Lawn grading in Ottawa typically costs $1.50 to $4.00 per square foot in 2026, which puts most residential regrading projects between $1,800 and $6,500. A small corrective job — re-sloping a 400–600 sq ft strip along the foundation to stop water pooling against the house — commonly runs $1,200 to $2,800. A full backyard regrade with machine work, imported topsoil, and finish raking on a 2,000 sq ft area lands around $4,000 to $9,000. Simple leveling of minor dips using screened topsoil, without heavy equipment, can be as low as $600 to $1,500. The variables that move the number most in Ottawa ...
Grading quotes are built from four components. Labour and equipment: a two-person crew with a skid steer or mini-excavator runs roughly $110–$175 per hour in Ottawa, and most residential regrades take one to three days. Imported material: screened topsoil is about $45–$75 per cubic yard delivered and placed, and fill or granular for building up low areas runs $35–$60 per cubic yard. Disposal: hauling away excess soil costs roughly $250–$500 per truckload including tipping fees, which adds up quickly on cut-heavy jobs. Finishing: final raking, compaction, and either seed at $0.15–$0.35 per square foot or sod at $1.50–$2.75 per square foot to re-establish the lawn. Because these stack differently on every property, per-square-foot pricing is only a planning guide — a yard that needs 20 yards of topsoil imported costs very differently from one where soil is simply pushed from high spots to low ones.
Foundation perimeter re-slope (roughly 500 sq ft): $1,200–$2,800. Backyard leveling for a pool or shed pad: $2,000–$5,000. Full rear-yard regrade with drainage swale on a 2,000 sq ft area: $4,000–$9,000. New-build rough-to-final grade on a suburban lot: $3,500–$8,000.
Three local conditions drive most Ottawa grading work. First, heavy Leda and marine clay soils across much of the region drain slowly, so any low spot holds water for days after rain or spring melt. Second, new subdivisions in Barrhaven, Riverside South, Findlay Creek, and Orléans are built on compacted fill that settles unevenly over the first three to five years, creating dips and negative slope toward the house that weren't there at closing. Third, our freeze-thaw cycle heaves soil and can gradually flatten the slope builders originally set. The standard target is a minimum 2% fall — about 6 inches of drop over the first 10 feet — away from the foundation. When that's lost, water sits against the foundation wall, saturates the backfill, and finds its way through cracks or window wells, which is why grading is usually cheaper than the basement waterproofing it prevents. Ottawa homeowners often first notice the problem as a damp basement corner, efflorescence on the wall, or a persistent soggy patch that kills grass every spring.
Regrading fixes the surface slope, but not every water problem is a slope problem. If your yard is flat and surrounded by neighbouring properties draining toward you — common on older Ottawa infill lots — regrading alone has nowhere to send the water, and you'll need a drainage assembly. A shallow swale (a graded channel routing water to the street or a rear low point) costs about $25–$50 per linear foot to construct. A French drain with perforated pipe, clear stone, and geotextile runs roughly $60–$120 per linear foot in Ottawa. A catch basin tied into a buried solid pipe outlet adds about $800–$2,000 per basin. Downspout extensions buried to daylight cost $250–$600 each and are often the cheapest meaningful improvement. A competent contractor will walk the lot after rain if possible, identify whether the issue is slope, soil, or volume, and price only what's needed. Be skeptical of anyone who quotes a full regrade before diagnosing where the water actually comes from.
Before committing to a regrade, extend downspouts at least 6 feet from the foundation and clear window well drains. On a surprising number of Ottawa homes, that alone resolves the wet basement corner for a couple of hundred dollars.
You cannot regrade freely. The City of Ottawa requires that surface drainage not be altered in a way that directs water onto neighbouring properties, and in newer subdivisions the lot grading plan approved at the time of construction legally governs where water must flow. Changing that pattern — raising a rear yard, blocking a shared swale between two homes, or building up soil against a fence line — can trigger a drainage complaint, an order to restore the original grade, and civil liability with your neighbour. If your property is still within the builder's warranty or grading-deposit period, altering the grade yourself can also void the builder's obligation to correct settlement. Practically: keep soil at least 6–8 inches below the top of the foundation wall and below siding or brick veneer, maintain any existing rear or side swale, and check with the City before importing significant fill. A grading contractor who works regularly in Ottawa will know the subdivision grading plan requirements and design the fix around them.
Grading quotes vary more than almost any other landscaping service because scope is easy to define loosely. Ask each contractor for an itemized estimate showing equipment and labour hours, cubic yards of topsoil or fill imported, cubic yards hauled off site, any drainage components by linear foot, and the finishing method — seed, hydroseed, or sod — with those costs shown separately. Confirm rear-yard access, because if a machine can't fit through the side yard, the job becomes hand labour and the price can double. Ask what target slope they'll achieve and how they'll verify it (a laser level or transit, not eyeballing). Get three written quotes on identical scope, confirm liability insurance and WSIB, and ask for references from grading jobs done two or more springs ago so you can hear whether the fix actually held. Also clarify who is responsible if settlement occurs over the first year — reputable Ottawa contractors will return to top-dress minor settling within the first season.
Late spring through early fall is the working window. Grading in very wet spring conditions smears clay and compacts poorly; late August through September usually offers drier soil and lets new seed or sod establish before winter.
Lawn grading costs about $1.50–$4.00 per square foot in Ottawa in 2026. Most projects run $1,800–$6,500 total, with a small foundation re-slope costing $1,200–$2,800 and a full rear-yard regrade with drainage work reaching $4,000–$9,000.
The standard target is a minimum 2% grade — roughly 6 inches of drop over the first 10 feet away from the foundation. Soil should also sit 6–8 inches below the top of the foundation wall and below any siding or brick veneer.
Re-sloping the perimeter typically costs $1,200–$2,800. Adding drainage components costs more: a swale runs $25–$50 per linear foot, a French drain $60–$120 per linear foot, a catch basin $800–$2,000, and buried downspout extensions $250–$600 each.
A building permit is generally not required for minor lawn grading, but you must not redirect drainage onto neighbouring properties, and subdivision lots are governed by an approved lot grading plan. Confirm with the City of Ottawa before importing significant fill or altering an existing swale.
As a rule of thumb, 1 cubic yard covers about 100 square feet at 3 inches deep. A 2,000 sq ft area needing 3 inches of topsoil takes roughly 20 cubic yards, which at $45–$75 per yard delivered and placed is about $900–$1,500 in material alone.
Late spring through early fall works, but late August to September is often best. Soil is drier and easier to shape than in spring, and new seed or sod has time to establish before winter. Avoid grading saturated clay, which compacts poorly.