Basement waterproofing in Markham, plus rebate help of up to $5,000 per measure. Our waterproofing company installs qualifying backwater valves, sump pumps and lateral relines before the 2027 deadline. Free inspection, 25-year warranty.
They were affordable and efficient and overall did just a great job on our backwater valve! They even submitted the rebate forms for us.
We were extremely pleased with the work we received with DrainCom. Vlad in particular was excellent. We had tree roots growing through the pipes in front of our house and had the pipes dug up and replaced. We reached out to several plumbers. Vlad provided the most detailed assessment by far before providing us with a quote. Other companies told us we would have to take down our porch before completing the work but Vlad realized that this was not actually necessary, saving us a huge amount of time and money. The quote was very reasonable and less than other companies. The work was done on time and with no surprises. I would strongly suggesting using draincom for plumbing work.
DrainCom team turned what started out as a stressful and challenging situation (drain collapse) into a positive experience. There commitment to professionalism, state-of-the-art techniques, and exceptional customer service makes DrainCom the go-to company for drain and sewer cleaning needs. I wholeheartedly recommend DrainCom to anyone seeking reliable and top-notch services.
Friendly and professional service. 2nd time I have used DrainCom over the last two years and both times I have been very impressed with their speed (issue fixed on the spot when they arrived at my house) and cost competitiveness. Highly recommend Val and team - plus Val didn't mind that my dog barked at him while he worked!
We had a small flood in our basement, and contacted DrainCom to come in and provide an assessment and quote for the work. Our experience with DrainCom was highly positive, from the initial call to the finished product. They arrived quickly to identify the issue (roots blocking our pipe) and provide an outline of the work to be done (digging down to replace the pipe and installing a backwater valve). Communication was excellent, especially with their office - they kept us informed throughout the project about what would happen and when, and answered all our questions. We thought we might lose a tall cedar during the digging, but they were able to work around it. The workers were determined to finish the work in one (long) day, as it was going to rain the next day. They had to remove a door and appliances during the project, but returned the next day to put it all back in place. We would definitely recommend DrainCom to anyone with plumbing needs!
95 of our 100 Google reviews are five stars. See what homeowners across the GTA say about our crews.
See All 100 ReviewsDeadlines: permits must be issued by April 30, 2027, and applications are due by July 31, 2027. The rebate is for properties at flood risk, so we check eligibility during your inspection. Book early; permit queues fill up near deadlines.
If water has ever come up your floor drain, a backwater valve is your first fix. We camera the lateral, install the valve indoors or outdoors with a permit, and file for the rebate.
In some older Markham homes, foundation drains feed the sanitary sewer. During a storm, that groundwater has nowhere to go but back into your basement. We disconnect the weeping tile and send it to a new sump pump. That combination qualifies for the largest rebate, up to $5,000.
Roots from mature trees in Unionville and Markham Village crack old sewer pipes. We reline them trenchless, without digging up your front yard, and the rebate covers up to $2,500.
Main Street Unionville and Markham Village have heritage homes on stone and rubble. We repoint, parge and install interior drainage that keeps the floor dry without stressing the old wall.
Subdivisions from the 1970s to today develop settlement cracks, tie rod leaks and water at the floor-wall joint. We inject cracks and add drainage where pressure builds.
We upgrade pumps, add battery backup and alarms, and rebuild flooded window wells with proper drains.
Our waterproofing company serves every Markham neighbourhood with interior basement waterproofing, exterior basement waterproofing, sewer relining and rebate-ready installs. Searching for basement waterproofing near me in Unionville, Cornell or Thornhill? We come to you.
Not sure which one you need? It comes down to how water enters, your foundation type and access around the house.
With interior waterproofing, also known as internal basement waterproofing, nothing outside gets disturbed. We cut a trench around the inside perimeter, set new weeping tile, add a drainage membrane on the walls and send the water to a sump pit. It’s the gentle option for heritage stone foundations on Main Street Unionville and in Markham Village. Expect $100 to $240 per linear foot.
Exterior waterproofing stops water at the source. We expose the foundation to the footing, repair cracks and mortar joints, apply a waterproof membrane, install new weeping tile, then backfill and restore the landscaping. It suits 1970s to 90s homes in Milliken, Thornhill and Buttonville with cracked walls. Expect $150 to $400 per linear foot.
From your first call to the warranty in your hand. Clear steps, a written price and no surprises along the way.
We check eligibility, camera the lateral and find the leak.
With your rebate amount beside each item.
City of Markham permit, issued well before April 30, 2027.
Most jobs take 1 to 3 days.
Water test and final camera check.
Everything you need to apply by July 31, 2027.
With Markham’s rebate, an indoor backwater valve priced at $2,500 can cost you as little as $750. Your free inspection gives you both numbers.
On August 19, 2005, a severe storm flooded West Thornhill. It led to Markham’s 30-year Flood Control Program, launched in 2013 at roughly $367 to $382 million. Phase 4B finished in June 2024, and downspout disconnection wrapped up in Thornhill, Unionville and Markham Village in December 2022.
The Rouge River, the Don River and German Mills Creek run through Markham, raising groundwater in nearby neighbourhoods.
Stone foundations in Unionville and Markham Village sit a few kilometres from 2010s builds in Cornell and Berczy. Each needs a different approach.
Markham took 69.9 mm on September 2, 2026.
What every job includes:
Over 20 years we’ve waterproofed more than 300,000 linear feet of foundation walls and installed about 700,000 feet of membrane and weeping tile. Our office is at 1307 Kamato Rd., Mississauga, ON L4W 2M2. Hours: Monday to Friday 8 a.m. to 9 p.m., Saturday and Sunday 9 a.m. to 2 p.m., with emergency response by phone for active flooding and sewer backups.
The rebate is for properties at flood risk. We check eligibility during your free inspection and confirm before you commit to anything.
Permits must be issued by April 30, 2027, and applications are due by July 31, 2027.
It depends on your plumbing layout and finished space. Indoor valves qualify for up to $1,750 and outdoor valves for up to $2,000. We’ll recommend the right one.
Yes. Reline or repair of the private lateral qualifies for up to $2,500.
Yes. We repoint, parge and use interior drainage so the old wall isn’t disturbed.
We book visits across Markham quickly, and active leaks or backups get priority.
Many valve and disconnection jobs drop by half or more. Your quote shows the price and the rebate side by side.
Yes. Our 25-year warranty moves with the house.
Unionville to Cornell and beyond. Here are the other cities where we fix wet basements.
Don't see your town? Call 905-238-6800 and ask. We likely cover it.
Beat the 2027 deadline and protect your basement. Call 905-238-6800 or book online.
905-238-6800