Corestone, B General Building Contractor in Ukiah, CA
Corestone operating as a sole owner holds an active California contractor license (CSLB #1149918), valid through Feb 29, 2028. 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 Ukiah, in Mendocino County, California.
- License Number
- 1149918
- Issued
- Feb 3, 2026
- Status
- CLEAR
- Expires
- Feb 29, 2028
- Entity
- Sole Owner
- Surety
- American Contractors Indemnity Company
- Bond Number
- 101024062
- Effective
- Jan 10, 2026
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Jan 15, 2026
- Expires
- —
Recently licensed: the CSLB license is active and in good standing, issued within the last 2 years.
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is Corestone licensed in California?
Yes. Corestone holds California Contractors State License Board license number 1149918, which is active and in good standing. The license was first issued on February 3, 2026. It is valid through February 29, 2028.
What does Corestone specialize in?
Corestone is licensed for one CSLB classification: B General Building Contractor.
Where is Corestone headquartered?
Corestone is headquartered at 4016 Fracchia Road, Ukiah, CA 95482, in Mendocino County, California.
Does Corestone have an active surety bond on file with CSLB?
Yes. Corestone has an active California contractor surety bond filed with American Contractors Indemnity Company.
Does Corestone carry workers' compensation coverage?
Corestone reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Corestone's contractor license?
You can verify Corestone's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1149918.
- Bond activeJan 10, 2026
- WC coverage startsJan 15, 2026
- License issuedFeb 3, 2026
- License expiresFeb 29, 2028
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