Koster Construction, A General Engineering Contractor in Rough and Ready, CA
Koster Construction operating as a sole owner holds California contractor license #922170, which is currently expired (lapsed Sep 30, 2026) and not valid to contract until it is renewed. First issued in 2008, the license has been on the CSLB roster for 18 years. It carries 2 CSLB classifications: A General Engineering Contractor and 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 Rough and Ready, in Nevada County, California.
- License Number
- 922170
- Issued
- Sep 15, 2008
- Status
- CLEAR
- Expires
- Sep 30, 2026
- Entity
- Sole Owner
- Surety
- Atlantic Specialty Insurance Company
- Bond Number
- 800209628
- Effective
- Sep 6, 2025
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Oct 4, 2024
- Expires
- —
This contractor has a compliance issue in its public CSLB record:
- License expired
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is Koster Construction licensed in California?
Koster Construction previously held California Contractors State License Board license number 922170, but the license expired on September 30, 2026 and is not currently valid. It was first issued on September 15, 2008.
What does Koster Construction specialize in?
Koster Construction is licensed for 2 CSLB classifications: A General Engineering Contractor and B General Building Contractor.
Where is Koster Construction headquartered?
Koster Construction is headquartered at 10204 Valley Drive, Rough and Ready, CA 95975, in Nevada County, California.
Does Koster Construction have an active surety bond on file with CSLB?
Yes. Koster Construction has an active California contractor surety bond filed with Atlantic Specialty Insurance Company.
Does Koster Construction carry workers' compensation coverage?
Koster Construction reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Koster Construction's contractor license?
You can verify Koster Construction's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=922170.
- License issuedSep 15, 2008
- WC coverage startsOct 4, 2024
- Bond activeSep 6, 2025
- License expiredSep 30, 2026
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