16205 Alton
Office in California, CA · 16205 Alton Parkway, Irvine · 92618
At a glance
16205 Alton is a 63,451-square-foot office building at 16205 Alton Parkway, Irvine in Irvine, California, built in 1995. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 17 out of 100 (grade D), a site energy-use intensity of 114.4 kBtu/ft² and 482 tCO₂e of greenhouse-gas emissions. That score is higher than 6% 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 | 17 (band D) |
| Site EUI | 114.4 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 482 tCO₂e |
| GHG intensity | 7.6 kgCO₂e/ft² |
| Electricity | 2,127,480 kWh |
| Gross floor area | 63,451 sq ft |
| Source record | california:3200642:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 17 | +6 | 114.4 kBtu/ft² | 482 tCO₂e |
| 2023 | 11 | -1 | 129.2 kBtu/ft² | 583 tCO₂e |
| 2022 | 12 | +1 | 123.4 kBtu/ft² | 550 tCO₂e |
| 2021 | 11 | +4 | 130.9 kBtu/ft² | 503 tCO₂e |
| 2020 | 7 | +5 | 143.5 kBtu/ft² | 604 tCO₂e |
| 2019 | 2 | 177.2 kBtu/ft² | 796 tCO₂e | |
| 2018 | — | — | — |
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
- 16205 Alton Parkway, Irvine
- City
- California
- State
- California
- ZIP
- 92618
- Coordinates
- 33.65801, -117.76656
Within ~1 km
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See also: most efficient in California · biggest emitters
How does 16205 Alton compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 16205 Alton's ENERGY STAR score of 17 compares with an average of 75 across the 4,912 that report a score; it scores higher than 6% of them and lower than 94%. Its site EUI of 114.4 kBtu/ft² is about twice the average of 56.4 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 7.6 kgCO₂e/ft² is about twice the group average of 3.6 kgCO₂e/ft².
At 63,451 sq ft, it is about 58% below the average floor area of 151,937 sq ft for those buildings. It was built in 1995, 10 years later 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 16205 Alton's energy performance changed over time?
BuildingCensus holds 7 California disclosures for 16205 Alton, covering report years 2018–2024. Its ENERGY STAR score went from 2 in 2019 to 17 in 2024 (+15 points). Site EUI moved from 177.2 kBtu/ft² (2019) to 114.4 kBtu/ft² (2024), a 35% decrease. Reported emissions went from 796 tCO₂e to 482 tCO₂e over the same span (down 39%).
What does an ENERGY STAR score of 17 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 17 means the building performs better than about 17% of its national peers. BuildingCensus bands the score into report-card grades; 17 falls in band D — lowest band (1–54). It sits 58 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. 16205 Alton's 114.4 kBtu/ft² across 63,451 sq ft works out to about 7.3 billion Btu (2,127 MWh-equivalent) in 2024. The disclosure also reports 2,127,480 kWh of electricity for the year.
Which law requires 16205 Alton to report its energy use?
16205 Alton 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:3200642:2024). 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.
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- Office buildings in California· 6,214 benchmarked
- All California benchmarked buildings· AB 802 (Public Resources Code §25402.10)
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- Least efficient large buildings in California
- Biggest emitters in California
Frequently asked questions
What is 16205 Alton's energy grade?
16205 Alton scores 17 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 16205 Alton use?
Its 2024 site energy-use intensity was 114.4 kBtu/ft² across 63,451 sq ft, including 2,127,480 kWh of electricity.
What are 16205 Alton's carbon emissions?
16205 Alton reported 482 tCO₂e of greenhouse-gas emissions (7.6 kgCO₂e/ft²) for 2024.
Where is 16205 Alton?
16205 Alton is at 16205 Alton Parkway, Irvine, in Irvine, California 92618. Its coordinates are 33.65801, -117.76656 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 16205 Alton and when was it built?
16205 Alton has 63,451 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1995 as its year built. It is classed as office.
Is 16205 Alton 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, “16205 Alton, Irvine, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/16205-alton-16ae2d6e (data as of July 9, 2026).