Montreal, QC · Q3 2026
Roof renovation cost in Montreal
Tear-off layers, sheathing repair, and complexity. 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
$11,800 to $19,050
Typical $14,250 · 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 | $8,900 | $10,800 | $14,400 |
| Mid-rangeCommon homeowner choice: durable materials, better fixtures | $11,800 | $14,250 | $19,050 |
| PremiumHigh-end materials, custom detailing, designer fixtures | $16,550 | $20,000 | $26,700 |
Cost by size in Montreal
Typical all-in planning budgets at three representative sizes, mid-range finish.
| Size | Low | Typical | High |
|---|---|---|---|
| 1,200 sq ft | $8,550 | $10,350 | $13,850 |
| 1,800 sq ft | $11,800 | $14,250 | $19,050 |
| 2,600 sq ft | $16,100 | $19,400 | $25,950 |
Where the money goes
The $14,250 typical figure for Montreal, broken into the lines a contractor quote should also separate.
| Category | Low | Typical | High |
|---|---|---|---|
| Materials | $3,950 | $4,750 | $6,350 |
| Labour | $3,950 | $4,750 | $6,400 |
| Demolition and disposal | $1,550 | $1,900 | $2,500 |
| Permit and design allowance | $650 | $800 | $1,050 |
| Subtotal | $10,100 | $12,200 | $16,300 |
| Contingency (17%) | $1,700 | $2,050 | $2,750 |
| Total planning budget | $11,800 | $14,250 | $19,050 |
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× | $14,250 | — |
| Quebec City | 0.93× | $13,500 | -5% |
| Other Quebec | 0.91× | $13,200 | -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
- Roof structure or sheathing changes. Replacing shingles is often exempt, but structural repairs, added skylights, or new sheathing layers can require a permit.
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.
- Plywood replacement discovered during tear-off
- Ice and water shield coverage requirements
- Chimney, vent, and wall flashing
- Attic ventilation corrections
- Multiple disposal bins for layered roofs
- Access equipment for steep or tall roofs
Typical schedule: 1 to 4 days for a typical asphalt reroof.
Questions homeowners ask
- Can I put new shingles over old ones?
- Sometimes, but an overlay hides sheathing problems, adds weight, and usually shortens the life of the new roof. Most quotes assume a full tear-off for good reason.
- Why do quotes include a plywood allowance?
- Damaged sheathing only becomes visible after tear-off. A per-sheet or per-square-foot allowance keeps that repair from becoming an open-ended change order.