A new deck in Toronto costs about $15,000 to $45,000 installed in 2026 for most backyards, and $45,000 to $75,000 for large multi-level builds. A 200 to 300 sq ft pressure-treated deck runs about $15,000 to $25,000; the same space in composite usually costs 30 to 50 percent more. Building takes 1 to 3 weeks once the permit is approved, and Toronto needs a building permit when any part of the deck is more than 60 cm (24 in) above the ground.
Prices are 2026 planning ranges for Toronto and the GTA, including labour and materials, before HST. They are meant for budgeting; your written estimate is based on your property.
Deck Cost by Material
| Decking material | Installed cost per sq ft | 250 sq ft deck | Lifespan | Upkeep |
|---|---|---|---|---|
| Pressure-treated wood | $50 – $80 | $12,500 – $20,000 | 15 – 25 years | Stain every 1 – 2 years |
| Cedar | $60 – $95 | $15,000 – $23,750 | 20 – 30 years | Stain or seal every 2 – 3 years |
| Composite (Trex, TimberTech) | $75 – $110 | $18,750 – $27,500 | 25 – 30+ years | Wash only |
| PVC decking | $85 – $120 | $21,250 – $30,000 | 30+ years | Wash only |
Costs per square foot include framing, footings, decking, standard stairs and labour. Railings, lighting and a permit are listed below.
Deck Cost by Project Type
| Project | Typical 2026 cost |
|---|---|
| Small pressure-treated deck (200 – 300 sq ft) | $15,000 – $25,000 |
| Mid-size cedar or composite deck (300 – 500 sq ft) | $25,000 – $45,000 |
| Large multi-level deck (500 – 800 sq ft) | $45,000 – $75,000 |
| Rooftop deck | $30,000 – $60,000+ |
| Pool or hot tub deck surround | $15,000 – $40,000 |
| Pergola added to a deck | $8,000 – $25,000 |
Extra Costs to Plan For
- Removing and disposing of an old deck: about $1,500 to $4,000.
- Railings: about $80 to $150 per linear foot for aluminum, and $250 to $450 for glass.
- Drawings and the building permit: about $1,000 to $2,500, including the City fee.
- Wider or extra stairs, landings and skirting.
- Built-in lighting, benches and planters.
- Tight access, where materials must be carried through the house or over a fence.
What Drives the Cost
Height and footings
Higher decks need deeper, larger footings, heavier posts and guards. We set footings below the frost line so the deck does not heave in Toronto winters.
Decking material
Composite and PVC cost more up front but need no staining. Pressure-treated wood costs least but needs regular upkeep. Compare them in pressure-treated vs cedar vs composite decking for Ontario winters.
Shape and levels
Multi-level decks, curves, picture-frame borders and built-ins add framing and labour time.
Toronto Deck Permit Rules
- A building permit is needed if any part of the deck is more than 60 cm (24 in) above the ground, or if it has a roof.
- Guards are required when the deck is more than 60 cm above the ground. They must be at least 90 cm (36 in) high, or 1.07 m (42 in) when the deck is more than 1.8 m above the ground.
- Every deck must meet zoning setbacks from the lot lines, even when no permit is needed.
- Private trees 30 cm or more in diameter are protected. Footings dug near one can need a tree permit.
Other GTA cities have their own rules. We confirm them with the City and handle the permit for you. For the full process, read our complete guide to backyard deck construction in Toronto.
Frequently Asked Questions
How much does a deck cost in Toronto?
In 2026, most new decks in Toronto cost $15,000 to $45,000 installed. A small pressure-treated deck of 200 to 300 sq ft runs about $15,000 to $25,000, and a 300 to 500 sq ft cedar or composite deck about $25,000 to $45,000. Large multi-level decks run $45,000 to $75,000.
How much does a deck cost per square foot in Toronto?
Installed, expect about $50 to $80 per sq ft for pressure-treated wood, $60 to $95 for cedar, $75 to $110 for composite and $85 to $120 for PVC decking, including framing, footings and labour.
Do I need a permit to build a deck in Toronto?
Yes, if any part of the deck is more than 60 cm (24 in) above the ground, or if you add a roof over it. Low decks usually do not need a permit but must still meet zoning setbacks.
How long does it take to build a deck?
Most decks take 1 to 3 weeks to build once the permit is approved. Multi-level, rooftop and covered decks take longer.
Get a Written Estimate for Your Deck
Every yard is different, so the only reliable number is one based on your property. We visit, measure and give you a clear written estimate, free and with no obligation. We reply to every enquiry within 24 hours. Request your free estimate or call 647-642-4664.
