How Much Does Basement Waterproofing Cost in Ottawa? (2026 Guide)

The honest answer is “it depends on the cause”: basement waterproofing in Ottawa runs anywhere from a few hundred dollars for a single crack to the low tens of thousands for a full exterior membrane. This guide breaks down the typical ranges so you can budget before you book a free inspection.

Foundation crack injection: $400–$900 per crack

If you have a poured-concrete foundation and a single leaking crack, this is usually all you need. We inject resin that seals the crack through its full depth, typically in one visit with no excavation. It is the most common and most affordable, repair we do, especially in newer suburbs where settling causes hairline cracks. See foundation crack injection.

Interior weeping tile system: roughly $90–$160 per linear foot

For a high water table or seepage where the floor meets the wall, an interior drainage system is the workhorse fix. Priced by the perimeter length treated, a typical Ottawa basement lands in the $8,000–$15,000 range depending on size, finishing and whether a sump pit is added. It is less disruptive than exterior work and ideal for basements you want to finish. See interior weeping tile & drainage.

Exterior waterproofing membrane: ~$15,000–$30,000+

The gold-standard, longest-lasting fix and the most involved, because it means excavating to the footing, sealing the wall and laying new weeping tile. Cost depends on depth, access and how much of the foundation is treated. It is most often the right call for older stone or rubble foundations and chronic, long-standing leaks. See exterior waterproofing membrane.

Sump pump & battery backup: $1,200–$3,000

Whether installed on its own or as part of a drainage system, a quality sump pump with a battery backup is cheap insurance against a flooded basement during a spring storm or power outage. See sump pump installation & backup.

What changes the price in Ottawa specifically

Two local factors push Ottawa quotes around: the age of your home and the soil under it. Century homes in the Glebe and Hintonburg often need exterior work on porous stone foundations, while newer builds in Barrhaven usually just need a crack sealed. The region’s Champlain Sea “Leda” clay also drives a high spring water table, which can tip a job from a simple repair toward a full drainage system.

Get an exact number

Try our basement waterproofing cost calculator for a quick estimate from current Ottawa pricing. Ranges only get you so far, the real price depends on what’s actually causing your leak. We offer a free, no-obligation inspection across Ottawa and every suburb, with a written diagnosis and a fixed quote. Request your free quote here.

Local pages: Basement Waterproofing Kanata · Basement Waterproofing Barrhaven · Basement Waterproofing Orléans