Basement Waterproofing Cost in Toronto (2026)
Average cost in Toronto
$3,000 — $35,000
$70 — $250 per sq ft
Cost Breakdown
ItemizedExcavation, backfill, and site prep
55%
Membranes, weeping tiles, and gravel
25%
Machinery rental and debris removal
10%
City of Toronto building permits
5%
Sump pump and backwater valve units
5%
HST at 13%
📋What's Included
ScopeTypically Includes
- Interior drain tile system
- Sump pump installation
- Vapor barrier
- Crack injection sealing
- Labor
Typically Excludes
- Exterior excavation waterproofing
- Foundation repair
- Mold remediation
- Dehumidifier
- Landscaping restoration
Based on interior waterproofing for a standard 800-1,000 sq ft basement.
🧮Estimate Your Cost
InteractiveEstimated Cost
$7,040 — $10,560
Based on 12 sources and market data for Toronto. Actual costs may vary depending on specific project requirements.
📈Price Momentum
Year-over-year~1 year ago
$12,101
Today
$12,694
Basement Waterproofing in Toronto is ↑ 4.9% compared to roughly a year ago — about $593 more on the average project.
Comparison derived from the year-over-year change rate, not a month-by-month price index. We don't store historical snapshots yet — when we do, this will become a real time series.
🏢Top Waterproofing Contractors in Toronto
Verified providersAquatech Basement Waterproofing Toronto
20 Hyde Ave, York, ON M6M 1J3, Canada
737 reviews
Direct Basement Waterproofing Toronto
4 Faversham Crescent, Etobicoke, ON M9C 3X4, Canada
307 reviews
Royal Work Basement Waterproofing Toronto
230 Queens Quay W, Toronto, ON M5J 2X1, Canada
440 reviews
Waterproofing PD Basement Waterproofing Mississauga
3200 Wharton Way, Mississauga, ON L4X 2C1, Canada
172 reviews
Provider data sourced from public business directories. Ratings and reviews are public and may change. LookupCost is not affiliated with listed providers.
💬What People Actually Paid
Community❓Common Questions
As of May 1, 2026, the City of Toronto doubled the Basement Flooding Protection Subsidy cap to $6,650 per property, covering up to 80% of costs for backwater valves, sump pumps, and pipe severance.
In 2026, interior waterproofing typically ranges from $70 to $150 per linear foot, while exterior excavation and membrane application costs between $150 and $250+ per linear foot.
Costs increase significantly for foundations deeper than 6 feet (common in 9ft basements), properties with heavy clay soil (common in Etobicoke), and narrow downtown alleys that require manual hand-digging instead of machinery.
Yes, exterior waterproofing involving excavation typically requires a building permit from the City of Toronto, which generally costs between $300 and $1,500 depending on the scope of work.
📊Our Methodology
How we collect dataAggregated from 5+ verified web sources and cost databases
Licensed contractor estimates and regional cost guides
Government construction and labor statistics
Community-reported project costs and reviews
Last data collection: 2 weeks ago. Updates run weekly. All costs in CAD.
About this data
Cost figures are estimates synthesized from public market data using AI research and refreshed regularly. Real project costs vary by scope, materials, contractor, and site conditions. Always get verified quotes from licensed contractors for your specific project.
Spotted bad data? Let us know — we'll review and update.