Roof Replacement Cost per Square Foot — Ontario 2026

Roofing prices in Ontario are calculated primarily by square footage. Understanding the 2026 cost-per-sq-ft ranges helps homeowners budget accurately and compare quotes between contractors. This guide breaks down real Ontario roofing prices per square foot for asphalt shingles, G90 steel metal roofing, and standing seam systems across the province.

Ontario 2026 Roofing Cost per Square Foot (Installed)

Below are the current 2026 sq.ft pricing ranges for a standard residential roof in Ontario:

Roofing System	2026 Price per Sq.Ft
3-Tab Asphalt Shingles	$3.75 – $5.50 / sq.ft
Architectural Asphalt Shingles	$4.75 – $7.50 / sq.ft
Premium Laminate Asphalt	$5.75 – $9.25 / sq.ft
G90 Steel Metal Shingles	$10.75 – $17.50 / sq.ft
Standing Seam Steel	$14.00 – $25.00 / sq.ft

These sq.ft cost ranges include materials, labour, ventilation upgrades, disposal, fasteners, underlayment, and flashing replacements.

How Roofing Contractors Measure Roof Size

Roofers measure roofs using “squares.” One roofing square equals:

1 square = 100 sq.ft

Most Ontario homes fall between 15 and 28 squares depending on layout, garage size, and pitch.

Average Total Roof Replacement Cost in Ontario (Based on Sq.Ft)

Home Size	Sq.Ft of Roofing	2026 Cost Range
Small Home	1,200–1,500 sq.ft	$6,500 – $11,500 (asphalt) \| $15,000 – $24,000 (metal)
Medium Home	1,700–2,300 sq.ft	$8,500 – $16,500 (asphalt) \| $21,500 – $38,500 (metal)
Large Home	2,500–3,500 sq.ft	$11,500 – $24,000 (asphalt) \| $28,500 – $55,000+ (metal)

What Increases Cost Per Square Foot

Ontario roofing costs increase when the roof has:

Steep pitch requiring additional safety equipment.
Multiple valleys and architectural complexity.
Skylights, chimneys, or dormers that require flashing work.
Ventilation upgrades like ridge venting and intake correction.
Plywood replacement due to heat or moisture damage.
Snow-load engineering required in Northern Ontario & Ottawa Valley.

These factors directly increase installation time and material usage.

Labour vs Material Cost Breakdown

Typical Ontario roofing project cost structure:

Materials: 45%–60%
Labour: 40%–55%

For metal roofing, labour percentages may increase due to more specialized installation practices.

Regional Sq.Ft Cost Differences in Ontario

GTA: Highest due to labour demand.
Ottawa: Higher ventilation and snow-load requirements.
Southwestern Ontario: Most competitive pricing.
Northern Ontario: Higher travel and logistics costs.