Castor Construction
Castor Construction operating as a partnership is licensed in California under CSLB number 819754. The license was first issued in 2003, putting the business at 23 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 an exempt workers' compensation status (no employees on payroll). The business is based in Sebastopol, in Sonoma County, California.
- License Number
- 819754
- Issued
- May 15, 2003
- Status
- CLEAR
- Expires
- Aug 31, 2027
- Entity
- Partnership
- Surety
- Atlantic Specialty Insurance Company
- Bond Number
- 800231214
- Effective
- Jan 23, 2026
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Aug 29, 2025
- Expires
- —
This contractor warrants a closer look before contracting:
- Workers' comp listed as exempt
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is Castor Construction licensed in California?
Yes. Castor Construction holds California Contractors State License Board license number 819754. The license was first issued on May 15, 2003. It is valid through August 31, 2027.
What does Castor Construction specialize in?
Castor Construction is licensed for one CSLB classification: B General Building Contractor.
Where is Castor Construction headquartered?
Castor Construction is headquartered at 3366 Thorn Rd, Sebastopol, CA 95472, in Sonoma County, California.
Does Castor Construction have an active surety bond on file with CSLB?
Yes. Castor Construction has an active California contractor surety bond filed with Atlantic Specialty Insurance Company.
Does Castor Construction carry workers' compensation coverage?
Castor Construction reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Castor Construction's contractor license?
You can verify Castor Construction's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=819754.
- License issuedMay 15, 2003
- WC coverage startsAug 29, 2025
- Bond activeJan 23, 2026
- License expiresAug 31, 2027
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