43 Discovery
Office in California, CA · 43 Discovery, Irvine · 92618
At a glance
43 Discovery is a 62,814-square-foot office building at 43 Discovery, Irvine in Irvine, California, built in 2000. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 90 out of 100 (grade A), a site energy-use intensity of 28.0 kBtu/ft² and 112 tCO₂e of greenhouse-gas emissions. That score is higher than 64% 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 | 90 (band A) |
| Site EUI | 28.0 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 112 tCO₂e |
| GHG intensity | 1.8 kgCO₂e/ft² |
| Electricity | 420,590 kWh |
| Natural gas | 3,068 therms |
| Gross floor area | 62,814 sq ft |
| Source record | california:1783736:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 90 | +2 | 28.0 kBtu/ft² | 112 tCO₂e |
| 2023 | 88 | +6 | 36.6 kBtu/ft² | 148 tCO₂e |
| 2022 | 82 | -2 | 41.4 kBtu/ft² | 159 tCO₂e |
| 2021 | 84 | +2 | 36.4 kBtu/ft² | 132 tCO₂e |
| 2020 | 82 | +18 | 53.3 kBtu/ft² | 206 tCO₂e |
| 2019 | 64 | 71.8 kBtu/ft² | 287 tCO₂e | |
| 2018 | — | 49.5 kBtu/ft² | 192 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
- 43 Discovery, Irvine
- City
- California
- State
- California
- ZIP
- 92618
- Coordinates
- 33.66693, -117.75704
Within ~1 km
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- 58 Discoveryscore —
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See also: most efficient in California · biggest emitters
How does 43 Discovery compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 43 Discovery's ENERGY STAR score of 90 compares with an average of 75 across the 4,912 that report a score; it scores higher than 64% of them and lower than 34%. Its site EUI of 28.0 kBtu/ft² is about half of 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 1.8 kgCO₂e/ft² is about half of the group average of 3.6 kgCO₂e/ft².
At 62,814 sq ft, it is about 59% below the average floor area of 151,937 sq ft for those buildings. It was built in 2000, 15 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 43 Discovery's energy performance changed over time?
BuildingCensus holds 7 California disclosures for 43 Discovery, covering report years 2018–2024. Its ENERGY STAR score went from 64 in 2019 to 90 in 2024 (+26 points). Site EUI moved from 49.5 kBtu/ft² (2018) to 28.0 kBtu/ft² (2024), a 43% decrease. Reported emissions went from 192 tCO₂e to 112 tCO₂e over the same span (down 42%).
What does an ENERGY STAR score of 90 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 90 means the building performs better than about 90% of its national peers. BuildingCensus bands the score into report-card grades; 90 falls in band A — high performer (85–100). 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. 43 Discovery's 28.0 kBtu/ft² across 62,814 sq ft works out to about 1.8 billion Btu (515 MWh-equivalent) in 2024. The disclosure also reports 420,590 kWh of electricity and 3,068 therms of natural gas for the year.
Which law requires 43 Discovery to report its energy use?
43 Discovery 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:1783736:2024). 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
- 4850 Eastgate (Eastgate Summit)· 62,805 sq ft · score 46 (D)
- District Office, 2310 Aldergrove Avenue, Escondido· 62,801 sq ft · EUI 49.6 kBtu/ft²
- 9272 Jeronimo· 62,795 sq ft · score 86 (A)
- Sacramento Hq 28Th && Broadway (Leased)· 62,784 sq ft · score 5 (D)
- Empresa Corporate Plaza· 62,774 sq ft · score 80 (B)
- Brentwood-Saltair· 62,768 sq ft · score 96 (A)
- 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 43 Discovery's energy grade?
43 Discovery scores 90 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 43 Discovery use?
Its 2024 site energy-use intensity was 28.0 kBtu/ft² across 62,814 sq ft, including 420,590 kWh of electricity and 3,068 therms of natural gas.
What are 43 Discovery's carbon emissions?
43 Discovery reported 112 tCO₂e of greenhouse-gas emissions (1.8 kgCO₂e/ft²) for 2024.
Where is 43 Discovery?
43 Discovery is at 43 Discovery, Irvine, in Irvine, California 92618. Its coordinates are 33.66693, -117.75704 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 43 Discovery and when was it built?
43 Discovery has 62,814 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2000 as its year built. It is classed as office.
Is 43 Discovery 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, “43 Discovery, Irvine, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/43-discovery-6d78574a (data as of July 9, 2026).