Marin County

Plumber in Mill Valley, CA

CNTRline Plumbing works across Mill Valley, from the cottages around Old Mill Park and Blithedale Canyon to the homes in Tam Valley and Strawberry. We make the drive down from Rohnert Park for the whole southern Marin area. The redwoods and creeks here are beautiful, and they are also hard on plumbing.

Local Plumber

Plumbing in Mill Valley

A lot of Mill Valley homes started as early-1900s summer cabins tucked into the redwoods, and many still run on original clay sewer laterals and dated supply pipe. The redwood and bay canopy means tree roots find their way into old pipe joints, which is one of the most common calls we get here. Homes along Old Mill Creek and up the canyons also deal with damp crawlspaces and steep access.

Tree-root intrusion into old laterals is common under the Mill Valley canopy, so we camera the line, clear the roots, and fix the pipe so it stops coming back.

Neighborhoods we cover: Downtown, Old Mill Park, Blithedale Canyon, Tam Valley, Homestead Valley, Strawberry.

ZIP codes: 94941.

Book a Plumber in Mill Valley

Or call (707) 308-5599. We reply fast.

Our Services

What we do in Mill Valley

Water Heater Repair & Installation

Tank and tankless. Same-day replacement for failed units.

Drain Cleaning

Clogged sinks, tubs, and main lines cleared fast.

Gas Line Repair & Installation

Leaks, new lines, additions, and gas main replacement.

Sewer Line Repair

Video inspection, line repair, and full replacement.

Faucet & Fixture Repair

Faucets, sinks, toilets, and shower valves installed and repaired.

Emergency Plumbing

Burst pipes and no-water calls, 7 days a week.

We also handle general service & repair, remodels, and whole-home repipes. Call (707) 308-5599 to ask.

Questions

Common questions from Mill Valley homeowners

Mill Valley is in southern Marin, the far end of our run, so it is the longest drive we make out of Rohnert Park. We still book it same day on most calls because we are on Highway 101 in Marin every week anyway. Call (707) 308-5599 in the morning and you have a good shot at an afternoon slot.
Yes, and that describes a lot of Mill Valley. We ask about access when you book so the crew shows up sized for the carry, and the new tank still gets the seismic strapping and expansion tank California code requires no matter how hard it was to get up there. A tank replacement runs $1,800 to $3,600 installed and a tankless conversion $4,500 to $9,000.
Confirm the district before you list. Most Marin sanitary districts require a private lateral inspection at point of sale, and Mill Valley is not inside the Ross Valley or Sausalito-Marin City programs, so we check the rule that applies to your address before escrow. A camera inspection is often bundled with a cleaning, which makes it a cheap thing to know early.

Why CNTRline

Why Mill Valley homeowners call us

Licensed, bonded & insured

California CSLB #1036920, serving the area since 2017.

Same-day & emergency

We answer 7 days a week and can often be out the same day.

Local to Sonoma & Marin

Based in Rohnert Park. We know the homes and the water here.

Straight answers, free quotes

We tell you what’s wrong and what it costs before we start.

Reviews

5.0

Rated 5.0 on Google and 4.9 on Yelp

Real reviews from Sonoma and Marin homeowners, on the profiles where they were left.

5.0 on Google
18 reviews from Sonoma and Marin homeowners.
Read our Google reviews
4.9 on Yelp
67 reviews and 45 job photos on our Yelp profile.
Read our Yelp reviews
Licensed, bonded & insured
CSLB #1036920. Family run in Rohnert Park since 2017, serving Sonoma and Marin County 7 days a week.
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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
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  • Real 2026 cost ranges for the big jobs

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