Deck Cost Montreal: Complete 2026 Price Guide
Building a deck in Montreal costs between $25 and $85 per square foot in 2026, with most homeowners spending $8,000 to $25,000 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: $25–$45/sqft — most affordable, lasts 15–20 years with annual staining
- Cedar: $40–$65/sqft — natural beauty, insect-resistant, lasts 20–25 years
- Composite (basic): $45–$65/sqft — low maintenance, 25–30 year lifespan
- Composite (premium, like Trex): $60–$85/sqft — best durability, fade-resistant
- PVC/Vinyl: $55–$75/sqft — fully synthetic, zero maintenance
Total Project Costs by Deck Size
- Small deck (120–200 sqft): $3,000–$12,000 — typical for a townhouse or small backyard
- Medium deck (200–400 sqft): $8,000–$25,000 — standard suburban deck with stairs
- Large deck (400–600 sqft): $15,000–$45,000 — multi-level, built-in seating
- Wrap-around or multi-level: $25,000–$60,000+ — custom design, multiple access points
Cost Breakdown: Where Your Money Goes
- Permits: $150–$500 (varies by Montreal borough)
- Design/plans: $500–$2,000 (if required by your borough)
- Excavation & footings: $1,500–$4,000 (frost-depth footings required in Quebec)
- Framing (joists, beams, posts): $2,000–$6,000
- Decking boards: $1,500–$8,000 (largest variable — material choice)
- Railings: $1,000–$5,000 (wood, aluminum, glass, or cable)
- Stairs: $500–$2,000 per flight
- Finishing (staining, sealing): $500–$1,500
- Labour: 40–60% of total project cost
Pressure-Treated Wood vs Composite vs Cedar: Full Comparison
- Pressure-Treated Wood: $25–$45/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: $40–$65/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: $45–$85/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 $1,000–$3,000 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 $500–$1,500 for demolition and disposal.
- Landscaping repair: Heavy equipment may damage your lawn — budget $300–$800 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 $150 to $500 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 $2,000–$4,000 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 $5,000–$13,000 depending on materials. Pressure-treated wood is the most affordable at $5,000–$9,000, while composite runs $9,000–$13,000.
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 $25–$45/sqft installed. However, it requires annual maintenance (staining/sealing) which adds $200–$500/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