What is the Basement Waterproofing Cost in Toronto 2025
How Much Does Basement Waterproofing Cost in Toronto & GTA?
Wondering how much it costs to waterproof a basement? When it comes to basement waterproofing in Toronto, costs can vary significantly depending on how your project is scoped. Some homes are priced by the linear foot of affected wall, others receive a flat project quote, and minor issues like cracks or sump pump installs are priced per issue.
Interior Basement Waterproofing Cost
Interior waterproofing starts at $80 to $180+ per linear foot and manages water that enters your basement by redirecting it through a drainage system and sump pump. It’s ideal for finished basements or properties where exterior excavation isn’t possible. We clean and seal foundation walls, apply waterproof membranes, and install an interior weeping tile system.
Interior Waterproofing Cost – From $80–$180+ per linear foot
Exterior Basement Waterproofing Cost
Exterior waterproofing starts at $100 to $350+ per linear foot and protects your home from the outside, stopping water before it reaches the foundation. This involves excavation, wall repair, membrane application, and a full perimeter drainage system. It’s a permanent solution, especially suited for older GTA homes with persistent seepage.
Exterior Waterproofing Cost – From $100–$350+ per linear foot
Cost of Foundation Crack Repair
Foundation crack repair typically ranges from $1,500 to $3,200, depending on the width and depth of the crack. Hairline or structural cracks can lead to leaks or long-term damage if untreated. We use professional-grade epoxy or polyurethane injection to seal and stabilize cracks permanently. This is a fast, effective solution for localized leaks.
Basement Wall Crack Repair Cost – From $1,500-$3,200 (Cost depends on the width and depth of a crack)
Cost of Weeping Tile Installation
Weeping tile installation starts at $30+ per linear foot and helps prevent basement leaks by collecting and redirecting groundwater away from your foundation. Installed either inside or outside the basement, they’re essential for managing water pressure and maintaining a dry, stable structure. Weeping tiles are often paired with sump pumps or full waterproofing systems for long-term protection.
Weeping Tile Installation Cost – From $30+ per linear foot
Cost of Window Well Installation
Window well installation ranges from $1,800 to $3,500+ per unit and is designed to prevent water from pooling around below-grade basement windows. We install heavy-duty, properly drained window wells that channel water away from your foundation while protecting your windows from moisture damage. This service is especially important for homes with older or deeper basements.
Window Well Installation Cost – From $1,800–$3,500+ per unit
Cost of Sump Pump Installation
Sump pump installation typically costs between $700 and $ 4,500 per unit, depending on the model, whether a new sump pit is required, and the complexity of the installation. A sump pump is the core of your basement’s water management system. It removes groundwater collected by weeping tiles before it can flood your space. We offer both standard and backup systems tailored to your home’s needs.
Sump Pump Installation Cost – From $700–$4,500+ per unit
Cost of Crawlspace Encapsulation
Crawlspace encapsulation starts at $30 to $100+ per square foot and seals off your crawlspace from moisture, pests, and mold by installing vapor barriers, insulation, and drainage as needed. This service enhances air quality, improves energy efficiency, and promotes long-term structural health — particularly in older GTA homes with damp or exposed crawl spaces.
Crawlspace Encapsulation Cost – From $30–$100+ per square foot
Cost of Backwater Valve Installation
Backwater valve installation starts at $2,200+ per unit and prevents raw sewage from backing up into your basement during heavy rains or municipal sewer surges. We install city-approved backwater valves with cleanout access and can assist with rebate paperwork where available. This is a must-have for flood-prone areas in Toronto and older homes connected to combined sewers.
Backwater Valve Installation Cost – From $2,200+ per unit
Cost of Basement Underpinning (Lowering)
Basement underpinning (also known as lowering) starts at $80 per square foot and increases ceiling height while adding usable square footage by digging beneath your existing foundation. It’s ideal for homeowners looking to finish a basement, add rental space, or boost property value. We handle all structural work, permits, and inspections from start to finish.
Basement Underpinning Cost – From $80 per square foot
Not Sure Which One Is Right for You?
We offer free basement inspections across Toronto, Mississauga, and the GTA, with clear, honest pricing and no pressure. Our experts will recommend the best basement waterproofing service based on your basement’s condition, usage, and plans.
Exterior vs Interior Basement Waterproofing Cost in Toronto
Choosing the right waterproofing method depends on your basement’s condition, access to foundation walls, and long-term goals. Below is a price breakdown of exterior and interior basement waterproofing, how they work, and what you can expect to pay in the Greater Toronto Area.
| Exterior Basement Waterproofing | Interior Basement Waterproofing | |
|---|---|---|
| Overview | Exterior basement waterproofing is a long-term solution that involves excavating the soil around your foundation and applying a multi-layer waterproofing system from the outside. It’s best suited for homes with recurring seepage, structural concerns, or aging foundations. The overall exterior basement waterproofing cost depends on factors like foundation depth, soil type, accessibility, and landscaping requirements. | Interior basement waterproofing is a non-invasive method used to manage water after it enters the basement. It’s ideal for finished basements or properties with limited exterior access. This method uses drainage channels, waterproof membranes, and a sump pump system. Interior basement waterproofing costs vary based on basement size, condition, and system complexity. |
| Price per linear foot | $100–$350+ per linear foot | $80–$180+ per linear foot |
| Disruption level | High (excavation, landscaping) | Low (minimal interior disruption) |
| Benefits |
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| Installation Time | 5–10 days | 2–5 days |
| How It Works |
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Which Waterproofing Method Should You Choose?
If you want permanent structural protection and don’t mind exterior excavation, go with exterior waterproofing. If you’re looking for a cost-effective solution for a finished basement, interior waterproofing may be the better fit.
What Affects Basement Waterproofing Cost in Toronto?
When estimating the cost of basement waterproofing in Toronto and the GTA, we look at a number of factors that influence both the complexity and final price of your project. These include the type of waterproofing system, foundation depth, property access, existing damage, and any additional services like sump pump installation or basement lowering. Below is a breakdown of the key elements that shape your quote.
Interior and exterior waterproofing differ in method, labour, and materials. Exterior solutions involve excavation and tend to cost more, while interior systems are quicker and less disruptive but require ongoing maintenance.
Foundation depths in Toronto generally range between 5 and 8 feet. Deeper foundations require more labor and materials, which results in a higher cost of basement waterproofing.
Basement waterproofing can include many other services – window well installations, basement underpinning, etc. The more services included, the higher the cost of waterproofing will be.
Small cracks may only need epoxy injection, while larger issues could require full foundation repair or reinforcement. The more damage, the more labour and materials involved.
Using premium materials or including extra components like backwater valves or battery backup sump pumps will increase costs — but may extend system lifespan.
Tight spaces, shared laneways, or poor soil conditions can make excavation harder and increase labour time. Homes with finished basements also require more protective prep before work begins.
Complex jobs may need a larger crew or specialized trades (e.g., concrete cutting, underpinning specialists). This impacts your quote based on duration and trade experience required.
Frequently Asked Questions about Basement Waterproofing Cost Toronto
Is interior or exterior waterproofing more cost-effective?
While interior waterproofing is less expensive initially, exterior waterproofing is often more cost-effective in the long-term. Exterior forms of waterproofing typically need less maintenance than interior ones.
Are there long-term maintenance costs for interior or exterior waterproofing?
Yes, both interior and exterior waterproofing methods require long-term maintenance. Interior waterproofing expenses can be higher than exterior methods as sump pumps and other drainage systems will need to be cleaned occasionally and possibly repairs over time to fix wear and tear.
Can I waterproof my basement myself to save costs?
It’s not recommended to attempt basement waterproofing on your own, especially any form of exterior waterproofing, as this can lead to more extensive and costly damages. Some waterproofing methods, such as applying sealant and epoxy resins to fill and seal cracks or gaps in your basement walls, can be done DIY. However, if the cracks or gaps are a result of a large and more complex issue, failing to have your basement properly assessed can lead to bigger problems with more expensive repairs.
What are the disadvantages of basement waterproofing?
Potential waterproofing disadvantages include:
- High costs
- Landscaping disruptions
- Ongoing maintenance
- Removal and replacement of existing basement finishes
Will a sump pump increase my energy bills?
Yes, a sump pump can increase your energy bills if it runs frequently. It’s important to have your sump pump installed by professional waterproofing experts, as faulty pumps will have to work harder to be effective, which can result in higher hydro expenses.
Which is the cheapest basement waterproofing method?
The least expensive form of basement waterproofing is the application of waterproof paint. The average cost of waterproof paint is $1 to $2 per square foot. However, this method isn’t nearly as effective as others and will not resolve issues with your foundation, leaks, or flooding.
How much does it cost to waterproof a 1,000 sq ft basement?
The cost to waterproof a 1,000 sq ft basement typically ranges from $12,000 to $35,000+ in the Toronto area, depending on whether you choose interior or exterior waterproofing, the foundation type, existing damage, and any additional services like sump pump installation or crack repair. Interior solutions are generally more affordable, while exterior waterproofing offers longer-term protection but involves excavation.
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