Plumbing permits in Lynnwood: fees, timeline & requirements (2026)
Everything you need to know about pulling a plumbing permit in Lynnwood, Washington — when one is required, what it costs, how long review takes, what documents are required, and which inspections you can expect. Cited to Lynnwood Development & Business Services.
Free lookup, no account needed — the office that issues the permit at your address, cited to Lynnwood's source.
When does plumbing work need a permit in Lynnwood?
WAC 51-56 (2021 UPC) requires plumbing permit for installation, replacement, or relocation of any plumbing fixture, water heater, or piping. Like-for-like faucet replacement is exempt.
How Lynnwood adopted this rule
The threshold comes from the state code (WAC 51.56), which Lynnwood adopts by reference in the provision quoted below.
“As amended by the provisions of this chapter and the State of Washington Building Code Council under Chapters 51-56 and 51-57 WAC, the latest edition of the Uniform Plumbing Code (UPC) less Chapters 12 and 15”Source ↗verified 2026-10-02
What Lynnwood says in its own permit handout
From Plumbing Checklist, published by Lynnwood. This is the jurisdiction's own guidance on its permit process, not the ordinance text — where the two differ, the code governs.
“Over-the-counter issuance is available for single-family residential fixture installations, including electrical water heaters, and the like-in-kind replacement of interior equipment. Please note that gas water heater installation requires a mechanical permit and is also available online.”Checklist ↗read 2026-09-05
Required submittals
- Fixture count + DFU calc for repipes
- Water heater specs
- Sewer line plan if site work involved
Inspection sequence
- Rough-in / pressure test
- Final
Contractor specialties needed
Plumber
Who can do this work in Lynnwood?
Kolmo Construction is a licensed Washington general contractor — KOLMOL*753JS, active through April 10, 2027, bonded and insured — working throughout Lynnwood and Snohomish County. Kolmo manages the plumbing job from start to finish: a licensed plumbing contractor performs the work and pulls the permit, and Kolmo coordinates the scope, schedule, inspections and any related construction. Call (206) 410-5100 for a Lynnwood plumbing quote.
Notes & caveats
Water heater: T&P relief, expansion tank required if pressure >80psi or check valve installed. Sewer line: cleanouts at every 100ft + change of direction. Backwater valve required in flood zones.
How to apply yourself
- 1. Check who issues the permit. Run an address lookup for your plumbing work in Lynnwood — we'll confirm which office issues the permit at that address.
- 2. Assemble submittals: the 3 documents under Required submittals above.
- 3. Submit through the city portal: Lynnwood Development & Business Services ↗
- 4. Track review. Respond to reviewer comments promptly.
- 5. Pay issuance fees (Lynnwood's fee schedule sets them) and pick up the permit. Inspection card travels with the job.
Or have Kolmo do it
Kolmo runs the job: a licensed plumbing contractor does the plumbing work and pulls the permit, and Kolmo coordinates the scope, schedule, inspections and any related construction.
Licensed WA general contractor KOLMOL*753JS · bonded & insured
Plumbing permits in Lynnwood — FAQ
When does plumbing work need a permit in Lynnwood?
WAC 51-56 (2021 UPC) requires plumbing permit for installation, replacement, or relocation of any plumbing fixture, water heater, or piping. Like-for-like faucet replacement is exempt.
How much does a plumbing permit cost in Lynnwood?
Lynnwood's plumbing permit for work on an existing house (the schedule's remodel or addition line) is $257 for up to 4 fixtures and $22 for each outlet more, with a backflow device counted at $22; for new construction it is 10% of the building permit fee. A standalone gas piping permit is $257 for up to 4 outlets and $22 for each one more. A 2.5% technology fee is added (LMC 3.104).