Basement Waterproofing Cost in London (2026)
Average cost in London
$3,500 — $30,000
$60 — $300 per linear ft
Cost Breakdown
ItemizedTrenching and manual/machine digging
40%
Membranes, weeping tiles, sealants
30%
Machinery, shoring, and pumps
15%
City permits, backfilling, landscaping
15%
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
$6,080 — $9,120
Based on 6 sources and market data for London. Actual costs may vary depending on specific project requirements.
🏢Top Waterproofing Contractors in London
Verified providersAdvanced Basement Systems
199 Exeter Rd Unit E, London, ON N6L 1A4, Canada
182 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
Exterior waterproofing typically ranges from $150 to $300 per linear foot. For an average London home, the total project cost usually falls between $15,000 and $25,000 depending on foundation depth and soil conditions.
Yes, interior waterproofing is significantly more affordable because it avoids deep exterior excavation. It generally costs between $60 and $120 per linear foot, bringing a typical project to $3,500 - $10,000.
If you only have a localized leak, foundation crack injections (using epoxy or polyurethane) typically cost between $500 and $1,500 per crack.
Yes, Southwestern Ontario's clay-rich soil holds water against foundations longer and is harder to excavate. This can increase labor costs and require heavier drainage layers compared to sandy soils.
📊Our Methodology
How we collect dataAggregated from 6+ 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: today. Updates run weekly. All costs in CAD.