Basement Waterproofing Cost in St. John's (2026)
Average cost in St. John's
$3,500 — $22,000
$75 — $275 per sq ft
Cost Breakdown
ItemizedHand digging and machine excavation
50%
Membranes, weeping tiles, and gravel
30%
Pump unit and basin installation
15%
City of St. John's 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 8 sources and market data for St. John's. Actual costs may vary depending on specific project requirements.
📈Price Momentum
Year-over-year~1 year ago
$9,443
Today
$10,349
Basement Waterproofing in St. John's is ↑ 9.6% compared to roughly a year ago — about $906 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 St. John's
Verified providersWise Cracks NL
155 Torbay Rd Ste 51024, St. John's, NL A1A 5G6, Canada
160 reviews
PuroClean Restoration Avalon
21 Pippy Pl Suite 204, St. John's, NL A1B 3X2, Canada
42 reviews
DEHTEROV Services - Renovations and Design
44a Lady Anderson Street, St. John's, NL A1B 0G8, Canada
15 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
While St. John's does not have a dedicated flood subsidy like Toronto, homeowners can access the 'takeCHARGE' program for basement insulation rebates up to $1,000 (75% of costs) when combined with waterproofing, and low-income grants up to $5,000 via the HESP program.
In 2026, a professional sump pump installation in St. John's typically ranges from $1,200 to $3,500 CAD, depending on whether a new pit must be excavated into the local rocky substrate.
The primary driver is the 'The Rock's' geography; excavation often requires specialized equipment for rocky soil or shale, and the high annual precipitation (1,500mm+) necessitates heavy-duty exterior membranes and drainage systems.
Interior drainage systems (French drains) typically cost $3,500 to $9,000 CAD, whereas full exterior excavation and membrane application ranges from $10,000 to over $22,000 CAD for a standard detached home.
📊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: 2 weeks 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.