Home / License lookup / California / Sonoma County Plumbing Inc
California contractor license
Sonoma County Plumbing Inc
Sonoma County Plumbing Inc of Windsor holds California license 748975 (B General Building, C16 Fire Protection, C36 Plumbing). The CSLB file dated Nov 1, 2026 lists it as active.1 It expires Oct 31, 2027.
Licensed 28 years, longer than 82% of 9,564 active California plumbing contractors.
Active
Sonoma County Plumbing Inc, Windsor
- License
- 748975
- Class
- B General Building; C16 Fire Protection; C36 Plumbing
- Expires
- Oct 31, 2027
- Bond
- $25,000
- Workers' comp
- Self-insured
CSLB file dated Nov 1, 2026
From the CSLB file dated Nov 1, 2026. Not a consumer report; check the board before you hire.
Has the board taken action on this license?
None in the CSLB file dated Nov 1, 2026. Confirm with the board: CSLB license check
What bond, insurance and workers' comp are on file?
- Bond
- $25,000American Contractors Indemnity Company, from Jan 1, 2023, continuous
- Liability insurance
- Not in the CSLB fileCheck with the board
- Workers' comp
- Self-insuredDepartment Of Industrial Relations, from Oct 1, 2006
Who is on this license?
- Responsible managing officer, CEO and president
- David J. ZmrzelSince May 6, 1998
What work does this license cover?
Issued May 6, 1998. Inactive May 6, 1998 to Jun 1, 2000. Reissued Oct 7, 2003.
- B General Building
- C16 Fire Protection
- C36 Plumbing
Which other Windsor businesses hold B General Building?
- J J Cook Enterprises IncLicensed since 1996
- Soule Building Systems IncLicensed since 1997
- Intentional Contracting IncLicensed since 1999
- Rogers Radiant IncLicensed since 2000
- Harkey Construction IncLicensed since 2001
California plumbing contractorsCalifornia general contractors
What should you check before hiring?
What to ask before you hire
- Get the license number in writing. The name on the license should match the name on your contract and invoice.
- Check the class covers the job. A license for one trade doesn't cover another. California license classes
- Ask for a certificate of insurance sent to you by the insurance agent, not handed over by the contractor. How to read a COI
- Ask who will be on site. If a crew works on your property, ask for proof of workers' comp. An exemption on file means the contractor told the CSLB it has no employees.
- Put it in a written contract: license number, price, start date and payment schedule. Check the license again on the day you sign.
If the license is lapsed
- Don't sign or pay a deposit until the CSLB shows the license active again.
- Ask the contractor why. For a bond or insurance lapse, ask for proof that the new bond or policy was filed with the CSLB, then check again.
- If work has started, hold further payments, keep the contract, receipts and photos, and file a complaint with Contractors State License Board (CSLB).
- Check another contractor. California license lookup
Sources
- CSLB License Master (cslb.ca.gov, Nov 1, 2026)
- Contractors State License Board (CSLB)