How Much Does a Roof Replacement Cost in the GTA?
Roof replacement cost in the GTA varies widely because every roof is different. Rather than quote a single number that won't apply to your home, this guide explains the factors that drive pricing so you can understand any quote you receive.
Roof size and pitch
Roofers measure area in 'squares' (100 square feet). Larger roofs require more material and labour. Pitch matters too: steeper roofs need additional safety equipment and take longer to work on, increasing labour cost.
Complex roofs with many valleys, dormers, and hips also cost more because each intersection adds flashing detail.
Tear-off and decking
Removing existing shingle layers adds labour and disposal cost. If multiple old layers are present, tear-off takes longer. During tear-off, rotted plywood or board decking is discovered and replaced, priced per sheet.
You can't know decking condition until the old roof is off, so reputable quotes include a per-sheet price for decking replacement.
Material tier and accessories
Standard architectural shingles cost less than luxury or impact-resistant shingles. Ice & water shield, synthetic underlayment, drip edge, ridge vents, and flashing all factor into the total.
Upgrading ventilation or adding skylight flashing increases scope and cost.
Why written quotes matter
A fixed, written quote with no hidden fees protects you from surprise charges. Beware of quotes that are far below others—they often omit underlayment, flashing, or disposal.
Compare quotes line by line, not just the bottom line, to understand what's included.
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Frequently Asked Questions
What is the average cost to replace a roof in Toronto?
Cost varies with size, pitch, materials, and decking. We provide fixed written quotes after inspection rather than averages that won't match your home.
Why do quotes vary so much between contractors?
Quotes differ in materials, scope, and quality. Compare line items, not just totals, to see what each quote includes.
Have a roofing question?
Our Toronto team answers roofing questions and provides written estimates across the GTA.
