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California contractor license

Filipponi-Thompson Drilling Inc

Filipponi-Thompson Drilling Inc of Atascadero holds California license 432680 (A General Engineering, C57 Well Drilling). The CSLB file dated Nov 1, 2026 lists it as active.1 It expires Dec 31, 2026.

Licensed 43 years, longer than 93% of 95 active Atascadero general contractors.

Active

  • License ends Dec 31, 2026 (60 days)

Filipponi-Thompson Drilling Inc, Atascadero

License
432680
Class
A General Engineering; C57 Well Drilling
Expires
Dec 31, 2026
Bond
$25,000
Workers' comp
Insured to Apr 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
$25,000Atlantic Specialty Insurance Company, from May 21, 2026, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredTravelers Property Casualty Company Of America, from Apr 1, 2026, to Apr 1, 2027

Who is on this license?

Officer
Ned M. ThompsonSince Dec 16, 1982
Responsible managing officer, CEO and president
Douglas C. FilipponiSince Dec 16, 1982

What work does this license cover?

Issued Dec 16, 1982.

Which other Atascadero businesses hold A General Engineering?

California general contractors

What should you check before hiring?

What to ask before you hire

  1. Ask whether it has been renewed. Something on this license ends within 60 days. Check again before you pay a deposit.
  2. Get the license number in writing. The name on the license should match the name on your contract and invoice.
  3. Check the class covers the job. A license for one trade doesn't cover another. California license classes
  4. Ask for a certificate of insurance sent to you by the insurance agent, not handed over by the contractor. How to read a COI
  5. 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.
  6. 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)