Deck Building Cost in Ottawa (2026)
Average cost in Ottawa
$8,500 — $55,000
$35 — $135 per sq ft
Cost Breakdown
ItemizedProfessional installation and framing
45%
Decking boards, fasteners, and joists
42%
Excavation, footings, and debris removal
9%
City fees and structural drawings
4%
HST at 13%
📋What's Included
ScopeTypically Includes
- Pressure-treated lumber
- Concrete footings
- Railing system
- Stairs (1 set)
- Hardware & fasteners
- Labor
Typically Excludes
- Composite or hardwood decking
- Built-in seating or planters
- Pergola or roof
- Lighting
- Permits
Based on a standard 200 sq ft pressure-treated wood deck.
🧮Estimate Your Cost
InteractiveEstimated Cost
$6,240 — $9,360
Based on 9 sources and market data for Ottawa. Actual costs may vary depending on specific project requirements.
📈Price Momentum
Year-over-year~1 year ago
$20,710
Today
$21,290
Deck Building in Ottawa is ↑ 2.8% compared to roughly a year ago — about $580 more on the average project.
Comparison derived from the year-over-year change rate, not a month-by-month price index. We don't store historical snapshots yet — when we do, this will become a real time series.
🏢Top Deck Build Contractors in Ottawa
Verified providersProvider data sourced from public business directories. Ratings and reviews are public and may change. LookupCost is not affiliated with listed providers.
💬What People Actually Paid
Community❓Common Questions
Yes, a permit is required if the deck is more than 60 cm (24 inches) above grade, attached to the house, or exceeds 10 square meters (108 sq ft) in area.
As of January 1, 2026, the City of Ottawa charges $12.75 per $1,000 of construction value, with a minimum application fee of $117.
Pressure-treated wood decks typically cost $35–$60 per sq ft installed, while premium low-maintenance composite decks (like Trex or TimberTech) range from $70–$135 per sq ft.
To account for Ottawa's severe freeze-thaw cycles, footings must be installed at a minimum depth of 48 inches (1.2 meters) to reach below the frost line and prevent heaving.
📊Our Methodology
How we collect dataAggregated from 10+ verified web sources and cost databases
Licensed contractor estimates and regional cost guides
Government construction and labor statistics
Community-reported project costs and reviews
Last data collection: 4 days ago. Updates run weekly. All costs in CAD.
About this data
Cost figures are estimates synthesized from public market data using AI research and refreshed regularly. Real project costs vary by scope, materials, contractor, and site conditions. Always get verified quotes from licensed contractors for your specific project.
Spotted bad data? Let us know — we'll review and update.