The short answer
Most of the decks we build in Hamilton land in the low five figures. A small, straightforward pressure-treated deck costs less than a large multi-level composite build. That range is wide because the variables are real, not because contractors are being cagey. Anyone who quotes you a price over the phone without seeing the yard is guessing.
What actually drives the price
1. Size and layout
Square footage is the biggest lever. A simple rectangle costs less per square foot than a multi-level design with angles, because every corner is labor.
2. Materials
Pressure-treated wood costs less up front and can be refinished for years. Composite costs more but barely asks anything of you afterward. The gap between the two is real, and it's the second-biggest driver after size.
3. Footings and foundation
Hamilton soil and frost lines mean footings matter. Helical piles versus concrete, depth, count: this is the part of the quote you never see but absolutely pay for, one way or another.
4. Railings and stairs
Railings run the length of every open edge, and stairs are skilled carpentry. A deck with 40 feet of railing and two staircases is a different project than the same deck with 10 feet of railing.
5. Extras and access
Lighting, skirting, privacy screens, pergolas. And access: a walkout backyard is cheaper to build in than one where every board comes through the house.
The quotes that lie to you
Here's the thing nobody tells you: the cheapest quote usually isn't cheaper. It just moved the cost somewhere you can't see: shallower footings, lighter framing, no flashing at the ledger. When you're comparing quotes, compare the scope line by line, not just the totals. Ask what's in the footings. Ask about the ledger board. The answers tell you everything.
How to get your real number
You have two honest options. First, our free Design Your Deck tool: draw your deck, pick your materials, and get a ballpark in about 60 seconds. It's the same pricing logic we quote from, so the number you see is the neighborhood of the number we'd give you in person.
Second, a free in-person estimate. We come out, measure, talk through materials, and give you one written price. No pressure, no obligation, no per-line-item games.