Drain 1 Plumbers Inc.
“Throughout the whole experience, everyone was professional and friendly, and patiently walked me through the work that would be done, answering all my questions.”
Best Basement Waterproofing Contractors in North York, ON
24 contractors listed · 11 in North York · 8 open 24/7 · 18 open weekends · 21 rated 4.5+
Data verified October 21, 2026
City Wide Group
“The crew that was sent to perform the foundation leak repairs on my home were nothing but great.”
Dryshield
“He was kind enough to fix additional two issues without increasing the price.”
Nusite Contractors Ltd.
“What set them apart was their commitment to transparency, explaining each option's pros and cons, including the choice between internal and external waterproofing including what to expect in terms of timeline and expenses.”
Stay Dry Waterproofing
“Stefano was detailed and thorough in his explanations and quick to respond to inquiries via email or text/phone even after he left after giving the quote.”
NTL Contracting and Waterproofing Inc.
“They explained everything they did and cleaned up when they were done !”
The 24 contractors listed for North York, ON work on wet basements, foundations and crawl spaces. Warranty claims, free inspection offers and hours come from each company's own website. Ask each one how the proposed repair holds up through frost, because that is where local systems fail.
Area overview: North York, ON
11 of the 24 contractors we list are based in North York; the other 13 serve North York from towns including East York, Mississauga and York. 21 of the contractors on this page have a rating, from 4.5 to 5.0 across 1,850 reviews; 10 have 50 or more reviews. When customers rate these contractors on specific qualities, they most often praise professionalism (89%), quality (81%) and punctuality (72%). The topics that come up most in reviews of the contractors on this page are "estimates", "price" and "cleanliness". 8 are open around the clock; 16 are open on Saturdays and 14 on Sundays. The services the contractors on this page list most often on their websites are waterproofing (3), basement waterproofing (2), camera inspections (2), foundation repair (2) and underpinning (2). 7 show a licence on their websites and 2 list staff certifications (IICRC). 8 have ten or more years of experience, the longest 63 years. 8 offer emergency call-outs; 16 give free estimates; 4 are family- or locally-owned and 5 list coupons or special offers. We count these figures across the contractors on this page; hours and prices change, so confirm the details with the contractor before you book.
How many opinions should I get for a damp problem?
There are 24 listings for North York. Get more than one assessment before committing, because diagnoses here differ more than prices do, and one crew's interior system is another crew's regrading and downspout job. Compare what each one says is causing the water rather than the number at the bottom.
Canadian Home Comfort
“Assad and his team were able to fix our clogged pipes problems after different plumbers tried to fix the problem of not having a functional washroom.”
Flood Tech
“Had a flooded basement hired Flood Tech for basement water proofing , at the end of the day worked put perfectly!”
Brians Masonry
“His crew came by and did an excellent job not only replacing the brick but waterproofing in order to prevent damage in the future.”
Silvano Construction
Sure Seal Crack Injection
“Amazing friendly staff at the office and the guys out on the field are great also very professional I recommend this company for all types of different jobs from underpinning to waterproofing to crack injections top notch work”
Northern Contracting
“They repaired the walkway by our house and completely poured the new sidewalk.”
Eco Barriers
Journeymen Restoration and Masonry
“The journeymen team helped us with the excavation, underpinning, foundation, and waterproofing work for our home addition and we've had a great experience all around!”
Mud Monkeys Waterproofing
“Darby and his team are honest, efficient, hardworking and knowledgeable.”
FD Waterproofing FM Leaky Basement
Stone Mason Toronto
Homegrove Waterproofing
Drain Experts Plumbing
“He was on time and very thorough with his work and explained things in detail to us.”
Aquamen Waterproofing & Underpinning
“The timeline was set for a week, but they finished waterproofing my basement in 2 days of non-stop working.”
Prime Waterproofing
“I had leak in my basement and Nick showed up in a short time and fix the problem leaving my place spotless and cleaned.”
Rooter-Man
“The crew turned up on time and were very professional, leaving the front yard so you could barely tell any work had been done.”
Rooterworx
“Perhaps most importantly, Oleg was able to spot an issue that the previous companies missed which helped save us money and inform as to the work that needed to be done.”
Drainworks Plumbing
“We've had DrainWorks Plumbing come in three times now, once to replace our toilet, another to unclog our kitchen sink, and today to replace our faucet and plumbing.”
Why these companies made our list
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