Mill Valley, Marin County
Sewer Line Repair in Mill Valley, CA
Need sewer line repair in Mill Valley? CNTRline is a licensed, insured plumbing company based in Rohnert Park, and we work Mill Valley and the rest of Marin County 7 days a week. We have been at it since 2017. Call (707) 308-5599 for a straight answer and a free quote.
CNTRline works sewer lines across Mill Valley, from the cottages around Old Mill Park and Blithedale Canyon to the homes in Tam Valley and Strawberry. A lot of these houses started as early-1900s summer cabins tucked into the redwoods, and many still run original clay sewer laterals. The redwood and bay canopy is the real story here. Tree roots find their way into old pipe joints, and root intrusion is one of the most common sewer calls we get in Mill Valley. Homes along Old Mill Creek and up the canyons also deal with damp ground and steep access. Across Marin, most sanitary districts require a private sewer lateral inspection and Certificate of Compliance when a home sells, so it pays to camera the line before you list. We drive down from Rohnert Park, camera the line, clear the roots, and repair the pipe so it stops coming back.
What that looks like on the job: Tree-root intrusion into old clay laterals is the common Mill Valley call under the redwood canopy. We camera the line, clear the roots, and spot-repair or replace the cracked section so it stops coming back.
For the full rundown of our sewer line repair work, see the Sewer Line Repair page. Video inspection, line repair, and full replacement.
Sewer Line Repair in nearby cities
Questions
Sewer Line Repair in Mill Valley: common questions
Free Homeowner's Guide
The Sonoma & Marin Homeowner’s Plumbing Guide
Spot problems before they flood, find your shutoffs, and see real 2026 cost ranges. A free PDF, straight from a licensed local plumber.
- 5 signs to call before it floods
- Where your three shutoffs are
- Real 2026 cost ranges for the big jobs