How Much Does a Roof Replacement Cost in Ottawa Valley? (2026 Guide)

One of the first questions homeowners ask when they start thinking about a new roof is: how much is this going to cost? It's a fair question — and the honest answer is that it depends on several factors. Here's a straightforward breakdown of what goes into the price of a roof replacement in Ottawa Valley and Lanark County.

For a typical single-family home in the Ottawa Valley region, a full asphalt shingle roof replacement generally falls in the range of $8,000 to $20,000+, depending on the size and complexity of your roof, the materials chosen, and the contractor you hire.

That's a wide range — so let's break down what moves the number.

Roofing is priced by the square (100 sq ft). A larger home means more material and more labour. A steep or complex roof (multiple valleys, dormers, skylights) takes longer to work on safely and adds to the cost.

Standard 3-tab asphalt shingles are the most affordable option. Architectural (laminate) shingles cost more but last longer and look better. Premium options like metal roofing or cedar shakes carry a higher upfront cost but can outlast asphalt by decades.

Most Ottawa Valley homeowners choose architectural shingles from brands like GAF, CertainTeed, or Owens Corning — a good balance of durability, warranty, and cost.

If your existing shingles need to be removed (rather than re-roofed over), there's a cost for labour and disposal. In most cases, a full tear-off is the right call — it lets the contractor inspect the deck and fix any rot or damage before the new shingles go on.

Once the old shingles are off, the contractor can see the condition of your roof deck. Rotted or damaged boards need to be replaced before new shingles are installed. This is a variable cost that can't always be predicted until the tear-off is complete.

Proper attic ventilation extends the life of your new roof and protects your warranty. If your current ventilation is inadequate, upgrading it adds to the project cost — but it's worth it. Flashing around chimneys, skylights, and vents also needs to be replaced or resealed.

Get at least two or three quotes from licensed, insured roofing contractors. Be wary of quotes that are significantly lower than the others — they often mean corners are being cut on materials, labour, or disposal.

Ask each contractor:

• Are you licensed and insured? (WSIB coverage?)
• What materials are you using, and what's the manufacturer warranty?
• What's your workmanship warranty?
• Does the quote include tear-off and disposal?
• What happens if you find deck damage?

A reputable contractor will answer all of these without hesitation.

Clean Slate Roofing is currently offering a new customer discount on full roof replacements across Ottawa Valley and Lanark County. See the offer and request your free quote — we'll give you a straight, itemized estimate with no pressure.

Licensed, insured, WSIB certified, and backed by a 10-year workmanship warranty. Call us at (343) 552-8198 — Mon–Fri 7 AM–9 PM, Sat–Sun 7 AM–8 PM.