Plumber On Dial technician tightening pipe fittings on a service call in Toronto

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Leak Detection & Repair in Toronto

A stain spreading on the ceiling, a damp wall or a water bill that keeps climbing? Licensed Toronto plumbers find hidden leaks with as little opening of walls and ceilings as possible, then fix them.

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Licensed Ontario plumber•WSIB covered•Fully insured•No overtime charges

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Hidden leak detectionCeiling & wall leaksPipe leak repairFlat upfront quote

Find the leak first, then open as little as possible

Water travels. A drip from a pipe or a shower valve can run along a joist and show up as a stain metres away, so the stain is rarely right under the leak. Cutting holes to search for it is expensive and messy.

We trace the leak first, using moisture readings, the layout of the plumbing, and tests on the fixtures and lines above the damage. Once we know where it is, we open only what is needed to reach it and repair it.

Then we check the rest of the run, because an old fitting that has failed often has neighbours of the same age.

Leak services in Toronto

For houses, semis and condo suites, from a drip under the sink to a leak inside a finished ceiling.

Hidden leak detection

Leaks inside walls, ceilings and floors traced to their source with moisture readings and fixture and line testing, before any opening is made.

Ceiling leak repair

Stains or drips from the ceiling, often from a bathroom above: tub overflows, shower valves, toilet seals or supply lines. Found and fixed at the source.

Pipe leak repair

Leaking supply and drain pipes, fittings and joints repaired or replaced, including old galvanized, copper and cast iron sections.

Under-sink and fixture leaks

Dripping traps, loose slip nuts, leaking supply lines and worn shut-off valves under kitchen and bathroom sinks.

Shower and tub leaks

Leaking shower valves, tub spouts and overflows, repaired with as little tile removal as the job allows.

Burst pipe repair

When a pipe bursts, we help you shut off the water, then repair the line as an emergency, day or night, with no overtime charges.

Why leaks hide in Toronto homes

Many Toronto homes have plumbing that has been updated in stages, so it is common to find old galvanized or copper next to newer plastic, with fittings of very different ages. The older joints are where leaks usually start.

In condos, a leak in one suite often shows up first in the unit below. Shutting off water to your suite is the first step, and building management may need to know. Some condos built between about 1995 and 2007 also have Kitec supply lines, whose brass fittings are known to leak; see our Kitec replacement page if you have orange and blue pipes.

Our guide on how to find a hidden water leak covers the checks you can do yourself, including reading your water meter.

Signs of a hidden leak

A water stain on the ceiling or wall that grows or reappears
Bubbling or peeling paint, or soft drywall
A water bill that has gone up with no change in use
The water meter moves when every tap is off
A musty smell or mould in one area
The sound of running water when nothing is on

If water is dripping from a ceiling, turn off the main water valve and keep clear of any light fixtures near the leak.

How we find and fix a leak

1
Call or book online
The dispatch line is answered live 24/7. Tell us where you see water or damage.
2
Trace the source
We check moisture levels, test the fixtures and lines above the damage, and narrow down where the leak is.
3
Flat quote first
You get a fixed price for the repair before any work starts, with no overtime charges.
4
Open only what is needed
We make the smallest opening that reaches the leak.
5
Repair and test
We fix the leak, pressure-test the line and check the surrounding fittings.
6
Next steps
You know exactly what failed and whether anything nearby needs attention.

What affects the cost

Every leak is quoted after we find it, so the price is based on the actual repair. The main factors are:

How hard the leak is to trace, and where it is
What failed: a fitting, a valve, a section of pipe or a fixture seal
How much has to be opened to reach it: none, a small access hole, or tile
The pipe material and whether nearby fittings should be replaced too

There are no dispatch fees or overtime charges. See how our diagnostic and flat pricing works.

Toronto leak jobs, in our customers' words

Recent Google reviews of Plumber On Dial of Toronto for leak detection and repair.

“They tracked down a mystery leak that had been staining our ceiling for weeks. Found it fast, fixed it properly, and kept the drywall cutting to a minimum. Very skilled.”

Benjamin G. · Google review

“They used a moisture meter to find the leak so they didn't have to open up a bunch of walls. Smart.”

Fares T. · Google review

“Hunting for a hidden crawl space leak defeated two other companies. This team pinpointed it right away on visit one. Exceptional diligence.”

Parth K. · Google review

“Leak from the upstairs tub overflow and they fixed it without pulling any tile. Was expecting a much bigger job.”

Euan D. · Google review

“Fixed a leak under our kitchen sink in less than an hour and explained what caused it. Will use again.”

Zahadad J. · Google review

“Pipe burst in the wall while we were away for the weekend. They came out Sunday morning and got the water shut off and the pipe repaired.”

Leonel I. · Google review

Read every review on Plumber On Dial of Toronto on Google.

Leak detection across Toronto

We find and fix leaks in houses, semis, rentals and condos throughout the city, including:

Downtown Toronto
Church-Wellesley
Yorkville
The Annex
Rosedale
Cabbagetown
St. Lawrence
Distillery District
Corktown
Regent Park
Harbourfront
CityPlace
King West
Liberty Village
Queen West
Trinity Bellwoods
Little Italy
Kensington Market
Seaton Village
Dufferin Grove
Roncesvalles
Parkdale
High Park
Riverdale
Leslieville
The Danforth
The Beaches
East York
Leaside
Davisville
Yonge and Eglinton
North Toronto
Forest Hill
Summerhill

Toronto leak detection questions

How do you find a leak inside a wall or ceiling?

We start from the damage and work back: moisture readings show how far the water has spread, and testing the fixtures and lines above narrows down the source. Knowing how the plumbing is laid out lets us open only the spot that reaches the leak.

How can I tell if I have a hidden leak?

Turn off every tap and water-using appliance, then watch the water meter for a few minutes. If it moves, water is going somewhere. Stains, peeling paint, a musty smell or a rising water bill are other signs.

Will you have to cut open my ceiling or wall?

Usually only a small opening, made once we know where the leak is. Some leaks, such as a tub overflow or under-sink fitting, can be reached without opening anything.

How much does leak detection cost in Toronto?

It depends on how hard the leak is to trace, where it is, and what the repair involves. You get a flat price before the repair starts. Our pricing page explains how the diagnostic works.

Water is dripping from my ceiling. What should I do?

Turn off the main water valve, move belongings away, put a bucket under the drip, and keep clear of any light fixtures near the water. If the ceiling is sagging, stay out from under it. Then call us.

Do you handle leaks in condos?

Yes. Shut off water to your suite if you can and let building management know. Tell us your building and unit when you book, and whether management needs notice or proof of insurance.

Helpful guides

Water leaking right now?

Shut off the main valve and call the Toronto dispatch line. A real person answers 24/7.

(647) 557-9713 Book online