Roof Replacement Cost in Thornhill (2026 Guide)
Roof Replacement costs in Thornhill (York Region). Updated 2026 pricing based on local labour rates and material costs.Labour in Thornhill is typically 4% lower than Toronto core.
Low Estimate
$6,700
Average
$10,550
High Estimate
$19,200+
Roof Replacement in Thornhill: What to Expect
Thornhill straddles Vaughan and Markham and has a dense concentration of 1980s–2000s detached homes. Contractor availability is strong and pricing is close to Toronto rates.
Region
York Region
Avg Home Price
$1.15M
Labour vs Toronto
-4%
Roof Replacement Cost Breakdown — Thornhill (2026)
Prices adjusted for Thornhill labour market. Includes materials + labour unless noted.
Cost Breakdown
| Item | Low Estimate | High Estimate | Notes |
|---|---|---|---|
| Asphalt Shingles (1,500 sqft) | $6,700 | $11,500 | Most common in Toronto |
| Architectural/Dimensional Shingles | $8,650 | $15,350 | Better curb appeal |
| Metal Roofing | $13,450 | $28,800 | 50+ year lifespan |
| Flat Roof (EPDM) | $7,700 | $17,300 | Common in Toronto semis |
| Flat Roof (TPO) | $8,650 | $19,200 | Energy efficient |
| Tear-Off + Disposal | $1,450 | $3,850 | Old shingles removal |
What Affects Roof Replacement Cost in Thornhill?
Roof size and pitch
Labour is quoted per square (100 sqft). Steep pitches require safety equipment and take longer, adding 15–30% to labour costs.
Material choice
3-tab asphalt shingles are cheapest ($80–$120/square material). Architectural shingles ($120–$180/square) are standard today. Metal roofing ($350–$600/square) lasts longest.
Number of layers to remove
If there are two or more layers of existing shingles, they must all be torn off before new installation. Each layer removal adds $800–$2,000.
Flashing and ventilation
Replacing chimney flashing ($400–$900), ridge vents, and soffit vents during a re-roof saves money versus doing it separately later.
Budget Examples for Thornhill
Toronto Semi-Detached ($7,000–$10,000)
$8,150
- ✓~1,200 sqft
- ✓Asphalt shingles
- ✓Tear-off one layer
- ✓Ice & water shield
- ✓Venting
Detached Home ($10,000–$16,000)
$12,500
- ✓~1,800 sqft
- ✓Architectural shingles
- ✓Tear-off
- ✓Flashing
- ✓Ridge vent
Premium Metal Roof ($18,000–$30,000)
$23,050
- ✓~1,800 sqft
- ✓Steel standing seam
- ✓50-yr warranty
- ✓Full tear-off
- ✓New venting
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