In Montreal, a standard-quality deck renovation runs $10,230 to $23,715, prices below the Canadian average (index 93). A budget version starts around $7,162 and premium work reaches $37,944.
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| Line item | Range | Share |
|---|---|---|
| Structure & Foundation | $1,953 – $3,906 | 25 % |
| Decking Material | $1,628 – $3,255 | 21 % |
| Railings | $651 – $1,628 | 10 % |
| Stairs | $521 – $1,302 | 8 % |
| Lighting | $326 – $977 | 5 % |
| Pergola / Cover | $1,953 – $5,208 | 30 % |
| Permits | $130 – $326 | 2 % |
Included
Not included
| Line item | Range | Share |
|---|---|---|
| Structure & Foundation | $2,790 – $5,580 | 25 % |
| Decking Material | $2,325 – $4,650 | 21 % |
| Railings | $930 – $2,325 | 10 % |
| Stairs | $744 – $1,860 | 8 % |
| Lighting | $465 – $1,395 | 5 % |
| Pergola / Cover | $2,790 – $7,440 | 30 % |
| Permits | $186 – $465 | 2 % |
Included
Not included
| Line item | Range | Share |
|---|---|---|
| Structure & Foundation | $4,464 – $8,928 | 25 % |
| Decking Material | $3,720 – $7,440 | 21 % |
| Railings | $1,488 – $3,720 | 10 % |
| Stairs | $1,190 – $2,976 | 8 % |
| Lighting | $744 – $2,232 | 5 % |
| Pergola / Cover | $4,464 – $11,904 | 30 % |
| Permits | $298 – $744 | 2 % |
Included
Not included
In Montreal, Quebec, a standard-quality deck renovation typically costs between $10,230 and $23,715 in 2026 — prices are below the Canadian average, with a local cost index of 93%. Expect around 1 to 3 weeks of work and a 65–75% return on investment at resale. Footings must extend below the frost line (typically 4–5 ft) — skipping helical piles or pressure-treated sonotubes is the number one cause of premature deck failure.
Same job in Laval: $9,790 – $22,695 at standard quality, about 4 % cheaper than Montreal on our cost index.
Montréal decks are built for frost and snow: footings or helical piles go below the frost line, and the structure is sized for the snow load the code sets for the city, both of which a licensed contractor prices without being asked. The other constraint is the borough: railing height, setbacks and, on a plex, anything visible from the street can need a permit or a review, and the rules differ from one arrondissement to the next. Pressure-treated wood is the budget standard; composite is the premium tier.
Authority: Ville de Montréal, your borough’s permit counter
Guide: Renovating in Québec: licences, taxes, permits and programs (2026)
Deck projects offer excellent outdoor living value in Canadian summers but material choice dramatically affects longevity and maintenance. Pressure-treated wood is cheapest upfront ($15–25/sq ft installed) but requires annual staining. Composite decking ($30–55/sq ft) costs more but lasts 25–50 years with minimal maintenance. Plan for proper footings below the frost line — in most Canadian cities, that's 4–5 feet deep.
Material choice is the #1 cost driver: cedar ($25–40/sq ft), composite ($30–55/sq ft), or exotic hardwoods like Ipe ($50–80/sq ft). Railings add $50–120 per linear foot. Multi-level decks cost 50–75% more than single-level. Built-in features like benches, planters, and pergolas add $2,000–$10,000.
Pro tip
Build your deck in fall or early spring when contractors are less busy — you can often save 10–15% on labour and have it ready for summer use.
Montréal's renovation market is a plex market: duplexes and triplexes with shared walls, common elements and a syndicate when the building is a divided co-ownership. A large, bilingual pool of RBQ-licensed contractors serves it, and the cost index sits between Québec City and Toronto.
Cold winters, hot humid summers and repeated freeze-thaw: insulation, air sealing and materials rated for it matter more than in milder cities. Snow load is a design factor for roofs, and ice dams are common on older homes without proper attic ventilation.
In 2026, a deck renovation in Montreal costs between $7,162 (budget) and $37,944 (premium). The average standard cost ranges from $10,230 to $23,715.
The three most common options in Canada: a variable-rate HELOC against your home equity, a fixed-rate renovation loan from your bank (5–10 year terms), or a mortgage refinance if you have substantial equity. For projects under $15,000, a 0% balance-transfer credit card can bridge 12–18 months. Avoid contractor-offered financing — those rates often exceed 12%.
A standard deck renovation typically takes 1 to 3 weeks. Premium projects or surprises (structural issues, delivery delays) can extend it. Always get a written schedule from your contractor before signing.
For Montreal, the ideal window is late spring through early fall (May to September) for any work touching the building envelope. Book your contractor 4 to 8 weeks ahead during peak season — last-minute scheduling typically pushes the start date much further than an off-season project would suggest.
Always get three itemized quotes, check provincial licensing (RBQ in Quebec, HCRA in Ontario, equivalent elsewhere), and confirm general liability insurance. Read Google and HomeStars reviews, but weight direct references more heavily — call two past clients. Serious Montreal contractors typically have a 4–8 week backlog; be wary of anyone who can start tomorrow.
Complete guide
Read our complete national guide to deck costs