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24 contractors listed · 13 in Ottawa · 4 open 24/7 · 12 open weekends · 22 rated 4.5+
Data verified October 18, 2026
The 24 contractors listed for Ottawa, 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.
13 of the 24 contractors we list are based in Ottawa; the other 11 serve Ottawa from towns including Gatineau, QC (7 km), Gloucester (10 km) and Nepean (11 km). The contractors on this page are rated from 4.2 to 5.0 across 1,265 reviews; 9 have 50 or more reviews and 22 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise professionalism (94%), responsiveness (82%) and quality (80%). The topics that come up most in reviews of the contractors on this page are "price", "communication" and "estimates". 4 are open around the clock; 12 are open on Saturdays and 10 on Sundays. The services the contractors on this page list most often on their websites are basement waterproofing (4), foundation crack repair (4), foundation waterproofing (3), foundation inspections (2) and foundation repair (2). 5 show a licence on their websites. 13 have ten or more years of experience, the longest 27 years. 4 offer emergency call-outs; 1 offers financing or payment plans; 17 give free estimates and 7 are family- or locally-owned. 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.
There are 24 listings for Ottawa. 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.
