Deck Building Cost Calculator

Estimate deck construction costs for Ontario homes — wood, cedar, and composite options.

Deck Size

Material

City

Include Deck Stairs

Standard staircase — adds ~$1,200

Add Pergola / Shade Structure

Adds ~$4,500

Estimated Cost

Deck Construction Cost

$10,500

Range: $8,500 – $12,000

📋 Permit Required

Decks attached to the house or over 24" high need a permit in Ontario. Add $200–$600 to your budget.

📸 Get Accurate AI Estimate →Deck Builder Guide: Whitby →

Ontario Deck Building Costs

Deck construction costs in Ontario range from $7,000 (small pressure-treated deck) to $50,000+ (large multi-level composite deck with pergola). Composite decking costs 40–60% more than pressure-treated upfront but requires no staining or sealing — lower 10-year lifecycle cost. Cedar is the best of both worlds — natural beauty with good rot resistance, mid-range cost.

Deck Builders Whitby Ontario Cost Guide All Guides