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California contractor license

Polytec Construction Company Inc

Polytec Construction Company Inc of South San Francisco holds California license 943505 (A General Engineering, B General Building, C10 Electrical, C16 Fire Protection, C20 Warm-Air Heating, Ventilating and Air-Conditioning, C36 Plumbing). The CSLB file dated Oct 30, 2026 lists it as active.1 It expires Feb 29, 2028.

Licensed 16 years, longer than 56% of 30 active South San Francisco electrical contractors.

Active

Polytec Construction Company Inc, South San Francisco

License
943505
Class
A General Engineering; B General Building; C10 Electrical; C16 Fire Protection; C20 Warm-Air Heating, Ventilating and Air-Conditioning; C36 Plumbing
Expires
Feb 29, 2028
Bond
$25,000
Workers' comp
Insured to Mar 9, 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
$25,000Philadelphia Indemnity Insurance Company, from Jun 23, 2025, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredState Compensation Insurance Fund, from Mar 9, 2022, to Mar 9, 2027

Who is on this license?

Responsible managing officer, CEO and president
Yiu Chuen WongSince Mar 18, 2016

What work does this license cover?

Issued Feb 16, 2010.

Which other South San Francisco businesses hold A General Engineering?

California electrical contractorsCalifornia plumbing 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)