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If your shingles are curling, granules are piling up in the gutters or you’ve had a second leak in two winters, you’re probably wondering what a full replacement is going to cost. It’s a fair question, and the honest answer is that it depends — but not in a vague way. A handful of very specific factors move the price up or down, and once you understand them, the quotes you receive start to make a lot more sense.

Below, we walk through realistic price ranges for the Montreal area, what pushes a job to the high end, and how to read a quote so you know exactly what you’re paying for.

The average cost to replace a roof in Montreal

For a typical single-family house or plex with asphalt shingles, many Montreal homeowners pay roughly $8,000 to $20,000 before taxes. Broken down by area, that’s often around $6 to $12 per square foot installed. That range varies with the size of the roof, its slope, how easy it is to access and the condition of what’s underneath.

If you’re considering steel or another metal roof, expect roughly double the upfront price of shingles — often around $13 to $30 per square foot. The trade-off is longevity: a well-installed metal roof typically lasts far longer than shingles.

All of these are rough figures before taxes. Lifespans are typical and depend heavily on climate, ventilation and installation quality.

What drives the price up or down

Two houses on the same street can get very different quotes. Here’s why.

Size and shape

More square footage means more material and more labour, but shape matters too. A simple gable roof goes quickly. A roof with dormers, valleys, skylights and several chimneys takes far more cutting, flashing and time.

Slope and access

A steep roof requires extra safety equipment and slower work. Access is a big factor in Montreal: say you own a duplex in Rosemont with a narrow lane and no room for a dumpster. The crew may need to carry debris by hand or arrange a permit to occupy the street, and that shows up on the bill.

What’s under the shingles

Nobody knows the condition of the roof deck until the old shingles come off. If plywood or boards are rotten from an old leak, they need to be replaced. A good contractor will explain upfront how they price this — usually per sheet — so there are no surprises.

Number of layers to remove

Some older homes have two layers of shingles. Tearing off more material means more labour and more disposal fees.

Season and urgency

Emergency, winter or after-hours work generally costs more. If your roof is ageing but not leaking, planning the job for a regular season usually gets you better pricing and more choice of contractors.

Don’t forget the taxes

Most quotes are written before taxes. In Quebec, GST (5%) and QST (9.975%) — 14.975% in total — are usually added on top. On a five-figure roofing job, that’s a significant amount, so factor it into your budget from the start. When you compare quotes, make sure you’re comparing them on the same basis: all before taxes or all after.

What a complete quote should include

A low number means nothing if half the work is missing. A detailed written quote should spell out:

• Removal and disposal of the old roofing, including the number of layers
• The brand and line of shingles or metal panels
• Underlayment, ice and water membrane in valleys and at the eaves
• New flashing around chimneys, walls and plumbing vents
• Ventilation work (roof vents, ridge vent, soffit openings)
• The price per sheet for any deck replacement
• Who handles the municipal or borough permit, if one is required
• Start date, expected duration and payment schedule
• Warranty details for both materials and workmanship

How to protect yourself when you hire

In Quebec, any roofing contractor must hold a licence from the Régie du bâtiment du Québec (RBQ) with the right subclass. You can verify it in a few minutes with the RBQ’s online licence search. RBQ licence holders must also provide a security bond that may compensate clients in some situations — another reason never to hire someone without a licence.

It’s also worth checking the merchant’s record with the Office de la protection du consommateur (OPC). And if a contractor knocks on your door and you sign a contract at home, the Consumer Protection Act generally gives you 10 days to cancel.

Above all, comparing quotes from several licensed contractors is the best protection you have. It shows you what a fair price looks like for your specific roof and makes outliers — too high or suspiciously low — easy to spot.

Is cheaper ever better?

Not usually. A quote that’s far below the others often skips ventilation, reuses old flashing or leaves out the ice and water membrane. Those shortcuts don’t show on day one, but they can cut years off your new roof’s life. Under the Civil Code of Québec, the contractor is liable for five years for loss of the work due to construction defects, but that protection is only useful if the contractor is still in business and properly licensed.

That said, the most expensive quote isn’t automatically the best either. Look for the one that’s clearest, most complete and comes from a contractor who answers your questions without pressure.

Bottom line

The average cost to replace a roof in Montreal is roughly $8,000 to $20,000 before taxes for asphalt shingles on a typical home, with metal costing roughly double upfront. Your final price depends on size, slope, access, the condition of the deck and timing. Add 14.975% for taxes, verify the RBQ licence, and get written, detailed quotes from more than one contractor. Permit rules vary by municipality and borough, so confirm those locally before work begins.

Frequently asked questions

Do I need a permit to replace my roof in Montreal?

It depends on your borough or municipality, since each sets its own rules. Some require a permit for a like-for-like replacement and others don’t, so check locally or ask your contractor to confirm.

Can I put new shingles over the old ones to save money?

Some contractors offer it, but most recommend a full tear-off so they can inspect the deck and install a proper membrane. Adding a layer can hide damage and may shorten the new roof’s life.

How long does a roof replacement take?

A typical house is often done in one to a few days, depending on size, complexity, weather and how much deck repair is needed. Your quote should include an expected duration.

You may also search for:How to Hire a Roofer: A Montreal Homeowner's GuideWhat Questions Should I Ask Before Hiring a Roofer?How Many Roof Repair Estimates Should I Get?All Home Services

Estimations.pro is a referral service and does not perform the work. Prices are indicative only and vary with the size, slope, access and condition of your roof. Requirements (RBQ licence, municipal permits, programs) can change: check with the relevant organizations and get detailed written quotes.

A drip in the hallway ceiling, a few shingles on the lawn after a windy night, a dark stain spreading near the chimney. The first question most Montreal homeowners ask is not how to fix it, but how much it is going to cost. Fair question. Roof repair prices can feel like a black box, and the gap between two quotes for the same job can be surprising.

Here is how an estimator thinks about a roof repair bill, what a reasonable price looks like, and how to spot a quote that does not add up.

How much should you pay for a roof repair in Montreal?

For most small, targeted jobs, a roof repair in Montreal costs roughly a few hundred dollars up to about $2,000 before taxes. That range covers the bread-and-butter work: replacing a handful of damaged shingles, resealing or replacing a flashing, changing a cracked plumbing boot, or patching a small section of a flat roof membrane.

Every roof is different, so the exact number varies with size, slope, access and condition. Emergency, winter or after-hours work costs more, sometimes noticeably more, because the crew has to drop other jobs, work in the cold and take extra safety measures.

Remember that taxes are usually added on top. GST is 5% and QST is 9.975%, so you are looking at 14.975% more than the pre-tax figure on most quotes.

Typical roof repairs and rough price ranges

Rather than inventing a price for every scenario, it helps to think in terms of job size. The table below is a rough guide, before taxes, and assumes normal access.

If a repair quote starts creeping toward the cost of a partial replacement, that is a signal to step back and ask whether repairing still makes sense. For context, many homeowners pay roughly $8,000 to $20,000 before taxes to replace an asphalt shingle roof on a typical house in Quebec.

What drives the price of a roof repair

Two roofs with the same leak can produce two very different bills. Here is what usually makes the difference.

Access and height

Say you own a duplex in Rosemont with a flat roof and no easy way up. The crew may need extra ladders, a lift or more time to carry materials. A bungalow in Pointe-Claire with a gentle slope and a driveway right beside it is simply faster to work on.

Slope and roof type

Steep roofs require harnesses, anchors and more care, which adds labour. Flat roofs with an elastomeric membrane or tar and gravel need different materials and skills than sloped shingle roofs. Metal and cedar repairs often cost more because the materials and techniques are more specialized.

Hidden damage

The visible problem is not always the whole problem. Once a roofer lifts the shingles, they may find rotten decking or wet insulation. A good contractor will explain upfront how they handle surprises, ideally with a unit price for replacing damaged plywood.

Season and urgency

Spring and fall are busy. Winter work is slower and riskier. If you need someone the same day, expect to pay for that priority.

What a fair roof repair quote should include

A professional quote is written, detailed and easy to understand. Before you sign, look for:

• The contractor’s legal name, address and Régie du bâtiment du Québec (RBQ) licence number
• A clear description of the work, including the area and the materials
• Labour and materials, or at least a clear total for each part of the job
• How hidden damage such as rotten decking will be priced
• Cleanup and disposal of old materials
• GST and QST shown separately
• A warranty on the workmanship, in writing
• An estimated start date and duration

A quote scribbled on the back of a business card, or a price given only verbally, is not enough. If something goes wrong later, the written document is what protects you.

How to tell if a price is too high or too low

A quote that is far above the others may include work you do not need, such as a full replacement pushed on a roof that only needs a flashing. A quote that is far below may cut corners: reusing old flashing, skipping underlayment or using workers who are not properly qualified.

The best protection is to compare quotes from several licensed contractors for the same scope of work. When three or four professionals look at your roof, patterns appear quickly. If three say the problem is a chimney flashing and one says you need a new roof, you know which question to ask.

Also check the basics before you compare prices. Look up each contractor’s licence with the RBQ online search and make sure the subclass covers roofing. The Office de la protection du consommateur (OPC) lets you check a merchant’s record for complaints.

Repair now or wait?

Small roof problems rarely stay small. Water that gets past a shingle can soak the decking, then the insulation, then the ceiling. In Montreal’s freeze-thaw cycles, a minor gap can widen fast. Waiting for spring to fix a leak you noticed in November often means paying for interior repairs on top of the roof work.

That said, an urgent visit does not always have to be a full repair. Sometimes a roofer can tarp or seal the area temporarily in winter and come back for a proper fix when the weather allows. Ask whether that option makes sense for your situation.

Bottom line

For most small and medium jobs, you should expect to pay roughly a few hundred dollars up to about $2,000 before taxes for a roof repair in Montreal, with emergency and winter work costing more. The real price depends on size, slope, access and condition, so no online number replaces an inspection. Ask for written, detailed quotes, verify the RBQ licence, and compare several before you decide. Rules, warranties and practices can vary, so take the time to read what you sign.

Frequently asked questions

Is it worth repairing an old roof instead of replacing it?

If the damage is limited to one area and the rest of the roof is in decent shape, a repair is usually the smarter spend. If the shingles are curling everywhere or leaks keep coming back, the money is often better put toward a replacement.

Do roofers charge for an inspection or a quote?

Many contractors offer free quotes for standard jobs, while some charge for detailed inspections or emergency visits. Ask before the visit so there are no surprises.

Should I pay a deposit for a roof repair?

A reasonable deposit for materials can be normal on larger jobs, but be wary of anyone asking for a large cash payment upfront. Keep payments tied to the written contract and avoid paying the full amount before the work is done.

You may also search for:What Is the Average Cost to Replace a Roof in Montreal?How to Hire a Roofer: A Montreal Homeowner's GuideWhat Questions Should I Ask Before Hiring a Roofer?All Home Services

Estimations.pro is a referral service and does not perform the work. Prices are indicative only and vary with the size, slope, access and condition of your roof. Requirements (RBQ licence, municipal permits, programs) can change: check with the relevant organizations and get detailed written quotes.

Your roof is leaking over the back bedroom, or a few shingles blew off in last night’s wind. You want it fixed, you want it fixed properly, and you don’t want to overpay. The first question most homeowners ask is simple: how many roofers should I call before I decide?

After years of looking at roofing quotes across Montreal, Laval and the South Shore, the answer is pretty consistent. Here’s the reasoning, and how to make those estimates actually useful.

How many roof repair estimates should you get?

For most jobs, three to four roof repair estimates is the sweet spot. That’s enough to see a real price range and spot the outlier, but not so many that you spend three weeks booking visits while water keeps coming in.

Here’s how the numbers tend to play out:

• One estimate: you have no idea whether the price is fair, whether the diagnosis is right, or whether the roofer is upselling.
• Two estimates: better, but if they’re far apart, which one is right? You’re often left guessing.
• Three to four estimates: a pattern appears. Usually two or three land in a similar range and one stands out. That pattern is what protects you.
• Five or more: diminishing returns. Visits pile up, details blur together, and good roofers may move on to other clients before you decide.

That’s exactly why Estimations.pro sends a single free request to up to four licensed contractors. You describe the job once, and you get enough comparable quotes to make a confident decision without chasing roofers one by one.

Why one quote is never enough

A roof repair is harder to judge than, say, a new fridge. You can’t easily see the problem yourself, and two roofers can look at the same leak and propose very different fixes.

Say you own a duplex in Rosemont with a flat roof and a stain spreading on the upper unit’s ceiling. One roofer might suggest patching the membrane around a vent. Another might find that the flashing at the parapet is the real culprit. A third might tell you the membrane is near the end of its life and patching will only buy a season or two. With only one opinion, you’d never know which story fits your roof.

Multiple estimates give you multiple diagnoses. When three roofers independently point to the same flashing, you can trust it. Honestly, comparing quotes from several licensed contractors is the best protection you have against both overcharging and the wrong repair.

What makes estimates comparable

Three quotes are only useful if they describe the same job. Otherwise you’re comparing apples to oranges, and the cheapest number usually wins for the wrong reasons.

Ask every roofer the same questions

• What exactly is causing the problem?
• What will you repair or replace, and over what area?
• Which materials and brands will you use?
• Does the price include removal of old materials, disposal and cleanup?
• Is there a warranty on the workmanship, and for how long?
• Are taxes included or added on top?

Insist on written, detailed quotes

A number scribbled on a business card is not an estimate. A proper quote lists the scope, materials, quantities where possible, start date, payment terms and warranty. It also shows the contractor’s RBQ licence number. Keep in mind that GST (5%) and QST (9.975%) are usually added on top, for 14.975% in total, so check whether each quote is before or after taxes.

How to read the price spread

Once you have your estimates side by side, look at the pattern rather than just the lowest figure. For context, small roof repairs like a few shingles, a flashing or a plumbing boot often run roughly a few hundred dollars up to about $2,000 before taxes, and the price varies with size, slope, access and condition. Emergency, winter or after-hours work costs more.

The low quote isn’t automatically a trap, and the high one isn’t automatically a rip-off. Ask each roofer to explain the difference. A good contractor will happily walk you through it.

When fewer estimates make sense

There are times when you shouldn’t wait for four visits. If water is pouring into your living room or a tree branch has gone through the roof deck, your priority is stopping the damage. Call for an emergency tarp or temporary repair first, then get proper estimates for the permanent fix.

If the damage came from a storm or a fallen tree, contact your insurer early too. Home insurance usually covers sudden and accidental damage but not wear and tear or lack of maintenance, and your deductible applies. Your insurer may have its own requirements about estimates, so ask before you sign anything.

And please, don’t climb up there yourself to look, especially if the roof is wet, icy, snowy or steep. That’s the roofer’s job.

Red flags while collecting quotes

Getting several estimates also helps you notice warning signs, because good contractors start to look very different from risky ones.

• No RBQ licence number, or one that doesn’t cover roofing work.
• Pressure to sign today for a special price.
• A large cash deposit before any work is scheduled.
• A vague quote with no description of materials or scope.
• A door-to-door offer right after a storm.

If you do sign a contract at home with an itinerant merchant, Quebec’s Consumer Protection Act generally lets you cancel within 10 days. You can also check a merchant’s record with the Office de la protection du consommateur (OPC) before committing.

Bottom line

Aim for three to four written, detailed roof repair estimates from RBQ-licensed roofers, all quoting the same scope. That’s enough to see the fair price, compare diagnoses and spot anything that doesn’t add up. Rules on permits vary by municipality and borough, and insurance coverage varies by insurer, so confirm the details for your own situation. Then pick the roofer whose quote is clear, complete and fairly priced, not just the cheapest one.

Frequently asked questions

Is it rude to ask several roofers for estimates?

Not at all. Professional roofers expect homeowners to compare quotes, and most will tell you so. Just be honest and let the others know once you've chosen.

Should roof repair estimates be free?

Many roofers offer free estimates for standard repairs in the Montreal area. Some charge for detailed inspections or reports, so ask upfront whether there's a fee.

How long is a roof repair estimate valid?

It depends on the contractor, and the validity period is often written on the quote. Material prices and schedules change, so confirm the price is still good before you sign.

You may also search for:Red Flags to Avoid When Hiring a RooferHow to Find Local Roofers Near You in MontrealCan I Hire a Roofing Subcontractor Directly Instead of a Company?Roofing Quotes in Montreal

Estimations.pro is a referral service and does not perform the work. Prices are indicative only and vary with the size, slope, access and condition of your roof. Requirements (RBQ licence, municipal permits, programs) can change: check with the relevant organizations and get detailed written quotes.