Helix Charter High School
K-12 School in California, CA · 7323 Univ Ave., La Mesa · 91941
At a glance
Helix Charter High School is a 300,000-square-foot K-12 school at 7323 Univ Ave., La Mesa in La Mesa, California, built in 1952. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 62 out of 100 (grade C), a site energy-use intensity of 50.6 kBtu/ft² and 1,022 tCO₂e of greenhouse-gas emissions. That score is higher than 25% of the 2,016 scored K-12 school buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 62 (band C) |
| Site EUI | 50.6 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 1,022 tCO₂e |
| GHG intensity | 3.4 kgCO₂e/ft² |
| Electricity | 1,323,468 kWh |
| Natural gas | 48,733 therms |
| Gross floor area | 300,000 sq ft |
| Source record | california:29309642:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 62 | +6 | 50.6 kBtu/ft² | 1,022 tCO₂e |
| 2023 | 56 | 52.9 kBtu/ft² | 1,071 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
- 7323 Univ Ave., La Mesa
- City
- California
- State
- California
- ZIP
- 91941
- Coordinates
- 32.75408, -117.03657
Within ~1 km
Nearby benchmarked buildings
No other benchmarked buildings within ~1 km.
See also: most efficient in California · biggest emitters
How does Helix Charter 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. Helix Charter High School's ENERGY STAR score of 62 compares with an average of 74 across the 2,016 that report a score; it scores higher than 25% of them and lower than 73%. Its site EUI of 50.6 kBtu/ft² is about 46% 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 3.4 kgCO₂e/ft² is about 71% above the group average of 2.0 kgCO₂e/ft².
At 300,000 sq ft, it is about 132% above the average floor area of 129,123 sq ft for those buildings. It was built in 1952, 24 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 Helix Charter High School's energy performance changed over time?
BuildingCensus holds 2 California disclosures for Helix Charter High School, covering report years 2023–2024. Its ENERGY STAR score went from 56 in 2023 to 62 in 2024 (+6 points). Site EUI moved from 52.9 kBtu/ft² (2023) to 50.6 kBtu/ft² (2024), a 4% decrease. Reported emissions went from 1,071 tCO₂e to 1,022 tCO₂e over the same span (down 5%).
What does an ENERGY STAR score of 62 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 62 means the building performs better than about 62% of its national peers. BuildingCensus bands the score into report-card grades; 62 falls in band C — below median (55–69). It sits 13 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. Helix Charter High School's 50.6 kBtu/ft² across 300,000 sq ft works out to about 15.2 billion Btu (4,449 MWh-equivalent) in 2024. The disclosure also reports 1,323,468 kWh of electricity and 48,733 therms of natural gas for the year.
Which law requires Helix Charter High School to report its energy use?
Helix Charter 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 2024 disclosure (source record california:29309642:2024). 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
- Deer Valley High School· 299,888 sq ft · score 46 (D)
- Rialto High School· 298,884 sq ft · score 28 (D)
- Fresno Hs· 298,433 sq ft · score 53 (D)
- Sanger West High School· 298,403 sq ft · score 100 (A)
- Mark Keppel High School· 297,331 sq ft · score 85 (A)
- California High· 297,256 sq ft · score 60 (C)
- 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 Helix Charter High School's energy grade?
Helix Charter High School scores 62 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Helix Charter High School use?
Its 2024 site energy-use intensity was 50.6 kBtu/ft² across 300,000 sq ft, including 1,323,468 kWh of electricity and 48,733 therms of natural gas.
What are Helix Charter High School's carbon emissions?
Helix Charter High School reported 1,022 tCO₂e of greenhouse-gas emissions (3.4 kgCO₂e/ft²) for 2024.
Where is Helix Charter High School?
Helix Charter High School is at 7323 Univ Ave., La Mesa, in La Mesa, California 91941. Its coordinates are 32.75408, -117.03657 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Helix Charter High School and when was it built?
Helix Charter High School has 300,000 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1952 as its year built. It is classed as K-12 school.
Is Helix Charter High School 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, “Helix Charter High School, La Mesa, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/helix-charter-high-school-99b6d741 (data as of July 9, 2026).