Install or Replace a Sewer Main Cost in Seattle, WA in 2026
Most Install or Replace a Sewer Main projects in Seattle, WA cost between $1,300 and $26,000. The typical price is $6,500.
Sewer main replacement involves excavation, permits and often street restoration.
Labour and materials in Seattle run about 20% above the national average. These figures are adjusted for that, so they are not the national average you will find elsewhere.
What drives the price
- Accessible fixture swap versus opening walls or slab
- Pipe material — copper, PEX or cast iron replacement
- Emergency versus scheduled work
- Permit and inspection requirements
Usually included
- Licensed plumber labour
- Pipe, fittings and standard fixtures
Usually extra
- Drywall and finish repair
- Fixtures you supply
- Municipal tap or sewer connection fees
Plumbers in Seattle, WA
Businesses listed on Google near Seattle, WA. We are not affiliated with them and do not vet them — always confirm licensing and insurance before hiring.
2 Sons Plumbing & Sewer
4.9(4,027 reviews)
2208 NW Market St #316a, Seattle, WA 98107
Gene Johnson Plumbing
4.8(4,712 reviews)
10011 Greenwood Ave N, Seattle, WA 98133
Bee's Plumbing and Heating
4.8(3,704 reviews)
2401 SW Alaska St, Seattle, WA 98106
Mr. Rooter Plumbing of Seattle
4.8(2,710 reviews)
2000 S 116th St, Seattle, WA 98168
Beacon Plumbing, Heating, Electrical & Mechanical Inc - Seattle
4.6(3,404 reviews)
515 7th Ave S, Seattle, WA 98104
Craftsman Plumbing
4.8(706 reviews)
4776 Shilshole Ave NW, Seattle, WA 98107