CORNERSTONE BUILDERS
License #527184·Sole Owner·LAFAYETTE, Contra Costa County
Summary
CORNERSTONE BUILDERS operating as a sole owner is licensed in California under CSLB number 527184. The license was first issued in 1988, putting the business at 38 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 BUSINESS ALLIANCE INSURANCE COMPANY and an exempt workers' compensation status (no employees on payroll). The business is based in LAFAYETTE, in Contra Costa County, California.
Business Information
License Details & Classifications
- License Number
- 527184
- Issued
- Mar 25, 1988
- Status
- CLEAR
- Expires
- Mar 31, 2028
- Entity
- Sole Owner
Classifications
Financial & Insurance Coverage
Contractor Bond
- Surety
- BUSINESS ALLIANCE INSURANCE COMPANY
- Bond Number
- G19033211191
- Effective
- Mar 31, 2026
- Status
- Active
Workers' Compensation
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Feb 26, 2026
- Expires
- —
License StatusActive
Contractor BondOn file
Workers' CompensationActive
Activity Timeline
- License issuedMar 25, 1988
- WC coverage startsFeb 26, 2026
- Bond activeMar 31, 2026
- License expiresMar 31, 2028