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California contractor license

Derleth Custom Construction Inc

Derleth Custom Construction Inc of Marina Del Rey holds California license 830190 (B General Building). The CSLB file dated Oct 29, 2026 lists it as active.1 It expires Dec 31, 2027.

Licensed 22 years, longer than 70% of 61 active Marina Del Rey general contractors.

Active

Derleth Custom Construction Inc, Marina Del Rey

License
830190
Class
B General Building
Expires
Dec 31, 2027
Bond
$25,000
Workers' comp
Insured to Jan 1, 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
InsuredOmaha National Casualty Company, from Jan 1, 2026, to Jan 1, 2027

Who is on this license?

Officer
Michael R. DerlethSince Dec 30, 2003
Responsible managing officer, CEO and president
Larry J. DerlethSince Dec 30, 2003

What work does this license cover?

Issued Dec 30, 2003.

Which other Marina Del Rey businesses hold B General Building?

California 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)