Flum Construction, A General Engineering Contractor in Windsor, CA
Flum Construction operating as a sole owner holds an active California contractor license (CSLB #485669), valid through Jan 31, 2028. First issued in 1986, the license has been on the CSLB roster for 40 years. It carries 2 CSLB classifications: A General Engineering Contractor and 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 Windsor, in Sonoma County, California.
- License Number
- 485669
- Issued
- Jan 17, 1986
- Status
- CLEAR
- Expires
- Jan 31, 2028
- Entity
- Sole Owner
- Surety
- American Contractors Indemnity Company
- Bond Number
- 100426699
- Effective
- Jan 1, 2023
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Dec 22, 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 Flum Construction licensed in California?
Yes. Flum Construction holds California Contractors State License Board license number 485669, which is active and in good standing. The license was first issued on January 17, 1986. It is valid through January 31, 2028.
What does Flum Construction specialize in?
Flum Construction is licensed for 2 CSLB classifications: A General Engineering Contractor and B General Building Contractor.
Where is Flum Construction headquartered?
Flum Construction is headquartered at P O Box 620, Windsor, CA 95492, in Sonoma County, California.
Does Flum Construction have an active surety bond on file with CSLB?
Yes. Flum Construction has an active California contractor surety bond filed with American Contractors Indemnity Company.
Does Flum Construction carry workers' compensation coverage?
Flum Construction reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Flum Construction's contractor license?
You can verify Flum Construction's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=485669.
- License issuedJan 17, 1986
- Bond activeJan 1, 2023
- WC coverage startsDec 22, 2025
- License expiresJan 31, 2028
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