6059 Cornerstone Court West
Office in California, CA · 6059 Cornerstone Ct W, San Diego · 92121
At a glance
6059 Cornerstone Court West is a 50,600-square-foot office building at 6059 Cornerstone Ct W, San Diego in San Diego, California, built in 1987. In its 2019 California benchmarking disclosure it reported an ENERGY STAR score of 78 out of 100 (grade B), a site energy-use intensity of 52.6 kBtu/ft² and 172 tCO₂e of greenhouse-gas emissions. That score is higher than 39% of the 4,912 scored office buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2019
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 78 (band B) |
| Site EUI | 52.6 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 172 tCO₂e |
| GHG intensity | 3.4 kgCO₂e/ft² |
| Electricity | 716,182 kWh |
| Natural gas | 1,867 therms |
| Gross floor area | 50,600 sq ft |
| Source record | california:11532679:2019 |
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
- 6059 Cornerstone Ct W, San Diego
- City
- California
- State
- California
- ZIP
- 92121
- Coordinates
- 32.89696, -117.18995
Within ~1 km
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See also: most efficient in California · biggest emitters
How does 6059 Cornerstone Court West compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 6059 Cornerstone Court West's ENERGY STAR score of 78 compares with an average of 75 across the 4,912 that report a score; it scores higher than 39% of them and lower than 59%. Its site EUI of 52.6 kBtu/ft² is roughly in line with 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 3.4 kgCO₂e/ft² is roughly in line with the group average of 3.6 kgCO₂e/ft².
At 50,600 sq ft, it is about 67% below the average floor area of 151,937 sq ft for those buildings. Its 1987 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.
What does an ENERGY STAR score of 78 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 78 means the building performs better than about 78% of its national peers. BuildingCensus bands the score into report-card grades; 78 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. 6059 Cornerstone Court West's 52.6 kBtu/ft² across 50,600 sq ft works out to about 2.7 billion Btu (780 MWh-equivalent) in 2019. The disclosure also reports 716,182 kWh of electricity and 1,867 therms of natural gas for the year.
Which law requires 6059 Cornerstone Court West to report its energy use?
6059 Cornerstone Court West 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 2019 disclosure (source record california:11532679:2019). 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
- Bayside Office Space And Warehouse· 50,593 sq ft
- 901 Liberty Station· 50,568 sq ft · score 85 (A)
- Bakersfield (Gateway) (State Owned) No P· 50,563 sq ft · EUI 41.9 kBtu/ft²
- 15770 Laguna Canyon Road· 50,562 sq ft · score 75 (B)
- 3775 N. Freeway· 50,551 sq ft · EUI 38.7 kBtu/ft²
- 1902 - Wright Place· 50,547 sq ft · score 81 (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 6059 Cornerstone Court West's energy grade?
6059 Cornerstone Court West scores 78 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2019 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 6059 Cornerstone Court West use?
Its 2019 site energy-use intensity was 52.6 kBtu/ft² across 50,600 sq ft, including 716,182 kWh of electricity and 1,867 therms of natural gas.
What are 6059 Cornerstone Court West's carbon emissions?
6059 Cornerstone Court West reported 172 tCO₂e of greenhouse-gas emissions (3.4 kgCO₂e/ft²) for 2019.
Where is 6059 Cornerstone Court West?
6059 Cornerstone Court West is at 6059 Cornerstone Ct W, San Diego, in San Diego, California 92121. Its coordinates are 32.89696, -117.18995 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 6059 Cornerstone Court West and when was it built?
6059 Cornerstone Court West has 50,600 sq ft of gross floor area, as reported in its 2019 disclosure. The disclosure lists 1987 as its year built. It is classed as office.
Is 6059 Cornerstone Court West covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2019 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, “6059 Cornerstone Court West, San Diego, California — 2019 benchmarking disclosure”, https://buildingcensus.com/buildings/california/6059-cornerstone-court-west-6a2da6eb (data as of July 9, 2026).