Basement Waterproofing Cost in Toronto (2026)

In 2026, interior waterproofing in Toronto typically costs between $70 and $150 per linear foot. Exterior waterproofing, which requires full foundation excavation, is more expensive and ranges from $150 to $350 per linear foot.

For a standard 1,000 sq ft basement (approximately 140 linear feet of foundation), a full exterior waterproofing project typically costs between $15,000 and $35,000, whereas an interior drainage system ranges from $7,000 to $15,000.

Yes, homeowners can reduce their out-of-pocket expenses through the City of Toronto Basement Flooding Protection Subsidy Program, which offers rebates up to $6,650 for various flood protection measures, including up to $1,250 specifically for sump pump installations.

Yes, homes in areas with heavy clay soil (common in Etobicoke and Mississauga) or tight urban lots in downtown Toronto often require manual hand-digging instead of machine excavation. This restricted access and difficult soil can add a 20% to 30% surcharge to the total project bill.