Roofing Contractors in Ontario

About roofing in Ontario

Ontario asphalt shingle replacements typically run $8,000-$18,000 for a standard detached home. Most full replacements require a municipal building permit. The best window is May through October - cold adhesive strips on shingles activate in warm weather. We review local contractors for licensing and insurance where required, then match you with options that fit your project.

Typical roofing costs in Ontario (2026)

Asphalt shingle replacement (avg. 1,500 sq ft home) $8,000-$18,000

Flat roof replacement (TPO or EPDM) $5,000-$12,000

Emergency leak repair $500-$2,500

Eavestrough replacement (full run) $1,500-$4,000

Partial re-shingle / patching $1,000-$3,500

contractor.ca market research, Ontario contractor quotes (2025-2026). Costs vary by municipality, roof pitch, material grade, and staging access.

Frequently Asked Questions

How much does a roof replacement cost in Ontario?

A standard asphalt shingle replacement for a detached home in Ontario typically runs $8,000-$18,000, depending on roof size, pitch, and material grade. Properties with steep pitches, multiple valleys, or limited staging access cost more. Comparing quotes is the best way to find accurate local pricing.

Do I need a permit for a roof replacement in Ontario?

Most Ontario municipalities require a building permit for full roof replacements that strip the deck. Re-shingling over existing layers may not require a permit - verify with your local building department before work starts. Your contractor should handle permit applications if required.

What should I check before hiring a roofing contractor in Ontario?

Ask for proof of workers compensation coverage, a current certificate of insurance ($2M general liability minimum), and that the contractor will pull any required permits. Ask for manufacturer certification if you want a full system warranty - for example, GAF Certified or IKO Shield Pro.

What is the best time of year to replace a roof in Ontario?

Spring through early fall (May to October) is the optimal roofing season in Ontario. Asphalt shingle adhesive strips activate in warmer weather, and crews work faster without winter hazards. Emergency repairs happen year-round, but a planned replacement benefits from warm temperatures.

What are the signs I need a new roof?

Key warning signs include curling or missing shingles, granule loss visible in gutters, dark patches or moss on the roof surface, and daylight visible through the attic. A roofing contractor can assess whether repair or full replacement is the right call - get an inspection before the problem gets worse.

How long does a roof replacement take in Ontario?

A standard residential roof replacement takes one to two days for an experienced crew. Larger or more complex roofs with multiple pitches, skylights, or chimney flashings take longer. Weather delays can extend the timeline - confirm how your contractor handles interruptions and whether the home is tarped overnight.