Last Updated: February 25, 2026 — Reviewed by Brian Hayes, Licensed Master Plumber
Basement floods can be devastating, which is why preventing basement floods is key. When floods occur in basements they can cause loss of valuables, keepsakes and moisture-induced problems in your home—we know, as flooded basement plumbers in Oshawa, Bowmanville, Pickering and Ajax we’ve seen the trail of carnage they leave in their wakes.
To prevent any damage caused by basement flooding, follow these 4 relatively-simple tips for preventing basement flooding:
1. Check your Gutters and Downspouts
Gutters and downspouts are your first line of defence as they funnel water away from the house—and most importantly away from your basement. Ensure that before any major rainfall your gutters and downspouts are clear of debris, leaves, dirt and any other gutter-clogging material. If you have had problems with basement flooding before or are expecting a large storm then you may want to consider extending your downspouts further away from your home and aimed toward drainage in the street.
2. Keep Street Storm Drains Clear
As part of your anti-flooding strategy you will want to ensure that the storm drain(s) in front of your house aren’t clogged. If they do become clogged water pools will be created and downspout water will drain into your home. In fall, rake all the leaves in your yard and in the street’s gutter as they can quickly cover drainage and cause flooding.
3. Grade your Home’s Perimeter
One of the best ways to avoid having water around the outside of your basement (the primary cause of flooding) is to drain the water away naturally with ground grading. By raising the grade of the earth around your house to be higher than the rest of your yard and the street it will cause positive drainage away from your foundations. In high precipitation areas an extra 2 or 3 inches will usually work in preventing basement floods.
4. Check your Sump Pump
While sump pumps alone aren’t always enough to avoid basement flooding they do give you a head start, so check to ensure they are in working order. To do this simply open the cover and pull up on the float, if it is working you will hear the pump begin to work. While you are checking the pump’s working condition, be sure that the discharge pipe extends far enough of your house to not drain the water back into your basement. If the pump isn’t working have a professional come over and examine the problem.
If you experience regular basement flooding, want help preventing basement floods—or have a flooded basement right now—give us a call, your flooded basement plumber in Oshawa, Bowmanville, Pickering and Ajax.
Additional Resources
Frequently Asked Questions
When should I call a plumber for basement flooding?
You should call a licensed plumber for basement flooding when the issue persists after basic troubleshooting, involves water pressure changes, or requires access to pipes behind walls. Hayes Plumbing serves Oshawa, Ajax, Whitby, Clarington, and Pickering.
How much does basement flooding cost in Durham Region?
The cost of basement flooding in Durham Region depends on the complexity of the job and parts required. Hayes Plumbing provides upfront pricing before beginning any work so there are no surprises.
Should I try DIY or hire a professional for basement flooding?
While minor issues can sometimes be addressed with DIY methods, basement flooding often requires a licensed plumber to ensure the work meets Ontario plumbing code. Hayes Plumbing is fully licensed, WSIB certified, and BBB accredited.
Need help with plumbing repairs or installations? Hayes Plumbing & Bathroom Renovations serves Oshawa, Ajax, Whitby, Clarington, and Pickering. Contact us or call (905) 576-3043 for a free estimate.
