1 Park Plaza
Office in California, CA · 1 Park Plaza, Irvine · 92614
At a glance
1 Park Plaza is a 235,925-square-foot office building at 1 Park Plaza, Irvine in Irvine, California, built in 1985. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 80 out of 100 (grade B), a site energy-use intensity of 37.7 kBtu/ft² and 590 tCO₂e of greenhouse-gas emissions. That score is higher than 42% 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 | 80 (band B) |
| Site EUI | 37.7 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 590 tCO₂e |
| GHG intensity | 2.5 kgCO₂e/ft² |
| Electricity | 2,607,620 kWh |
| Gross floor area | 235,925 sq ft |
| Source record | california:1590156:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 80 | +5 | 37.7 kBtu/ft² | 590 tCO₂e |
| 2023 | 75 | +4 | 41.2 kBtu/ft² | 689 tCO₂e |
| 2022 | 71 | -3 | 40.2 kBtu/ft² | 650 tCO₂e |
| 2021 | 74 | -1 | 38.9 kBtu/ft² | 555 tCO₂e |
| 2020 | 75 | -6 | 37.4 kBtu/ft² | 585 tCO₂e |
| 2019 | 81 | -3 | 42.0 kBtu/ft² | 698 tCO₂e |
| 2018 | 84 | 40.2 kBtu/ft² | 668 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
- 1 Park Plaza, Irvine
- City
- California
- State
- California
- ZIP
- 92614
- Coordinates
- 33.67971, -117.83966
Within ~1 km
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- 3161 Michelson Drivescore 92
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- 3161 Michelson Drivescore 90
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See also: most efficient in California · biggest emitters
How does 1 Park Plaza compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 1 Park Plaza's ENERGY STAR score of 80 compares with an average of 75 across the 4,912 that report a score; it scores higher than 42% of them and lower than 56%. Its site EUI of 37.7 kBtu/ft² is about 33% 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 2.5 kgCO₂e/ft² is about 31% below the group average of 3.6 kgCO₂e/ft².
At 235,925 sq ft, it is about 55% above the average floor area of 151,937 sq ft for those buildings. Its 1985 construction date is close to 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 1 Park Plaza's energy performance changed over time?
BuildingCensus holds 7 California disclosures for 1 Park Plaza, covering report years 2018–2024. Its ENERGY STAR score went from 84 in 2018 to 80 in 2024 (-4 points); its best year on file was 2018, at 84. Site EUI moved from 40.2 kBtu/ft² (2018) to 37.7 kBtu/ft² (2024), a 6% decrease. Reported emissions went from 668 tCO₂e to 590 tCO₂e over the same span (down 12%).
What does an ENERGY STAR score of 80 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 80 means the building performs better than about 80% of its national peers. BuildingCensus bands the score into report-card grades; 80 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. 1 Park Plaza's 37.7 kBtu/ft² across 235,925 sq ft works out to about 8.9 billion Btu (2,607 MWh-equivalent) in 2024. The disclosure also reports 2,607,620 kWh of electricity for the year.
Which law requires 1 Park Plaza to report its energy use?
1 Park Plaza 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:1590156:2024). 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
- 04390 - Administration Building· 235,898 sq ft · score 77 (B)
- Smith Research Tower (Chla)· 235,484 sq ft · score 31 (D)
- Comerica Bank Building· 234,935 sq ft · score 63 (C)
- Warner Center Plaza 2· 234,781 sq ft · score 83 (B)
- 3098 Olsen Drive· 234,622 sq ft · score 88 (A)
- 150 California Street· 234,494 sq ft · score 79 (B)
- 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 1 Park Plaza's energy grade?
1 Park Plaza scores 80 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 1 Park Plaza use?
Its 2024 site energy-use intensity was 37.7 kBtu/ft² across 235,925 sq ft, including 2,607,620 kWh of electricity.
What are 1 Park Plaza's carbon emissions?
1 Park Plaza reported 590 tCO₂e of greenhouse-gas emissions (2.5 kgCO₂e/ft²) for 2024.
Where is 1 Park Plaza?
1 Park Plaza is at 1 Park Plaza, Irvine, in Irvine, California 92614. Its coordinates are 33.67971, -117.83966 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 1 Park Plaza and when was it built?
1 Park Plaza has 235,925 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1985 as its year built. It is classed as office.
Is 1 Park Plaza 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, “1 Park Plaza, Irvine, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/1-park-plaza-f1e47620 (data as of July 9, 2026).