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Leaky Basement Repair in Toronto

Basement leaks in Toronto often originate from foundation cracks, failing joints, or aging drainage systems. Our basement leak repair services focus on identifying the exact source of water entry and applying targeted repairs to stop moisture issues at their root.

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Fast, Permanent Solutions for Basement Water Leaks

Even a small leak in your basement can lead to mold, structural damage, and costly repairs. At MT Drains & Plumbing, we specialize in identifying the source of the leak and delivering long-term waterproofing solutions. Whether it’s coming from a wall crack, window well, or floor joint, our team is equipped to stop the problem at its source—permanently.

Free onsite inspections. Licensed waterproofers. Emergency service available.
Our Waterproofing Services
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Water in Your Basement? We’ll Stop It — Fast.

Call (647) 370-5325

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How to Know You’re in the Right Place

If you’re seeing any of the following signs, you’re not alone—and we can help:
These are symptoms of a larger waterproofing issue. We’re here to fix it right.

Our Basement Leak Repair Services

We handle all types of leaks—surface-level, structural, and everything in between. Each project starts with a thorough inspection to identify the real source of the problem.

Foundation Crack Repair

High-pressure polyurethane injection or epoxy seals cracks and prevents future seepage. Ideal for active leaks or visible damage.

Cove Joint Seepage Repair

Leaks where the wall meets the floor are caused by hydrostatic pressure. We install interior drainage systems or exterior footer drains to relieve pressure and stop the leak.

Window Well Leak Solutions

If water enters through or around basement windows, we install window well drains, covers, and sealed window units to prevent future flooding.

Floor Crack or Slab Leaks

Rising groundwater can push through the slab. We use perimeter drainage and sump systems to redirect water before it reaches your floor.

Sump Pump System Repair or Replacement

We diagnose sump pump issues, replace aging units, and install backup systems to keep your basement protected during storms and power outages.

Book Your Free Basement Leak Inspection Today

Don’t wait for the next heavy rain to make the problem worse. Let our licensed team assess your basement and give you the right fix—fast.
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Why Basement Leaks Are Dangerous to Ignore

Leaky basements don’t fix themselves. Left untreated, a minor leak can lead to:
  • Rotting wood and weakened framing
  • Electrical damage
  • Mold and indoor air quality issues
  • Damage to stored belongings
  • Permanent structural shifts
And the longer you wait, the more expensive it gets.
crack repair in basement foundation project in Stouffville
interior drain tile covered with new cement

What Causes Basement Leaks in Toronto?

Toronto’s aging infrastructure, clay-heavy soil, and fluctuating water tables make basement leaks a common problem. The most frequent causes include:
  • Cracked or porous foundation walls
  • Poor drainage or grading around the home
  • Failing sump pumps
  • No vapor or moisture barriers
  • Hydrostatic pressure buildup below slab level
  • Clogged or non-existent window well drains
Every leak has a source. Our job is to find it and stop it at the root.

What to Expect With MT Drains & Plumbing

Free Onsite Inspection

We assess your home, identify the problem, and explain next steps in plain language.

Upfront Quote

You’ll get clear pricing with no surprises.

Licensed Technicians

No subcontractors. All work is performed by trained, insured staff.

Warranty Provided

Our leak repairs are backed by long-term protection.

Support With Rebates

For eligible projects, we help you claim Toronto’s flood prevention subsidies.

Trusted by Toronto Homeowners Since 1991

“We had a foundation wall crack leaking water after a rainstorm. Pavel and the team came the same day, identified the issue, and installed an interior drain system and sump pump backup. It’s been bone dry ever since. Clean work, fair price, and great service.” –

T.J, Toronto
Toronto Basement Underpinning

FAQ

How much does basement leak repair cost?

Repairs range from $1,200–$4,500 depending on the source, location, and severity. We offer free inspections to give you an accurate quote.

Do you offer emergency leak repair?

Yes. We offer 24/7 emergency response in Toronto and the GTA.

Can I patch a leak myself?

Temporary fixes like hydraulic cement may hold briefly, but won’t stop the root cause. Professional waterproofing provides long-term protection.

Do you offer warranties?

Yes, all waterproofing work is backed by written warranties. Ask during your inspection.

Can I get a rebate for this work?

Yes. Toronto’s Basement Flooding Protection Program offers up to $3,400 in subsidies for qualifying work like sump pump and backwater valve installation.

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Speak With a Licensed Professional
Have a question about your situation? Our team will review the details and explain the right next step.
Contact Us
Call (647) 370-5325

MT Drains & Plumbing Reviews

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MT Drains & Plumbers LTD4.8
Based on 212 reviews
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Valeria S.
Great experience with MT Drains & Plumbing in Barrie for our basement waterproofing project. Pavel was knowledgeable, straightforward, and easy to deal with, and the office team was responsive and organized throughout the process. Fair pricing, quality workmanship, and the job was completed professionally. Would definitely recommend MT Drains & Plumbing for basement waterproofing and drainage work.
VIACHESLAV O.
I would like to sincerely thank MT Drain Plumbing for the excellent work they did. The entire team was professional, punctual, courteous, and very respectful throughout the process. Everything was well organized and completed on time. I especially appreciated how carefully they protected the surrounding areas and contained everything to prevent dirt, debris, or other materials from getting where they shouldn’t. The work was completed quickly, efficiently, and to a very high standard. I was also pleasantly surprised by the price — it was significantly lower than the quotes I received from other companies, which made the experience even better. I would also like to mention that the team members who came out to assess and discuss the work with me were extremely polite, professional, and punctual. I highly recommend MT Drain Plumbing to anyone dealing with waterproofing issues, drainage problems, or water management around their home. If you’re looking for a company that provides quality work, fair pricing, and excellent customer service, I definitely recommend giving these guys a call. Thank you again to the entire MT Drain Plumbing team for a job very well done!
Brandon C.
We have now used MT Drains for the second time as they delivered great work for us. Pavel and his team are very helpful and responsive. They are quick to reply and do a site visit to diagnose the issue. They always provide options and scenarios to help you understand the issue and the solution. I would definitely recommend them for your waterproofing needs. Thanks again to the team!!
Simon S.
Update on August 24 2026: We needed to replace a shower cartridge and it turned out that we also needed to replace our main house water supply shut off valve before the shower job could be done. Olga in the office was very helpful in scheduling the job as well as in dealing with our municipality who needed to be involved as well. When Denis the technician arrived to do the job - early, which I always appreciate! - he assessed the job & dealt with the municipality further to expedite the job. It also turned out that the shower cartridge was badly corroded & required Denis' expert work & his experience to remove it without damaging the fixture. (This is a job the internet says you can do yourself, but when the cartridge is very old & corroded as this was, a professional is required!) He then easily installed the new cartridge. As usual, I was impressed by the professionalism and pleasantness of MT Drains' staff, both in the office & in the field. Update on Dec 17 2024: A toilet in our house came away from the floor in a way that broke the flange it was bolted to. I called MT Drains because they had done a fine repair job in our kitchen a few months earlier (see below). Viktoriya in the office was very friendly & helpful in getting us a cost estimate in a timely fashion and setting up an appointment to fix the problem that fit our schedules. We received email confirmation and reminder of the appointment, and a text confirmation on the morning of the appointment itself. The technician, Amir, arrived a few minutes before the start of the window for the appointment, which I always appreciate a lot! He was friendly, polite and professional. He assessed the repair requirements, confirmed the estimate, and completed the job in a timely manner. Amir also cleaned up everything and even took the garbage away with him. Viktoriya followed up shortly thereafter by phone to check that we were pleased with the job, and then sent the invoice to me for the agreed amount. She also confirmed that they received our payment right away. I’ve used MT Drains’ services for plumbing issues before and will happily use them again! The drain from our kitchen sink was leaking near the place where it attached to the sink itself. The reason turned out to be corrosion that was rotting away the place where the drain pipes attach to the sink. Pavel from MT Drains responded to my Trusted Pros posting within minutes, and was able to have a plumber come that very day. Dima arrived within the agreed time frame. He was polite, friendly, efficient and very skilled at diagnosing the problem and making the repair by replacing the corroded parts. He also cleaned up after his work. Viktoriya in the office was also very helpful and professional - the entire operation was fast, efficient, effective, friendly and professional. I will definitely call on MT Drains for any future plumbing needs.
Joel M.
I experienced a sudden pipe leak and needed help fast, so I contacted Plumber Rapid Rescue Markham. They were quick to respond and scheduled me the same day, which was a huge relief. The plumber showed up on time, explained what caused the issue, and fixed it efficiently without any pressure or upselling. If you’re looking for a dependable plumbing company in Markham, I’d definitely recommend giving them a call.
Connie J.
I had a leak in my bathroom that involved replacing old pipes and taps. I am very pleased with the timely and professional service.
Nolan A.
After noticing water coming through a wall during heavy rain, we contacted MT Drains for waterproofing. Pavel came by for the estimate and thoroughly explained our options. His crew was fantastic—respectful of our property and hardworking. They waterproofed the entire affected wall from the outside, and we've had zero issues since. We’re very impressed and grateful!
Paul A.
We are repeat customers of MT Drain Richmond Hill and could not be happier with their services. Our first experience with them involved basement waterproofing, and we have had no issues with it for the past six years, even during periods of heavy rainfall. In addition, they provided us with gorgeous window-well covers that have attracted inquiries from friends and neighbors. Beyond their excellent work, the team is punctual, budget-friendly, and extremely courteous. They also prioritize property protection and ensure that no damage is incurred. Communication is excellent, and they follow up promptly, demonstrating their professionalism.
Paul A.
For some time, our basement had been experiencing water leakage after rain showers. The issue persisted, and with every passing storm, the leaks became more severe, leaving me feeling anxious. After researching online for a reliable company, I discovered Mt Drains. I reached out to them and was pleasantly surprised by how promptly they responded and came to assess the situation. The technician who attended to us was not only personable but also provided us with the best solution to our problem. The workers who carried out the job were equally professional and friendly, and upon completion, the area looked better than it did before. I am highly satisfied with their services and will undoubtedly recommend them to anyone in need.
Mihail M.
Guys did an amazing job , fixing leak in the basement . Very professional job . Thanks again
Valeria S.recommends
We called MT Drains & Pluming after a leak in the basement after heavy rain. The team was courteous and very professional. We ended up hiring Pavel for external basement waterproofing. The job was done on time and the price was reasonable.
Anton P.
Great company to deal with. Had leaking basement, called them and they came next day. Started working in 2 days and finished all in 3!weeks. Highly recommend.