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Washington contractor license
Mainline Drain Service LLC
Mainline Drain Service LLC of Federal Way holds Washington license MAINLDS851JP (CC-AD Plumbing). The L&I file dated Nov 1, 2026 lists it as inactive: relicensed under a new number.1 It expired Apr 20, 2023.
Inactive
- Inactive: relicensed under a new number
- License expired Apr 20, 2023
Mainline Drain Service LLC, Federal Way
- License
- MAINLDS851JP
- Class
- CC-AD Plumbing
- Expires
- Apr 20, 2023
- Bond
- $6,000
L&I file dated Nov 1, 2026
From the L&I file dated Nov 1, 2026. Not a consumer report; check the board before you hire.
What should you do about a lapsed license?
If the license is lapsed
- Don't sign or pay a deposit until the L&I shows the license active again.
- Ask the contractor why. For a bond or insurance lapse, ask for proof that the new bond or policy was filed with the L&I, then check again.
- If work has started, hold further payments, keep the contract, receipts and photos, and file a complaint with Department of Labor and Industries (L&I).
- Check another contractor. Washington license lookup
What to ask before you hire
- Get the license number in writing. The name on the license should match the name on your contract and invoice.
- Check the class covers the job. A license for one trade doesn't cover another. Washington license classes
- Ask for a certificate of insurance sent to you by the insurance agent, not handed over by the contractor. How to read a COI
- Ask who will be on site. If a crew works on your property, ask for proof of workers' comp. The L&I file doesn't record workers' comp, so ask for the certificate.
- Put it in a written contract: license number, price, start date and payment schedule. Check the license again on the day you sign.
Has the board taken action on this license?
None in the L&I file dated Nov 1, 2026. Confirm with the board: L&I contractor lookup
What bond, insurance and workers' comp are on file?
- Bond
- $6,000Navigators Ins Co, from Apr 13, 2020, cancel date May 14, 2023
- Liability insurance
- None on file
- Workers' comp
- Not in the L&I fileCheck with the board
What work does this license cover?
License level: Construction Contractor. Issued Apr 17, 2015.
A cancellation date is on file for a bond or policy. Ask for a current certificate before work starts.
Where are other licensed Washington contractors listed?
Sources
- L&I contractor license data (data.wa.gov, Nov 1, 2026)
- Department of Labor and Industries (L&I)