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California contractor license

O'Riordan Construction Inc

O'Riordan Construction Inc of San Mateo holds California license 670221 (ASB Asbestos Certification, B General Building, C2 Insulation and Acoustical, D65, HAZ Hazardous Substance Removal Certification). The CSLB file dated Oct 31, 2026 lists it as active.1 It expires Jul 31, 2027.

Licensed 33 years, longer than 83% of 156 active San Mateo general contractors.

Active

O'Riordan Construction Inc, San Mateo

License
670221
Class
ASB Asbestos Certification; B General Building; C2 Insulation and Acoustical; D65; HAZ Hazardous Substance Removal Certification
Expires
Jul 31, 2027
Bond
$25,000
Workers' comp
Insured to Aug 25, 2027

CSLB file dated Oct 31, 2026

From the CSLB file dated Oct 31, 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 31, 2026. Confirm with the board: CSLB license check

What bond, insurance and workers' comp are on file?

Bond
$25,000Western Surety Company, from Jan 1, 2023, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredBerkley Insurance Company, from Aug 25, 2026, to Aug 25, 2027

Who is on this license?

Responsible managing officer, CEO and president
Timothy O'RiordanSince Apr 27, 1993

What work does this license cover?

Issued Apr 27, 1993. Reissued Jul 26, 2011.

Which other San Mateo businesses hold ASB Asbestos Certification?

General Contractors in San MateoCalifornia 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 31, 2026)
  2. Contractors State License Board (CSLB)