Basement Waterproofing Cost in Toronto (2026)
Average cost in Toronto
$5,000 — $42,000
$100 — $300 per sq ft
Cost Breakdown
ItemizedExcavation, installation, and backfilling
48%
Membranes, weeping tiles, and gravel
24%
Shoring, bin rentals, and soil removal
13%
Hardware for flood prevention
10%
City permits and engineering fees
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 9 sources and market data for Toronto. Actual costs may vary depending on specific project requirements.
📈Price Momentum
Year-over-year~1 year ago
$16,036
Today
$16,758
Basement Waterproofing in Toronto is ↑ 4.5% compared to roughly a year ago — about $722 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
862 reviews
Royal Work Basement Waterproofing Toronto
230 Queens Quay W, Toronto, ON M5J 2X1, Canada
464 reviews
Direct Basement Waterproofing
4 Faversham Crescent, Etobicoke, ON M9C 3X4, Canada
310 reviews
Direct Basement Waterproofing Toronto
2 St Clair Ave W 18th Floor, Toronto, ON M4V 1L5, Canada
134 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's Basement Flooding Protection Subsidy Program offers up to $6,650 per property, covering 80% of eligible costs for sump pumps, backwater valves, and pipe capping.
Interior waterproofing typically costs between $70 and $150 per linear foot, while exterior waterproofing ranges from $150 to over $300 per linear foot due to excavation requirements.
A professional sump pump installation in Toronto currently averages between $1,200 and $3,500, depending on whether a new pit is required and if a battery backup system is included.
A City of Toronto building permit is mandatory for backwater valve installations (costing approx. $150-$300), but standard exterior foundation repairs usually do not require one unless structural changes are made.
📊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: 3 days 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.