Basement Waterproofing Cost in Oshawa (2026)
Average cost in Oshawa
$5,000 — $30,000
$70 — $250 per linear ft
Cost Breakdown
ItemizedDigging, wall prep, and installation
55%
Membranes, weeping tiles, and sealants
25%
Sump pumps and machinery rental
15%
City of Oshawa permits
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
$6,592 — $9,888
Based on 8 sources and market data for Oshawa. Actual costs may vary depending on specific project requirements.
🏢Top Waterproofing Contractors in Oshawa
Verified providersAquaphobia Foundation Repair & Crack Injections
Bowmanville, ON L1C 5C9, Canada
107 reviews
Dryshield Basement Waterproofing Oshawa
89 Varcoe Rd, Courtice, ON L1E 1N2, Canada
18 reviews
Duggans Waterproofing Inc
701 Rossland Rd E Suite 633, Whitby, ON L1N 8Y9, Canada
18 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
In Oshawa, exterior waterproofing typically costs between $95 and $250 per linear foot. The price varies based on foundation depth and the heavy clay soil common in the area, which can increase excavation labor.
Yes, interior waterproofing is significantly more affordable, generally ranging from $70 to $150 per linear foot. It avoids costly exterior excavation but manages water from the inside rather than stopping it at the source.
A standard sump pump installation in Oshawa ranges from $1,000 to $3,000. The cost depends on the pump model, whether a new pit needs to be dug, and if a battery backup system is included.
Most homeowners in Oshawa spend between $5,000 and $20,000 for basement waterproofing. A full exterior excavation for a standard home typically averages around $15,000 to $25,000, while interior systems average $3,500 to $10,000.
📊Our Methodology
How we collect dataAggregated from 8+ 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.