How Much Does a Deck Cost in the GTA? (2026 Guide)
Deck building in the GTA typically costs $150–$300+ per square foot for a composite or pressure-treated deck. This guide covers 2026 pricing for decks, pergolas, fences, and outdoor structures across Toronto and surrounding areas.
2026 Price Ranges
| Job | Low | High |
|---|---|---|
| Pressure-treated deck (10×10) | $4,000 | $8,000 |
| Composite deck (10×10) | $7,000 | $15,000 |
| Hardwood deck (10×10) | $8,000 | $18,000 |
| Deck board replacement (per sq ft) | $12 | $25 |
| Pergola installation | $3,000 | $10,000 |
| Wood fence (per linear ft) | $30 | $70 |
| Composite fence (per linear ft) | $60 | $120 |
| Concrete footings (per footing) | $200 | $500 |
* Prices exclude HST. Ranges reflect GTA market rates as of 2026.
What affects the price?
- ✓Material (pressure-treated, composite, hardwood)
- ✓Size and height of deck
- ✓Complexity (multiple levels, built-in seating)
- ✓Permit and inspection requirements
- ✓Site access and excavation needed
📋Permits & Regulations
In Ontario, decks attached to the house or more than 24 inches off the ground require a building permit. Detached decks and low-profile decks may be exempt — check with your local municipality.
Tips before you hire
- ★Composite decking costs more upfront but saves significantly on maintenance over 20 years
- ★Ensure footings go below the frost line (1.2m minimum in the GTA)
- ★Inspect deck ledger boards annually — improper attachment is the leading cause of deck collapse
- ★Check if your municipality has a subsidy for naturally rot-resistant wood
Frequently asked questions
How long does a deck permit take in Toronto?
Deck permit applications in Toronto typically take 2–8 weeks. Your contractor should include permit application in the project timeline.
What is the best decking material for Ontario winters?
Composite decking (e.g., Trex, TimberTech) is the best choice for Ontario winters. It resists freeze-thaw, does not splinter, and does not require annual sealing or staining.
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