At a glance
6059 Cornerstone is a 51,690-square-foot office building at 6059 Cornerstone Court in San Diego, California, built in 1987. In its 2022 San Diego benchmarking disclosure it reported an ENERGY STAR score of 64 out of 100 (grade C) and a site energy-use intensity of 47.7 kBtu/ft². That score is higher than 22% of the 259 scored office buildings in San Diego.
Building Energy Benchmarking Ordinance (SDMC Ch. 14 Art. 12) · reporting year 2022
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 64 (band C) |
| Site EUI | 47.7 kBtu/ft² |
| Source EUI | — |
| GHG emissions | — |
| GHG intensity | — |
| Gross floor area | 51,690 sq ft |
| Source record | san_diego:100284:2022 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2022latest | 64 | +11 | 47.7 kBtu/ft² | — |
| 2021 | 53 | 48.7 kBtu/ft² | — |
Compliance context
Building Energy Benchmarking Ordinance (SDMC Ch. 14 Art. 12)
San Diego's ordinance requires annual benchmarking for commercial buildings over 50,000 sq ft, with civil penalties for buildings that fail to report.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 6059 Cornerstone Court
- City
- San Diego
- State
- California
- Coordinates
- 32.89636, -117.19001
Within ~1 km
Nearby benchmarked buildings
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- Qualcomm W/Wtscore 100
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- Qualcomm Pac Centerscore 1
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- 10020 Pacific Mesa Boulevardscore 47
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Self-Storage Facility · 144,595 sq ft
- Qualcomm Bcscore 16
Non-Refrigerated Warehouse · 141,776 sq ft
See also: most efficient in San Diego · biggest emitters
How does 6059 Cornerstone compare with other office buildings in San Diego?
The latest disclosures cover 356 office buildings in San Diego, out of 2,567 buildings citywide. 6059 Cornerstone's ENERGY STAR score of 64 compares with an average of 75 across the 259 that report a score; it scores higher than 22% of them and lower than 77%. Its site EUI of 47.7 kBtu/ft² is about 12% below the average of 54.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 51,690 sq ft, it is about 61% below the average floor area of 130,949 sq ft for those buildings. It was built in 1987, 4 years earlier than the group's average year built (1991). 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 6059 Cornerstone's energy performance changed over time?
BuildingCensus holds 2 San Diego disclosures for 6059 Cornerstone, covering report years 2021–2022. Its ENERGY STAR score went from 53 in 2021 to 64 in 2022 (+11 points). Site EUI moved from 48.7 kBtu/ft² (2021) to 47.7 kBtu/ft² (2022), a 2% decrease.
What does an ENERGY STAR score of 64 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 64 means the building performs better than about 64% of its national peers. BuildingCensus bands the score into report-card grades; 64 falls in band C — below median (55–69). It sits 11 points below 75, the threshold for ENERGY STAR certification. In San Diego, 73% 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's 47.7 kBtu/ft² across 51,690 sq ft works out to about 2.5 billion Btu (723 MWh-equivalent) in 2022.
Which law requires 6059 Cornerstone to report its energy use?
6059 Cornerstone reports under the Building Energy Benchmarking Ordinance (SDMC Ch. 14 Art. 12), the legal basis of San Diego's Building Energy Benchmarking program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2022 disclosure (source record san_diego:100284:2022). San Diego's ordinance requires annual benchmarking for commercial buildings over 50,000 sq ft, with civil penalties for buildings that fail to report.
More office buildings in San Diego
- Santo Road L.P.· 51,580 sq ft · score 96 (A)
- 15445 Innovation Drive· 51,500 sq ft · score 79 (B)
- Providence Chesapeake· 51,464 sq ft · EUI 25.5 kBtu/ft²
- Providence Chesapeake· 51,464 sq ft · score 93 (A)
- 4690 Executive - Kilroy University Centre· 51,371 sq ft · score 99 (A)
- Sterling City Science North Development (sb063)· 51,145 sq ft · score 89 (A)
- Office buildings in San Diego· 356 benchmarked
- All San Diego benchmarked buildings· Building Energy Benchmarking Ordinance (SDMC Ch. 14 Art. 12)
- Most efficient large buildings in San Diego
- Least efficient large buildings in San Diego
- Biggest emitters in San Diego
Frequently asked questions
What is 6059 Cornerstone's energy grade?
6059 Cornerstone scores 64 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2022 San Diego disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 6059 Cornerstone use?
Its 2022 site energy-use intensity was 47.7 kBtu/ft² across 51,690 sq ft.
What are 6059 Cornerstone's carbon emissions?
No greenhouse-gas emissions figure was reported for 2022.
Where is 6059 Cornerstone?
6059 Cornerstone is at 6059 Cornerstone Court, in San Diego, California. Its coordinates are 32.89636, -117.19001 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 6059 Cornerstone and when was it built?
6059 Cornerstone has 51,690 sq ft of gross floor area, as reported in its 2022 disclosure. The disclosure lists 1987 as its year built. It is classed as office.
Is 6059 Cornerstone covered by the Building Energy Benchmarking Ordinance (SDMC Ch. 14 Art. 12)?
Yes — it appears in the 2022 Building Energy Benchmarking disclosure, which lists the buildings reporting under the Building Energy Benchmarking Ordinance (SDMC Ch. 14 Art. 12).
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About this data
Source: Building Energy Benchmarking (Building Energy Benchmarking Ordinance (SDMC Ch. 14 Art. 12)), as published July 9, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “6059 Cornerstone, San Diego, California — 2022 benchmarking disclosure”, https://buildingcensus.com/buildings/san-diego/6059-cornerstone-355824ba (data as of July 9, 2026).