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California contractor license

Sdi Insulation Inc

Sdi Insulation Inc of Burlingame holds California license 607274 (B General Building, C2 Insulation and Acoustical, D34, D65). The CSLB file dated Oct 29, 2026 lists it as active.1 It expires Nov 30, 2028.

Licensed 35 years, longer than 85% of 132 active Burlingame general contractors.

Active

Sdi Insulation Inc, Burlingame

  • Workers' comp has a cancellation date on file: Oct 29, 2026.
License
607274
Class
B General Building; C2 Insulation and Acoustical; D34; D65
Expires
Nov 30, 2028
Bond
$25,000
Workers' comp
Insured to Feb 28, 2027

CSLB file dated Oct 29, 2026

From the CSLB file dated Oct 29, 2026. Not a consumer report; check the board before you hire.

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

Bond
$25,000American Contractors Indemnity Company, from Jan 1, 2023, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredState Compensation Insurance Fund, from Feb 28, 2026, to Feb 28, 2027, cancel date Oct 29, 2026

Who is on this license?

Officer
Steven B. de LorenziSince Jul 20, 2016
Responsible managing officer, CEO and president
Steven G. de LorenziSince Nov 29, 1990

What work does this license cover?

Issued Nov 29, 1990.

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

Which other Burlingame businesses hold B General Building?

General Contractors in BurlingameCalifornia 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 29, 2026)
  2. Contractors State License Board (CSLB)