Structure
- Footings below the 1.2 m frost line
- Ledger properly fastened and flashed
- Joist spacing to the span tables
- Permit drawings where height requires it
Deck builder in Markham and the GTA.
FOUR40 builds pressure-treated and composite decks across Markham, Richmond Hill, Aurora, Vaughan and Stouffville — footings below the 1.2 m frost line, framing to code, and permits handled where the deck height requires one. Free on-site estimates.
Based in
Whitchurch-Stouffville
Estimates
Free & on-site
Before we start
Written scope
On site
Same crew throughout
What's included
Under the boards is where a deck fails.
Same principle as the driveways: the visible surface is the easy part. Footing depth, ledger attachment and flashing are what decide whether it's solid in ten years.
Surface
- Pressure-treated or composite decking
- Hidden fasteners on composite
- Picture-frame borders and mitred edges
- Stairs, landings and privacy screens
Finishing
- Railings — wood, aluminum or glass
- Under-deck storage and skirting
- Low-voltage step and post lighting
- Deck-to-patio transitions
Our work
Decks we've built.
Pressure-treated framing, black aluminum pickets, stairs and landings — and a gazebo platform shown from the gravel pad up.
BeforeAfterDrag the handle — or use the arrow keys
Framing & footings
Reserved: footings below the frost line and joist layout on the next deck build.
Footings, framing and composite sets are going up here as those jobs finish — see the rest of our work in the gallery.
What it costs
What moves the number.
Typical range
Ask for a figure
We publish real numbers rather than "it depends" — but only once they're ours to publish. Our written ranges are being finalised; call and we'll give you one over the phone in a minute. What moves the number:
- Square footage and height off grade — height drives footings, stairs and railing length
- Decking material: pressure-treated, mid-tier composite or premium composite
- Railing choice — wood, aluminum picket or glass
- Ground conditions and access for the footing equipment
- Permit requirements in your municipality
- Stairs, landings, privacy screens, skirting and lighting
Working with us
Five steps, no surprises.
01
Site visit
We measure, check drainage and grade, and talk through what you actually want. Free, and no pressure to sign anything.
02
Written quote
Scope, materials, base depth and price in writing. You'll know exactly what's included before a shovel moves.
03
Schedule & locates
Ontario One Call locates booked, materials ordered, start date confirmed. A realistic window, not an optimistic one.
04
Build
Excavation, base, compaction, install. Site cleaned at the end of each day — you still have to live there.
05
Walkthrough
We walk it together before final payment. Anything on your list gets fixed, then we're back if settling shows up.
Questions
Decks, answered.
Do I need a permit for a deck in Ontario?
Generally yes once the walking surface is above roughly 600 mm from grade, and the exact threshold and setback rules vary by municipality — Markham, Richmond Hill, Vaughan and Whitchurch-Stouffville each publish their own. We confirm which applies to your build and factor the permit into the schedule rather than discovering it halfway through.
Composite or pressure-treated wood?
Pressure-treated costs meaningfully less up front and needs cleaning and staining every couple of years. Composite costs more to install and effectively nothing to maintain, holds colour, and doesn't splinter. Over a ten-year horizon they land closer together than most people expect — the honest question is whether you'd rather pay now or maintain later.
How deep do deck footings go?
Below the frost line — in this region that means roughly 1.2 m. Footings that stop short are the reason decks lift and rack after a hard winter, and it's the part nobody sees on a finished deck.
Can you repair or resurface an existing deck?
Often, yes. If the frame and footings are sound, re-boarding the surface and replacing railings costs far less than a rebuild. If the structure has moved or the posts are rotting at grade, we'll tell you that rather than boarding over it.
Service area
Across the GTA, based in Stouffville.
Close enough to come back if something needs attention — which matters more than it sounds.
MarkhamStouffvilleRichmond HillAuroraNewmarketVaughanUxbridgePickeringAjaxScarboroughNorth YorkKing City
Elsewhere in the GTA? Call and ask — we travel for the right project.
Related
Other things we build.
Free estimate
Get a deck quote.
Fill this in and we'll get back to you to book a site visit — usually the same day.
Or call directly(647) 473-3454