DESIGN INTERLOCK INC operating as a corporation is licensed in California under CSLB number 566263. The license was first issued in 1989, putting the business at 37 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 HARTFORD FIRE INSURANCE COMPANY and an exempt workers' compensation status (no employees on payroll). The business is based in LINCOLN, in Placer County, California.