Replacing the siding on an Ottawa home costs roughly $8 to $22 per square foot of wall area installed in 2026, which works out to about $14,000 to $38,000 for a typical two-storey detached house with 1,700–1,900 sq ft of exterior wall. Vinyl remains the budget choice at approximately $8–$12 per sq ft installed, engineered wood such as LP SmartSide lands around $12–$17, and fibre cement (James Hardie and similar) runs about $15–$22 per sq ft because the boards are heavy, require specialized cutting, and take longer to hang. Those figures include tear-off of the old cladding, house wrap, trim, a...
Material choice sets the baseline for your budget. Standard vinyl siding is the most common replacement in Ottawa's suburbs and runs about $8–$12 per square foot installed, including trim and J-channel. Insulated vinyl, which has a foam backer laminated to the panel, adds roughly $2–$4 per sq ft but improves impact resistance and reduces the wavy look on uneven walls. Engineered wood siding — LP SmartSide is the dominant brand locally — costs about $12–$17 per sq ft installed and gives a deeper wood grain with far less maintenance than real cedar. Fibre cement runs approximately $15–$22 per sq ft installed; it is non-combustible, holds paint for 15+ years, and handles our freeze-thaw swings extremely well, but the material is heavy and cutting it requires dust control, which raises labour. Natural cedar and metal panel siding sit at the top, commonly $20–$30+ per sq ft. Most Ottawa homes end up with a mix: full-wall cladding plus accent panels, stone veneer at the front, and aluminium soffit and fascia.
A 1,600 sq ft two-storey in Barrhaven or Orléans typically has around 1,700–1,900 sq ft of wall area once you subtract windows and doors. In vinyl, that is roughly $14,000–$22,000 installed. The same house in fibre cement commonly lands between $28,000 and $38,000.
A complete siding quote should cover removal and disposal of the existing cladding, inspection of the sheathing, a new water-resistive barrier (house wrap or a self-adhered membrane), starter strips, corner and window trim, caulking, and cleanup with magnetic sweeping for nails. The costs that appear after tear-off are the ones that blow budgets. Rotted or delaminated sheathing is common on 1970s–1990s Ottawa homes and typically adds $80–$150 per sheet of replacement OSB or plywood installed. Damaged or missing flashing at windows and decks often needs to be rebuilt. Homes with three storeys, steep grades, or tight side yards need scaffolding rather than ladders, adding $1,500–$4,000 to the job. Older homes in Westboro, Hintonburg, and the Glebe may reveal asbestos-containing board or insulation behind old cladding, which requires certified abatement under Ontario regulations and can add several thousand dollars. Ask every contractor to state a per-sheet sheathing repair rate in the quote so surprises are priced in advance rather than negotiated mid-project.
A siding replacement is the single best opportunity to improve your home's thermal envelope, because the walls are already stripped. Adding 1 to 2 inches of rigid foam or mineral wool continuous insulation over the sheathing typically costs an extra $3.50–$7 per square foot, including the strapping and longer fasteners needed to hang cladding over it. On an average Ottawa house that is roughly $6,000–$13,000 more. In return you break the thermal bridging through the studs, which can cut heat loss through the walls meaningfully and noticeably reduce cold-wall drafts in January. Continuous exterior insulation also moves the dew point outward, which helps keep the sheathing dry through our long heating season. Some exterior insulation and air-sealing retrofits may qualify for federal or provincial efficiency incentives, so it is worth checking current program eligibility and booking any required pre-retrofit energy assessment before the crew starts, since most programs will not pay retroactively.
Retrofitting exterior insulation later means paying to remove brand-new siding. If continuous insulation is on your wish list at all, the incremental cost is far lower when bundled into the siding job.
In most cases, replacing siding like-for-like on a detached Ottawa home does not require a building permit, because it is considered maintenance rather than structural work. Permits do come into play when you change the wall assembly — adding thickness that affects setbacks, replacing structural sheathing, altering window openings, or working on a property in a heritage conservation district, where exterior appearance changes are reviewed. Always confirm with the City of Ottawa before ordering material if your project touches any of those. Timing matters too: most siding products have installation temperature limits, and vinyl becomes brittle and prone to cracking in deep cold, so the practical Ottawa season runs from roughly late April to early November. Crews book up fast for summer, and quotes taken in February for a spring start are usually 5–10% better than the same job quoted in peak July demand. Building the project into a shoulder-season schedule is one of the easiest ways to save money.
Collect at least three written, itemized quotes and insist that each one lists the same square footage of wall area, the exact product line and colour, the type of water-resistive barrier, the fastener schedule, the flashing details at windows and doors, and the per-sheet rate for sheathing repair. Vague lump sums are how a $19,000 job becomes $27,000. Confirm the contractor carries general liability insurance and WSIB clearance, and ask whether the crew is employed by the company or subcontracted. Manufacturer warranties on vinyl and fibre cement only hold if the product is installed to spec, so ask whether the installer is certified by the brand — Hardie and LP both run installer programs. Finally, get the workmanship warranty in writing, separate from the material warranty; five years is a reasonable local standard. Verifying credentials and reading the fine print before you sign takes an hour and routinely saves five figures in disputes.
In 2026, siding replacement in Ottawa costs roughly $8–$22 per square foot of wall area installed, or about $14,000–$38,000 for an average two-storey detached home. Vinyl is $8–$12 per sq ft, engineered wood $12–$17, and fibre cement $15–$22, all including tear-off, house wrap, trim, and disposal.
Standard vinyl siding runs about $8–$12 per square foot installed in Ottawa, so a typical house with 1,700–1,900 sq ft of wall area costs roughly $14,000–$22,000. Insulated vinyl adds about $2–$4 per sq ft.
For many homeowners, yes. Fibre cement costs about 50–80% more than vinyl but resists freeze-thaw damage, will not warp in summer heat, is non-combustible, and holds factory paint for 15 years or more. It is heavier and slower to install, which is why labour makes up a larger share of the price.
Usually not. Like-for-like siding replacement on a detached home is generally treated as maintenance. A permit or review is typically required if you change the wall assembly, replace structural sheathing, alter openings, or own a property in a heritage conservation district. Confirm with the City of Ottawa first.
The most common are rotted sheathing (about $80–$150 per replacement sheet installed), rebuilt window and deck flashing, scaffolding on tall or sloped lots ($1,500–$4,000), and asbestos abatement in older homes. Ask for a per-sheet sheathing rate in writing before work begins.
Late April through early November is the practical window, since vinyl becomes brittle in deep cold and most products have minimum installation temperatures. Booking in late winter for a spring start often saves 5–10% versus peak summer demand.