Deck Cost Guide · Toronto & GTA
How Much Does a Deck Cost in Toronto and the GTA?
Updated October 20, 2026
Most new decks we build across Toronto and the GTA land between $15,000 and $60,000 installed. Pressure-treated decks usually run $45 to $65 per square foot, and composite decks $65 to $95 per square foot.
These are planning ranges from our own quotes, not instant prices. Where your deck lands in the range comes down to the lot: how high the deck sits, how many stairs it needs, what has to come out first, and how the material gets to the backyard.
Price per square foot by material
| Material | Installed price | Best for |
|---|---|---|
| Pressure-treated wood | $45 – $65 / sq ft | Open, sunny yards and tighter budgets. Needs cleaning and sealing every few years. |
| Composite (capped) | $65 – $95 / sq ft | Shaded, damp or busy decks. No staining, and the colour holds for decades. |
| PVC, multi-level or waterproofed | From $95 / sq ft | Walkouts with dry space below, glass railing, or two or more levels. |
Installed prices include footings, framing, decking and a standard railing on a straightforward lot.
Typical totals by deck size
| Deck size | Pressure-treated | Composite |
|---|---|---|
| 300 sq ft (about 15 × 20 ft) | $13,500 – $19,500 | $19,500 – $28,500 |
| 400 sq ft (about 20 × 20 ft) | $18,000 – $26,000 | $26,000 – $38,000 |
| 500 sq ft (about 20 × 25 ft) | $22,500 – $32,500 | $32,500 – $47,500 |
Smaller decks cost more per square foot, because footings, stairs, permits and setup do not shrink with the deck.
What moves the price
Two decks of the same size can be quoted thousands apart. These are the items that usually make the difference:
- Height. A deck more than about 60 cm (24 in) off the ground needs guards, more structure and, in most cities, a permit.
- Stairs and landings. Every run of stairs adds framing, footings and railing.
- Railing. Glass and aluminum railing cost more than wood or composite pickets.
- Tear-out. Removing an old deck, concrete or a failed retaining wall comes first.
- Access. If material has to be carried through a narrow side yard, labour goes up.
- Footings. Old fill, roots and buried concrete slow down digging to frost depth (at least 1.2 m).
- Extras. Skirting, under-deck drainage, lighting, privacy screens and a pergola or roof.
How to get an exact price
Send us the address, a few photos of the yard and the rough size you have in mind. If you are not sure on size or layout yet, you can design the deck in our free 3D planner and send the design straight to us. We follow up with a site visit and a written quote.
Deck cost by city
Material prices are the same across the GTA. What changes from city to city is the lot: access, grade and the permit side. Here is what we run into most in each area we build.
Toronto
4 ATB deck projects here- What moves the price here
- Rear laneways and narrow side yards mean most Toronto deck material arrives by hand from the street, not by truck to the backyard. Factor in extra labor time on any job where the yard has no driveway access.
North York
2 ATB deck projects here- What moves the price here
- Tree root zones in established North York yards restrict where footings can go. We probe before we post, and sometimes that means the footing layout shifts from what the drawings show.
Scarborough
2 ATB deck projects here- What moves the price here
- Split-level footing work on grade drops requires extra layout time — each post elevation gets checked individually, and concrete curing on a stepped site adds days that a flat pour does not.
Etobicoke
2 ATB deck projects here- What moves the price here
- Tree root zones and canopy protection requirements add time to the layout stage. In treed yards, we locate footings before anything is marked or dug.
Mississauga
6 ATB deck projects here- What moves the price here
- Waterproof system installation below elevated walkout decks adds time. The membrane, drainage layer, and any slope correction have to be complete and inspected before the deck frame goes on top. Skipping steps here means water problems in the lower level.
Brampton
8 ATB deck projects here- What moves the price here
- Deep lots add real labour time. Carrying material across 60 to 100 feet of yard on jobs with limited side access is a half-day difference on a large build — that has to be in the schedule.
Caledon
5 ATB deck projects here- What moves the price here
- Permit processing through Town of Caledon Building Services typically runs 3 to 8 weeks. That is longer than urban GTA and needs to be built into the project timeline before material is ordered or ground is broken.
Vaughan
3 ATB deck projects here- What moves the price here
- City of Vaughan Building Standards processes permits in 3–6 weeks — longer than some GTA municipalities — so submitting a complete package with accurate site plan and setbacks early is the best way to avoid schedule gaps.
Richmond Hill
2 ATB deck projects here- What moves the price here
- Poolside work, glass railing, and custom stairs always add detail time. That is normal on these jobs.
Common questions
How much does a deck cost in Toronto?
Most decks we build in Toronto and the GTA run $15,000 to $60,000 installed. Pressure-treated decks are about $45 to $65 per square foot and composite decks about $65 to $95 per square foot. Stairs, railing type, height and access move the final number.
Is a composite deck worth the extra cost?
On shaded, damp or busy decks it usually is. Composite costs more up front but needs no staining or sealing, so the gap closes over the years. On an open, sunny yard with a tight budget, pressure-treated is still a good choice.
Does the price include the permit?
When a deck needs a permit, we prepare the drawings and handle the application as part of the job. The written quote lists what is included, so there are no surprises later.
Why do deck quotes vary so much?
Usually because quotes are not for the same scope. Check that each one includes the same footings, stair runs, railing, tear-out and permit work. A low number often leaves one of those out.
Want a real number for your yard?
Send us the address and a few photos, or design your deck in 3D and send the plan. We reply with a site visit and a written quote.