
- Folsom High School· 249,412 sq ft · score 34 (D)
- Modesto High School· 249,139 sq ft · score 85 (A)
- Armijo High School· 248,537 sq ft · score 99 (A)
- El Toro High· 248,452 sq ft · score 69 (C)
- Oak Ridge High School· 248,407 sq ft · score 99 (A)
- Fremont High School· 248,192 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 Homestead High School's energy grade?
Homestead High School scores 41 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 Homestead High School use?
Its 2023 site energy-use intensity was 80.7 kBtu/ft² across 249,509 sq ft, including 1,564,977 kWh of electricity and 115,332 therms of natural gas.
What are Homestead High School's carbon emissions?
Homestead High School reported 1,221 tCO₂e of greenhouse-gas emissions (4.9 kgCO₂e/ft²) for 2023.
Where is Homestead High School?
Homestead High School is at 21370 Homestead Rd., Cupertino, in Cupertino, California 95014. Its coordinates are 37.33468, -122.04657 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Homestead High School and when was it built?
Homestead High School has 249,509 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1960 as its year built. It is classed as K-12 school.
Is Homestead High School 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).
Working with California building benchmarking records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Homestead High School, Cupertino, California — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/california/homestead-high-school-95ee7243 (data as of July 9, 2026).