Olen Corporate Plaza
Office in California, CA · 20 Corporate Park, Irvine · 92606
At a glance
Olen Corporate Plaza is a 57,194-square-foot office building at 20 Corporate Park, Irvine in Irvine, California, built in 1989. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 69 out of 100 (grade C), a site energy-use intensity of 43.8 kBtu/ft² and 159 tCO₂e of greenhouse-gas emissions. That score is higher than 29% 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 | 69 (band C) |
| Site EUI | 43.8 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 159 tCO₂e |
| GHG intensity | 2.8 kgCO₂e/ft² |
| Electricity | 701,996 kWh |
| Gross floor area | 57,194 sq ft |
| Source record | california:26000913:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 69 | -6 | 43.8 kBtu/ft² | 159 tCO₂e |
| 2023 | 75 | ±0 | 37.7 kBtu/ft² | 154 tCO₂e |
| 2022 | 75 | 35.1 kBtu/ft² | 149 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
- 20 Corporate Park, Irvine
- City
- California
- State
- California
- ZIP
- 92606
- Coordinates
- 33.68983, -117.83036
Within ~1 km
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See also: most efficient in California · biggest emitters
How does Olen Corporate Plaza compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. Olen Corporate Plaza's ENERGY STAR score of 69 compares with an average of 75 across the 4,912 that report a score; it scores higher than 29% of them and lower than 70%. Its site EUI of 43.8 kBtu/ft² is about 22% 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 2.8 kgCO₂e/ft² is about 23% below the group average of 3.6 kgCO₂e/ft².
At 57,194 sq ft, it is about 62% below the average floor area of 151,937 sq ft for those buildings. It was built in 1989, 4 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 Olen Corporate Plaza's energy performance changed over time?
BuildingCensus holds 3 California disclosures for Olen Corporate Plaza, covering report years 2022–2024. Its ENERGY STAR score went from 75 in 2022 to 69 in 2024 (-6 points); its best year on file was 2022, at 75. Site EUI moved from 35.1 kBtu/ft² (2022) to 43.8 kBtu/ft² (2024), an 25% increase. Reported emissions went from 149 tCO₂e to 159 tCO₂e over the same span (up 7%).
What does an ENERGY STAR score of 69 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 69 means the building performs better than about 69% of its national peers. BuildingCensus bands the score into report-card grades; 69 falls in band C — below median (55–69). It sits 6 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. Olen Corporate Plaza's 43.8 kBtu/ft² across 57,194 sq ft works out to about 2.5 billion Btu (734 MWh-equivalent) in 2024. The disclosure also reports 701,996 kWh of electricity for the year.
Which law requires Olen Corporate Plaza to report its energy use?
Olen Corporate 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:26000913:2024). 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
- 10769 Hole Ave· 57,189 sq ft · score 95 (A)
- Long Beach (Csms) (State Owned) No P· 57,182 sq ft · EUI 44.0 kBtu/ft²
- Riverside Gateway Ii· 57,154 sq ft · score 80 (B)
- 4283, 4283 El Cajon Boulevard, San Diego· 57,136 sq ft · score 93 (A)
- 17323 Ventura Blvd· 57,103 sq ft · score 100 (A)
- Smbp - Building S· 57,102 sq ft · score 47 (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 Olen Corporate Plaza's energy grade?
Olen Corporate Plaza scores 69 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 Olen Corporate Plaza use?
Its 2024 site energy-use intensity was 43.8 kBtu/ft² across 57,194 sq ft, including 701,996 kWh of electricity.
What are Olen Corporate Plaza's carbon emissions?
Olen Corporate Plaza reported 159 tCO₂e of greenhouse-gas emissions (2.8 kgCO₂e/ft²) for 2024.
Where is Olen Corporate Plaza?
Olen Corporate Plaza is at 20 Corporate Park, Irvine, in Irvine, California 92606. Its coordinates are 33.68983, -117.83036 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Olen Corporate Plaza and when was it built?
Olen Corporate Plaza has 57,194 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1989 as its year built. It is classed as office.
Is Olen Corporate 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, “Olen Corporate Plaza, Irvine, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/olen-corporate-plaza-ef33a321 (data as of July 9, 2026).