Drainage Service in Greater Toronto Area
Drainage work covers everything that moves water away from a house before it becomes a problem inside the house. That includes grading the soil around the foundation, installing or repairing weeping tile (the perforated pipe that sits at footing level and channels groundwater to a sump pump or storm sewer), fixing downspouts and eavestrough discharge, waterproofing foundation walls, and dealing with window well drains, catch basins, and sump pump systems. In the GTA, a lot of this demand comes from older homes in areas like East York, Etobicoke, and Scarborough where clay soil, aging weeping tile, and heavier spring rain events put pressure on foundations that were built decades ago.
Because so much of this work happens underground, it's easy for a homeowner to get a quote that skips steps you can't see once the trench is backfilled. When you're comparing contractors, look for a clear explanation of what's actually failing (surface grading vs. weeping tile vs. a cracked foundation), a written scope that names the materials and depth of excavation, and a company that pulls permits when the work requires them, since exterior weeping tile replacement often does.
Our ranked guide to drainage contractors scores all 95 businesses in this category on the same set of criteria, so you can see how companies stack up on things like responsiveness, workmanship, and how they handle warranty callbacks. The full breakdown of how we score is on the methodology page.
Get matched with drainage service
No cost, no obligation. Tell us about your project and we'll connect you with contractors who fit your needs.
All drainage service, ranked by score and relevance
We found 191 businesses offering drainage service; 11 met the criteria for the scored directory. The order weighs each business's overall score by how much of its reviewed work is drainage service, so a lower-scored specialist can rank above a higher-scored generalist. Filter and sort below, or open the full map view.
Enquiries from our contact forms may go to partner providers who can do the work, and we may receive a referral fee. Our rankings are based on our published scoring method only and are never affected by referral fees.
Common questions about drainage service
- How much does drainage work cost in the GTA?
- Simple fixes like extending downspouts or regrading soil near the foundation can run a few hundred dollars. Interior weeping tile installation with a new sump pump typically lands in the low thousands per side of the house, while full exterior excavation and weeping tile replacement around an entire foundation is a much bigger job, often reaching into the five figures once excavation, waterproofing membrane, and landscaping restoration are included.
- How often does weeping tile need to be replaced?
- Original weeping tile in homes built before the 1980s was often unprotected clay or corrugated pipe with no filter sock, and it can clog or collapse after 30 to 50 years. If your basement has recurring dampness or you're seeing water after heavy rain rather than snowmelt, it's worth having a contractor scope the drain with a camera before assuming full replacement is needed.
- What should I expect during a drainage assessment?
- A proper assessment includes checking grading slope away from the house, inspecting downspout discharge points, looking at the sump pit and pump condition, and often a camera inspection of the weeping tile if interior water is a problem. Be cautious of anyone who quotes a full exterior dig-out without first ruling out simpler causes like a disconnected downspout or a clogged eavestrough.
- How can I tell if a drainage contractor did quality work?
- Ask what warranty they offer on both labour and materials, whether they use a filter sock on new weeping tile to prevent silt clogging, and whether they test the sump pump under load before finishing the job. A contractor who documents the work with photos before backfilling is giving you something to point to later if problems come up.
Guides to choosing drainage service
- Getting your basement ready before a GTA winter
A seasonal checklist for basement drainage and waterproofing before freeze-thaw cycles and spring melt put GTA foundations to the test.