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State files updated Oct 29, 2026
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California contractor license

Alpha Plumbing Inc

Alpha Plumbing Inc of Palm Desert holds California license 1155643 (C36 Plumbing). The CSLB file dated Oct 29, 2026 lists it as active.1 It expires May 31, 2028.

Active

Alpha Plumbing Inc, Palm Desert

  • Board action on file.
License
1155643
Class
C36 Plumbing
Expires
May 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.

Has the board taken action on this license?

From the CSLB file dated Oct 29, 2026. Confirm with the board. CSLB license check

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

Bond
$25,000American Contractors Indemnity Company, from Apr 1, 2026, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
Exemptfrom Apr 2, 2026

Who is on this license?

Officer
Houston R. RistainoSince May 22, 2026
Responsible managing officer, CEO and president
Austin R. RistainoSince May 22, 2026

What work does this license cover?

Issued May 22, 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 Palm Desert businesses hold C36 Plumbing?

California 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)