How Much Does Basement Waterproofing Cost? (2026)

By Carl McDowell | February 28, 2026

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Waterproofing Cost Calculator

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Tel: 416-333-LEAK
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Canada Waterproofers

Is Your Basement at Risk?

Answer 7 quick questions to get your free Basement Health Score and find out what — if anything — needs attention.

⏱ Takes less than 2 minutes  |  🔒 No personal info required to see your results
Canada Waterproofers

Interior vs. Exterior Waterproofing

Answer a few questions about your situation and we'll recommend the best waterproofing approach for your home.

Canada Waterproofers

Spring Flood Risk Checker

Spring is the highest-risk season for basement flooding in the GTA. Find out how prepared your home is before the thaw hits.

🌨️ Based on local GTA spring conditions including snowmelt, freeze-thaw cycles, and seasonal rainfall patterns.
Canada Waterproofers

Water Damage Cost Calculator

See what a single basement flood or ongoing water damage could cost you — versus the price of waterproofing it today.

💧 The average unaddressed basement water damage claim in Ontario costs $43,000+ — often only partially covered by insurance.

EXTERIOR WATERPROOFING COST…

In 2026, exterior basement waterproofing costs typically range from $120 to $400+ per linear foot. For an accurate quote, a free on-site assessment is required.

 

INTERIOR WATERPROOFING COST…

In 2026, interior basement waterproofing costs typically range from $80 to $150+ per linear foot. For a precise quote, a free on-site assessment is required.

 

FOUNDATION CRACK REPAIR COST…

In 2026, foundation crack repairs typically involve a 6-foot section of exterior waterproofing and cost between $1,800 and $2,400+ per crack. A free on-site assessment is required for an accurate quote.

 

FOUNDATION CRACK INJECTION COST…

In 2026, crack injection typically costs between $650 and $1,100 per crack.

 

SUMP PUMP COST…

In 2026, sump pump costs start at $650 for a simple replacement. A full system, including a new sump pit and battery backup sump pump, can cost up to $4,000+

 

BACKWATER VALVE COST…

In 2025, the cost to install a backwater valve depends on the type:

  • Interior backwater valve: $2,000-$3,500+ (plus permit)
  • Exterior backwater valve: $2,700-$4,500+ (plus permit)

A free on-site assessment is recommended to determine which option is best for your property.

 

REBATES AVAILABLE IN THE GTA INCLUDE…
(Toronto)

🌧️Flood Protection Made Affordable!
Own a single-family home, duplex, triplex, or fourplex? You can get up to $3,400 per property to protect your home from flooding, Which is increasing May 1st 2026 to $6,650

This subsidy helps cover:

✔️ Home Plumbing assessment $500 May 1st 2026

✔️ Installing a backwater valve $1,600 May 1st 2026

✔️ Installing a sump pump $2,240 May 1st 2026

✔️ Battery Backup for Sump Pump $300 May 1st 2026

✔️ Foundation Drain / Pipe Severance & Capping $400 May 1st 2026

✔️ Disconnecting and sealing your home's storm sewer or external weeping tile connection

⚠️ Note: disconnecting downspouts from your eavestrough system is not included in this program.

 

(Halton)

Must be an approved contractor of Halton to receive this rebate, Canada Waterproofers is an approved contractor.

💧 Protect Your Home - At No Cost to You!
Halton Region will cover 100% of the cost (materials and labor) to disconnect your weeping tile and install a sump pump - up to $5,000 per home.
Stay dry, save money, and keep your basement safe from flooding!

🚰 Save on Sewer Line Repairs!
Halton Region will cover 50% of the cost (materials and labour) to repair your sanitary lateral - the underground pipe that carries wastewater from your home. That's up to $2,000 in savings!
Keep your home safe, protect your pipes, and reduce repair costs.

🛡️ Stop Sewage Backups Before They Start!
Halton Region can cover 50% of the cost (materials and labour) to install a backwater valve - that's up to $675 in savings.
Keep your basement dry and your home safe from flooding.

(MISSISSAUGA)

🏠 Rebates Up to $8,500 Available!
You may qualify for up to $8,500 to help cover the cost of basement flood prevention.

 

💧 Make Your Home Flood-Ready!
Get help covering the cost of water-resistant upgrades and other flood-prevention improvements.
Receive a rebate for 50% of your expenses, up to $3,000.

Why Finance with Canada Waterproofers

Basement waterproofing is an essential investment in your Milton home's structural integrity and your family's health, but unexpected foundation repairs can strain household budgets. That's why Canada Waterproofers partners with Financeit, one of Canada's leading point-of-sale financing providers serving over 9,000 merchant partners nationwide. This trusted partnership allows Milton homeowners to address water intrusion issues immediately—before foundation damage, mold growth, or structural deterioration escalates repair costs—while spreading payments over flexible terms that fit your monthly budget. Financeit's secure online application takes just minutes to complete from your phone or computer, with credit decisions typically provided within 48 hours and no impact on your credit score for checking eligibility.

Fair and Flexible

Pay it off any time without penalty. No prepayment fees or hidden charges.

Easy and Affordable

0.00% introductory interest rate for 3 month term.* Low monthly payments that fit your budget.

Private and Secure

Bank-level encryption protects your personal information throughout the application process.

Approved plans feature competitive rates lower than typical credit card interest, 3 months no payment and no interest to ease cash flow, payment terms up to 60 months, and the freedom to pay off your balance early without penalties. Whether you're dealing with an emergency basement flood, planning preventative waterproofing before a renovation, or need foundation crack repairs to protect your Milton investment, financing ensures you don't have to choose between your home's safety and your financial stability—you can secure comprehensive, lifetime-warrantied waterproofing protection today and pay affordably over time.

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