Window well leak repair in Toronto typically runs $500 to $2,000, with most single-well repairs landing between $700 and $1,300, but the final cost varies a lot depending on job size, scope, and site conditions, so treat any range here as a starting point, not a quote. What actually sets your price is where the water is getting in: the joint between the well and the foundation wall, a blocked or missing drain at the bottom of the well, or groundwater pushing through the wall itself. Those are three different repairs with three different price tags.
What a Window Well Leak Repair Includes
Every repair starts with finding the source, because sealing the wrong thing is how homeowners end up paying twice.
- Water test and inspection, we run water against the well and watch where it enters: the wall joint, a seam in a metal well, the bottom drain, or the window frame itself.
- Soil and gravel excavation, the well gets dug out to the footing so we can see the drain and the full wall joint. You can't fix a bottom drain you can't reach.
- Joint repair, failed sealant and old membrane are cut out, the concrete and well surface are cleaned, and the joint is rebuilt with polyurethane sealant or hydraulic cement plus a bonded membrane.
- Drain work, rodding and flushing an existing drain, or tying a new drain tile into the home's weeping tile system where the original drain was never connected or has collapsed.
- New drainage gravel and filter cloth, clear stone wrapped in filter fabric so silt doesn't clog the drain again in two seasons.
- Re-grading around the well, soil sloped away from the well so surface water doesn't pour in during a summer storm.
- Cover check and adjustment, a cover that doesn't seat properly is a leak source on its own.
If the inspection shows the water is coming through the foundation wall rather than the well, the job moves into basement waterproofing territory (from $1,200), and the price climbs with how much wall is affected and how deep the excavation has to go.
Window Well Leak Repair Pricing in Toronto
Most jobs fall into one of three buckets:
Minor repair, $500 to $800. Re-sealing the well-to-wall joint, replacing failed sealant, re-grading the surrounding soil, and flushing a drain that's silted but intact. Suited to a well that leaks only in heavy rain and shows no water at the bottom. Access matters too: a well tucked under a deck or behind landscaping takes longer to reach than an open one.
Mid-range repair, $800 to $1,500. Excavating the well, rebuilding the joint properly with membrane, and replacing or reconnecting the bottom drain tile. This is the most common outcome for wells older than 20 years, where the original drain has collapsed or was never tied into the weeping tile. Depth and drain condition push the number toward the top of this band and how much soil has to come out are the two biggest swing factors.
Full well rebuild, $1,500 to $2,000. Pulling a rusted or cracked well and replacing it, with new drainage stone, filter cloth, and a properly tied-in drain. A well that also needs raising, or one sitting under a failing masonry opening, adds work.
Related work we quote alongside a leak repair:
- Window well replacement and repair: $500–$2,000. Final cost varies with well size, material, and access.
- Window well covers: $300–$900. Final cost varies with size, material, and custom shapes.
- Window well raising: $800–$1,800. Final cost varies with how much height is added and soil conditions.
- Window well drainage and waterproofing: $500–$3,000. Final cost varies with drain length and whether weeping tile tie-in is needed.
Free on-site estimate · no obligation
What Drives the Cost Up or Down
- Where the water enters. A joint leak is cheap. A leak through the wall is not.
- Drain condition. A silted drain can be flushed. A collapsed drain means excavation to the footing.
- Depth and access. Deep wells in older Toronto neighbourhoods mean more soil excavation and more labour hours.
- Soil type. Toronto's clay-heavy soil holds water against the well instead of draining it, which is why so many wells here fail at the joint rather than the drain.
- Lintel and masonry condition. If the well sits under a masonry opening and the steel lintel above the window is rusting or deflecting, water is likely tracking down from that opening. Rusted lintels get flagged in the quote, not discovered halfway through.
- Whether the well meets current exit sizing. If a repair turns into a rebuild, the well has to serve the window properly under OBC 9.9.10.1, 0.35 m² of clear opening with no single dimension under 380 mm. A well too shallow or too narrow to allow escape means the rebuild scope grows.
- Permits. Replacing a well in kind usually doesn't trigger a permit. Enlarging it, or changing the window opening, does, and we tell you before work starts whether your job needs sign-off from Toronto Building.
How the Repair Process Works
Free site evaluation
We inspect the well, the wall joint, the drain, and the grading, and run a water test. Quote within 48 hours
Written scope
You get the diagnosis in writing, what's leaking, what we'll do, and what it costs, before anything is dug
Excavation
Soil and gravel come out of the well, and the area is protected so debris doesn't end up in the drain
Repair
Joint rebuilt, drain replaced or reconnected, membrane installed
Backfill and grade
New clear stone, filter cloth, and soil sloped away from the well
Water test again
We repeat the test before we leave. If it still leaks, it isn't finished
Cleanup and haul-away
Site left as we found it
Why Choose Egress Window Pros Toronto
We're a family-run basement contractor with 12 years of below-grade work and 400+ egress windows and window wells installed across Toronto and the surrounding area. Leak repair is all we do below grade, we're not a general handyman outfit guessing at drainage.
Every repair is designed for Toronto's freeze-thaw cycle, where water trapped behind a well freezes, expands, and opens the same joint again the following winter. That's why we don't just seal and walk away; the drainage design has to move water out or the repair won't hold. Work is Ontario Building Code compliant, we're licensed, insured, and WSIB covered, and installs carry a 10-year workmanship warranty. We work year-round across the GTA, including Mississauga, Vaughan, Markham, and Richmond Hill.
A leaking window well gets worse, not better, the water finds the same path every rain and softens the soil around the well each time. Book a free site evaluation and you'll have a written quote within 48 hours, with no obligation and no pressure to add work you don't need.
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