CORNERSTONE CONSTRUCTION operating as a sole owner is licensed in California under CSLB number 1102366. The license was first issued in 2023, putting the business at 3 years on the active CSLB roster. It carries a single CSLB classification: B — General Building Contractor. Records show an active surety bond on file with AMERICAN CONTRACTORS INDEMNITY COMPANY and active workers' compensation coverage from AMERICAN CASUALTY COMPANY OF READING PA. The business is based in SAN FRANCISCO, in San Francisco County, California.