Replacing a basement window well in Ottawa typically costs $600 to $1,800 per well in 2026 for a standard corrugated galvanized steel unit, including excavation, backfill, and fastening to the foundation. Larger egress-sized wells — the deep, stepped or terraced ones required for legal basement bedrooms — run roughly $2,500 to $6,500 each once you add the bigger dig, drainage stone, and a code-compliant ladder or built-in steps. Homeowners replacing several rotted or rusted-out wells at once usually pay $1,800 to $4,500 for a three-well package because the crew mobilizes only once. Ottawa's cl...
Material and size drive most of the price. A basic corrugated galvanized steel well — the grey semi-circular type on most Ottawa homes built since the 1970s — costs about $120 to $350 for the unit itself and $600 to $1,800 installed once excavation, anchors, drainage stone, and backfill are included. Polyethylene or composite wells with moulded steps cost slightly more at $250 to $600 for the unit and $900 to $2,200 installed, but they never rust, which matters in a city that salts its driveways...
Most Ottawa contractors have a minimum call-out of roughly $500 to $800, so one well is disproportionately expensive. Doing three standard steel wells in a single visit typically lands at $1,800 to $4,500 total, or about $600 to $1,500 per well — noticeably cheaper per unit than a one-off replacemen...
If you are finishing a basement bedroom or building a secondary dwelling unit, the Ontario Building Code requires an egress opening that a person can climb out of, and a standard 3-foot steel well will not qualify. Egress wells must be wide and deep enough to allow the window to swing fully open and provide clear escape space, and wells deeper than about 1.2 metres need a fixed ladder or built-in steps. In Ottawa, an egress-sized well alone runs $2,500 to $6,500 installed. If the window opening ...
Nearly every failed window well in Ottawa fails for the same reason: water. Spring melt and heavy rain fill the well faster than the soil can absorb it, the trapped water freezes and expands, and the panel buckles or pulls its anchors out of the foundation. A proper replacement includes 8 to 12 inches of clear stone in the base of the well, ideally with a drain connected down to the weeping tile at the footing, plus backfill graded away from the house so surface water never runs toward the well....
A clear polycarbonate window well cover costs $150 to $450 installed per well and keeps out snow, leaves, rain, and the occasional skunk. Custom-fit covers for egress wells cost $400 to $900 and must be removable from inside without tools to stay code-compliant.
Beyond the well type, several site conditions move the number. Access is the biggest one: a well against a rear wall in a fenced Glebe or Hintonburg backyard with no gate for a mini-excavator means hand digging, which can add $400 to $1,000 per well in labour. Depth matters too — an eight-foot-deep foundation wall requires taller stacked panels and more spoil to haul away. Landscaping restoration is often billed separately; re-laying sod, resetting interlock, or replanting a shrub bed can add $2...
Swapping a like-for-like window well is maintenance and generally does not require a City of Ottawa building permit. Enlarging a foundation opening, adding a new window, or creating egress for a bedroom does require one, and the work will be inspected. Any digging also requires a free Ontario One Call utility locate, which takes several business days, so build that into your timeline. When hiring, look for a contractor who does foundation or waterproofing work rather than a general handyman — th...
In 2026, expect $600 to $1,800 per well for a standard corrugated steel replacement including excavation and backfill, $900 to $2,200 for a composite well with moulded steps, and $2,500 to $6,500 for an egress-sized well. Replacing three wells in one visit usually totals $1,800 to $4,500.
An egress-sized window well runs about $2,500 to $6,500 installed. If the foundation opening also needs to be cut larger and a new window installed, a complete egress conversion typically costs $6,000 to $14,000 and requires a City of Ottawa building permit.
A like-for-like window well replacement is generally considered maintenance and does not need a building permit. You do need a permit if you enlarge the foundation opening, install a new or larger window, or create an egress opening for a basement bedroom.
Almost always because there is no clear-stone base or drain connection at the bottom of the well, or because the surrounding grade slopes toward the house. Ottawa's clay soil holds water, so a well without proper drainage ponds during spring melt and heavy rain, then freezes and deforms the panel.
A standard clear polycarbonate cover costs $150 to $450 installed per well in Ottawa. Custom covers for large egress wells run $400 to $900 and must be openable from inside without tools to meet code.