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California contractor license

A1 Best Plumbing & Restoration

A1 Best Plumbing & Restoration of Signal Hill holds California license 812317 (B General Building, C36 Plumbing). The CSLB file dated Nov 1, 2026 lists it as active.1 It expires Mar 31, 2028.

Doing business as Coastline Environmental Solutions Inc.

Licensed 24 years, longer than 77% of 9,564 active California plumbing contractors.

Active

A1 Best Plumbing & Restoration, Signal Hill

License
812317
Class
B General Building; C36 Plumbing
Expires
Mar 31, 2028
Bond
$25,000
Workers' comp
Insured to May 25, 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
$25,000Western Surety Company, from Jan 1, 2023, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredState Compensation Insurance Fund, from May 25, 2021, to May 25, 2027

Who is on this license?

Officer
Ana R. AttardoSince Mar 14, 2022
Responsible managing officer, CEO and president
Vincent J. AttardoSince Sep 9, 2002

What work does this license cover?

Issued Sep 9, 2002. Reissued Mar 14, 2022.

Which other Signal Hill businesses hold B General Building?

California plumbing contractorsCalifornia 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)