With Confidence
Not Guesswork. Adjust size, material, and features and see a realistic price range update in real time. No email. No pressure. Just an honest starting point from a team that builds what it prices.
Quick deck estimate
Answer a few questions — get a ballpark in seconds.
Why We Built an Estimator That’s Actually Accurate
Most online deck calculators are lead-generation tools. They show a low number to get your contact information, and the real price arrives later, usually much later, after time spent on calls and site visits with a contractor whose number was never real. We don’t work that way.
This estimator is drawn from the same pricing our team uses when we write a formal proposal. When you change the deck size, swap the material, or add a stair run, the number you see reflects a genuine change in how we would actually build and price that project. We have built decks across the GTA, through Caledon, Simcoe County, and up into Muskoka for decades. We know what things cost, and this tool makes that knowledge available before you ever pick up the phone.
What the Range Means
We show a range rather than a single figure because site conditions vary in ways a web tool can’t see. Grade, soil, access, and your municipality’s specific requirements all move the number. The range is honest: the low end is achievable on a straightforward site, and the high end reflects real contingencies, not padding.
Design Should Drive Budget, Not Surprise It
One of the most useful things we can do early in the process is show how design choices affect cost. A deck that’s 14×22 is not simply bigger than a 12×20. It may cross a structural threshold that changes the beam schedule, the footing layout, or the permit requirements. A small change in dimension can produce a disproportionate change in cost.
The estimator lets you explore those inflection points. That’s the point: not to give you a number to hold us to, but to give you a tool for making better design decisions before we meet.
What Every Price Assumes
Helical Footings
Every deck we build sits on helical screw piles. They’re torque-rated, engineer-inspectable, and immune to the frost heave that undermines concrete tube forms in Ontario’s climate. We don’t offer concrete piers as an alternative. Helicals are how a permanent deck is properly founded here, and the cost is in the square-foot rate from the start.
Joist Protection Throughout
Joist tape protects your framing from the water that collects at every fastener and board gap. On a PVC deck we tape every joist, not just the beams. It adds cost. It’s not optional. It’s the difference between framing that lasts twenty years and framing that starts failing in ten.
PVC Deck Framing
PVC decking has more movement than wood. The framing schedule reflects this:
- 2×10 joists on 12-inch centres throughout
- Short-spanned triple 2×10 beams
- Helicals spaced under 8 feet along the beam
- All cut ends and blocks sealed with high-VOC paint
- Joist tape on every framing member, not just beams
Pressure Treated Framing
PT lumber tolerates longer spans, which means the footing layout is less intensive. The structural logic is different, but the quality standard is the same:
- Wider bay spacing along the beam than PVC
- Beams clad with joist protection standard
- ACQ-rated hardware throughout
- Helical footings at all support points
- Code-compliant ledger attachment
Materials We Work With
Pressure treated lumber, PVC decking, and cedar. We don’t work with composite decking. Our experience and warranty confidence is built around materials we’ve used on thousands of projects. We’d rather do fewer things exceptionally well.
Permit Allowance
A permit allowance is built into every estimate and reconciled on the formal proposal. We handle permit submissions as part of our process. It’s not something we hand off to clients.
A Note on Railings
Railings are the most common area where clients want more options than the estimator offers. The reason is straightforward: in Ontario, every railing system installed on a permitted deck must carry CCMC approval from the Canadian Construction Materials Centre. Approval is product-specific. Only a small number of systems currently hold it. That’s what the estimator prices.
Custom wood or aluminum railings are possible, but they require structural detailing, a design package, and a project-specific engineering stamp. In Canada, that engineering doesn’t transfer between projects. Each custom railing needs its own engineer. For the right project, that cost is worth it. If you have something specific in mind, the site visit is the right place to discuss it.
Our Process, from Estimator to Built
The estimator is the first step in the GardenStructure process, not a shortcut around it. Once you have a sense of what your project might cost, the path typically looks like this:
- A site visit to discuss your project in context, grade, views, access, and how you’ll use the space
- A design retainer to develop floor plan layouts and explore options
- 3D renderings so you can see the finished project before anything is built
- Permit drawings once the design is locked in
- A formal proposal once we know exactly what we’re building
We don’t issue formal proposals before the design is pinned. Doing so is a disservice to both parties. The estimator gets you ready for that first conversation.
The board itself costs more, but that is only part of the story. PVC requires 2×10 joists on 12-inch centres, short-spanned beams, helicals spaced more closely along the beam, sealed cut ends, and joist tape on every framing member.
The tradeoff is a deck that won’t rot, splinter, or need refinishing. For most families the math works in their favour over a ten-year window once maintenance costs are factored in.
Concrete tube forms rely on bearing down into undisturbed soil. When frost gets under them, they lift. Helicals screw past the frost line and mechanically anchor into stable soil. They don’t heave.
Helicals are also torque-rated and engineer-inspectable, so you know exactly what load capacity you have. We don’t offer concrete piers because we don’t believe they’re the right foundation for a permanent structure in this climate.
In Ontario, a permit is required for any attached deck and most freestanding decks above the code-prescribed height. For most projects the answer is yes. We handle permit submissions as part of our standard process. A permit allowance is included in every estimate and reconciled on the formal proposal.
We work with pressure treated, PVC, and cedar. These are materials we have built thousands of square feet with and can stand behind with confidence. Composite products vary significantly by manufacturer, and their long-term performance in Canadian climates is more variable than the marketing suggests. If composite matters to your project, we’re happy to discuss it at the site visit.
The plus-or-minus 15% range is honest. It reflects genuine site variability, not uncertainty on our end. For a straightforward accessible site with normal soil, most projects land comfortably within that range. What moves an estimate are steep grades, difficult access, rock, fill, high water table, or unusual municipal requirements. Those are identified at the site visit and reflected in the formal proposal.
The estimator calibrates your wish list against a realistic budget. From there, a site visit lets us discuss your project in context. For anything beyond a straightforward deck replacement, we move through a design retainer covering layouts, 3D renderings, and permit drawings once the design is locked in. We don’t issue formal proposals before the design is pinned.
Deck Cost in Toronto
Deck cost in Toronto typically runs higher than surrounding areas due to permit complexity and access constraints on smaller urban lots. Our estimator reflects GTA pricing directly — what you see is what we quote.
Deck Cost in Mississauga and Oakville
Deck cost in Mississauga and Oakville is broadly similar to Toronto, with slightly more room to work on larger suburban lots. We’ve built extensively through both cities and know the local permit offices well.
Deck Cost in Barrie
Deck cost in Barrie benefits from our permanent office presence at 705-717-2970. We build year-round in Barrie and across Simcoe County and carry no travel premium for projects in the area.
Deck Cost in Collingwood
Deck cost in Collingwood and the Blue Mountains area reflects the same square-foot rates you see in this estimator. Many of our Collingwood clients are building on sloped lots — the height surcharge in the tool accounts for that.
Deck Cost in Muskoka
Deck cost in Muskoka varies with site access and waterfront conditions. We work throughout the Muskoka region and are happy to discuss travel and site-specific factors at the consultation stage.
To see more decks and designs, please visit our other Deck Portfolio at Designers Decks Barrie
