Mon–Fri 8:00AM – 5:30PM

Plumbing, Heating & Air Conditioning in Mill Valley, CA

Same-day plumbing, heating, and cooling in Mill Valley — from the redwood canyons to Strawberry, by a licensed local team since 1986.

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Local ExpertsSince 1986
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Mill Valley homes ask a lot of their plumbing and HVAC. A 1920s redwood cottage tucked into a fog-shaded canyon off Cascade has very different needs than a 1960s tract house in Strawberry or Tam Valley with original galvanized supply lines reaching the end of their life. John Owens Services has worked these exact streets since 1986, so we show up knowing the terrain, the housing stock, and the damp microclimate that quietly corrodes pipes and feeds mold behind the wall.

Why Mill Valley Homeowners Choose John Owens

  • Family-run and California-licensed (#501853) since 1986 — the same crews have repiped, reheated, and unclogged homes from Homestead Valley to Alto for decades
  • Same-day service across Mill Valley, with technicians who already know the steep canyon driveways and tight crawlspaces off Cascade, Marion, and Throckmorton
  • a 4.9-star Google rating and happy customers from Marin neighbors who value clear pricing and clean, respectful work in occupied homes
  • One call covers it all — plumbing, water heaters, drains, heating, and cooling — so you are not juggling three contractors for one old house
  • We build for the local climate: corrosion-resistant repipes, sealed drain lines against redwood-root intrusion, and right-sized heat pumps for the fog belt
  • Honest assessments — if a 50-year-old furnace or galvanized run is worth nursing one more season, we will tell you, not just sell you a replacement

Signs You Need Plumbing in Mill Valley

  • Rusty or low-pressure water, especially in older Strawberry and Tam Valley homes — a classic sign aging galvanized pipe is failing from the inside
  • Slow or backing-up drains and recurring sewer-line clogs, often caused by redwood and oak roots working into clay or cast-iron laterals
  • A water heater that runs out fast, leaks, or is well past 10–12 years old in this hard-on-equipment damp climate
  • Rooms that never get warm on a foggy Mt. Tam morning, or a furnace that short-cycles, bangs, or hasn't been serviced in years
  • Musty smells, warped flooring, or staining — Mill Valley's 70–90% winter humidity turns a small hidden leak into mold damage fast

Frequently Asked Questions

Do you offer same-day plumber service in Mill Valley?

Yes. We dispatch same-day for most Mill Valley plumbing calls — burst pipes, water-heater failures, and stubborn drains — and as a licensed contractor (#501853) we arrive ready to diagnose and fix on the first visit.

Can you handle HVAC in Mill Valley homes built into the hills?

Absolutely. HVAC in Mill Valley often means working around tight canyon crawlspaces and the Mt. Tam fog belt, and we size heating and cooling systems for those exact conditions rather than a one-size-fits-all install.

What's the best heating and cooling setup for the Mill Valley climate?

For most of Mill Valley's mild, foggy climate, a properly sized heat pump delivers efficient heating and cooling in one system — we'll assess your home, insulation, and any local rebates before recommending one.

Why do older Mill Valley homes have so many plumbing problems?

Much of Mill Valley's housing dates to the 1920s canyon cottages and 1950s–70s tract era, so original galvanized pipe and cast-iron drains are corroding, while redwood roots invade sewer lines — issues we repair and repipe routinely.

Proudly Serving Marin & Sonoma

From the Marin coast to Sonoma wine country, we bring honest plumbing, heating & cooling to homeowners across both counties — based locally since 1986.

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Schedule service with our trusted local team today.

Serving Marin & Sonoma Counties

Good plumbing, heating, and air conditioning systems are vital in every North California home. John Owens Services, Inc. is proud to be the expert plumbing company you can count on