Calgary · Roof replacement planning
Roof Replacement Cost in Calgary
For a roof area around 2,000 sq ft - 20 roofing squares - Core Armour's current planning range is approximately $9,000-$16,000 before 5% GST, depending on the roof and replacement scope.
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Quick answer
A planning range, not a guaranteed starting price
Our current planning range for residential asphalt-shingle roof replacement is approximately $4.50-$8.00 per sq ft of roof area, or $450-$800 per roofing square. The lower end of that range reflects a straightforward, normal-size roof plan with Class 3 shingles and a full system. For a 20-square roof — about 2,000 sq ft of roof surface — that works out to approximately $9,000-$16,000, plus 5% GST. The range is for planning; the actual roof must be measured and scoped before a written estimate can be prepared.
Pricing context last reviewed: September 2026. 5% GST is additional.
20 roofing squares
$9,000-$16,000
before 5% GST
Roof area rate
$4.50-$8.00
per sq ft of roof surface
Roofing-square rate
$450-$800
per roofing square
Tax statement
5% GST
additional to the planning range
Our current planning range is not a universal minimum or a guaranteed public starting price. Other roofs can sit higher in the range when the layout, access, tear-off, disposal, or material choice changes.
For full service details, the replacement process, inspection, written estimate, and Core Armour's confirmed roofing-system scope, see the Calgary roof replacement service.
Measure the right thing
Roof area is not the same as house floor area
Roofing prices use the area of the roof surface that will be removed and replaced. One roofing square is 100 sq ft of roof surface, so 20 roofing squares represent approximately 2,000 sq ft of roof area.
That does not mean a 2,000 sq ft house has a 2,000 sq ft roof. Pitch, overhangs, attached sections, porches, and the roof plan all affect the measured surface. Do not convert house floor area into roof area using a generic formula; the actual roof needs to be measured.
Example only
This example is tied to roof area, not a promise about any particular house floor plan.
What changes the number
The same roof area can still have a different replacement cost
The planning range is intentionally broad because the roof plan and site conditions determine how much work is involved.
Pitch and roof shape
Slope, valleys, ridges, hips, skylights, chimneys, and porches change the work involved beyond the roof area alone.
Existing layers
The number of roof layers that must be removed affects tear-off time and disposal requirements.
Material and shingle class
Class 3 and Class 4 asphalt shingle choices sit at different points in the planning range. The exact material selection must be part of the estimate.
Disposal and dumpster fees
Tear-off material has to leave the property. Disposal and dumpster costs can change with the project scope and amount removed.
Access and building height
Multi-storey work, power lines, landscaping obstacles, and limited access can make material handling and site protection more involved.
Measured roof area
The roof must be measured as roof surface. House floor area is not a substitute for the area that will actually be replaced.
Material choice
Class 3 and Class 4 shingles belong in the estimate conversation
Core Armour installs asphalt shingles and offers Class 3 and Class 4 impact-resistant options, including IKO and Malarkey products. IKO Nordic and Malarkey Vista or Legacy are confirmed impact-resistant options used by the company.
Our current planning range does not establish a universal Class 4 premium, so this guide does not publish one. Ask for the selected product and class in the written estimate rather than treating the lower end of the planning range as a Class 4 price.
The roof replacement service page explains the confirmed system and material options. This page keeps the material discussion focused on budgeting and estimate comparison.
Before you compare quotes
What a useful roof replacement estimate should make clear
A planning range helps you prepare. A written estimate should explain the measured roof and the scope behind its number.
- 1
Measure the actual roof
Ask for the roof area and roofing-square count used for the estimate. One roofing square is 100 square feet of roof surface.
- 2
Describe the roof plan
Confirm the pitch, roof geometry, skylights, chimneys, porches, access conditions, and number of existing layers.
- 3
Name the material and class
The estimate should identify the selected asphalt shingle system and whether the project uses a Class 3 or Class 4 option.
- 4
Separate the planning range from the quote
Use the published range for early budgeting. A written estimate for the measured roof is the number to use for the actual project decision.
Scope evidence
Real projects show why roof scopes vary
These case studies document work Core Armour actually performed. They are examples of scope and conditions, not price examples or universal inclusions.
Roof ReplacementRoof replacement during a renovation in Spruce Cliff
A renovation-era replacement exposed an existing 1×6 plank roof deck and led to a plywood/OSB resheathing recommendation.
View case study
Roof RepairLeak-related roof replacement in Strathcona
A living-room leak led to a full replacement with flashing, plywood, vent and exhaust-pipe work.
View case study
Hail Damage Roof RestorationHail-damage roof replacement in Sage Hill
A full roofing-system replacement after owner-reported significant hail impact, using IKO Nordic Class 4 impact-resistant shingles.
View case studyCommon cost questions
Roof replacement cost questions in Calgary
Is $4.50 per sq ft a guaranteed starting price?
No. As of September 2026, it was the lowest price we had quoted in 2026. It describes a lower-end, straightforward Class 3 example and should be treated as part of the planning range, not a universal minimum.
What does 20 roofing squares mean?
Twenty roofing squares equal approximately 2,000 sq ft of roof surface because one roofing square is 100 sq ft. The number describes measured roof area, not the home's floor area.
Does the published range include GST?
No. For a 20-square roof — about 2,000 sq ft of roof surface — the planning example is approximately $9,000-$16,000, plus 5% GST, before any project-specific changes to scope.
How do I get the number for my roof?
Start with a roof inspection and a written estimate based on the actual measured roof, its pitch and geometry, existing layers, material choice, disposal, and access conditions. See the roof replacement service for the inspection and replacement process.
Planning a replacement?
Use the range to plan. Use the measured estimate to decide.
Core Armour offers free roof inspections and written estimates in Calgary and the surrounding service area. The next step is to see what your roof actually needs.
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