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California contractor license

Gama Contracting Services Inc

Gama Contracting Services Inc of South El Monte holds California license 780316 (ASB Asbestos Certification, B General Building, C20 Warm-Air Heating, Ventilating and Air-Conditioning, C21 Building Moving/Demolition, C22 Asbestos Abatement, C39 Roofing, HAZ Hazardous Substance Removal Certification). The CSLB file dated Oct 30, 2026 lists it as active.1 It expires Mar 31, 2028.

Licensed 26 years, longer than 78% of 7,822 active California HVAC contractors.

Active

Gama Contracting Services Inc, South El Monte

  • Workers' comp on file ended Oct 1, 2026.
License
780316
Class
ASB Asbestos Certification; B General Building; C20 Warm-Air Heating, Ventilating and Air-Conditioning; C21 Building Moving/Demolition; C22 Asbestos Abatement; C39 Roofing; HAZ Hazardous Substance Removal Certification
Expires
Mar 31, 2028
Bond
$25,000
Workers' comp
Insured to Oct 1, 2026

CSLB file dated Oct 30, 2026

From the CSLB file dated Oct 30, 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 Oct 30, 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, 2024, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredZurich American Insurance Company, from Mar 1, 2026, to Oct 1, 2026

Who is on this license?

Officer
Dionne M. DuenasSince May 26, 2022
Responsible managing officer, CEO and president
Jose S. DuenasSince Jun 15, 2000

What work does this license cover?

Issued Jun 15, 2000. Inactive Jul 1, 2002 to Mar 11, 2005. Reissued Mar 28, 2008.

Which other South El Monte businesses hold ASB Asbestos Certification?

California HVAC contractorsCalifornia 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 30, 2026)
  2. Contractors State License Board (CSLB)