Safestep Building Treatments Inc
“The crew were very professional, did fast careful work, and excellent clean up.”
Best Basement Waterproofing Contractors near South Frontenac, ON
None of these contractors is based in South Frontenac; they work from towns including Kingston (33 km), Stone Mills (32 km) and Smiths Falls (58 km).
10 contractors listed · 3 open weekends · 7 rated 4.5+
Data verified October 16, 2026
Loyalist Construction & Landscaping Ltd.
“They had a limited space to work in and managed to do the job with minimal disturbance to the garden shrubs and rose bushes”
Rob's Excavation & Property Maintenance
“Rob and his crew did a great job on grading and paving the drive.”
Wilcore Concrete Drilling & Cutting Ltd
Santos Brothers Construction
“Good communication, great product/service, and fair pricing.”
Robert J Lappan Excavating
“We were pleased with the customer service, quality of work, pricing and all in all a good job.”
The 10 contractors listed for South Frontenac, 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: South Frontenac, ON
9 of the 10 contractors on this page have a rating, from 3.6 to 5.0 across 208 reviews; 2 have 50 or more reviews and 7 are rated 4.5 or higher. 3 are open on Saturdays and 1 on Sundays. 4 have ten or more years of experience, the longest 30 years. 3 give free estimates. We have a website on file for all 10 of the contractors on this page; all 10 publish a contact page; all 10 list a public email and 1 takes bookings online. 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 South Frontenac. 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.
TH Stone Solutions
“The owner and chief mason Tom, is very approachable and clearly explains his intended work with a fair and accurate cost estimate in a timely fashion.”
Canadian Sealants
Bottoms Up Construction Ltd
“Their attention to detail and passion they have for their work is absolutely outstanding!”
Belleville Custom Concrete
“They just finished our stamped driveway and everyone who goes past our house comments on the look and quality of the work.”
Why these companies made our list
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