California contractor license
CORNERSTONE ENVIRONMENTAL CONTRACTORS INC
- A General Engineering
- C10 Electrical
- C-61 / D21 Machinery And Pumps
- HAZ Hazardous Substances Removal
CORNERSTONE ENVIRONMENTAL CONTRACTORS INC is a contractor with 4 license classifications, including A General Engineering and C10 Electrical, in Concord, Contra Costa County, licensed in California for 30 years (since 1996). As of Sep 2, 2026, state records list the license as suspended, a license bond is on file, and permit records show 1–10 permitted projects in the last 3 years.
CORNERSTONE ENVIRONMENTAL CONTRACTORS INCA General Engineering · C10 Electrical · C-61 / D21 Machinery And Pumps · HAZ Hazardous Substances Removal · checked Sep 2, 2026
SuspendedLicense number#722253
Licensed sinceMay 2, 1996
Years licensed30 years
Expiration on recordMay 31, 2028
City and countyConcord, Contra Costa County
License bondOn file
Projects1–10 permitted projects in the last 3 years
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Source: California Contractors State License Board (CSLB) and City of Los Angeles permit records. Last updated Sep 2, 2026.