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California contractor license

Onyx Concrete Company LLC

Onyx Concrete Company LLC of Santa Rosa holds California license 1143445 (C8 Concrete). The CSLB file dated Nov 1, 2026 lists it as active.1 It expires Sep 30, 2027.

Active

Onyx Concrete Company LLC, Santa Rosa

  • Workers' comp on file ended Oct 19, 2026.
License
1143445
Class
C8 Concrete
Expires
Sep 30, 2027
Bond
$25,000
Workers' comp
Insured to Oct 19, 2026

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
$25,000Nationwide Mutual Insurance Company, from Jul 30, 2025, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredState Compensation Insurance Fund, from Oct 19, 2024, to Oct 19, 2026

Who is on this license?

Officer
Amanda E. VencezSince Sep 11, 2025
Officer
Isidro Vencez RodriguezSince Sep 11, 2025
Responsible managing officer, CEO and president
Alejandro Vencez DiazSince Sep 11, 2025

What work does this license cover?

Issued Sep 11, 2025.

Which other Santa Rosa businesses hold C8 Concrete?

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)