#1 · RENTON
Sewer repair fixes breaks, root intrusion, and sags in the side sewer running from your house to the city main. On the wet side you own that entire line — including under the street — and our root-heavy, wet soils are hard on old clay and concrete pipe.
Wet-side market range — get itemized quotes before work starts
Companies whose focus matches this work are listed first, then Renton's other top-rated plumbers. Same no-pay-to-play ranking as everywhere on Wetside Plumbing — the formula.
Google Business data, 2026-08-07. See the full Renton ranking →
Also searched as: blocked sewer pipe, broken sewer pipe, broken sewers, clogged mainline sewer, clogged sewer, clogged sewer main.
Always, for anything beyond a simple clog. $150–$500, often credited toward repairs, and it turns a five-figure guess into an evidence-based decision. Get the footage itself, not a verbal summary.
In most wet-side jurisdictions, including Seattle: you. Homeowners own the full side sewer to the main. It surprises everyone — check our sewer cost guide before you're quoted.
Ask for their Washington L&I contractor number and verify it at secure.lni.wa.gov/verify — active license, bond, and insurance. Listings above with a green badge are ones we've already matched to an active license in state records.