An honest interactive estimate for a residential deck in the Hamilton, Halton and Niagara regions of Ontario. Slide the inputs to see your real cost range, with footings, railings, stairs and demolition factored in. No email gate, no fake low-ball number, just the same math our crew uses when we walk a backyard.
A typical Hamilton backyard deck runs 180 to 320 sqft. A 12×16 is 192 sqft, a 16×20 is 320 sqft.
PT is the cheapest, composite and PVC are the most popular in Burlington and Oakville, exotic hardwood (ipe, garapa) is the premium tier.
Walkout decks off a raised back door need taller posts, more bracing and guard railings, which adds roughly 40 percent to the build.
Most Hamilton and Halton permits require frost-depth footings. Helical piles install in a day with no curing time and pass inspection cleanly.
Any deck more than 24 inches off grade needs a code-compliant guard. Aluminum is the sweet spot, glass is the showpiece upgrade.
A single stair run to grade with stringers, treads and a code guard adds a real chunk to the budget.
Tear-out, dumpster and disposal of old PT lumber. Skip this if you have a clean slate.
Estimated cost: $0 to $0
What this calculator includes
The number you see covers the full turnkey deck as our crew would build it. That means the base structure (beams, joists, ledger or freestanding frame, blocking and fasteners), the decking surface in your chosen material, footings sized to your soil and frost depth, a code-compliant guard railing where required, optional stair set, and optional demolition and disposal of the old deck. Permit drawings and the City of Hamilton, Burlington or Oakville building permit handling is baked into our standard quote, so it is reflected in this range.
What the calculator does not include: gas line extensions for a BBQ, low-voltage deck lighting, a pergola or shade structure on top, hot tub framing reinforcement, privacy screens, built-in benches or planters, and any landscape work around the deck (grading, plantings, pathway from the deck to the yard). Those are real costs we quote separately so the line items stay honest.
What the numbers are based on
The ranges are pulled straight from the Peace Love Landscaping 2026 estimating book and cross-checked against our companion 2026 Ontario deck cost guide. Every input has a real, sourced range behind it.
Decking material per square foot, installed: pressure-treated $30 to $55, western red cedar $45 to $75, composite (Trex, TimberTech, Fiberon) $60 to $110, PVC (AZEK, Wolf) $70 to $120, exotic hardwood (ipe, garapa, mahogany) $80 to $140. These are all-in numbers covering decking boards, fasteners, framing, and labour, not just the board price at the lumberyard.
Height multiplier: ground-level decks come in around 15 percent cheaper because there is less framing and often no guard railing. Walkout decks at 6 feet or more cost roughly 40 percent more once you factor in taller posts, beefier beams, knee bracing, and the mandatory guard.
Footings: surface blocks are free in the model because they only work for ground-level platforms that do not need a permit. Sonotube concrete piers run about $400 per footing once you include digging, tube, rebar, concrete, and inspection. Helical screw piles run about $500 per footing installed by a certified crew, but they pass frost-depth inspection same-day and leave your lawn intact.
Railing per linear foot, installed: wood or PT $65, aluminum picket $115, glass panel $275. The calculator estimates perimeter from your deck size, then adds a 10 percent buffer for posts, returns and gate sections.
Stairs and demolition: a single stair run lands between $600 and $2,200 depending on height and material. Tear-out and disposal of an old PT deck runs $4 to $9 per square foot.
Regional notes
Pricing across our service area is tighter than people expect, but there are a few real differences. Hamilton Mountain, Stoney Creek and Ancaster sit on the lower end of the range. Lots are flatter, access is easy, and the builds are usually mid-height. Burlington lakeshore and Oakville south of the QEW trend toward the higher end because the homes are bigger, the design briefs lean composite and PVC with aluminum or glass railings, and finish standards are unforgiving.
Niagara escarpment lots (Grimsby, Beamsville, Dundas, parts of Ancaster) often need helical piles because of shallow soil over rock, which pushes footing costs to the top of the range. Walkout decks on raised bungalows in Waterdown and west Hamilton add the height multiplier almost every time. If your lot is steep, expect the high end of the calculator range to be the realistic number.
Frequently asked questions
How accurate is this estimate?
Within roughly 15 percent of our final written quote on the vast majority of jobs. The calculator uses the same per-square-foot ranges, footing pricing and railing math our crew uses on a site walk. The variables it cannot see are access (can we get a skid steer in?), soil conditions, and any custom design features. For a firm number, book a free site visit.
What permits do I need for a deck in Hamilton or Halton?
Any deck more than 24 inches above grade, or attached to the house, needs a building permit in Hamilton, Burlington, Oakville and across Halton Region. Ground-level freestanding decks under 24 inches usually do not. Our standard quote includes permit drawings, application and the inspection coordination, so it is baked into the calculator range.
Does this include a hot tub deck?
No. Hot tubs need reinforced framing (doubled joists, extra footings, sometimes a dropped frame so the tub sits flush) and that is a separate line item. If you are planning a hot tub, mention it on your quote request and we will size the structure properly from day one.
How much does composite cost vs pressure-treated in real life?
For a typical 250 sqft mid-height deck in Burlington, expect roughly $9,000 to $14,000 in PT and $17,000 to $28,000 in composite, both with aluminum railing and helical piles. Composite costs about twice as much up front, but it saves the staining and board-replacement cycle that PT needs every 2 to 3 years.
Why is a helical pile pricier than a concrete pier?
The pile itself, the certified install crew, and the engineered load certificate. The trade-off is a one-day install with no curing, no big spoil pile on your lawn, and a stamped inspection report that sails through plan review. On escarpment lots with shallow soil it is often the only option that works.
Can I save money by sourcing my own materials?
Honestly, not much. We buy framing lumber, composite and railing at trade pricing that is usually lower than what you would pay retail, and we warranty the install end-to-end. Where homeowners do save is by simplifying the design: a clean rectangle with one stair run is dramatically cheaper than an L-shape with multiple levels and built-in benches.
- 2026 Ontario deck cost guide
- Deck vs patio comparison
- Our deck building service
- How to read a landscape quote
Not sure which material? Compare the trade-offs: PT vs cedar vs composite decking.