1921 E Alton Avenue
Office in California, CA · 1921 East Alton Avenue, Santa Ana · 92705
At a glance
1921 E Alton Avenue is a 67,846-square-foot office building at 1921 East Alton Avenue, Santa Ana in Santa Ana, California, built in 1970. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 83 out of 100 (grade B), a site energy-use intensity of 33.1 kBtu/ft² and 149 tCO₂e of greenhouse-gas emissions. That score is higher than 48% of the 4,912 scored office buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 83 (band B) |
| Site EUI | 33.1 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 149 tCO₂e |
| GHG intensity | 2.2 kgCO₂e/ft² |
| Electricity | 658,870 kWh |
| Gross floor area | 67,846 sq ft |
| Source record | california:34656922:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 83 | +7 | 33.1 kBtu/ft² | 149 tCO₂e |
| 2023 | 76 | 38.5 kBtu/ft² | 185 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
- 1921 East Alton Avenue, Santa Ana
- City
- California
- State
- California
- ZIP
- 92705
- Coordinates
- 33.70285, -117.85023
Within ~1 km
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See also: most efficient in California · biggest emitters
How does 1921 E Alton Avenue compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 1921 E Alton Avenue's ENERGY STAR score of 83 compares with an average of 75 across the 4,912 that report a score; it scores higher than 48% of them and lower than 50%. Its site EUI of 33.1 kBtu/ft² is about 41% below the average of 56.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 2.2 kgCO₂e/ft² is about 39% below the group average of 3.6 kgCO₂e/ft².
At 67,846 sq ft, it is about 55% below the average floor area of 151,937 sq ft for those buildings. It was built in 1970, 15 years earlier than the group's average year built (1985). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has 1921 E Alton Avenue's energy performance changed over time?
BuildingCensus holds 2 California disclosures for 1921 E Alton Avenue, covering report years 2023–2024. Its ENERGY STAR score went from 76 in 2023 to 83 in 2024 (+7 points). Site EUI moved from 38.5 kBtu/ft² (2023) to 33.1 kBtu/ft² (2024), a 14% decrease. Reported emissions went from 185 tCO₂e to 149 tCO₂e over the same span (down 19%).
What does an ENERGY STAR score of 83 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 83 means the building performs better than about 83% of its national peers. BuildingCensus bands the score into report-card grades; 83 falls in band B — above median (70–84). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. 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. 1921 E Alton Avenue's 33.1 kBtu/ft² across 67,846 sq ft works out to about 2.2 billion Btu (658 MWh-equivalent) in 2024. The disclosure also reports 658,870 kWh of electricity for the year.
Which law requires 1921 E Alton Avenue to report its energy use?
1921 E Alton Avenue 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:34656922:2024). 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 office buildings in California
- 1400 Shamrock Avenue (Ab 802 Rexford)· 67,838 sq ft · score 27 (D)
- Bmr-5717 Pac Center· 67,832 sq ft · score 54 (D)
- 149 New Montgomery· 67,807 sq ft · EUI 69.2 kBtu/ft²
- 1101 Fifth Avenue· 67,755 sq ft · score 27 (D)
- Encino Gardens· 67,743 sq ft · EUI 110.3 kBtu/ft²
- 100 Redwood Shores Parkway - Opi· 67,721 sq ft · score 9 (D)
- Office buildings in California· 6,214 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 1921 E Alton Avenue's energy grade?
1921 E Alton Avenue scores 83 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 1921 E Alton Avenue use?
Its 2024 site energy-use intensity was 33.1 kBtu/ft² across 67,846 sq ft, including 658,870 kWh of electricity.
What are 1921 E Alton Avenue's carbon emissions?
1921 E Alton Avenue reported 149 tCO₂e of greenhouse-gas emissions (2.2 kgCO₂e/ft²) for 2024.
Where is 1921 E Alton Avenue?
1921 E Alton Avenue is at 1921 East Alton Avenue, Santa Ana, in Santa Ana, California 92705. Its coordinates are 33.70285, -117.85023 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 1921 E Alton Avenue and when was it built?
1921 E Alton Avenue has 67,846 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1970 as its year built. It is classed as office.
Is 1921 E Alton Avenue 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, “1921 E Alton Avenue, Santa Ana, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/1921-e-alton-avenue-fd98b5bd (data as of July 9, 2026).