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California contractor license

San Diego Backflow Testing

San Diego Backflow Testing of San Diego holds California license 1054091 (C4 Boiler, Hot Water Heating and Steam Fitting, C12 Earthwork and Paving, C34 Pipeline, C36 Plumbing, C42 Sanitation System). The CSLB file dated Oct 26, 2026 lists it as active.1 It expires Mar 31, 2028.

Active

San Diego Backflow Testing, San Diego

  • Workers' comp on file ended Oct 24, 2026.
License
1054091
Class
C4 Boiler, Hot Water Heating and Steam Fitting; C12 Earthwork and Paving; C34 Pipeline; C36 Plumbing; C42 Sanitation System
Expires
Mar 31, 2028
Bond
$25,000
Workers' comp
Insured to Oct 24, 2026

CSLB file dated Oct 26, 2026

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

Bond
$25,000North River Insurance Company (The), from Feb 19, 2023, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredTechnology Insurance Company Inc, from Oct 24, 2025, to Oct 24, 2026

What work does this license cover?

Issued May 29, 2019.

Which other San Diego businesses hold C4 Boiler, Hot Water Heating and Steam Fitting?

Plumbing Contractors in San DiegoCalifornia plumbing contractorsHVAC Contractors in San DiegoCalifornia HVAC 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 26, 2026)
  2. Contractors State License Board (CSLB)