Toronto's clay soil, aging sewer infrastructure, and heavy spring rains make drainage work one of the more common repairs homeowners in this city run into. That covers everything from grading a yard so water moves away from the foundation, to installing weeping tile, sump pumps, French drains, and backwater valves, to clearing or replacing damaged sewer laterals that connect a house to the city main. We've listed 68 businesses in Toronto offering these services, ranging from small crews focused on foundation waterproofing to larger outfits that also handle municipal permit work and sewer camera inspections.
Before hiring, ask a contractor to explain what's actually causing the water problem, not just what they plan to install. A basement leaking after rain often points to poor grading or clogged weeping tile, while backups coming up through floor drains usually mean a sewer line issue or a missing backwater valve. A good contractor will run a camera inspection before quoting major excavation work, pull the required city permits for anything touching the sewer lateral, and give a written scope that separates labor, materials, and any restoration (concrete, landscaping) needed after the dig. Be wary of anyone quoting a fix over the phone without seeing the property.
Our ranked guide to Toronto drainage services scores companies on factors like verified licensing, response time, warranty terms, and how consistently past customers report the work matching the original quote. See our methodology for the full breakdown of how we weigh each factor.
