Guides & Resources | Deck Costs, Permits & Design

Budgeting

How Much Does a Deck Cost in Ontario?

The honest answer: a deck isn’t priced by the square foot alone. Two decks of the same size can differ by tens of thousands of dollars once height, structure, materials, and finishes are accounted for. What you’re really paying for is the engineering underneath and the craftsmanship on top.

As a general guide, here is where our own outdoor living builds typically start:

Package	Starting	Premium Finish
The Essential	$43,000	$63,000
The Retreat	$47,500	$62,800
The Signature	$56,200	$72,000
The Gathering	$82,300	$104,600
The Estate	$107,000	$138,000

What actually drives the cost

Size & height. A ground-level deck is far simpler than a raised or second-storey walkout, which needs taller posts, more footings, and often engineered beams and guards.
Materials. Pressure-treated lumber, cedar, and composite decking sit at very different price points — and so do railings, from wood to aluminum to glass.
Foundations & engineering. Footings, sonotubes or helical piles, and stamped drawings when the structure requires them.
Features. Integrated lighting, privacy walls, under-deck living space, outdoor kitchens, and stamped-concrete patios all add scope.
Permits & site conditions. Permit fees, grading, and access can all move the number.

Why the cheapest quote can be the most expensive. A low bid often means an undersized structure, no design, and change orders once work begins. We price from a documented, fixed scope — so the number you approve is the number you build.

Regulation

Do You Need a Permit for a Deck in Ontario?

In most cases, yes. Under the Ontario Building Code, a building permit is generally required when a deck is more than 24 inches (600 mm) above grade, when it is attached to the house, or when it supports a roof or structure above. Exact thresholds — including area limits — vary by municipality, so the only reliable answer is the one confirmed with your local building department.

Why it matters

A permit isn’t red tape for its own sake. It confirms your deck is structurally sound, properly footed below the frost line, and safe to use — and it protects you at resale, when unpermitted structures can stall or sink a sale.

How the process works

1.Drawings — a site plan, structural details, and elevations are prepared.
2.Application — submitted to the municipality with the required fees.
3.Review & issuance — the building department reviews for code compliance.
4.Inspections — footings and framing are inspected at set stages during construction.

We handle all of it. HWM prepares the construction drawings, obtains and manages permits, and schedules inspections — so you don’t have to navigate the municipality yourself.

This is general information, not legal advice. Requirements differ between municipalities; we confirm exactly what your specific project needs before work begins.

Philosophy

Why Design Before You Build?

Most project regret comes from decisions made on assumptions. You approve a price, work starts, and only then do the questions appear — how does this actually look, where does the sun hit, is there room for the table? By then, changes are expensive.

Designing first flips that. Before a single board is cut, you see photorealistic renderings and a documented scope, so every choice is made with confidence rather than hope. It is the difference between “what size deck would you like?” and “how do you want to live in this space?”

What you gain

Fewer change orders. Conflicts are caught on screen, not mid-build.
Accurate budgeting. A documented scope means a price you can trust.
Aligned expectations. Everyone builds from the same drawings.
Permit-ready documentation. The same drawings move your permit forward.

It’s the backbone of how we work: Discover → Concept → Visualize → Document → Build → Deliver. See it come to life on our 3D Design page.

Plan Your Project With Confidence