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State files updated Oct 29, 2026
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California contractor license

Ashtonco LLC

Ashtonco LLC of Piedmont holds California license 1058186 (B General Building, C17 Glazing, C23 Ornamental Metal, C43 Sheet Metal, C51 Structural Steel). The CSLB file dated Oct 29, 2026 lists it as active.1 It expires Sep 30, 2027.

Active

Ashtonco LLC, Piedmont

License
1058186
Class
B General Building; C17 Glazing; C23 Ornamental Metal; C43 Sheet Metal; C51 Structural Steel
Expires
Sep 30, 2027
Bond
$25,000
Workers' comp
Insured to Mar 26, 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
$25,000Western Surety Company, from Jul 13, 2025, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredEmployers Preferred Insurance Company, from Mar 26, 2026, to Mar 26, 2027

Who is on this license?

Responsible managing manager
David R. AshtonSince Sep 16, 2019

What work does this license cover?

Issued Sep 16, 2019.

Which other Piedmont businesses hold B General Building?

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