Leak detection and leak repair in Mill Valley, served from our San Rafael office. Call us to ask about same-day service when the schedule allows.
Leak detection in Mill Valley starts with a plain question: where is the water going? A bill that climbed for no reason, a meter that keeps turning with every fixture off, or a warm spot on the floor all point to a leak you cannot see. Catching it early keeps a small leak from turning into mold or damaged framing.
Our crew comes from the San Rafael office and uses video, acoustic and tracer gas equipment to find the leak inside walls, under slabs and along buried lines. We also trace gas leaks, radiant heating leaks and AC leaks. We pinpoint the spot first, so any opening in your wall or floor stays as small as the repair allows.
Then we tell you what we found. If it needs water leak repair or pipe leak repair, we can do that too, following the John Owens Way: maintain first, repair when needed, replace last. See our Plumbing Repair page or our Leak Detection Services overview for more.
Maintain first, repair when needed, replace last. That is the John Owens Way, and it guides how we handle a leak from the first test to the last fitting.
Yes. Radiant heating pipes run under floors and inside slabs, so a leak there can be hard to spot. We use acoustic listening equipment and video leak detection to locate the leaking section, then explain what access the repair needs. Warm patches on the floor or a heating system that loses water are common clues.
We locate the leak before any demolition begins, using acoustic equipment, thermal imaging and tracer gas. Once we know the exact spot, we explain what opening is needed for the repair. The aim is to keep that opening as small as the job allows, not to open up the whole floor.
Yes. If you smell gas, leave the home right away, avoid sparks or flames, and call your gas utility. Once the area is safe, we can inspect your gas piping and locate the leak. Gas leak sensors can also be installed to warn you earlier if a problem returns.
We explain where the leak is and what caused it, then talk through water leak repair options. Because we are also a plumbing contractor, we can make the repair ourselves instead of sending you to someone new. Senior and veteran customers receive $50 off any repair, and financing is available for larger work.
Yes. We perform AC leak detection when a refrigerant or condensate line problem is affecting how your system cools. Water stains near an air handler or weak cooling can be signs. We find the source first, so you know what needs attention before any work is planned.
In the last two years our technicians completed 44 leak detection jobs at Mill Valley homes, most recently in October 2026.
Most of that work is in Mill Valley ZIP code 94941.
Counts are completed jobs from our own service records, updated October 2026.
From the Marin coast to Sonoma wine country, we bring honest plumbing, heating & cooling to homeowners across both counties — based locally since 1986.