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Basement underpinning, waterproofing and drainage across Etobicoke, Toronto and Mississauga. We find what is actually failing before we quote — and sometimes the answer costs a fraction of what you feared.
Basement waterproofing in Etobicoke deals with water getting in. Underpinning deals with a basement too short to use. Most companies in this market sell one and subcontract the other.
DeepLine Waterproofing provides basement underpinning, interior and exterior waterproofing, weeping tile, sump pumps and backwater valves across Etobicoke, Toronto, North York, York, East York and Mississauga. Interior waterproofing runs $80 to $150 per linear foot; exterior runs$150 to $300 per linear foot; underpinning runs$350 to $800 per linear foot.
Etobicoke and York have the oldest housing stock in the city —64.9% of it built before 1981, across 69,595 detached homes. That age shows up as two things: original weeping tile that has quietly stopped draining, and basements built for a furnace rather than for people.
Lower your basement floor two to three feet without losing a single foot of floor width. Underpinning rebuilds the foundation deeper, bay by bay, turning a six-foot cellar into a room that meets Code. In Toronto it runs $350 to $800 per linear foot, and a full lowering lands between $75,000 to $150,000.
Underpinning and basement lowering
Two methods, and they are not interchangeable. Exterior work excavates to the footing and seals the wall itself at $150 to $300 per linear foot. Interior work collects water at the footing and pumps it out at $80 to $150 per linear foot. Which one suits your house depends on access, foundation type and what sits above the wall.
Interior and exterior waterproofing
Weeping tile, sump pumps and backwater valves decide where your water goes. On pre-1980 Toronto housing a great deal of the original tile stopped draining years ago. Sump pumps and backwater valves are also the items the City of Toronto part-funds, up to $6,650 per property.
Weeping tile, sumps and valves
Most foundation cracks are cosmetic shrinkage and cost $450 to $1,100 per crack to seal. A few are structural, and sealing those without addressing the movement wastes the money. We assess direction, width and whether the crack is still moving before recommending anything.
Cracks, crawl spaces and structureA wet basement has six common causes and only two of them need a waterproofing system. The other four are cheaper repairs — downspouts, grading, a window well, a single crack.
Any contractor who quotes a full perimeter before establishing where the water is entering is selling rather than diagnosing. We would rather tell you the fix is $600 of drainage work and be the company you call next time.
Real ranges for everything we do are published on our cost pages, including what the City of Toronto subsidises and what it does not.
Downspouts, grading, window wells, visible cracks. Most wet basements are explained before we go indoors.
Where the staining is, whether the pattern is joint-line or point-source, what the floor drain and any sump are doing.
Named, with the range it costs to fix, and the cheaper options if they apply to your house.
Stating its own units and listing what is in and what is out, so you can compare it against anyone else’s.
Housing age changes the failure mode. 1950s clay weeping tile fails at the joints; 1970s bituminous fibre pipe deforms and delaminates; post-1980 PVC usually has not failed at all.
That is why a York semi and a Mississauga detached need different conversations — and why we write a real page for each city rather than swapping a name in a template.
Our office is at 66 Jutland Rd, Unit 89, Etobicoke, ON M8Z 2G6. You are welcome to visit and talk through a project in person, which is not something most companies in this trade offer.
A full interior drainage system runs $8,000 to $15,000 and a full exterior perimeter $15,000 to $35,000. Per linear foot, interior work is $80 to $150 per linear foot and exterior is $150 to $300 per linear foot. Where the problem is a single crack rather than a system failure, injection is $450 to $1,100 per crack per crack.
Underpinning costs $350 to $800 per linear foot of foundation wall, and a full basement lowering on a Toronto semi runs $75,000 to $150,000 including engineering, permits, excavation, disposal and the new slab.
Etobicoke, Toronto, North York, York, East York and Mississauga. Our office is at 66 Jutland Rd, Unit 89 in Etobicoke, and you are welcome to visit to discuss a project.
No. The Basement Flooding Protection Subsidy covers specific devices only — backwater valves, a sump pump, battery backup, weeping tile severance and a plumbing assessment — to a maximum of $6,650 per property. Interior and exterior waterproofing systems receive nothing.
No. We walk the basement, look at the exterior grading, downspouts and window wells, and tell you what is actually causing the problem before quoting anything.
Free on-site assessment across Etobicoke, Toronto, North York, York, East York and Mississauga.