Liftec Slabjacking Inc
“They were all very friendly, careful of their surroundings, and cleaned up perfectly after.”
Best Basement Waterproofing Contractors near Alliston, ON
1 of these contractors is based in Alliston; the others serve Alliston from towns including Barrie (29 km), Lisle (12 km) and Schomberg (22 km).
2 open 24/7 · 6 open weekends · 8 rated 4.5+ · 2 show a licence
Data verified October 18, 2026
Pro-Leak Solutions
“When Jody and his son William arrived, they found not one but three unsealed tie rods on basement wall.”
Drycrete Contracting
“Went from having 2 of the loudest sump pumps to only needing 1 that's so quite you could sleep beside it!”
CCL Landscape Design Ltd.
“The owner of CCL Landscaping walked me through every aspect of his quote and was very knowledgeable when it came to the choice of stone and vegetation I should use.”
Tor Contracting Inc.
“Marco was a fantastic through it all, especially considering we had contacted for a quote a few years prior but we're unable to commit until this year due to finances.”
Fleming Heritage Restoration
“Chris and his team took the time to explain every step of my project to me, including the type of mortar they would use, the helix ties, tinting options to restore the yellow brick, and much more”
The 10 contractors listed for Alliston, 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: Alliston, ON
8 of the 10 contractors on this page have a rating, from 4.7 to 5.0 across 548 reviews; 2 have 50 or more reviews. The topics that come up most in reviews of the contractors on this page are "estimates" and "price". 2 are open around the clock and 6 are open on weekends. 2 show a licence on their websites. 3 have ten or more years of experience, the longest 20 years. 2 offer emergency call-outs; 6 give free estimates and 2 are family- or locally-owned. We have a website on file for all 10 of the contractors on this page; all 10 publish a contact page and 8 list a public email. We count these figures across the contractors on this page; distances are straight-line, and 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 10 listings for Alliston. 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.
Umbrella Waterproofing Plumbing and Drains
“I recently used a waterproofing service for my basement, and I'm extremely satisfied with the results.”
Concrete Bradford
DNR Group
JN Roofing and Contracting
“The entire process from Mike, Amy, to installation team was seamless.”
Why these companies made our list
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