Deck Cost Calculator
Estimate what a new deck will cost in Canada based on your size, material choice, and location. Adjust for railing, stairs, and permits to get a realistic budget before calling contractors.
Your Deck Details
Cost Estimate
Estimates are based on mid-range Ontario contractor rates and typical material costs as of 2025–26. Actual quotes will vary by site conditions, contractor, and material availability. Always get 2–3 written quotes before starting.
Assumptions & Methodology
This calculator uses mid-range contractor rates for a standard residential deck build in Ontario, adjusted by regional labour multipliers for other provinces.
- Decking boards: PT ~$5.50/sq ft, Cedar ~$9/sq ft, Composite ~$16/sq ft, PVC ~$21/sq ft. Includes ~10% waste allowance.
- Framing lumber (joists, blocking, rim joist, beam): Ground $2/sq ft, Standard $2.75/sq ft, Elevated $4.50/sq ft. Elevated uses heavier stock and a doubled beam.
- Posts & footings: Ground-level decks use concrete blocks (no post cost). Standard height: one 4×4 post per ~32 sq ft at $25/post + $60/footing. Elevated: one 6×6 post per ~25 sq ft at $55/post + $100/footing (deeper concrete tube for Ontario frost line).
- Hardware: Joist hangers, post bases, lag screws, bolts, and fasteners — Ground $1/sq ft, Standard $1.50/sq ft, Elevated $2/sq ft.
- Labour — framing: Ground 2 hrs/100 sq ft, Standard 3.5 hrs/100 sq ft, Elevated 7 hrs/100 sq ft (working at height, heavy beams).
- Labour — decking installation: 3.5 hrs/100 sq ft for all heights.
- Labour — footing work: Ground 0 hrs, Standard 2.5 hrs/footing, Elevated 5 hrs/footing (excavation + tube form + pour + post setting). An elevated 100 sq ft deck with 4 footings adds ~20 hrs of footing labour.
- Labour — miscellaneous: 1.5–3 hrs/100 sq ft for ledger, fascia, cleanup. Base rate $85/hr (Ontario).
- Regional multipliers: BC ×1.12, AB ×1.08, ON ×1.00, QC ×0.88, Maritime ×0.82.
- Railing (installed, material + labour): PT wood ~$100/lf, Cedar ~$140/lf, Composite ~$185/lf, PVC ~$215/lf. Rate matches the selected decking material.
- Stairs: ~$600/set installed (standard 3–5 riser stringer).
- Permits: ON $500, BC $600, AB $400, QC/Maritime $300 — flat regional estimates.
- Does not include landscaping, structural engineering (required for some elevated decks), or below-grade waterproofing.
Frequently Asked Questions
How much does a deck cost in Canada?
A typical 200–300 sq ft pressure treated deck in Ontario costs $8,000–$18,000 installed, including framing, decking, railing, and one set of stairs. Composite decks run $16,000–$30,000 for the same size. Western Canada (BC especially) runs 10–15% higher due to labour rates.
Cost per sq ft ranges from about $35–$50 for pressure treated up to $70–$100+ for composite or PVC with premium railing.
What's the cheapest type of decking material?
Pressure treated (PT) lumber is the most affordable — typically $4–6/sq ft for material alone. It requires staining or sealing every 2–3 years and will grey and check over time without maintenance. Cedar is a step up in appearance and natural rot resistance, costing $7–10/sq ft for materials.
Composite and PVC cost more upfront ($12–22/sq ft for material) but have virtually no maintenance beyond occasional cleaning, making the lifetime cost often comparable to wood.
Do I need a permit to build a deck in Ontario?
In most Ontario municipalities, yes — a building permit is required for any deck that is attached to the house, or any deck over 10 sq ft that is more than 600mm (24 inches) off the ground. Permit costs typically run $300–$700 depending on the municipality and deck size. Skipping permits can cause problems when selling the home.
Should I build a deck myself or hire a contractor?
A skilled DIYer can save 40–50% on a basic pressure treated deck — labour is typically half the total cost. However, elevated decks, complex layouts, or anything requiring a structural engineer should be left to professionals. Also consider: permits require inspections, framing mistakes are expensive to fix, and many lenders/insurers ask about unpermitted structures when you sell.
How do I get an accurate quote from a contractor?
Get at least 3 quotes from licensed contractors. Provide the same information to each: deck dimensions, preferred material, height off grade, number of stairs, railing requirements, and whether you need permit assistance. Ask each quote to break out material vs. labour so you can compare apples-to-apples. Be cautious of quotes significantly below the others — they often indicate missing scope or unlicensed work.
How Much Does a Deck Cost in Canada?
A new deck is one of the most popular home improvement projects in Canada — and for good reason. A well-built deck adds usable outdoor living space, improves curb appeal, and typically returns 60–80% of its cost at resale. But costs vary widely depending on size, materials, your province, and how complex the build is.
Average Deck Costs by Material (Ontario, 2025)
For a typical 200 sq ft deck in Ontario with standard railing and one set of stairs, expect to pay:
- Pressure Treated: $9,000–$14,000 installed
- Cedar: $13,000–$20,000 installed
- Composite (e.g. Trex): $18,000–$28,000 installed
- PVC / Capped Composite: $22,000–$35,000 installed
What Drives Deck Costs Up?
Several factors push deck costs beyond the baseline estimate:
- Deck height: Elevated decks need larger posts, beam spans, bracing, and more labour — sometimes requiring a structural engineer for decks over 8 ft high.
- Material quality: Premium composite brands like Trex Transcend or TimberTech Azek cost significantly more than builder-grade composites.
- Railing system: Glass panel railings can cost $300–500/linear ft vs. standard balusters at $150–200/lf.
- Site access: Tight backyards, slopes, or rocky ground all add labour time.
- Province: BC labour rates are 10–12% higher than Ontario; Quebec and Maritime rates run 10–20% lower.
DIY vs. Hiring a Pro
An experienced DIYer can save 40–50% on a ground-level or standard-height deck. The biggest savings are in framing and decking installation, which are learnable skills. However, you should strongly consider a professional for: elevated decks requiring engineered footings, decks attached to the house (ledger flashing is a common DIY failure point), and any jurisdiction where inspections are strict.
Tips for Getting Accurate Contractor Quotes
Use this calculator to establish your budget range before calling contractors. Then get 3 written quotes that break out materials and labour separately. Ask specifically about permit pull fees, footing depth (frost line in Ontario is 1.2m), and what happens if they discover unexpected site conditions. A good contractor will price these contingencies upfront rather than surprising you with change orders.