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California contractor license

Thomasville Construction Inc

Thomasville Construction Inc of Fullerton holds California license 585556 (A General Engineering, B General Building, C2 Insulation and Acoustical, C20 Warm-Air Heating, Ventilating and Air-Conditioning, C36 Plumbing, D12 Synthetic Products, D34). The CSLB file dated Oct 29, 2026 lists it as active.1 It expires Nov 30, 2027.

Licensed 36 years, longer than 92% of 38 active Fullerton plumbing contractors.

Active

Thomasville Construction Inc, Fullerton

License
585556
Class
A General Engineering; B General Building; C2 Insulation and Acoustical; C20 Warm-Air Heating, Ventilating and Air-Conditioning; C36 Plumbing; D12 Synthetic Products; D34
Expires
Nov 30, 2027
Bond
$25,000
Workers' comp
Insured to Jul 1, 2027

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
$25,000American Contractors Indemnity Company, from Jan 1, 2023, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredEverest Premier Insurance Company, from Jul 1, 2026, to Jul 1, 2027

Who is on this license?

Responsible managing officer
Young J. SonSince Jan 16, 1990

What work does this license cover?

Issued Jan 16, 1990. Inactive Feb 1, 1994 to Nov 16, 2007. Reissued Nov 16, 2007.

Which other Fullerton businesses hold A General Engineering?

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, Oct 29, 2026)
  2. Contractors State License Board (CSLB)