Best Plumbers in SeattleWA L&I verified
Ranges from Seattle-area licensed contractors
What plumbing work costs in Seattle
Seattle plumbing prices sit well above the national average, tracking the region's overall cost of living. Standard residential labor runs $90 to $200 per hour, most companies charge a $75 to $200 trip fee per visit, and emergency calls add premiums of $100 to $250 per hour on nights and weekends. Small jobs are billed mostly on time; anything substantial, from a water heater swap to a sewer replacement, is quoted flat after an on-site look.
The table below shows the typical range for every service in the directory. Each row links to a page with the full breakdown: what drives the cost, permit requirements, what insurance covers, and every licensed plumber who does the work.
| Service | Typical Seattle cost | Permit |
|---|---|---|
| Emergency Plumbing | $175 - $4,000+ | A PHSKC plumbing permit is required for most emergency work beyond minor repairs, and reputable plumbers file it as part of the job. |
| Leak Detection | $150 - $600 | No permit is needed for the diagnostic phase, only for the repair that follows. |
| Frozen Pipes | $400 - $2,400 | A permit is required when frozen or burst pipe sections must be replaced. |
| Clogged Toilets | $120 - $823 | No permit is required for unclogging a toilet. |
| Drain Cleaning | $120 - $600 | No permit is required for routine drain cleaning. |
| Hydro-Jetting | $389 - $960 | No permit is required for hydro jetting an existing line. |
| Sewer Line Repair | $1,200 - $4,800+ | Sewer line repair requires a permit, and in Seattle a side sewer permit from SDCI. |
| Trenchless Sewer Replacement | $3,500 - $15,000+ | Trenchless sewer replacement requires a permit before work begins. |
| Sewer Scope Inspection | $250 - $1,160 | No permit is required for a camera inspection. |
| Water Heater | $960 - $3,000 | A plumbing permit has been mandatory for water heater replacement since 2025. |
| Tankless Water Heaters | $1,582 - $5,400 | A plumbing permit has been mandatory for tankless installs since 2025, plus a gas permit for gas-fired units. |
| Toilet Repair | $120 - $550 | No permit is required unless the waste line itself is being replaced. |
| Bidet Installation | $400 - $1,500 | No permit is required for seat-style bidets; adding a new supply line may need one. |
| Faucet & Fixture Installation and Repair | $90 - $1,896 | No permit is required for like-for-like fixture swaps, only for structural changes. |
| Garbage Disposal Installation and Repair | $80 - $625 | No plumbing permit is required, though new electrical circuits need an electrical permit. |
| Sump Pump Installation and Replacement | $600 - $4,000 | A permit is required when adding new drainage or dedicated circuits. |
| Water Softener Installation | $1,000 - $3,000 | A permit is required because the installation cuts into the main supply line. |
| Whole-House Repiping | $2,400 - $18,000 | Whole-home repiping always requires a plumbing permit and inspection. |
| Water Line Repair and Replacement | $1,749 - $4,610 | Water service line replacement requires a permit and utility locates before digging. |
| Water Pressure Regulation and Adjustment | $200 - $1,800 | A permit is required when a pressure-reducing valve is installed on the main. |
| Gas Line Installation and Repair | $289 - $3,900 | Gas line work always requires a permit and a pressure test inspection. |
| Backflow Prevention Testing and Certification | $65 - $100 | Annual testing needs no permit; new backflow assemblies must be permitted. |
| Commercial Plumbing Systems | $4 - $16 per sq. ft. | Commercial plumbing work requires permits and PHSKC plan review. |
| Residential Plumbing Services | $90 - $200 per hour | Most residential plumbing beyond minor repairs requires a PHSKC permit. |
| Plumbing Remodeling and Fixture Relocation | $200 - $300 (permit fees) | Moving fixtures or adding a bathroom requires a building permit and a PHSKC plumbing permit. |
Ranges reflect typical Seattle-metro pricing across licensed contractors and vary with access, home age, and scope. Permit requirements reference Public Health Seattle & King County; neighboring counties have equivalent rules.
Seattle plumbing cost questions
- What do plumbers charge per hour in Seattle?
- Standard plumbing labor in Seattle runs $90 to $200 per hour for residential service calls, and with current demand most homeowners land at the $150 to $200 end. Specialty work like complex retrofits or commercial integrations bills at $190 to $450 per hour. On top of labor, expect a diagnostic trip fee of $75 to $200 that covers travel time and parking.
- How much does an emergency plumber cost in Seattle?
- Emergency dispatches on nights, weekends, and holidays carry premiums of $100 to $250 per hour above standard rates, plus the usual trip fee. A full emergency job in Seattle typically lands between $175 for a fast simple fix and $4,000 or more when a burst line requires hours of work to stabilize.
- How much does it cost to unclog a drain in Seattle?
- Professional drain cleaning in Seattle costs $120 to $600 depending on whether it is a small branch line or a main waste stack. A clogged toilet runs $120 to $480 for standard snaking, up to $823 when the toilet has to be pulled. Be wary of $99 drain specials, which often turn into much larger bills once the technician arrives.
- How much does it cost to replace a water heater in Seattle?
- A standard tank water heater replacement in Seattle runs $960 to $3,000 installed. Tankless conversions cost more, typically $1,582 to $5,400, because of gas line and venting work. Either way a plumbing permit has been mandatory since 2025, and a legitimate quote includes it.
- How much does sewer line repair cost in Seattle?
- Spot sewer line repairs in Seattle run $1,200 to $4,800 or more, while full trenchless replacement runs $3,500 to $15,000. Because side sewers are the homeowner's responsibility all the way to the city main, a $250 to $1,160 sewer scope inspection before buying an older home is the cheapest insurance available.
- How much does it cost to repipe a house in Seattle?
- Whole-home repiping in Seattle runs $2,400 to $18,000 depending on the home's size, the number of fixtures, pipe material (PEX at the lower end, copper at the upper), and how much wall repair is included. Homes with recurring pinhole leaks or brown hot water are the usual candidates.
- Will homeowners insurance cover plumbing repairs?
- Insurance generally covers the water damage from sudden and accidental failures, including tear-out to reach a hidden leak, but not the repair of the failed pipe or appliance itself. Damage from gradual leaks and deferred maintenance is excluded, and sewer backups are only covered with a specific sewer and sump pump backup rider.
- How do I know if a Seattle plumber is charging fairly?
- Check that their Washington L&I contractor license is active, compare two or three written quotes for anything over about $1,000, and confirm the quote includes permits where required. Every plumber in this directory is license-verified, and each service page above lists the typical local range so an outlier quote stands out immediately.
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