Exterior Waterproofing
Full-perimeter excavation and multi-stage membrane application that stops water before it ever reaches your foundation walls.
$70 – $125 per linear foot
Read More →Waterproofing & Drain Services — Greater Toronto Area
Waterproofing & Drain Services Toronto
Industrial-grade basement waterproofing and drain services with a lifetime warranty. Serving the entire Greater Toronto Area with 24/7 emergency service.
- Lifetime Warranty
- Licensed & Insured
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HomeStars
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TrustedPros
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Fill out the form to get started with your basement waterproofing.
What we do
Waterproofing & Drain Services
Complete protection from water — basement waterproofing and foundation repair on one side, drains, sump pumps and backwater valves on the other. One contractor for everything under your home.
Waterproofing
Interior Waterproofing
Interior drainage channels and sump systems that capture water at the footing and move it safely out of your home — no excavation outside required.
$120 – $300 per linear foot
Read More →Foundation Repair
Crack injection, structural repair and reinforcement that restore the integrity of poured concrete and block foundations.
Free on-site estimate
Read More →Basement Underpinning
Engineered underpinning that strengthens your foundation while lowering the basement floor — adding safe, legal living space.
$15,000 – $60,000 typical project
Read More →Basement Lowering
Gain full ceiling height with underpinning or bench-footing methods — engineered, permitted and waterproofed end to end.
Free on-site estimate
Read More →Basement Leak Repair
Targeted repair of active leaks — crack injection, window leaks, floor leaks and cold joints, most fixed in a single visit.
From $50 per sq. ft.
Read More →Concrete Floor Installation
New basement slabs poured level and sealed — the finishing step of every lowering and waterproofing project.
Free on-site estimate
Read More →Egress Windows
Code-compliant basement egress windows that bring in light, ventilation and a legal escape route for basement bedrooms.
Free on-site estimate
Read More →Window Well Installation
Replacement and new window wells with proper drainage — fixing one of the most common causes of basement leaks.
Free on-site estimate
Read More →Drain
Backwater Valve Installation
A backwater valve stops municipal sewage from backing up into your basement during storms — and Toronto rebates can cover much of the cost.
City rebates available
Read More →Backflow Prevention
Protect fixtures, floor drains and your main line from reverse flow with code-compliant backflow prevention devices.
Free on-site estimate
Read More →French Drain
Perforated drainage systems that intercept groundwater and surface runoff, redirecting it away from your foundation.
Free on-site estimate
Read More →Drain Cleaning & Repair
Camera inspection, snaking and repair of clogged, collapsed or root-invaded drains — before they flood your basement.
Camera inspection included
Read More →Sump Pump Installation
Sealed sump pits and high-capacity pumps that automatically eject groundwater — the heart of any interior waterproofing system.
Free on-site estimate
Read More →Battery Backup Pump
Storms knock out power exactly when your sump pump is needed most. A battery backup keeps pumping through any outage.
Free on-site estimate
Read More →Why Drainjet
Award-Winning Waterproofing & Drain Company
Drainjet specializes in industrial-grade basement waterproofing, underpinning and drain services across Toronto. From wet basements and foundation cracks to blocked drains, sump pumps and sewer backup protection — if water is the problem, we fix it for good.
- Lifetime transferable warranty on waterproofing
- Licensed, insured and WSIB-covered crews
- Engineered drawings and city permits handled for you
- Help with Toronto Basement Flooding Protection rebates
- 24/7 emergency response across the GTA
25+
Years of Experience
5,000+
Basements Waterproofed
24/7
Emergency Service
100%
Lifetime Warranty
Transparent pricing
Cost of Waterproofing & Drain Services
Cost depends on the solution and the total area treated. Interior waterproofing starts at $50 per square foot, exterior waterproofing at $120 per square foot. Drain services — from camera inspections to backwater valves and sump pumps — are quoted per job, and many qualify for City of Toronto rebates.
Our process
How It Works
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1
Free Inspection
We inspect your basement, trace the water source and explain your options — interior, exterior or targeted repair.
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2
Written Quote
A detailed, fixed-price quote with no hidden extras. We outline timelines, permits and available city rebates.
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3
Waterproofing Work
Our in-house crews complete the job on schedule — excavation, membranes, drainage, pumps — and leave the site clean.
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4
Lifetime Warranty
Every waterproofing project is backed by a transferable lifetime warranty. Your basement stays dry — permanently.
Reviews
What Homeowners Say
★★★★★“Drainjet waterproofed our entire foundation after two springs of leaks. The crew was fast, clean, and the basement has been bone dry since. Best money we've spent on the house.”
★★★★★“They installed a backwater valve and sump pump and handled the city rebate paperwork for us. Professional from the first call to the final inspection.”
★★★★★“Underpinning sounded scary but Drainjet managed the engineering, permits and excavation flawlessly. We gained a full-height basement apartment.”
FAQ
Basement Waterproofing Questions
Interior vs exterior waterproofing — which do I need?
Exterior waterproofing stops water at the foundation wall and is the most complete solution. Interior waterproofing manages water that enters and is ideal when excavation isn't practical. We recommend the right method after a free inspection.
Do you handle drain and sewer problems too?
Yes — Drainjet is a full waterproofing and drain company. We do drain cleaning and camera inspections, French drains, backwater valves, sump pumps and battery backups, so the same crew that waterproofs your basement can fix the drainage causing it.
How much does basement waterproofing cost in Toronto?
Interior waterproofing starts around $50 per square foot; exterior waterproofing around $120 per square foot. Exterior work typically runs $70–$125 per linear foot depending on depth and damage. Every quote is free and fixed-price.
Are there rebates for waterproofing in Toronto?
Yes — the City of Toronto's Basement Flooding Protection Subsidy Program offers rebates for backwater valves, sump pumps and foundation drain disconnection. We help with the paperwork.
How long does a waterproofing project take?
Most interior systems take 2–4 days; full exterior waterproofing of one wall takes 3–5 days. Underpinning projects run several weeks depending on scope.
Is your warranty really lifetime?
Yes. All waterproofing services carry a lifetime warranty that transfers to the next homeowner — it's a selling point if you ever move.
Wet basement? Let's fix it permanently.
Call now for 24/7 emergency service or request your free on-site inspection.