Basement Waterproofing in Toronto
DryFort crews serve every Toronto neighbourhood with exterior and interior waterproofing, crack repair, and true 24/7 flood response.
The Local Picture
A lot of what we see in Toronto basements traces back to the age of the housing stock. In older neighbourhoods like the Annex, Leslieville and parts of North York, original clay weeping tile has been in the ground for 60–100 years — it corrodes, shifts and collapses, and once that happens the foundation has no working drainage at all. Southern Ontario's clay-heavy soil doesn't help: it expands when wet and shrinks when dry, and that repeated movement is a common cause of the vertical and stair-step cracks we get called out for.
The city's own infrastructure adds a second factor. Parts of the older downtown core still run on combined sewer systems that carry both stormwater and sanitary waste in the same pipe — during a major storm they can back up, which is a big part of why basement flooding protection has been a standing City of Toronto program for years, not a one-off.
That program is worth knowing about before you get quotes: as of the most recent expansion (work completed on or after November 12, 2025), Toronto's Basement Flooding Protection Subsidy Program covers up to $6,650 per property toward eligible work — a plumbing assessment, backwater valve, sump pump, battery backup and weeping tile capping. We factor eligible items into your estimate and help with the paperwork; the program doesn't apply to the membrane waterproofing itself, only the specific eligible components.
Basement Flooding Protection Subsidy Program
Up to $6,650 per property for eligible work completed on or after November 12, 2025: a plumbing assessment (max $500), backwater valve (max $1,600/device, up to 2), sump pump (max $2,250), battery backup (max $300) and weeping tile severance/capping (max $400) — each reimbursed at 80% of invoiced cost.
See the official program page →Services in Toronto
Exterior Foundation Waterproofing
From century homes in the Annex to postwar bungalows in Scarborough, we excavate and seal Toronto foundations for good.
Interior Basement Waterproofing
Tight downtown lots and finished landscaping make interior systems the practical call for a lot of Toronto semis and rowhouses.
24/7 Emergency Flood Response
Our 24/7 line covers every Toronto neighbourhood, from North York to the waterfront, when a basement floods without warning.
Sump Pump Installation & Repair
We size and install sump systems for Toronto basements and help you apply for the City's flooding protection subsidy.
Foundation Crack Repair
Freeze-thaw cycles are hard on Toronto's older concrete and block foundations — we inject and seal cracks for good.
Weeping Tile & Drainage Systems
Collapsed clay weeping tile is common in Toronto's older housing stock — we replace it and correct grading so water moves away from the house.
Toronto Rates
Interior systems start at $120/ft ($2,800 minimum). Final price is confirmed at a free on-site visit — or get an instant estimated range online first.
All of Toronto
- Scarborough
- North York
- Etobicoke
- East York
- Downtown Toronto
- Midtown
Basement Waterproofing FAQs — Toronto
Does Toronto offer a subsidy for basement flooding protection?
Yes. The City's Basement Flooding Protection Subsidy Program covers up to $6,650 per property for work completed on or after November 12, 2025, including a plumbing assessment, backwater valve, sump pump, battery backup and weeping tile capping, each reimbursed at 80% of invoiced cost. It applies to those specific eligible items, not to membrane waterproofing itself. We identify what your job qualifies for and help you apply.
Do I need a permit for exterior waterproofing in Toronto?
It depends on the scope. Simple interior crack injection generally doesn't require a permit. Exterior work that involves excavation, or installing a backwater valve, often does — Toronto requires a building permit for backwater valve installation specifically. We confirm exactly what's required for your job and handle the permit process as part of the quote.
How much does basement waterproofing cost in Toronto?
Exterior waterproofing starts at $275 per linear foot with a $4,000 minimum job, and includes excavation, membrane, drainage board and new weeping tile. Interior systems start at $120 per linear foot with a $2,800 minimum. The exact price depends on depth, access and site conditions, confirmed at a free on-site visit.
How fast can you respond to a flooded basement in Toronto?
Our emergency line is answered 24/7 by a real person, and we dispatch as soon as a crew is available — day or night, weekends and holidays included. Call as soon as you notice water; the faster we get there, the less damage and cleanup.
Wet basement in Toronto? We can fix it.
Get a free, no-obligation quote — or call our 24/7 emergency line right now if water is coming in.