How much does it cost to clean up a flooded basement in Toronto?

Restoration Mate puts a single area or a few small areas at $1,500 to $3,500, and a full finished basement cleaned and rebuilt at $5,000 to $25,000. Ultimate Mold Crew says basement water damage in Toronto commonly costs $2,500 to $10,000 and up. Desa Contracting puts a sewage backup at $5,000 to $30,000 and up, and publishes an all-in rate of $4 to $12 per square foot.

What is the City of Toronto Basement Flooding Protection Subsidy?

It is a rebate the city pays homeowners for flood prevention work, not for cleanup. The published caps are $2,250 toward a sump pump, $300 toward a battery backup, and $6,650 as the maximum per property. It applies inside the City of Toronto only, so a Mississauga or Markham address gets nothing from it. It needs an application, and the rules are the city's to change, so read their page before booking the work.

Does depth matter more than area?

Yes, and it surprises people. Two inches across a whole basement is a different job from two feet in one corner, but the number that decides the method is how far up the wall the water reached, because that sets how much drywall and insulation has to come out. Standard practice is to cut well above the visible waterline, since drywall wicks upward and insulation behind it holds water long after the surface feels dry.

Can I just pump it out and dry it myself?

For clean water, an inch deep, on a concrete floor with nothing finished, plausibly yes. The comparison worth making is against the professional bill: Desa Contracting prices extraction at $500 to $3,000 and industrial drying at $800 to $4,000. This page used to quote a GTA rental day rate and no longer does, because the rental firm it cited now blocks every non-browser request. What you cannot do yourself is prove the wall cavity is dry, and that is the thing that decides whether you get mould in three weeks. The moment carpet, drywall, insulation or anything grey or black is involved, the equation changes: those are not drying problems, they are removal problems.

What does a sump pump cost in Toronto?

This page no longer publishes one. Three sump pump prices from a Toronto plumbing guide were withdrawn in August 2026, when that guide blocked every non-browser request so none could be re-checked, and the one replacement figure that followed was withdrawn in October 2026, when its source stopped publishing prices. What is published is the city's side: caps of $2,250 toward a sump pump and $300 toward a battery backup, inside the City of Toronto, on an application.

Will my insurance cover a flooded basement?

It depends entirely on where the water came from, and the standard Ontario policy covers less of this than most people expect. Water that came up through the drain needs a sewer backup endorsement. Water that ran overland in a storm needs an overland water endorsement. A burst pipe inside the house is usually covered as sudden and accidental. Groundwater seeping through a foundation crack is normally excluded whatever endorsements you hold.

Flooded basement cleanup cost, and what Toronto pays back

A flooded basement produces two bills and they usually arrive months apart. Cleaning up what happened runs $1,500 to $3,500 for a single area, $2,500 to $10,000 and up for moderate to significant damage, and $5,000 to $30,000 when sewage came up the drain. Stopping it happening again is a second bill, for prevention work such as a sump pump or a backwater valve.

The second bill is the one Toronto helps with. The city rebates prevention work up to a published $6,650 per property. This page no longer prices the pump itself, so the calculator covers the cleanup bill.

Page last updated: October 28, 2026By The RestorationIndex Desk

The numbers behind it

$1,500 to $3,500a single area or a few small areas (Restoration Mate)
$5,000 to $30,000sewage backup, Category 3 black water (Desa Contracting)
$2,250the city's published subsidy cap toward a sump pump
$6,650the city's maximum subsidy per property, since May 1, 2026

What will cleaning it up cost?

What is down there?Published Toronto cleanup packages. Depth and what was in the water matter more than floor area.

Cleaning it up

$2,500 to $10,000

Before 13% HST. Published Toronto flood cleanup packages.

Moderate to significant basement water damageUltimate Mold Crew: $2,500 to $10,000

Stopping the next one is a separate bill. This page does not price a sump pump: the figures it used to carry were withdrawn when their sources could no longer be checked, and none has been re-verified since. The City of Toronto's Basement Flooding Protection Subsidy caps are published: up to $2,250 toward a sump pump and $6,650 per property in total, inside the City of Toronto only, on prevention work, with an application.

Why Toronto basements flood, and what the city will pay for

Large parts of Toronto sit on combined or partially separated sewers built for a city with less pavement and gentler storms than the one that exists now. When a summer downpour outruns that system, the water in the pipe finds the lowest opening it can, and in a great many houses the lowest opening is a basement floor drain. That is why the city runs a subsidy at all: every backwater valve and sump pump it helps pay for is a house that stops sending its water back into a full pipe.

The subsidy pays for prevention, never for cleanup. Its published caps are $2,250 toward a sump pump, $300 toward a battery backup and $6,650 as the total per property, the last of which rose on May 1, 2026. It is a City of Toronto program with an application, an inspection and its own conditions, so treat the figure this page shows as the ceiling somebody else has published rather than a cheque you have been promised.

On the cleanup side, the number that decides the method is how high the water got, not how much floor it covered. Drywall wicks upward and the insulation behind it holds water long after the surface feels dry, so a crew cuts well above the visible line and takes out anything porous that sat in grey or black water. That is also what fills the truckloads: carpet, underlay, boxes of paper, mattresses and upholstered furniture do not come back from a sewage backup at any price.

If what came up was sewage rather than storm water, the sewage cleanup calculator prices that specific job, and the full source-cited table behind this page is on the basement flood cost guide.

Frequently asked questions

How much does it cost to clean up a flooded basement in Toronto?: Restoration Mate puts a single area or a few small areas at $1,500 to $3,500, and a full finished basement cleaned and rebuilt at $5,000 to $25,000. Ultimate Mold Crew says basement water damage in Toronto commonly costs $2,500 to $10,000 and up. Desa Contracting puts a sewage backup at $5,000 to $30,000 and up, and publishes an all-in rate of $4 to $12 per square foot.
What is the City of Toronto Basement Flooding Protection Subsidy?: It is a rebate the city pays homeowners for flood prevention work, not for cleanup. The published caps are $2,250 toward a sump pump, $300 toward a battery backup, and $6,650 as the maximum per property. It applies inside the City of Toronto only, so a Mississauga or Markham address gets nothing from it. It needs an application, and the rules are the city's to change, so read their page before booking the work.
Does depth matter more than area?: Yes, and it surprises people. Two inches across a whole basement is a different job from two feet in one corner, but the number that decides the method is how far up the wall the water reached, because that sets how much drywall and insulation has to come out. Standard practice is to cut well above the visible waterline, since drywall wicks upward and insulation behind it holds water long after the surface feels dry.
Can I just pump it out and dry it myself?: For clean water, an inch deep, on a concrete floor with nothing finished, plausibly yes. The comparison worth making is against the professional bill: Desa Contracting prices extraction at $500 to $3,000 and industrial drying at $800 to $4,000. This page used to quote a GTA rental day rate and no longer does, because the rental firm it cited now blocks every non-browser request. What you cannot do yourself is prove the wall cavity is dry, and that is the thing that decides whether you get mould in three weeks. The moment carpet, drywall, insulation or anything grey or black is involved, the equation changes: those are not drying problems, they are removal problems.
What does a sump pump cost in Toronto?: This page no longer publishes one. Three sump pump prices from a Toronto plumbing guide were withdrawn in August 2026, when that guide blocked every non-browser request so none could be re-checked, and the one replacement figure that followed was withdrawn in October 2026, when its source stopped publishing prices. What is published is the city's side: caps of $2,250 toward a sump pump and $300 toward a battery backup, inside the City of Toronto, on an application.
Will my insurance cover a flooded basement?: It depends entirely on where the water came from, and the standard Ontario policy covers less of this than most people expect. Water that came up through the drain needs a sewer backup endorsement. Water that ran overland in a storm needs an overland water endorsement. A burst pipe inside the house is usually covered as sudden and accidental. Groundwater seeping through a foundation crack is normally excluded whatever endorsements you hold.

Where these numbers come from

Cleanup figures are read from RestorationIndex's basement flooding pricing file, last reviewed July 2026, and come from Toronto restoration companies that publish their own rates. Every figure was re-checked in August 2026 against the cached text of the page it is attributed to. Sump pump figures were withdrawn twice: three in August 2026 because their source blocked checking, and the one that replaced them in October 2026 because its source stopped publishing prices. The subsidy caps are the City of Toronto's published figures, shown exactly as the city prints them; the subsidy is a program with an application and its own conditions, not a discount that arrives automatically.

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Water in a basement is a same-day problem

The basement flood cleanup list shows which GTA companies do this, which of them post 24-hour hours, and a quote request for each one.

See basement flood companies