Robert J Williamson
Verified against CSLB on · View on CSLB
License details
- License number
- 1155376
- Status
- Active
- Classifications
- B · General Building
- Contractor bond
- $25,000
- Workers' comp
- Exempt
- License term on file
- May 18, 2026 – May 31, 2028
Business
- (510) 813 1318 (CSLB public record)
- 17 EL CAJON, Lafayette, CA 94549Contra Costa County
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Frequently asked questions
Is Robert J Williamson licensed in California?
Yes. Robert J Williamson holds an active California state contractor license (CSLB #1155376), verified against the CSLB public record on June 17, 2026.
What is Robert J Williamson's CSLB license number?
Robert J Williamson's California contractor license number is 1155376. You can verify it directly on the CSLB website: https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1155376
What kind of work is Robert J Williamson licensed for?
Robert J Williamson is classified under General Building (B) by the CSLB.
How do I verify Robert J Williamson's license myself?
Look up license #1155376 with the CSLB "Check a License" tool at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1155376. This page reflects the CSLB public record as of June 17, 2026.
See an error in this record? Report incorrect information. Status reflects CSLB data as of the date shown above.