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California contractor license

Diodati Construction

Diodati Construction of Burlingame holds California license 449501 (B General Building, C29 Masonry). The CSLB file dated Oct 26, 2026 lists it as active.1 It expires Oct 31, 2026.

Doing business as Diodati,inc.

Active

  • License ends Oct 31, 2026 (5 days)

Diodati Construction, Burlingame

  • Workers' comp has a cancellation date on file: Nov 6, 2026.
License
449501
Class
B General Building; C29 Masonry
Expires
Oct 31, 2026
Bond
$25,000
Workers' comp
Insured to Jan 7, 2027

CSLB file dated Oct 26, 2026

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

Issued Dec 2, 1983.

Bond
$25,000Ohio Casualty Insurance Company (The), from Jan 1, 2023, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredState Compensation Insurance Fund, from Jan 7, 2026, to Jan 7, 2027, cancel date Nov 6, 2026

What work does this license cover?

A cancellation date is on file for a bond or policy. Ask for a current certificate before work starts.

What should you check before hiring?

What to ask before you hire

  1. Ask whether it has been renewed. Something on this license ends within 60 days. Check again before you pay a deposit.
  2. Get the license number in writing. The name on the license should match the name on your contract and invoice.
  3. Check the class covers the job. A license for one trade doesn't cover another. California license classes
  4. Ask for a certificate of insurance sent to you by the insurance agent, not handed over by the contractor. How to read a COI
  5. 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.
  6. 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)