Skip to content
State files updated Oct 29, 2026
Look up a contractor
MenuClose

Home / License lookup / California / Koslu Corporation

California contractor license

Koslu Corporation

Koslu Corporation of Gardena holds California license 336885 (B General Building). The CSLB file dated Oct 29, 2026 lists it as active.1 It expires Sep 30, 2027.

Licensed 49 years, longer than 92% of 161 active Gardena general contractors.

Active

Koslu Corporation, Gardena

  • Bond has a cancellation date on file: Nov 25, 2026.
License
336885
Class
B General Building
Expires
Sep 30, 2027
Bond
$25,000
Workers' comp
Exempt

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
$25,000Business Alliance Insurance Company, from Jan 1, 2023, continuous, cancel date Nov 25, 2026
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
Exemptfrom Aug 18, 2025

Who is on this license?

Officer
Patricia H. KoshiSince Jun 24, 1977
Officer
Darin T. KoshiSince Dec 14, 1993
Responsible managing officer, CEO and president
Paul Y. KoshiSince Jun 24, 1977

What work does this license cover?

Issued Jun 24, 1977.

The workers' comp exemption means the holder told the CSLB it has no employees. If a crew works on your job, ask for a workers' comp certificate.

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

Which other Gardena businesses hold B General Building?

General Contractors in GardenaCalifornia 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)