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California contractor license

Biosources Inc

Biosources Inc of San Diego holds California license 737988 (B General Building, C10 Electrical, C20 Warm-Air Heating, Ventilating and Air-Conditioning). The CSLB file dated Oct 26, 2026 lists it as active.1 It expires Jul 31, 2027.

Active

Biosources Inc, San Diego

License
737988
Class
B General Building; C10 Electrical; C20 Warm-Air Heating, Ventilating and Air-Conditioning
Expires
Jul 31, 2027
Bond
$25,000
Workers' comp
Insured to Jul 1, 2027

CSLB file dated Oct 26, 2026

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

Issued Jul 11, 1997.

Bond
$25,000American Contractors Indemnity Company, from Jan 1, 2023, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredInsurance Company Of The West, from Jul 1, 2026, to Jul 1, 2027

What work does this license cover?

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 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 26, 2026)
  2. Contractors State License Board (CSLB)