Ottawa's mix of heavy clay soil, a high water table in parts of the city, and brutal freeze-thaw cycles means foundation cracks, bowing walls, and wet basements are a fact of life for a lot of homeowners here. This list was put together from company websites, Better Business Bureau profiles, Google Business listings, and customer reviews on HomeStars, Houzz, Yelp, and Birdeye. Ten businesses currently operating in the Ottawa area made the cut.
1. The Foundation Experts Inc.
Area: Ottawa and surrounding region · Specialty: foundation repair and basement waterproofing · Rating: 5.0 on Google (70 reviews via Birdeye) · Since: 1995
The Foundation Experts has been fixing cracks, bowed walls, and wet basements in Ottawa since 1995 and carries an A+ Better Business Bureau rating. Reviewers consistently mention clear communication throughout a job and follow-through after the work is done, with one customer calling it one of the best contractors they've worked with. They suit homeowners who want a long-established, BBB-accredited name behind a warranty.
2. EC Foundations
Area: Ottawa (based in Nepean) · Specialty: residential foundation repair · Rating: A+ BBB accredited (since 2003)
EC Foundations has completed more than 5,000 residential foundation projects over 30-plus years and uses its own trained crews rather than subcontractors. Customers describe the company as professional, diligent, and careful, and the company structures payment around job completion and customer satisfaction rather than deposits upfront. A solid pick for larger structural jobs where a long project history matters.
3. Renco Home Improvements
Area: Ottawa · Specialty: foundation crack repair and basement waterproofing · Rating: 4.9 on Google (49 reviews) · Since: 2000s, 20-plus years in business
Renco combines foundation and waterproofing work with broader basement and bathroom renovation services, which makes it a practical choice for homeowners planning to finish or rebuild a basement after a repair. Reviewers frequently name owner Terry and praise quick response times and fair, transparent pricing. The company is BBB accredited with an A+ rating.
4. Wet Basement Solutions
Area: Ottawa, the Valley, and Eastern Ontario · Specialty: interior waterproofing and crawl space encapsulation · Since: over 30 years in business
Wet Basement Solutions focuses specifically on wet basements: interior drainage systems, crawl space encapsulation, sump pumps, and egress windows, backed by a lifetime warranty on its work. Customers highlight fast replies, availability after hours, and thorough cleanup once a job wraps. Good fit for homeowners whose main problem is water intrusion rather than structural cracking.
5. Pro-Core Foundations
Area: Ottawa · Specialty: basement waterproofing, weeping tile replacement, and crack repair
Pro-Core handles both structural foundation repair and full basement waterproofing, including weeping tile replacement and sump pump installation. Customers cite crew lead Corey by name repeatedly, describing the team as knowledgeable, clean, and efficient on timeline. Worth a call for homeowners dealing with an older home whose weeping tile has failed.
6. Ottawa Structural Residential Services Ltd.
Area: Ottawa · Specialty: foundations and waterproofing · Rating: 89% on HomeStars (26 reviews)
Ottawa Structural shows up on HomeStars specifically under the foundations and waterproofing category with a strong review score from a real customer base. Because the company's own site wasn't verifiable in this search, its HomeStars profile is linked here instead. A reasonable option to compare against the bigger, more heavily marketed firms on this list.
7. Braden Foundation Construction
Area: Ottawa (based on Carleton Avenue) · Specialty: leaky basement repair and new concrete foundations · Since: over 20 years
Braden handles everything from crack injection to full new concrete foundation construction, which sets it apart from firms that only do repair work. Reviewers name technicians Al and Ryan specifically, praising thorough explanations of the problem and options before work starts, and several mention competitive pricing versus quotes from other companies. The company carries an A+ BBB rating.
8. Atlantic Basement Systems
Area: Ottawa, Brockville, Hawkesbury, and Eastern Ontario · Specialty: basement waterproofing, french drains, and sump pumps · Rating: 4.9 on Google · Since: 1993
As a Basement Systems dealer serving Greater Ottawa since 1993, Atlantic Basement Systems holds an A+ BBB rating and a long public review history dating back over a decade on its own site. Customers describe crews who explain the process in detail, finish on budget, and clean up daily. A solid choice for homeowners who want a nationally backed system with a long local track record.
9. Above Water Inc.
Area: Ottawa (based on Coventry Road) · Specialty: structural waterproofing and concrete repair · Rating: A+ BBB · Since: over 19 years
Above Water is a family-owned waterproofing and concrete repair business offering a 20-year transferable warranty on foundation work, which is longer than most competitors on this list. It's licensed and insured and carries an A+ BBB profile, though the company is not BBB accredited. Consider it for a warranty-focused waterproofing job on a home you plan to sell down the line.
10. Mr. Foundation Inc.
Area: Ottawa · Specialty: basement waterproofing and structural repair · Rating: 5.0 on Houzz · Since: 1992
Mr. Foundation is one of the longest-running names on this list, family owned and operating in Ottawa since 1992 across waterproofing, crack repair, and full foundation replacement. Feedback across review platforms is mixed rather than uniformly positive, so it's worth reading a few recent reviews directly before booking, but the company's decades of local history and BBB standing kept it on this list.
How We Built This List
This list was compiled from public web sources, including company websites, Better Business Bureau profiles, and customer reviews on Google, HomeStars, Houzz, Yelp, and Birdeye, reviewed in August 2026. Ottown did not test, inspect, or personally verify any of this work. This is not a paid placement and no business on this list has any affiliation with ottown or its operator. If you've had a recent experience with a foundation repair company in Ottawa, good or bad, that's worth factoring in alongside what's listed here, since conditions and crews can change year to year.
Sources: The Foundation Experts, EC Foundations, Renco Home Improvements, Wet Basement Solutions, Pro-Core Foundations, Braden Foundation Construction, Atlantic Basement Systems, Above Water Inc., Mr. Foundation, and Better Business Bureau and HomeStars listings for each company.
