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California contractor license

Westco Service Co

Westco Service Co of Shadow Hills holds California license 670542 (B General Building, C20 Warm-Air Heating, Ventilating and Air-Conditioning, C36 Plumbing). The CSLB file dated Nov 1, 2026 lists it as active.1 It expires May 31, 2027.

Doing business as Barberio Enterprises Inc.

Licensed 33 years, longer than 87% of 9,564 active California plumbing contractors.

Active

Westco Service Co, Shadow Hills

License
670542
Class
B General Building; C20 Warm-Air Heating, Ventilating and Air-Conditioning; C36 Plumbing
Expires
May 31, 2027
Bond
$25,000
Workers' comp
Insured to May 1, 2027

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
InsuredArch Insurance Company, from May 1, 2026, to May 1, 2027

Who is on this license?

Officer
Sara M. Barberio-ColemanSince Feb 4, 2025
Responsible managing officer, CEO and president
David G. BarberioSince Apr 10, 2003
CEO and president
Maria D. BarberioSince Feb 4, 2025
LLC director
David J. BarberioSince Feb 4, 2025

What work does this license cover?

Issued May 4, 1993.

Which other Shadow Hills businesses hold B General Building?

California plumbing contractorsCalifornia 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, Nov 1, 2026)
  2. Contractors State License Board (CSLB)