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State files updated Oct 30, 2026
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California contractor license

Serres Corporation

Serres Corporation of Sonoma holds California license 471196 (A General Engineering). The CSLB file dated Oct 30, 2026 lists it as active.1 It expires Mar 31, 2027.

Licensed 41 years, longer than 94% of 85 active Sonoma general contractors.

Active

Serres Corporation, Sonoma

License
471196
Class
A General Engineering
Expires
Mar 31, 2027
Bond
$25,000
Workers' comp
Insured to Jan 1, 2027

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
$25,000Endurance Assurance Corporation, from Feb 2, 2024, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredPraetorian Insurance Company, from Jan 1, 2026, to Jan 1, 2027

Who is on this license?

Officer
Judy SerresSince Mar 8, 1999
Officer
John M. SerresSince Feb 14, 2005
Responsible managing officer, CEO and president
John P. SerresSince Mar 27, 1985

What work does this license cover?

Issued Mar 27, 1985.

Which other Sonoma businesses hold A General Engineering?

California 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)