Toronto Waterproofing Prices
Last updated: By Below-Grade Records Desk
Below-grade work is one of the few home repairs where a homeowner has no instinct for the right number, which is exactly the condition a bad quote needs. These guides fix that. Every price is in Canadian dollars, carries the name of the Ontario contractor or authority that published it, and states the unit it was quoted in. Where sources disagreed, WaterproofingIndex widened the range instead of picking a favourite, and 13% HST is noted wherever it applies.
Which guide covers your job?
8 researched pricing guides for the Greater Toronto Area, each with a source-cited price table, the Ontario rules that move the number, and local questions answered. Dataset stamped August 2026.
Basement Waterproofing costs
Interior drainage runs $50 to $180 per linear foot; exterior excavation and membrane runs $150 to $475.
Foundation Repair costs
Injecting a leaking crack runs $750 to $1,000; rebuilding a failed foundation wall runs $15,000 to $40,000.
Weeping Tile & Drainage costs
Exterior weeping tile replacement runs $200 to $450 per linear foot; interior drainage runs $70 to $150.
Sump Pumps & Backwater Valves costs
A sump pump in an existing pit runs $1,400 to $2,400; a mainline backwater valve runs $2,800 to $4,200.
Underpinning & Basement Lowering costs
Underpinning runs $50 to $80 per square foot of basement floor; bench footing runs $35 to $60.
Crawl Space Waterproofing costs
Crawl space encapsulation runs $7 to $10 per square foot, or $5,000 to $15,000 and up per project.
Foundation Crack Injection costs
One injected crack runs $300 to $1,500; a visit covering one to three cracks runs $800 to $3,500.
Basement Walkouts & Entrances costs
A side entrance runs $18,000 to $28,000; a walk-up stairwell runs $22,000 to $45,000.
Weighing one repair against another?
Side-by-side cost and lifespan breakdowns for the choices that come up when a contractor offers two ways to fix the same basement.
Frequently asked questions
Where does each number come from?
- A published Ontario contractor or authority page, named beside the figure it produced. Nothing on these pages is estimated, averaged out of thin air or carried over from a US price list, because American basement pricing does not survive the trip across the border. Where two Canadian sources disagreed, the range was widened to hold both rather than one being chosen as the winner.
Is HST included in these prices?
- No, unless a row says so. Ontario applies 13% HST to this work, and contractor price lists are usually quoted before tax. Add it before you compare two quotes, and check which side of the tax line each quote sits on, because that alone can explain a difference that looks like a discount.
Why are the units different from guide to guide?
- Because the trades price differently. Exterior wall work is normally quoted per linear foot of wall, encapsulation and floor work per square foot, injection per crack, and pumps and valves per installed unit. Comparing a per-foot quote against a whole-job quote is the most common way a homeowner talks themselves into the wrong number, so each table states its unit on every row.
Will my quote land inside the published range?
- Often, but a range is not a quote. Depth of the basement, access for a machine, what is buried against the wall, the state of the existing drain and how much finished space has to come out all move the figure. Use the guides to judge whether a quote is in the right neighbourhood and to see which line items should be itemised, then let the contractor price your actual house.