O'brien William & Sons
O'brien William & Sons operating as a sole owner is licensed in California under CSLB number 292934. The license was first issued in 1974, putting the business at 52 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 Atlantic Specialty Insurance Company and active workers' compensation coverage from State Compensation Insurance Fund. The business is based in Burlingame, in San Mateo County, California.
- License Number
- 292934
- Issued
- Apr 11, 1974
- Status
- CLEAR
- Expires
- Feb 28, 2027
- Entity
- Sole Owner
- Surety
- Atlantic Specialty Insurance Company
- Bond Number
- 800233478
- Effective
- Feb 24, 2026
- Status
- Active
- Coverage
- Workers' Compensation Insurance
- Carrier
- State Compensation Insurance Fund
- Policy Number
- 1433551
- Effective
- Nov 28, 1997
- Expires
- Nov 28, 2026
This contractor is verified, with no adverse conditions in the current CSLB record.
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is O'brien William & Sons licensed in California?
Yes. O'brien William & Sons holds California Contractors State License Board license number 292934. The license was first issued on April 11, 1974. It is valid through February 28, 2027.
What does O'brien William & Sons specialize in?
O'brien William & Sons is licensed for one CSLB classification: B General Building Contractor.
Where is O'brien William & Sons headquartered?
O'brien William & Sons is headquartered at 1590 Granada Dr, Burlingame, CA 94010, in San Mateo County, California.
Does O'brien William & Sons have an active surety bond on file with CSLB?
Yes. O'brien William & Sons has an active California contractor surety bond filed with Atlantic Specialty Insurance Company.
Does O'brien William & Sons carry workers' compensation coverage?
Yes. O'brien William & Sons carries active workers' compensation coverage through State Compensation Insurance Fund.
How do I verify O'brien William & Sons's contractor license?
You can verify O'brien William & Sons's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=292934.
- License issuedApr 11, 1974
- WC coverage startsNov 28, 1997
- Bond activeFeb 24, 2026
- WC expiresNov 28, 2026
- License expiresFeb 28, 2027
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