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State files updated Oct 29, 2026
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California contractor license

Utmost Plumbing

Utmost Plumbing of San Diego holds California license 1131006 (C36 Plumbing). The CSLB file dated Oct 29, 2026 lists it as active.1 It expires Jul 31, 2028.

Active

Utmost Plumbing, San Diego

License
1131006
Class
C36 Plumbing
Expires
Jul 31, 2028
Bond
$25,000
Workers' comp
Exempt

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
$25,000Philadelphia Indemnity Insurance Company, from Jul 13, 2026, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
Exemptfrom Apr 13, 2026

Who is on this license?

Responsible managing officer, CEO and president
Carlos A. FonsecaSince Dec 27, 2024

What work does this license cover?

Issued Dec 27, 2024. Reissued Jul 13, 2026.

The workers' comp exemption means the holder told the CSLB it has no employees. If a crew works on your job, ask for a workers' comp certificate.

Which other San Diego businesses hold C36 Plumbing?

Plumbing Contractors in San DiegoCalifornia plumbing 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)