Plumbing permits in Renton: fees, timeline & requirements (2026)
Everything you need to know about pulling a plumbing permit in Renton, Washington — when one is required, what it costs, how long review takes, what documents are required, and which inspections you can expect. Cited to Renton Community and Economic Development — Development Services.
Free lookup, no account needed — the office that issues the permit at your address, the mapped areas on the lot, cited to Renton's source.
When does plumbing work need a permit in Renton?
New or rearranged piping requires a plumbing permit; stopping/repairing leaks and clearing stoppages are exempt, but removing and replacing a defective concealed trap, drain, water, soil, waste, or vent pipe is "new work" requiring a permit.
In the source's own words
“The stopping and/or repairing of leaks in drains, water, soil, waste or vent pipe; provided, however, that should any concealed trap, drain pipe, water, soil, waste or vent pipe become defective and it becomes necessary to remove and replace the same with new material, the same shall be considered as new work and a permit shall be obtained.”Source ↗verified 2026-05-29
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 Renton?
Kolmo Construction is a licensed Washington general contractor — KOLMOL*753JS, active through April 10, 2027, bonded and insured — working throughout Renton and King County. Kolmo manages the plumbing job from start to finish: a licensed plumbing contractor performs the work and the permit, and Kolmo coordinates the scope, schedule, inspections and any related construction. Call (206) 410-5100 for a Renton 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 Renton — we'll confirm which office issues the permit at that address and whether the lot is in a critical area or a flood hazard area, which Renton's rule turns on.
- 2. Assemble submittals: the 3 documents under Required submittals above.
- 3. Submit through the city portal: Renton Community and Economic Development — Development Services ↗
- 4. Track review. Respond to reviewer comments promptly.
- 5. Pay issuance fees (Renton'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 Renton — FAQ
When does plumbing work need a permit in Renton?
New or rearranged piping requires a plumbing permit; stopping/repairing leaks and clearing stoppages are exempt, but removing and replacing a defective concealed trap, drain, water, soil, waste, or vent pipe is "new work" requiring a permit.
How much does a plumbing permit cost in Renton?
Renton's residential plumbing permit is a $69 base fee plus $12 for each fixture or set of fixtures on one trap, $12 for the water service from meter to house, $12 a fixture for repairing or altering drain or vent piping, and $28 for each gas piping system of up to 6 outlets; plan review, where required, is 40% of the permit fee. The City adds its 5% technology surcharge to each of these fees (Fee Schedule 2025-2026). Apply via https://permitting.rentonwa.gov.