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California contractor license

Amoroso S J Construction Co LLC

Amoroso S J Construction Co LLC of San Mateo holds California license 331024 (A General Engineering, B General Building). The CSLB file dated Nov 1, 2026 lists it as active.1 It expires Feb 29, 2028.

Licensed 49 years, longer than 94% of 156 active San Mateo general contractors.

Active

Amoroso S J Construction Co LLC, San Mateo

License
331024
Class
A General Engineering; B General Building
Expires
Feb 29, 2028
Bond
$25,000
Workers' comp
Insured to Jun 1, 2027

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
$25,000Liberty Mutual Insurance Company, from Jan 1, 2023, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredAcig Insurance Company, from Jun 1, 2026, to Jun 1, 2027

Who is on this license?

LLC member
Brian B. der MatoianSince Apr 1, 2015
Responsible managing manager
Robert W. ErskineSince Aug 14, 2007

What work does this license cover?

Issued Feb 4, 1977. Reissued Feb 25, 2020.

Which other San Mateo businesses hold A General Engineering?

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, Nov 1, 2026)
  2. Contractors State License Board (CSLB)