Basement Waterproofing Cost in Toronto (2026)
Average cost in Toronto
$3,000 — $35,000
$70 — $350 per sq ft
Cost Breakdown
ItemizedManual digging, foundation prep, and backfilling
70%
Membranes, weeping tiles, gravel, and sealants
20%
Sump pumps, bin rentals, and machinery
7%
City of Toronto building permits and engineering
3%
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 8 sources and market data for Toronto. Actual costs may vary depending on specific project requirements.
📈Price Momentum
Year-over-year~1 year ago
$12,579
Today
$13,145
Basement Waterproofing in Toronto is ↑ 4.5% compared to roughly a year ago — about $566 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
717 reviews
Direct Basement Waterproofing Toronto
4 Faversham Crescent, Etobicoke, ON M9C 3X4, Canada
297 reviews
Royal Work Basement Waterproofing Toronto
230 Queens Quay W, Toronto, ON M5J 2X1, Canada
428 reviews
Waterproofing PD Basement Waterproofing Toronto
3200 Wharton Way, Mississauga, ON L4X 2C1, Canada
171 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 1st, 2026, the City of Toronto has increased the maximum available rebate to $6,650 per property. This includes up to $2,240 for sump pump installation, $1,600 for backwater valves, and $500 for a professional plumbing assessment.
In 2026, interior waterproofing typically costs between $70 and $150 per linear foot. Exterior waterproofing, which requires excavation, is significantly higher, ranging from $150 to $350+ per linear foot depending on foundation depth and accessibility.
A building permit is generally required if the work involves structural changes or new plumbing like a backwater valve or sump pump. Permit fees in Toronto for 2026 start at a minimum of $214.79, with typical project permit costs ranging from $300 to $500.
Much of Toronto, particularly in Etobicoke and Mississauga, contains heavy clay soil. This soil is harder to excavate and requires more clear-stone backfill for proper drainage, which can increase labor costs by 15-20% compared to sandy soil.
📊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: 4 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.