How much does exterior foundation waterproofing cost per foot in Ottawa?

Published Ontario contractor pricing puts exterior foundation waterproofing at roughly $100 to $350 per linear foot of wall, commonly $150 to $250. Deeper foundations and tight site access push costs toward the higher end of that range.

What moves a quote up or down comes down to a handful of job-specific factors: how long the wall is, how deep the footing sits, how much room the excavator has to work alongside the house, whether the existing drain tile is being replaced and where it will discharge, and how much finishing work is inside the basement once the wall is exposed.

What a fair quote should spell out

Ask each contractor to put the following in writing before you compare numbers:

• which walls are included and their measured length
• whether the work is dampproofing or waterproofing, and why they are recommending one over the other for your foundation
• whether the drain tile is being replaced, what size pipe, what stone cover, and where it drains
• what surface preparation is included for the wall (parging on a block wall, sealing holes on poured concrete)
• who requests the locate with Ontario Dig Authority before any digging starts, since the Act requires a locate request and Ontario Dig Authority asks for it at least 5 business days before excavation begins
• who pulls any required permit

Get at least three written quotes so the scope items, not just the per-foot rate, can be compared side by side. If one quote is significantly lower, ask what it leaves out rather than assuming it is the better deal.

The single most useful question to put to each contractor before signing: ask them to point to the line in the quote that covers drain tile, and explain whether they are replacing it or leaving it in place.

If you want local Ottawa contractors to see your project details, the request form on this page sends your information to waterproofing contractors listed in the Ottawa Construction Network directory.