Pressure-treated, cedar, and composite decks for Markham homes — framed on frost-depth footings, built to code, with railings, stairs, and permits handled. Newer subdivision builds + heritage in Unionville.
A deck is a structure first and a floor second. Framed on footings poured below the frost line, it stays level, solid, and safe for decades; built on shallow blocks, it heaves the first hard winter. In Markham, where the ground runs to generally manageable, the footing detail is where a deck is really decided.
Five factors decide whether a deck in Markham stays solid for decades:
"A deck in Markham is won at the footings and the frame. The boards everyone touches are the last 20 percent — the structure underneath is the deck."
— Reliable Hardscapes, on Markham decksEvery major deck system: pressure-treated (the working-budget standard), cedar (warm, natural, premium wood), and composite/PVC (25–50 year board warranties, no staining), plus multi-level and pool decks that step down to patios and surrounds. Every build stands on frost-depth footings with code-compliant framing, railings, and stairs — and because we build hardscaping in-house, deck-to-patio combinations are designed as one scope.
Modern large-format pavers, monochromatic palettes, smart-home lighting integration. For decks specifically, that shapes the board, railing, and lighting selections we recommend.
Markham's soil character — generally manageable; older Unionville properties may have legacy issues — determines footing depth, bearing design, and drainage under the structure. We assess this on-site before quoting, because the ground decides whether the frame stays level.
Ontario's 40+ annual freeze-thaw cycles are the main long-term load on a deck — frost heave lifts shallow footings and racks frames. Footings poured below frost, ventilated framing, and boards rated for our climate exist precisely so Markham decks have nothing to heave on.
Full overview of every service we deliver in Markham — driveways, patios, pools, outdoor kitchens, and more.
Full breakdown of our deck service — materials, structure, railings, permits, and warranty.
Grade-level patios that pair with decks for the best-performing backyard layouts.
Surrounds and decks designed for pools — materials, drainage, and safety in one scope.
A sample of the kind of deck installation work we deliver across Markham:
Newer subdivision builds + heritage in Unionville. That drives access planning, machine selection, and how we stage materials on site.
In most GTA municipalities, a permit is required when a deck attaches to the house or its surface sits more than 24 inches (60 cm) above grade — and those decks also need code-compliant guardrails. Where a permit applies in Markham, timelines typically run 4–6 weeks; subdivision review in some areas. We prepare the drawings and handle the permit and inspections as part of the project.
Framing lumber arrives by the lift and footings need machine access — every Markham deck carries its own delivery and access profile. We plan staging, protection for existing surfaces, and access before the first hole is dug.
Markham's residential character — polished contemporary, refined family homes, smart-home integrated — sets the bar for what a deck should look like here. We match boards, railings, and lighting to the house, not a catalogue.
Frost-depth footings, a code-compliant frame, and dry, ventilated framing decide whether a deck stays solid for decades. These are exactly the corners cut on the bouncy, heaved decks we are called to replace.
Most decks take 1 to 2 weeks on site, with permit lead time before that where it applies. With Markham approval windows of 4–6 weeks; subdivision review in some areas, the best time to plan a spring deck is the winter before.
In Markham, pressure-treated decks typically run 45 to 70 dollars per square foot installed, cedar 60 to 90 dollars, and composite or PVC 80 to 130 dollars. Railings, stairs, multiple levels, and built-ins are the biggest cost drivers beyond the boards themselves. A typical 300 square foot pressure-treated deck lands around 15,000 to 20,000 dollars, while a composite deck of the same size with glass railings can reach 30,000 to 40,000 dollars.
In most GTA municipalities, a building permit is required when the deck is attached to the house or when its surface sits more than 24 inches (60 cm) above grade. Decks above that height also need code-compliant guardrails. Low, freestanding platform decks usually do not need a permit. Where a permit applies, Markham timelines typically run 4–6 weeks; subdivision review in some areas — we confirm the rules, prepare the drawings, and handle the permit and inspections as part of the project.
It depends on how you weigh upfront cost against maintenance. Composite costs roughly twice what pressure-treated wood does, but it never needs staining or sealing, just an occasional wash, and most boards carry 25 to 50 year warranties. Wood is cheaper on day one but needs cleaning and re-staining every couple of years to stay looking good. Over 10 to 15 years the total costs get surprisingly close, which is why many Markham homeowners who plan to stay in their home choose composite.
Most residential decks take 1 to 2 weeks of on-site work, depending on size, levels, railings, and built-ins. Larger multi-level or pool deck projects can run 2 to 3 weeks. Newer subdivision builds + heritage in Unionville. That shapes access and staging. If a permit is required, allow additional lead time for drawings and municipal approval before construction starts — we give you a confirmed schedule in writing.
Yes, and it is one of the best-performing backyard layouts we build. The deck sits at your walkout door height, giving you a level dining and barbecue area off the kitchen, then steps down to an interlocking stone patio at grade for lounging and fire features. Because we build both decks and hardscaping in-house, the levels, materials, and drainage are designed together instead of bolted on separately.
Free on-site consultation across Markham. We'll walk the yard, talk through levels, materials, and railings, and give you an honest read on structure, permits, and cost.
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“Very satisfied with their communication, attention to detail and quality of workmanship. A job well done.”
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“The team exceeded my expectations with a gorgeous patio. Polite, dependable, and productive.”
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“Every one of the boys was absolutely amazing to work with. I highly recommend them.”
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