Hartmann Construction, B General Building Contractor in Sonoma, CA
Hartmann Construction operating as a sole owner holds an active California contractor license (CSLB #660192), valid through Dec 31, 2026. First issued in 1992, the license has been on the CSLB roster for 34 years. 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 Sonoma, in Sonoma County, California.
- License Number
- 660192
- Issued
- Dec 3, 1992
- Status
- CLEAR
- Expires
- Dec 31, 2026
- Entity
- Sole Owner
- Surety
- Atlantic Specialty Insurance Company
- Bond Number
- 800229467
- Effective
- Jan 1, 2026
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Dec 9, 2024
- 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 Hartmann Construction licensed in California?
Yes. Hartmann Construction holds California Contractors State License Board license number 660192, which is active and in good standing. The license was first issued on December 3, 1992. It is valid through December 31, 2026.
What does Hartmann Construction specialize in?
Hartmann Construction is licensed for one CSLB classification: B General Building Contractor.
Where is Hartmann Construction headquartered?
Hartmann Construction is headquartered at 22040 Bonness Rd, Sonoma, CA 95476, in Sonoma County, California.
Does Hartmann Construction have an active surety bond on file with CSLB?
Yes. Hartmann Construction has an active California contractor surety bond filed with Atlantic Specialty Insurance Company.
Does Hartmann Construction carry workers' compensation coverage?
Hartmann Construction reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Hartmann Construction's contractor license?
You can verify Hartmann Construction's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=660192.
- License issuedDec 3, 1992
- WC coverage startsDec 9, 2024
- Bond activeJan 1, 2026
- License expiresDec 31, 2026
- Service Structures#145572Santa Rosa·B General Building Contractor
- Argonaut Constructors INC#171432Santa Rosa·A General Engineering Contractor
- Manor Development CO#183762Santa Rosa·B General Building Contractor
- Botieff William Contractor#193984Sonoma·B General Building Contractor
- Railla Joseph J#201956Sebastopol·B General Building Contractor
- Codding Construction CO#203301Santa Rosa·B General Building Contractor
- Western Built#232904Santa Rosa·B General Building Contractor
- Labrucherie G M#239445Santa Rosa·A General Engineering Contractor
Working a California job with Hartmann Construction, or chasing an unpaid invoice? These free tools track your mechanics lien deadlines and rights under California Civil Code §§8200–8848.
- California preliminary notice deadline calculatorFind your 20-day deadline and the lien rights at risk.
- Do I need a preliminary notice in California?Answer a few questions to see if the 20-day notice applies.
- Did I lose my California lien rights?Check whether your mechanics lien window has passed.
- Unpaid construction invoice in CaliforniaYour options and deadlines for collecting on a California job.
Own Hartmann Construction? Claim or correct this profile