Basement Waterproofing Cost in St. John's (2026)
Average cost in St. John's
$9,360 — $35,100
$72 — $270 per linear ft
Cost Breakdown
ItemizedExcavation, installation, and backfill
50%
Membranes, weeping tiles, sealants, and gravel
30%
Excavator rental and soil removal
15%
Local municipal building permits
5%
HST at 15%
📋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
$5,632 — $8,448
Based on 5 sources and market data for St. John's. Actual costs may vary depending on specific project requirements.
🏢Top Waterproofing Contractors in St. John's
Verified providersPaul Davis Restoration of St. Johns, NL
2 Bruce St, Mount Pearl, NL A1N 4T3, Canada
14 reviews
Wise Cracks NL
155 Torbay Rd Suite 51024, St. John's, NL A1A 5G6, Canada
157 reviews
PuroClean Restoration Avalon
21 Pippy Pl Suite 204, St. John's, NL A1B 3X2, Canada
40 reviews
BELFOR Property Restoration
155 McNamara Dr, Paradise, NL A1L 0A7, Canada
82 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 St. John's, basement waterproofing typically ranges from $72 to $270 per linear foot, with an average cost of around $135 per linear foot depending on whether you choose interior or exterior methods.
For a standard 1,000 square foot basement (approximately 130 linear feet of perimeter), homeowners in St. John's can expect to pay between $9,360 for basic interior systems and up to $35,100 for comprehensive exterior excavation and waterproofing.
Yes, exterior waterproofing is significantly more expensive due to the heavy labor and excavation required. Interior systems average $70 to $150 per linear foot, while exterior excavation in St. John's typically costs $100 to $300 per linear foot.
Given St. John's heavy rainfall and freeze-thaw cycles, a sump pump is highly recommended to manage water tables. Installing a new sump pump system typically adds between $565 and $3,500 to your total waterproofing project.
📊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: today. Updates run weekly. All costs in CAD.