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California contractor license

Wilson Plumbing

Wilson Plumbing of Martinez holds California license 660458 (B General Building, C36 Plumbing). The CSLB file dated Oct 29, 2026 lists it as active.1 It expires Feb 28, 2027.

Doing business as Wilson K C Plumbing Inc.

Licensed 33 years, longer than 87% of 9,636 active California plumbing contractors.

Active

Wilson Plumbing, Martinez

License
660458
Class
B General Building; C36 Plumbing
Expires
Feb 28, 2027
Bond
$25,000
Workers' comp
Insured to Dec 29, 2026

CSLB file dated Oct 29, 2026

From the CSLB file dated Oct 29, 2026. Not a consumer report; check the board before you hire.

What bond, insurance and workers' comp are on file?

Bond
$25,000Western Surety Company, from Feb 1, 2025, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredArrowood Indemnity Company, from Dec 29, 2025, to Dec 29, 2026

Who is on this license?

Officer
Carol A. WilsonSince Feb 5, 2007
Responsible managing officer, CEO and president
James K. WilsonSince Dec 7, 1992

What work does this license cover?

Issued Dec 7, 1992. Reissued Feb 5, 2007.

Which other Martinez businesses hold B General Building?

California plumbing contractorsGeneral Contractors in MartinezCalifornia general contractors

What should you check before hiring?

What to ask before you hire

  1. Get the license number in writing. The name on the license should match the name on your contract and invoice.
  2. Check the class covers the job. A license for one trade doesn't cover another. California license classes
  3. Ask for a certificate of insurance sent to you by the insurance agent, not handed over by the contractor. How to read a COI
  4. 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.
  5. 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

  1. Don't sign or pay a deposit until the CSLB shows the license active again.
  2. 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.
  3. If work has started, hold further payments, keep the contract, receipts and photos, and file a complaint with Contractors State License Board (CSLB).
  4. Check another contractor. California license lookup

Sources

  1. CSLB License Master (cslb.ca.gov, Oct 29, 2026)
  2. Contractors State License Board (CSLB)