26541 Rancho Parkway South
Office in California, CA · 26541 Rancho Parkway South, Lake Forest · 92630
At a glance
26541 Rancho Parkway South is a 60,720-square-foot office building at 26541 Rancho Parkway South, Lake Forest in Lake Forest, California, built in 2002. In its 2018 California benchmarking disclosure it reported an ENERGY STAR score of 36 out of 100 (grade D), a site energy-use intensity of 108.6 kBtu/ft² and 463 tCO₂e of greenhouse-gas emissions. That score is higher than 11% of the 4,912 scored office buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2018
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 36 (band D) |
| Site EUI | 108.6 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 463 tCO₂e |
| GHG intensity | 7.6 kgCO₂e/ft² |
| Electricity | 1,902,623 kWh |
| Natural gas | 1,051 therms |
| Gross floor area | 60,720 sq ft |
| Source record | california:4366388:2018 |
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.
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Location
- Address
- 26541 Rancho Parkway South, Lake Forest
- City
- California
- State
- California
- ZIP
- 92630
- Coordinates
- 33.67360, -117.67036
Within ~1 km
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See also: most efficient in California · biggest emitters
How does 26541 Rancho Parkway South compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 26541 Rancho Parkway South's ENERGY STAR score of 36 compares with an average of 75 across the 4,912 that report a score; it scores higher than 11% of them and lower than 89%. Its site EUI of 108.6 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 60,720 sq ft, it is about 60% below the average floor area of 151,937 sq ft for those buildings. It was built in 2002, 17 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.
What does an ENERGY STAR score of 36 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 36 means the building performs better than about 36% of its national peers. BuildingCensus bands the score into report-card grades; 36 falls in band D — lowest band (1–54). It sits 39 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. 26541 Rancho Parkway South's 108.6 kBtu/ft² across 60,720 sq ft works out to about 6.6 billion Btu (1,933 MWh-equivalent) in 2018. The disclosure also reports 1,902,623 kWh of electricity and 1,051 therms of natural gas for the year.
Which law requires 26541 Rancho Parkway South to report its energy use?
26541 Rancho Parkway South 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 2018 disclosure (source record california:4366388:2018). 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)
- Most efficient large buildings in California
- Least efficient large buildings in California
- Biggest emitters in California
Frequently asked questions
What is 26541 Rancho Parkway South's energy grade?
26541 Rancho Parkway South scores 36 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2018 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 26541 Rancho Parkway South use?
Its 2018 site energy-use intensity was 108.6 kBtu/ft² across 60,720 sq ft, including 1,902,623 kWh of electricity and 1,051 therms of natural gas.
What are 26541 Rancho Parkway South's carbon emissions?
26541 Rancho Parkway South reported 463 tCO₂e of greenhouse-gas emissions (7.6 kgCO₂e/ft²) for 2018.
Where is 26541 Rancho Parkway South?
26541 Rancho Parkway South is at 26541 Rancho Parkway South, Lake Forest, in Lake Forest, California 92630. Its coordinates are 33.67360, -117.67036 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 26541 Rancho Parkway South and when was it built?
26541 Rancho Parkway South has 60,720 sq ft of gross floor area, as reported in its 2018 disclosure. The disclosure lists 2002 as its year built. It is classed as office.
Is 26541 Rancho Parkway South covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2018 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, “26541 Rancho Parkway South, Lake Forest, California — 2018 benchmarking disclosure”, https://buildingcensus.com/buildings/california/26541-rancho-parkway-south-ae0cd345 (data as of July 9, 2026).