Safestep Building Treatments Inc
“We recently had a sub-pump installed by Safe Step and right from the first call to Nick and Jeff coming to install they were professional, polite, on time and no surprises.”
Best Basement Waterproofing Contractors in Kingston, ON
15 contractors listed · 7 in Kingston · 4 open weekends · 10 rated 4.5+
Data verified October 16, 2026
Loyalist Construction & Landscaping Ltd.
“Their attention to details, accommodations for my family during a hectic time and the neat and systematic approach to a very large job was appreciated.”
Wilcore Concrete Drilling & Cutting Ltd
“When we needed cement around a frame in the foundation increased in size!”
Santos Brothers Construction
“Did the job (including pinning and pouring the foundation, and pouring the basement slab and porch) with expert-level skill and were a pleasure to have on site.”
Robert J Lappan Excavating
“Fantastic place to work, a great environment and responsible and respectful crew.”
TH Stone Solutions
“The work was booked in December for a spring start and was slightly delayed due to weather (out of their control) and I was kept up-to-date.”
The 15 contractors listed for Kingston, 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: Kingston, ON
7 of the 15 contractors we list are based in Kingston; the other 8 serve Kingston from towns including Belleville (64 km), Amherstview (6 km) and Yarker (27 km). 14 of the contractors on this page have a rating, from 3.6 to 5.0 across 216 reviews; 1 has 50 or more reviews and 10 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise professionalism (93%), quality (83%) and responsiveness (75%). The topics that come up most in reviews of the contractors on this page are "estimates", "price" and "communication". 4 are open on Saturdays and 1 on Sundays. Domain records put 3 websites of the contractors on this page at ten or more years old; the oldest dates from 2000. 7 give free estimates. We have a website on file for 14 of the contractors on this page; 14 publish a contact page and 13 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 15 listings for Kingston. 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 Sealants
Limestone City Concrete Ltd
“They built my step last summer and installed handrails that turned out awesome.”
Rob's Excavation & Property Maintenance
“Rob and his crew did a great job on grading and paving the drive.”
Belleville Custom Concrete
“I was very impressed with the workmanship and the responsiveness of the people from Belleville Custom Concrete.”
Stampkrete Concrete Contracting
“Casey and his crew did the finishing of the floor of my house, and did a front patio.”
Aquafix Basement Waterproofing
“Matt (owner) showed up promptly for our consultation wearing a face mask for COVID protocols and he not only walked me through everything we needed, but he educated me on how water gets into a home and different ways it can affect the house.”
Atlantic Basement Systems
“Due to acute brain fog I mistakenly accused Atlantic Basement Systems, in a previous review, of being bogus when in fact they are a solid business - their service to attend to a sump pump was excellent.”
Bottoms Up Construction Ltd
“Bottoms Up did a full kitchen renovation for us and they created our dream kitchen.”
Duratec Building Systems
Why these companies made our list
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