Cost · and where each number came from

What water damage restoration costs in Canada — and whose figures these are

There is a version of this page on every restoration website in Canada. It has a table of average costs on it, and if you follow the table back to where the numbers came from you find either nothing at all or, in the case of the site that competes most directly with this one, the sentence “estimates synthesized from public market data using AI research”.

We are not going to do that. What follows is every restoration figure we can actually stand behind, each one attributed to whoever published it, plus an honest account of what we have not measured. It is a shorter page than the competition's. It is also checkable.

What actually decides the number

Before any figure, the variables. A restoration invoice is not priced off square metres the way a painting job is. It is priced off four things, and the first one dominates.

The category of the water. Under ANSI/IICRC S500, Standard for Professional Water Damage Restoration, fifth edition, this decides whether porous materials are dried in place or removed. Drying drywall and removing drywall are different trades at different prices, and the gap between them is most of the spread in any cost table you will ever read.

The determination is made by a person after an inspection — the standard calls it a “process performed by the restorer to establish the category of water for the purpose of establishing a scope of work” — so it can be explained and, where it looks wrong, questioned. One published document is worth having to hand: in March 2026 the standard’s consensus body ruled that “Top-down water ingress, wind-driven rain and water from weather related events are not automatically considered Category 3 Water”.

How far the water travelled. Under floors, into cavities, down to the level below. This is why the scope frequently exceeds the visible damage and why a moisture map matters more than a walk-through.

What the materials are. Solid hardwood, engineered flooring, plaster, chipboard cabinet carcasses and blown-in insulation all behave differently, and some of them cannot be dried at any price.

How long it sat. Health Canada puts the start of mould growth at 48 hours in an area with excessive moisture, and everything after that window costs more.

Somebody else’s published bands, with their name on them

ProLine Restoration, an Ontario restoration company, publishes severity bands on its own website. We reproduce them here with the company named, which is the entire difference between this page and the competition.

They are one company’s list prices. Not a survey, not an average, not our estimate, and not a quote for your basement. What they are good for is shape: a four-to-one spread between a one-room drying job and a whole-storey rebuild is the right mental model, and the band your loss falls into is decided by the four drivers above rather than by your postal code.

The same company publishes two costs that get left out of most estimates and are worth asking about up front:

The asbestos one is the one that stops a job. In a pre-1990 Canadian home, flooring adhesive, vinyl tile and some drywall compounds are candidates, and no competent contractor will start demolition without knowing.

The one price somebody actually measured

There is exactly one installed price in this whole subject that comes from a public body rather than from a marketing page, and it is Hamilton’s. The City pre-qualified five contractors for its Protective Plumbing Program and publishes what each of them charges.

That is a real number for a real device from named firms. It is also five companies in one city, for one item of work, which is why it appears here as what it is rather than as “the average cost of a backwater valve in Canada”. The dearest firm on the City’s own list is about 21 per cent above the lowest for identical work — which tells you roughly what a national average would be worth even if somebody had computed one honestly.

The number that really does change by city

prolinerestoration.ca tells its readers that location is rarely the main cost driver, and about the restoration invoice it is right. It then stops writing about cities, which is where it is wrong — because the amount a municipality will pay you differs by thousands of dollars inside a single province.

What to ask for, so two quotes are comparable

The reason people ask for an average is that they have two numbers and no way to tell whether they describe the same job. They usually do not. Ask for these and the comparison becomes possible:

1. The category determined, and what it was based on. This is the biggest single line and it is a judgement, not a fact about the water.
2. The affected area, in square metres, by room. Not “the basement”.
3. What is being dried and what is being removed, itemised by material.
4. The drying goal and how it will be measured. Under the standard there should be one.
5. Equipment count and expected days. Air movers and dehumidifiers are usually charged per unit per day.
6. Whether asbestos testing is included, if the house predates 1990.
7. What is excluded. Reconstruction, contents, and reinstating finishes are frequently a separate scope.

Two quotes answering those seven questions can be compared. Two totals cannot.

Questions people actually ask