Emergency and frozen pipe repair

The most useful thing on this page is not the price. It is knowing where your shut-off valve is before you need it, and knowing which side of the property line a frozen pipe sits on, because that decides who pays.

The first ten minutes. Close the main shut-off valve inside the house, which in a Barrhaven home is usually beside the water meter in the basement mechanical room. Open the lowest cold tap in the house to drain the system and drop the pressure. If water is near electrical panels or outlets, cut the power to those circuits before you go near the water. Then photograph everything, because your insurer will want it. If the leak is on the City side, or a frozen service has left you with no water at all, call 3-1-1.

Frozen pipes, and the line that decides who pays. The City's position is clear: a homeowner is responsible for the water service from the property line to the basement or the water meter, and the City's responsibility runs from the stand post or property line back out to the water main (City of Ottawa, Cold weather, warm pipes). Where thawing has to happen on private property, the City charges the cost of work plus 15 per cent, and properties on private streets get no inspection or thawing service at all (City of Ottawa, Frozen water service pipes). That is the single most expensive sentence in an Ottawa winter and it is worth reading twice.

The run-water advisory, and who pays for the water. When frost reaches a depth that puts vulnerable properties at risk, the City issues a seasonal run water advisory to those properties in writing. If the City has identified the risk as being on municipal property, you are not charged extra for the cost of running your water, and your bill is calculated on your previous consumption pattern with adjustments made between late spring and early summer. If the freezing is on your private side, you cover the cost of running the water yourself (City of Ottawa, Frozen water service pipes). The City begins monitoring frost depth using Environment Canada data once daily temperatures consistently drop below zero degrees Celsius.

Prevention, as the City sets it out. Keep the house at 8 degrees Celsius or more even when away. Leave doors open to spaces holding water lines. Insulate pipes near exterior walls and in crawl spaces. Keep the garage door shut. Disconnect outdoor hoses, because a connected hose stops the tap draining. Leave the water service buried, since snow insulates it and clearing snow lets frost drive down. And find your shut-off valve (City of Ottawa, Cold weather, warm pipes).

Thawing, and the thing not to do. Interior pipes can be thawed with a heating pad, a hair dryer or a space heater, working from the tap end back toward the frozen section so meltwater has somewhere to go. Never use an open flame to thaw a frozen water pipe (City of Ottawa, Frozen water service pipes). A blowtorch in a stud bay is how a frozen pipe becomes a house fire, and it happens in this city every winter.

What the repair involves. A burst copper line is cut back to sound pipe and repaired with soldered or press fittings, or converted to PEX where access is poor. A split PEX line is cut out and re-crimped. Then the wall or ceiling has to be opened to find it and closed afterwards, often by a separate trade. Expect drywall repair to be quoted apart from the plumbing.

How long it takes. A burst pipe with accessible piping is one to three hours. Locating a leak inside a finished wall can take longer than repairing it. A frozen private-side service is usually a half day, and a hard freeze at depth sometimes has to wait for the thaw.

What it costs in Ottawa in 2026. Indicative. An after-hours callout is commonly $200 to $400 before any work, which is normal rather than a markup. A burst pipe repair with accessible piping, $400 to $1,200. Leak detection inside a finished wall, $300 to $800. A failed main shut-off valve replaced, $500 to $1,200. Thawing a frozen private-side service, $500 to $2,000. Drywall and finish repairs are separate.

What makes Barrhaven different. Housing age cuts both ways. Most of Barrhaven went up from the late 1980s onward, so supply piping is copper or PEX and the failure mode is a frozen line rather than a corroded pipe. What Barrhaven does have: water meters in unfinished corners of cool basements, garages inside the house envelope with plumbing in the adjoining wall, and long service runs across wide front lawns. Add the clay, which shrinks and swells seasonally (NRC, Geotechnical properties of Leda clay in the Ottawa area) and moves buried services.

Which credential to ask for. Plumber is a compulsory trade in Ontario, trade code 306A, so a person must hold a Registered Training Agreement, a Provisional Certificate of Qualification or a Certificate of Qualification to practise it legally. The apprenticeship runs 9,000 hours, and a Certificate of Qualification must be renewed to stay valid. Holders appear on the Skilled Trades Ontario public register (Skilled Trades Ontario, Plumber, trade code 306A). Ask for the number, including at two in the morning, along with liability insurance and WSIB coverage, compulsory for most sole proprietors in construction since 5 December 2024 (WSIB, Expanded Compulsory Coverage in Construction).

What to ask before you agree to work. What is the callout charge and does it come off the repair. Is this my side of the property line or the City's. What is your 306A number. Quoted or hourly, and what is the after-hours rate. Does the price include opening and closing the wall. Will you give me photographs and a written invoice naming the cause, because my insurer will ask.