Estimate total roof replacement cost for asphalt shingles, metal, or tile roofing. This tool calculates roofing squares, tear-off labor by layer count, decking replacement, and flashing add-ons so you can compare a full project budget before requesting contractor bids.
Get accurate cost estimates before calling a contractor — compare prices and plan your budget.
Current concrete prices per yard, per sq ft, and per bag — updated for 2026 with regional cost breakdowns.
View Chart →| Material | Installed Cost per Sq Ft | Cost per Square (100 sq ft) | Expected Lifespan |
|---|---|---|---|
| 3-tab asphalt shingles | $4.00 to $6.00 | $400 to $600 | 15 to 20 years |
| Architectural asphalt shingles | $6.50 to $11.00 | $650 to $1,100 | 20 to 30 years |
| Standing seam metal | $9.00 to $16.00 | $900 to $1,600 | 50 to 70 years |
| Stone-coated steel | $11.00 to $18.00 | $1,100 to $1,800 | 40 to 60 years |
| Concrete tile | $10.00 to $18.00 | $1,000 to $1,800 | 40 to 50 years |
| Synthetic tile | $8.00 to $14.00 | $800 to $1,400 | 40 to 50 years |
Ranges reflect 2026 national installed pricing surveys and vary by region, roof pitch, and tear-off complexity.
Roofers price and order material in squares, where 1 square equals 100 square feet of roof surface. A 2,000 sq ft roof equals 20 squares before any waste factor is added.
Simple gable roofs need about 10% extra material for cuts and overlap. Roofs with multiple valleys, hips, dormers, or turrets often require 15% to 20% waste factor to avoid running short mid-job.
Pitch is expressed as rise over a 12-inch run. A 4/12 pitch rises 4 inches per foot and is considered standard walkable. Anything at 7/12 or steeper typically requires harness systems, which slows installation and raises labor cost.
Many local codes cap roofs at 2 layers of asphalt shingles before requiring a full tear-off to bare decking. Each additional layer removed adds roughly 35% more tear-off labor time per the layer multiplier used in this calculator.
For material quantity planning beyond cost, the lumber calculator and construction labor cost calculator can help estimate framing repairs and crew labor rates separately from this roofing estimate.
Roof area: 2,000 sq ft
Squares (raw): 20 sq
Waste factor: 10%, squares with waste: 22 sq
2,000 sq ft x 1.10 x $9.00/ft² x 1.10 pitch = $21,780 material
20 sq x $100/sq x 1.10 pitch = $2,200 tear-off
Permit fee: $250
Estimated total: $24,230
This falls near the middle of the $9,000 to $27,000 national range reported for mid-size architectural shingle roofs in 2026.
Roof area: 1,800 sq ft
Squares (raw): 18 sq
Layer multiplier: 1.35 (2 layers)
1,800 sq ft x 1.10 x $21.00/ft² x 1.00 pitch = $41,580 material
18 sq x $100/sq x 1.35 layer x 1.00 pitch = $2,430 tear-off
Estimated total (before permit): $44,010
Metal roofing carries a higher upfront cost but a 50 to 70 year lifespan means fewer replacement cycles over the life of the home.
Roof area: 2,400 sq ft
Decking cost: 2,400 x $3.25/ft²
Pitch multiplier: 1.25 (steep)
2,400 sq ft x 1.10 x $18.50/ft² x 1.25 pitch = $61,050 material
Decking replacement: $7,800
24 sq x $100/sq x 1.25 pitch = $3,000 tear-off
Estimated total (before permit): $71,850
Concrete tile on a steep roof with decking replacement is among the most expensive roofing scenarios homeowners face, largely due to weight-related labor and structural prep.
Roof surface area is larger than the home's footprint because of overhangs and pitch. Measure the actual roof plane area, not the floor plan square footage.
Roofs with valleys, hips, or dormers lose more material to cuts than a simple gable roof. Using a flat 10% waste factor on a complex roof often results in a mid-project material shortage.
Water-damaged decking is frequently discovered only after old shingles come off. Quotes that assume perfect decking can be off by thousands once replacement boards are needed.
Switching from asphalt to concrete tile or stone-coated steel adds substantial weight. Older homes may need a structural engineer's review before the switch is approved.
National average roof replacement runs roughly $9,000 to $27,000 for a typical home, or $4 to $30 per square foot depending on material. Asphalt shingles fall at the low end near $4 to $9 per sq ft, while slate and premium tile run $15 to $30 per sq ft, based on 2026 industry pricing data.
A roofing square equals 100 square feet of roof area. To find squares, divide total roof area in square feet by 100. A 2,400 sq ft roof equals 24 squares before waste factor is added.
A 10% waste factor is standard for simple gable roofs. Complex roofs with multiple valleys, hips, or dormers often need 15% to 20% waste factor to account for cut pieces and pattern alignment.
Yes. Steeper roofs slow down installation and require harness safety systems, which raises labor cost. Roofs at 7/12 pitch or steeper commonly see a 25% or higher labor increase compared to a standard 4/12 to 6/12 walkable roof.
Many building codes allow up to 2 layers of asphalt shingles before requiring full tear-off to bare decking. Adding a layer over existing shingles saves tear-off cost but can void some manufacturer warranties and hide decking damage.
Tear-off and disposal typically runs about $100 per roofing square for a single layer, based on 2026 national contractor pricing. Multiple existing layers add roughly 35% more labor time per additional layer removed.
IBC 2024 Section 1507.1.1 requires an ice barrier membrane at eaves in areas with a history of ice damming, typically extending 24 inches inside the exterior wall line. Local code amendments vary, so check with your building department.
Pitch multipliers and layer multipliers reflect common roofing industry practice, not a single universal code requirement. Confirm local permit and layer-stacking rules before installation.
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