Deck Building Cost in Ottawa (2026)
Average cost in Ottawa
$8,500 — $75,000
$35 — $130 per sq ft
Cost Breakdown
ItemizedDecking boards, framing, and fasteners
45%
Installation, framing, and finishing
40%
Grading and old deck removal
10%
City fees and structural drawings
5%
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 12 sources and market data for Ottawa. Actual costs may vary depending on specific project requirements.
📈Price Momentum
Year-over-year~1 year ago
$23,795
Today
$24,937
Deck Building in Ottawa is ↑ 4.8% compared to roughly a year ago — about $1,142 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 24 inches (600mm) above grade, attached to the house, or exceeds 108 square feet in size.
Permit fees typically range from $200 to $500, calculated at approximately $12.75 per $1,000 of construction value, with a minimum fee of $117.
Pressure-treated wood costs $35–$45 per sq ft installed, while low-maintenance composite (like Trex) ranges from $55 to $85+ per sq ft installed.
Most standard 200–400 sq ft decks in Ottawa take 1 to 3 weeks to build, depending on weather and the complexity of features like glass railings or multi-level designs.
📊Our Methodology
How we collect dataAggregated from 12+ 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: 2 weeks 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.