Montreal, QC · Q3 2026
Deck renovation cost in Montreal
Footings, framing, railings, and permit thresholds. The figures below are modelled for Montreal, QC using our 0.98× regional cost multiplier, on a detached home built 1960-1989 at a mid-range finish.
Typical planning budget
$10,050 to $16,200
Typical $12,100 · includes 17% contingency
Why Montreal differs
Montreal prices about 2% below Ottawa, which is the baseline our regional model is anchored to.
- Regional multiplier
- 0.98×
- Versus Ottawa
- -2%
- Province
- Quebec
- Sales tax on services
- GST + QST (14.975%)
Regional multipliers are anchored to Ottawa at 1.00 and scaled using Statistics Canada's Residential Renovation Price Index and Building Construction Price Index movements by census metropolitan area, then cross-checked against published contractor rate ranges. They are planning-level adjustments, not surveyed local quotes.
Areas this covers
Montreal, QC is modelled as a single labour market, so these municipalities share the same cost multiplier:
- Montréal
- Laval
- Longueuil
- Brossard
Somewhere else in Quebec? Compare every Quebec region.
Cost by finish level in Montreal
Finish level moves the number more than almost anything else you control. All three rows use the same Montreal multiplier and the same scope.
| Finish | Low | Typical | High |
|---|---|---|---|
| BudgetStock materials, simple details, value fixtures | $7,600 | $9,200 | $12,350 |
| Mid-rangeCommon homeowner choice: durable materials, better fixtures | $10,050 | $12,100 | $16,200 |
| PremiumHigh-end materials, custom detailing, designer fixtures | $14,100 | $16,950 | $22,700 |
Where the money goes
The $12,100 typical figure for Montreal, broken into the lines a contractor quote should also separate.
| Category | Low | Typical | High |
|---|---|---|---|
| Materials | $3,350 | $4,050 | $5,400 |
| Labour | $4,050 | $4,850 | $6,500 |
| Demolition and disposal | $0 | $0 | $0 |
| Permit and design allowance | $1,200 | $1,450 | $1,950 |
| Subtotal | $8,600 | $10,350 | $13,850 |
| Contingency (17%) | $1,450 | $1,750 | $2,350 |
| Total planning budget | $10,050 | $12,100 | $16,200 |
Compared with the rest of Quebec
Same project, same scope and finish, priced against every other Quebec region we model.
| Region | Multiplier | Typical | vs Montreal |
|---|---|---|---|
| Montreal (this page) | 0.98× | $12,100 | — |
| Quebec City | 0.93× | $11,500 | -5% |
| Other Quebec | 0.91× | $11,250 | -7% |
Permits in Quebec
Renovation permits are issued by your municipality or borough. Quebec also applies the Construction Code province-wide.
Commonly triggered by this project
- Deck construction. Decks above a certain height or area normally require a permit, and footings may need inspection.
Hiring in Quebec
Quebec is the strictest province: every construction and renovation contractor must hold a valid Régie du bâtiment du Québec (RBQ) licence. Hiring an unlicensed contractor is illegal.
Trades that must be certified
- Electrical: Electrical work must be done by an RBQ-licensed electrical contractor, normally a CMEQ member.
- Plumbing and heating: Plumbing and heating work must be done by an RBQ-licensed contractor, normally a CMMTQ member.
Costs people forget on this project
Included as allowances above. Check any quote covers them too.
- Footing depth, quantity, and inspection
- Guard height and spindle spacing requirements
- Ledger flashing and waterproofing at the house wall
- Existing deck demolition and disposal
- Permit drawings including site plan
- Grading, stairs, or landing changes
Typical schedule: 1 to 3 weeks on site, plus permit review.
Questions homeowners ask
- Does a deck need a building permit?
- Many municipalities require a permit once a deck exceeds a set height or area, or when it is attached to the house. Because thresholds differ by municipality, treat every deck as a permit check.
- Is composite decking worth the extra cost?
- Composite raises material cost but lowers annual maintenance. Compare total cost over the years you expect to keep the home, not just the install price.