Deck Cost Montreal: Complete 2026 Price Guide
Building a deck in Montreal costs between 5 and 5 per square foot in 2026, with most homeowners spending ,000 to 5,000 for a standard 200-400 sqft deck. The final price depends on three main factors: material choice, deck size and complexity, and whether your borough requires permits. This guide breaks down every cost so you can budget accurately.
Deck Cost by Material (Per Square Foot)
- Pressure-treated wood: 5–5/sqft — most affordable, lasts 15–20 years with annual staining
- Cedar: 0–5/sqft — natural beauty, insect-resistant, lasts 20–25 years
- Composite (basic): 5–5/sqft — low maintenance, 25–30 year lifespan
- Composite (premium, like Trex): 0–5/sqft — best durability, fade-resistant
- PVC/Vinyl: 5–5/sqft — fully synthetic, zero maintenance
Total Project Costs by Deck Size
- Small deck (120–200 sqft): ,000–2,000 — typical for a townhouse or small backyard
- Medium deck (200–400 sqft): ,000–5,000 — standard suburban deck with stairs
- Large deck (400–600 sqft): 5,000–5,000 — multi-level, built-in seating
- Wrap-around or multi-level: 5,000–0,000+ — custom design, multiple access points
Cost Breakdown: Where Your Money Goes
- Permits: 50–00 (varies by Montreal borough)
- Design/plans: 00–,000 (if required by your borough)
- Excavation & footings: ,500–,000 (frost-depth footings required in Quebec)
- Framing (joists, beams, posts): ,000–,000
- Decking boards: ,500–,000 (largest variable — material choice)
- Railings: ,000–,000 (wood, aluminum, glass, or cable)
- Stairs: 00–,000 per flight
- Finishing (staining, sealing): 00–,500
- Labour: 40–60% of total project cost
Pressure-Treated Wood vs Composite vs Cedar: Full Comparison
- Pressure-Treated Wood: 5–5/sqft installed. Pros: lowest upfront cost, widely available. Cons: requires annual staining/sealing, can warp or crack in Montreal’s freeze-thaw cycles, splinters over time. Best for: budget-conscious homeowners who don’t mind yearly maintenance.
- Cedar: 0–5/sqft installed. Pros: natural insect and rot resistance, beautiful grain, lighter weight. Cons: softer wood (dents easily), needs sealing every 1–2 years, premium cost. Best for: homeowners who want natural wood beauty with less maintenance than pressure-treated.
- Composite: 5–5/sqft installed. Pros: zero sanding/staining, resists fading and scratching, no splinters, 25–30 year warranty. Cons: higher upfront cost, can get hot in direct sun, limited colour change after installation. Best for: long-term homeowners who want a maintenance-free deck that handles Montreal winters.
Hidden Costs Montreal Homeowners Should Know
- Frost-depth footings: Quebec building code requires footings to extend below the frost line (minimum 4.5 feet). This adds ,000–,000 vs. shallow footings used in warmer climates.
- Clay soil excavation: Much of Montreal sits on clay, which is harder to excavate and may require additional gravel backfill for drainage — add 10–15% to excavation costs.
- Borough-specific permit requirements: Some boroughs (Outremont, Westmount) have stricter heritage or aesthetic requirements that may limit material choices or require architectural drawings.
- Demolition of old deck: If replacing an existing deck, budget 00–,500 for demolition and disposal.
- Landscaping repair: Heavy equipment may damage your lawn — budget 00–00 for sod repair or reseeding.
Deck Permit Requirements in Montreal
Most decks in Montreal require a permit from your borough. Here’s what triggers a permit:
- Deck is attached to the house
- Deck is more than 2 feet above ground
- Deck is over 200 square feet
- Deck is in a front yard or visible from the street
- Heritage property or designated area
Permit costs range from 50 to 00 depending on your borough and project value. Processing takes 2–4 weeks. Nael Construction handles the entire permit process for you.
How to Save on Deck Costs Without Sacrificing Quality
- Build in off-season (October–March): Some contractors offer 5–10% discounts during slower months
- Choose a simple rectangular design: Angles, curves, and multi-level designs add 20–40% to labour costs
- Use pressure-treated wood for structure, composite for decking: Save ,000–,000 vs. all-composite
- Standard height (under 2 feet): Avoids permit requirements in some boroughs and reduces railing costs
- Bundle with other work: If you’re already doing landscaping or fencing, bundling can save 10–15% on mobilization costs
FAQ: Deck Building Costs in Montreal
How much does a 200 sqft deck cost in Montreal?
A 200 sqft deck in Montreal costs ,000–3,000 depending on materials. Pressure-treated wood is the most affordable at ,000–,000, while composite runs ,000–3,000.
Do I need a permit for a deck in Montreal?
Yes, most decks require a permit from your borough. Decks over 2 feet high, attached to the house, or over 200 sqft typically need permits. Check with your specific borough.
What’s the cheapest deck material?
Pressure-treated wood is the cheapest at 5–5/sqft installed. However, it requires annual maintenance (staining/sealing) which adds 00–00/year over its 15–20 year lifespan.
How long does a deck last in Montreal’s climate?
Pressure-treated wood: 15–20 years with maintenance. Cedar: 20–25 years. Composite: 25–30 years. Montreal’s freeze-thaw cycles shorten wood deck lifespan by 3–5 years vs. milder climates.
When is the best time to build a deck in Montreal?
May through October is the construction season. Book early (February–March) to secure a spot — reputable contractors fill their summer schedules by April. Off-season builds (November–March) are possible but may face weather delays.
Get a Free Deck Estimate
Nael Construction is an RBQ-licensed general contractor serving Montreal, Laval, Longueuil, Brossard, and the West Island since 2015. We handle everything from permits to final inspection. Contact us for a free, no-obligation estimate on your deck project.
Related: Montreal Deck Builder Guide: Costs, Permits & Materials | Residential Renovation Services | Outdoor Works: Fencing, Landscaping & More
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Nael Construction dessert Montréal (Verdun, Plateau, Laval) et la Rive-Sud : 1240 Montée de Liesse, Saint-Laurent, QC H4S 1J4 | 514-781-7283 | info@nael.ca.