Deck Building Cost in Montreal (2026)
Average cost in Montreal
$5,500 — $38,000
$35 — $135 per sq ft
Cost Breakdown
ItemizedProfessional installation and framing
48%
Decking boards, railings, and hardware
42%
Helical piles or concrete footings
8%
Municipal fees and architectural plans
2%
GST+QST at 14.98%
📋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
$5,792 — $8,688
Based on 11 sources and market data for Montreal. Actual costs may vary depending on specific project requirements.
📈Price Momentum
Year-over-year~1 year ago
$17,011
Today
$17,861
Deck Building in Montreal is ↑ 5.0% compared to roughly a year ago — about $851 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 Montreal
Verified providersGroupe Ubora - Sunroom & Deck Builders
19100 Route Transcanadienne, Baie-d'Urfé, QC H9X 3S4, Canada
205 reviews
Florida Deck and Landscaping
3551 Bd Saint-Charles #309, Kirkland, QC H9H 4S3, Canada
82 reviews
Bonbois MTL Inc. - Construction, Terrasse, Patio, Pergolas, Clôtures Montréal
2186 Rue Nicolet, Montréal, QC H1W 3L2, Canada
59 reviews
Provider 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 for any deck that is attached to the house or exceeds 24 inches (60 cm) above ground level. In 2026, the minimum residential permit fee in Montreal is $167.40.
Montreal calculates permit fees at a rate of $9.80 for every $1,000 of estimated project value. For a typical $15,000 deck, the permit would cost approximately $167.40 (meeting the minimum threshold).
Yes, in Quebec, all contractors must hold a valid license from the Régie du bâtiment du Québec (RBQ). Hiring an unlicensed contractor can result in fines and voids most home insurance policies.
Due to the frost line in Quebec, footings must typically reach a depth of 4.5 to 5 feet (1.4 to 1.5 meters) to prevent shifting during freeze-thaw cycles. Many Montreal contractors now use helical piles, which cost between $200 and $350 per pile installed.
Pressure-treated wood remains the budget choice at $35-$55 per sq ft installed, while mid-to-high-end composite (like Trex or TimberTech) ranges from $85 to $135 per sq ft due to higher material costs and specialized hidden fastener systems.
📊Our Methodology
How we collect dataAggregated from 5+ 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.