Thurlow Mark Builders, B General Building Contractor in Santa Rosa, CA
Thurlow Mark Builders operating as a sole owner holds an active California contractor license (CSLB #511477), valid through Nov 30, 2027. First issued in 1987, the license has been on the CSLB roster for 39 years. It carries a single CSLB classification: B — General Building Contractor. Records show an active surety bond on file with American Contractors Indemnity Company and an exempt workers' compensation status (no employees on payroll). The business is based in Santa Rosa, in Sonoma County, California.
- License Number
- 511477
- Issued
- Jun 2, 1987
- Status
- CLEAR
- Expires
- Nov 30, 2027
- Entity
- Sole Owner
- Surety
- American Contractors Indemnity Company
- Bond Number
- SC455346
- Effective
- Jan 1, 2023
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Oct 16, 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 Thurlow Mark Builders licensed in California?
Yes. Thurlow Mark Builders holds California Contractors State License Board license number 511477, which is active and in good standing. The license was first issued on June 2, 1987. It is valid through November 30, 2027.
What does Thurlow Mark Builders specialize in?
Thurlow Mark Builders is licensed for one CSLB classification: B General Building Contractor.
Where is Thurlow Mark Builders headquartered?
Thurlow Mark Builders is headquartered at 4104 Siskiyou Ave, Santa Rosa, CA 94505, in Sonoma County, California.
Does Thurlow Mark Builders have an active surety bond on file with CSLB?
Yes. Thurlow Mark Builders has an active California contractor surety bond filed with American Contractors Indemnity Company.
Does Thurlow Mark Builders carry workers' compensation coverage?
Thurlow Mark Builders reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Thurlow Mark Builders's contractor license?
You can verify Thurlow Mark Builders's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=511477.
- License issuedJun 2, 1987
- Bond activeJan 1, 2023
- WC coverage startsOct 16, 2025
- License expiresNov 30, 2027
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