Ontario · Metal roof cost, 2026
Metal roof cost in Ontario (2026)
On 57 Interlock® aluminum roofs we installed in Ontario in 2025 and 2026, the middle half of contracts came to $28,400 to $54,800, a median of $39,700. By roof area that is $179 to $212 per square metre ($16.59–$19.66/sq ft). Your own price is fixed in writing after one free visit.
Reviewed by Scott Plumptree, Director of Marketing, The Interlock Group · Updated October 7, 2026
Median contract
$39,700
57 Ontario jobs, 2025 and 2026.
Per square metre
$179 to $212 per square metre
Middle half of jobs.
Median roof
About 195 m²
(2,100 sq ft)
What Ontario homeowners paid
These are the contract prices on the 57 Interlock® roofs we contracted in Ontario in 2025 and 2026, taken from our own job book. We use only 2025 and 2026 contracts, so the figures reflect what homeowners are paying now, after recent material cost and tariff changes, rather than older prices adjusted by an estimate. The middle half of jobs fell between $179 to $212 per square metre ($16.59–$19.66/sq ft) of roof area, with a median of $197 per square metre ($18.32/sq ft).
| Per square metre of roof | Whole roof | |
|---|---|---|
| Middle half of jobs | $179 to $212 per square metre ($16.59–$19.66/sq ft) | $28,400 to $54,800 |
| Median job | $197 per square metre ($18.32/sq ft) | $39,700 |
| Most jobs (10th to 90th percentile) | $172 to $236 per square metre ($15.97–$21.91/sq ft) | — |
| Slate profile (49 jobs) | $179 to $209, median $197 | — |
| For comparison: 2023 jobs (134) | Median $182 per square metre ($16.95/sq ft), 8% below today | — |
Source: Interlock Metal Roofing (Ontario) Ltd. job book, 57 Ontario contracts, 2025 and 2026. Contract price as signed. The median roof was about 195 m² (2,100 sq ft); the middle half ran from 139 m² to 288 m². Your price is set in writing after one visit.
Roofs behind these numbers
Recent Ontario Interlock® roofs. Tap a roof to see all of its photos.
What moves the price on your roof
Roof area
The biggest single factor: the more square metres of roof, the more material and labour.
Pitch and complexity
Valleys, hips, dormers, skylights and chimneys each add flashing and time. Every Interlock profile needs a minimum 3/12 slope.
What comes off
Cedar, concrete tile and natural slate always come off; a single layer of asphalt can be roofed over only if the inspection finds it suitable. Deck repairs go into the written quote, not a change order.
Profile and options
Slate, Cedar Shingle, Shake, Mediterranean Tile, Standing Seam and solid copper are priced differently. The Class A fire-rated assembly (two layers of GAF VersaShield® over 12 mm (15/32-inch) plywood), snow guards and gutters are line items.
Access
Tight downtown lots, steep driveways, condo and townhouse complexes, and cottages reached by a long road or by water change the logistics, and we plan them at the estimate.
Financing
Financing is offered only as a promotion, and offers change. The current offer, when there is one, is on our financing page with its terms.
What the price includes
- The Interlock® aluminum roof, made in Canada by Interlock Roofing, installed by our own Ontario company.
- The Guardian Lifetime Limited Material Warranty from the manufacturer: material and finish, for as long as the original purchaser owns the home, transferable once.
- Wind resistance warranted to 193 km/h (120 mph) installed to manufacturer specification.
- A fixed price in writing: what the inspection finds goes into the quote before you sign.
Comparing it with steel and asphalt
Aluminum costs more than steel or asphalt up front. The fair comparison is over the years you'll own the home: an asphalt roof lasts about 20 years on published averages and is torn off and replaced, while an Interlock roof is built to be the last one. Get every quote in writing and compare them over the same period.
Questions, answered
How much does a metal roof cost in Ontario?
For an Interlock® aluminum roof, the middle half of our 57 Ontario contracts from 2025 and 2026 came to $28,400 to $54,800, with a median of $39,700. Your own price depends on area, pitch, what comes off and the profile; we give it in writing after one free visit.
How much does a metal roof cost per square foot in Ontario?
On our Ontario jobs in 2025 and 2026, the middle half fell between $179 to $212 per square metre ($16.59–$19.66/sq ft), with a median of $197 per square metre ($18.32/sq ft).
Have metal roof prices gone up in 2026?
Yes. On our own Ontario jobs, the median price per square metre rose from $182 in 2023 to $197 in 2025 and 2026, about 8%. The prices on this page are from 2025 and 2026 contracts only, so they already reflect current costs.
Do these prices include HST?
They are the contract prices as signed. Your written quote shows exactly what is included, taxes too.
Why is aluminum more expensive than steel?
Aluminum costs more as a metal, and an Interlock roof uses interlocking panels with concealed fasteners rather than exposed screws. What you get for it is a roof that doesn't rust and a Guardian Lifetime Limited Material Warranty.
Is the estimate free?
Yes. The visit, on Zoom or at your home, and the written price are free and without obligation. Call (416) 620-2174.
Sources
- National Association of Home Builders / Bank of America Home Equity: Study of Life Expectancy of Home Components (February 2007)
- Guardian Lifetime Limited Material Warranty (full terms)
Product specifications are the manufacturer's (Interlock Roofing). Install counts are from our own job book. Reviewed by Scott Plumptree, October 7, 2026.
Get your fixed price in writing.
A fixed price in writing after one visit, at your home or on Zoom. Interlock Metal Roofing (Ontario) Ltd. · 2800 Argentia Rd #5, Mississauga, ON L5N 8L2
