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California contractor license

Sevenson Environmental Services Inc

Sevenson Environmental Services Inc of Niagara Falls holds California license 590741 (A General Engineering, HAZ Hazardous Substance Removal Certification). The CSLB file dated Oct 30, 2026 lists it as active.1 It expires Mar 31, 2028.

Licensed 36 years, longer than 90% of 62,932 active California general contractors.

Active

Sevenson Environmental Services Inc, Niagara Falls

License
590741
Class
A General Engineering; HAZ Hazardous Substance Removal Certification
Expires
Mar 31, 2028
Bond
$25,000
Workers' comp
Insured to Jul 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
$25,000Vigilant Insurance Company, from Jan 1, 2023, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredZurich American Insurance Company, from Jul 1, 2026, to Jul 1, 2027

Who is on this license?

Officer
Dena M. ArmstrongSince Apr 11, 1994
Responsible managing officer
Laurence A. EliaSince Mar 19, 1990
CEO and president
Michael A. EliaSince Mar 19, 1990

What work does this license cover?

Issued Mar 19, 1990.

Where are other licensed California contractors listed?

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)