Basement Waterproofing Cost in Ottawa (2026)
Average cost in Ottawa
$4,500 — $32,000
$70 — $320 per sq ft
Cost Breakdown
ItemizedExcavation, installation, and site restoration
45%
Membranes, weeping tiles, and gravel
25%
Mini-excavator rental and waste bins
15%
Pump unit, backup battery, and discharge lines
10%
City of Ottawa building permits and inspections
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
$6,400 — $9,600
Based on 9 sources and market data for Ottawa. Actual costs may vary depending on specific project requirements.
📈Price Momentum
Year-over-year~1 year ago
$11,717
Today
$12,279
Basement Waterproofing in Ottawa is ↑ 4.8% compared to roughly a year ago — about $562 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 Ottawa
Verified providersBraden Foundation Construction
5300 Ramsayville Rd, Ottawa, ON K1G 3N4, Canada
106 reviews
Wet Basement Solutions
3591 Innes Rd #4, Orléans, ON K1C 1T1, Canada
129 reviews
Wet Basement Solutions - Dry Basements, For Life
915 Ramsay Concession Rd 1, Carleton Place, ON K7C 0C5, Canada
152 reviews
Action Restoration foundation repair
207 Bank St Ste 311, Ottawa, ON K2P 2N2, Canada
195 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
The Residential Protective Plumbing Program (RPPP) offers rebates up to $3,000 for a sump pump with a new pit and $2,500 for an exterior backwater valve. Building permit fees are also 100% refundable under this program.
Interior drainage systems typically cost $70–$160 per linear foot, whereas exterior excavation and membrane installation range from $180–$320 per linear foot due to Ottawa's deep frost line.
Yes, Ottawa's heavy Leda clay is significantly harder to excavate than sandy soil, often increasing labor and backfill material costs by 10-15% compared to other Ontario regions.
Professional epoxy or polyurethane injections for a single foundation crack in Ottawa typically cost between $450 and $950, depending on the crack's length and accessibility.
📊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: 3 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.