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State files updated Oct 31, 2026
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California contractor license

C K Plumbing Inc

C K Plumbing Inc of Duarte holds California license 987041 (C36 Plumbing). The CSLB file dated Oct 31, 2026 lists it as active.1 It expires Feb 28, 2027.

Licensed 13 years, longer than 56% of 9,636 active California plumbing contractors.

Active

C K Plumbing Inc, Duarte

  • Workers' comp on file ended Sep 11, 2026.
License
987041
Class
C36 Plumbing
Expires
Feb 28, 2027
Bond
$25,000
Workers' comp
Insured to Sep 11, 2026

CSLB file dated Oct 31, 2026

From the CSLB file dated Oct 31, 2026. Not a consumer report; check the board before you hire.

Has the board taken action on this license?

None in the CSLB file dated Oct 31, 2026. Confirm with the board: CSLB license check

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

Bond
$25,000Nationwide Mutual Insurance Company, from Jan 15, 2026, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredEmployers Compensation Insurance Company, from Sep 11, 2025, to Sep 11, 2026

Who is on this license?

Officer
Tiffany R. KoffordSince Feb 3, 2021
Responsible managing officer, CEO and president
Cree K. KoffordSince Sep 21, 2013

What work does this license cover?

Issued Sep 21, 2013. Reissued Feb 3, 2021.

Which other Duarte businesses hold C36 Plumbing?

California plumbing 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 31, 2026)
  2. Contractors State License Board (CSLB)