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California contractor license

Dna Well Drilling LLC

Dna Well Drilling LLC of Yuba City holds California license 1108209 (C57 Well Drilling). The CSLB file dated Nov 1, 2026 lists it as active.1 It expires Aug 31, 2027.

Active

Dna Well Drilling LLC, Yuba City

License
1108209
Class
C57 Well Drilling
Expires
Aug 31, 2027
Bond
$25,000
Workers' comp
Exempt

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
$25,000Business Alliance Insurance Company, from Jul 24, 2024, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
Exemptfrom Jul 7, 2025

Who is on this license?

Responsible managing member
Aaron T. RattiSince Aug 7, 2023
LLC member
David P. RattiSince Aug 7, 2023

What work does this license cover?

Issued Aug 7, 2023.

The workers' comp exemption means the holder told the CSLB it has no employees. If a crew works on your job, ask for a workers' comp certificate.

Which other Yuba City businesses hold C57 Well Drilling?

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)