Plumbing permits in City of Sammamish: fees, timeline & requirements (2026)
Everything you need to know about pulling a plumbing permit in City of Sammamish, Washington — when one is required, what it costs, how long review takes, what documents are required, and which inspections you can expect. Cited to Apply via MyBuildingPermit.com..
Free lookup, no account needed — your lot polygon, zoning, setbacks and overlays, cited to City of Sammamish's source.
When does a plumbing need a permit in City of Sammamish?
Fixture additions/relocations and water/drain piping require a plumbing permit; stopping leaks, clearing stoppages, and removing/reinstalling water closets (without replacing valves/pipes/fixtures) are exempt. A Residential Fixture Count form is required; a Sewer Availability Certificate is required when fixtures are added.
In the source's own words
“Stopping leaks in drains/pipes; clearing stoppages; repairing/removing water closets (without valve/pipe/fixture replacement).”Source ↗verified 2026-09-24
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
plumbing
Who can do this work in City of Sammamish?
Kolmo Construction is a licensed Washington general contractor — KOLMOL*753JS, active through April 10, 2027, bonded and insured — working throughout City of Sammamish and King County. Kolmo prepares the drawings and submittals, files the plumbing permit with Apply via MyBuildingPermit.com., carries the project through review and inspections, and performs the construction. Call (206) 410-5100 for a City of Sammamish 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. Confirm your parcel's zoning & overlays. Run an address lookup for your City of Sammamish plumbing — we'll pull your specific lot polygon, zoning, setbacks, and any shoreline/ECA/historic overlays.
- 2. Assemble submittals (3).
- 3. Submit through the city portal: Apply via MyBuildingPermit.com. ↗
- 4. Track review. Respond to reviewer comments promptly.
- 5. Pay issuance fees (Plumbing permit fees are set by fixture count in the city's fee schedule. Apply via https://mybuildingpermit.com.) and pick up the permit. Inspection card travels with the job.
Or have Kolmo do it
We pull plumbing permits in City of Sammamish every month. We prepare the drawings and submittals, file with Apply via MyBuildingPermit.com., handle reviewer comments, and build the project.
Licensed WA general contractor KOLMOL*753JS · bonded & insured
Plumbing permits in City of Sammamish — FAQ
When does a plumbing need a permit in City of Sammamish?
Fixture additions/relocations and water/drain piping require a plumbing permit; stopping leaks, clearing stoppages, and removing/reinstalling water closets (without replacing valves/pipes/fixtures) are exempt. A Residential Fixture Count form is required; a Sewer Availability Certificate is required when fixtures are added.
How much does a plumbing permit cost in City of Sammamish?
Current fee per the City of Sammamish fee schedule: Plumbing permit fees are set by fixture count in the city's fee schedule. Apply via https://mybuildingpermit.com.. Plus ancillary plan-review/tech-surcharge fees per city schedule.