A Basement Waterproofing Company That Fixes the Cause, Not the Symptom
Water in a basement almost always has a clear path: a cracked foundation wall, a clogged or collapsed weeping tile, a leaking window well, a joint between the wall and floor, or a city sewer that backs up in a storm. Leaquida is a Toronto basement waterproofing company that starts every job by finding that path, then explains it to you in plain words before any work begins.
From there we recommend the right basement waterproofing system for your home — exterior excavation with a membrane and new weeping tile, interior drainage with a sump pump, crack injection, a backwater valve or a combination. You get one written quote, one crew and one warranty.
If you are searching for basement waterproofing near me anywhere in Toronto or the GTA, our crews work across Etobicoke, North York, Scarborough, Mississauga, Brampton, Vaughan, Markham, Richmond Hill, Oakville, Burlington and Milton.
Waterproofing Services for Toronto Homes
Residential waterproofing for houses of every age — from pre-war homes with stone foundations to newer subdivisions with poured concrete.
From $100 / lin. ftExterior Basement Waterproofing
We dig down to the footing, clean and repair the wall, apply a waterproof membrane and install new weeping tile.
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Free estimateFoundation Waterproofing
Membrane and drainage board that keep groundwater off the concrete and stop seepage through the wall.
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Free estimateFrench Drain & Weeping Tile
New perforated weeping tile in clear gravel that carries water away from the foundation.
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From $500 / unitSump Pump Installation
A sealed basin, a reliable pump and a proper discharge line — with optional battery backup.
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Free estimateWindow Well Installation
New window wells tied into the drainage, so basement windows stop letting water in.
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Free estimateFoundation Repair
Repairs to damaged foundation walls and fresh parging that protects the wall above grade.
Learn more →Interior vs Exterior Basement Waterproofing
Both methods work. The right one depends on where the water comes in, how your basement is finished and what is around the house.
| Exterior waterproofing | Interior waterproofing | |
|---|---|---|
| How it works | Excavate to the footing, seal the wall with a membrane, add drainage board and new weeping tile | Open the floor along the wall, install drainage that leads water to a sump pump |
| Stops water | Before it reaches the foundation wall | After it enters, before it reaches the floor |
| Best for | Leaking walls, failed weeping tile, unfinished or soon-to-be-finished basements | Finished exteriors, tight lots, driveways or decks next to the wall |
| Disruption | Yard and landscaping along the wall | Inside the basement along the work area |
| Typical cost in Toronto | $100 – $250 per linear foot | $50 – $120 per linear foot |
| Often combined with | Window wells, parging, crack repair | Sump pump, battery backup, backwater valve |
Costs are approximate ranges for Toronto. Your price is confirmed in a written quote after a free on-site inspection.
What Is Causing Your Wet Basement?
A quick guide to the most common basement water problems we see in Toronto homes and how we fix them.
| What you see | Likely cause | How we fix it |
|---|---|---|
| Water where the floor meets the wall | Hydrostatic pressure, clogged or broken weeping tile | Exterior weeping tile replacement or interior drainage with a sump pump |
| Water running down a wall crack | Shrinkage or settlement crack in the foundation | Foundation crack injection, exterior membrane on the affected wall |
| Water below a basement window | Window well without drainage or a failed seal | New window well connected to the weeping tile |
| Water coming up the floor drain in storms | City sewer backing up into the house | Backwater valve installation — eligible for the city subsidy |
| Damp walls, musty smell, white residue | Moisture moving through an unprotected foundation wall | Foundation waterproofing with membrane and drainage board |
| Sump pit overflowing or pump always running | Undersized or failing pump, poor discharge | New sump pump, sealed basin, battery backup |
Recent Basement Waterproofing Projects in the GTA
Real photos from our job sites — no stock images.
Signs Your Basement Needs Waterproofing
Most leaks start small. Catching them early keeps the repair smaller and cheaper.
Puddles after rain
Water on the floor or along the walls after rainfall or snowmelt.
Stains and white residue
Tide marks, peeling paint or efflorescence on foundation walls.
Musty smell or mould
Persistent odour and mildew caused by high humidity.
Cracks in walls or floor
Hairline or growing cracks in the foundation or slab.
Soft, wet soil outside
Saturated soil or pooling water next to the foundation.
Sewer backup in storms
Water or sewage coming up through the floor drain.
From First Call to a Dry Basement
Free inspection
We check the basement and the outside of the house to find where water gets in.
Written plan & quote
You get the scope of work, price and warranty terms in writing.
Site protection
We protect your property and prepare the work area before we start.
Installation
Our own crew completes the waterproofing with proven materials.
Final check & clean-up
We test the system, clean up and walk you through the finished job.
How Much Does Basement Waterproofing Cost in Toronto?
The final price depends on the method, the length of wall, depth, access and the condition of the foundation. Typical ranges for 2026:
| Waterproofing service | Cost range | Average project |
|---|---|---|
| Interior waterproofing | $50 – $120 per lin. ft | $3,000 – $18,000+ |
| Exterior waterproofing | $100 – $250 per lin. ft | $10,000 – $35,000 |
| Foundation crack repair | $500 – $1,500 per crack | Depends on depth |
| Sump pump installation | $500 – $3,900 per unit | New pit may apply |
| Backwater valve | $2,000 – $4,200 per unit | City subsidy available |
These are approximate ranges, not a quote. Furniture, finished walls, landscaping, driveways and extra components (battery backup, discharge lines) change the price. We confirm everything in writing after a free inspection.
Every job comes with a written warrantyOur Waterproofing Warranty & Service Guarantee
Every project completed by Leaquida Waterproofing comes with a written warranty covering both materials and workmanship. Warranty terms depend on the type of service — from foundation crack repair to full basement waterproofing — and are stated clearly in your contract.
If anything comes up after the job is finished, our team comes back to inspect it and fix it promptly. We build long-term solutions, not temporary patches.
- Warranty terms written into your contract
- Covers materials and workmanship
- Direct contact with the crew that did the work
Up to $6,650 Back From the City of Toronto
The Basement Flooding Protection Subsidy Program helps Toronto homeowners pay for flood-prevention work. We install the eligible systems and help you prepare the paperwork.
| Eligible work | Maximum subsidy | How Leaquida helps |
|---|---|---|
| Home plumbing assessment | Up to $500 | We inspect the plumbing and drains and explain what qualifies |
| Backwater valves (incl. alarm) | Up to $1,600 each, max. 2 ($3,200) | Installation, permit and the invoice details the city asks for |
| Sump pump (incl. alarm) | Up to $2,250 | Sealed basin, pump and discharge set up to city requirements |
| Sump pump battery backup | Up to $300 | Battery backup so the pump keeps working in a power outage |
| Weeping tile severance & capping | Up to $400 | Disconnecting the foundation drain from the city sewer |
| Total per property | Up to $6,650 | One quote that lists all eligible items |
The city covers 80% of the invoice, up to the limits above, for eligible work completed on or after November 12, 2025. Program limits and rules are set by the City of Toronto and can change. Check the current terms on toronto.ca before you apply.
Why Homeowners Choose Leaquida Waterproofing
We are not the biggest waterproofing company in Toronto — and that is the point. You deal with the same people from inspection to clean-up.
Honest diagnosis
We tell you what is causing the water and what can wait — even if it means a smaller job.
Up-front pricing
A clear written quote with no hidden costs and no overtime charges.
Licensed & insured
All required licences and liability insurance on every project.
Written warranty
Materials and workmanship covered, with terms written into your contract.
Our own crew
Trained crews who handle every basement type, old and new.
Proven materials
Membranes, drainage board and weeping tile built for Toronto clay soil and freeze–thaw.
Clean job sites
We protect your property and leave it clean when the job is done.
Easy payment
Cheque, cash, Visa, Mastercard and American Express.
Basement Waterproofing Across Toronto & the GTA
Our office is in Etobicoke. We serve homeowners across the city and the Greater Toronto Area.
Basement Waterproofing Questions, Answered
How much does basement waterproofing cost in Toronto?
Interior waterproofing usually costs $50–$120 per linear foot and exterior waterproofing $100–$250 per linear foot. Most full projects fall between $3,000 and $35,000 depending on the method, wall length, depth and access. We give you an exact price in writing after a free inspection.
Is interior or exterior basement waterproofing better?
Exterior waterproofing stops water before it reaches the foundation and is the most complete fix for leaking walls. Interior waterproofing manages water that gets in and sends it to a sump pump; it is less disruptive outside and often more affordable. After the inspection we recommend the option that fits your home.
How long does basement waterproofing take?
It depends on the method and the size of the job. Crack repairs and sump pump installs are usually short jobs, while full exterior or interior systems take longer. Your written quote includes the expected schedule.
Do you offer a warranty?
Yes. Every project comes with a written warranty covering materials and workmanship. The warranty terms depend on the service and are written into your contract.
Can I get the City of Toronto basement flooding subsidy?
Toronto homeowners can receive up to $6,650 per property for eligible work such as backwater valves, sump pumps and weeping tile severance. We install the eligible systems and help you prepare the documents the city requires.
Can you waterproof a finished basement?
Yes. Exterior waterproofing is done from outside, so finished walls inside usually stay untouched. If interior work is needed, we only open the area along the affected walls and explain exactly what will be removed and restored.
Do I need a permit?
Some work needs a permit — for example, backwater valve installation in Toronto. Where a permit is required, we arrange it as part of the job.
Which areas do you serve?
We work across Toronto — including Etobicoke, North York, Scarborough and Old Toronto — and the GTA: Mississauga, Brampton, Vaughan, Markham, Richmond Hill, Oakville, Burlington, Milton, plus Barrie and Orillia.
Is the inspection really free?
Yes. We visit your home, find where water is getting in and explain your options. There is no charge and no obligation.
Book Your Free Basement Inspection
Tell us what is happening in your basement. We will call you back, book a visit and give you a written quote with a clear scope, price and warranty.
- Free, no-obligation inspection
- Written quote and contract
- Licensed, insured, our own crew
Office: 58 Six Point Rd, Etobicoke, ON M8Z 2X2
Email: info@leaquida.ca
Hours: Mon – Fri: 7:00 AM – 4:00 PM
