Estimate a full roof replacement budget from footprint, pitch, roofing system, tear-off, underlayment, flashing, decking allowance, access, and region.
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Total range = estimated roofing squares x adjusted replacement cost per square, with tear-off, roofing system, underlayment, flashing, decking allowance, access, and region factors included.
Roof area is estimated from building footprint x pitch factor, then divided by 100 to estimate roofing squares. The result is for full roof replacement planning, not a storm claim settlement or contractor quote.
Cost basis: US national roof replacement baseline adjusted by roofing system, tear-off scope, underlayment package, flashing complexity, decking allowance, access, and broad region factor.
The calculator estimates roofing squares from footprint and pitch, then applies replacement-specific factors to show a low, typical, and high budgeting range.
If a quote is far above the range, check whether it includes premium shingles, extensive decking, ventilation corrections, chimney flashing, skylight work, steep access, or long workmanship coverage.
Complex replacement stacks pitch, disposal, flashing, decking, access, and region modifiers, so the typical range can move much higher than a simple asphalt tear-off.
Ask roofers to separate known scope from allowance items so decking, chimney flashing, ventilation, and skylight decisions do not hide inside one lump-sum price.
Use this page for full replacement planning. Use the broader roof cost calculator when you only need an early roof budget without detailed replacement scope.
| Scope | Often included | Confirm in the quote |
|---|---|---|
| Basic asphalt tear-off | One layer removal, architectural shingles, cleanup, disposal | Starter, ridge cap, drip edge, pipe boots, permit, workmanship warranty |
| Upgraded asphalt system | Synthetic underlayment, ice/water barrier, valley treatment | Ventilation, ridge vent, manufacturer warranty, roof deck repair pricing |
| Complex roofline | Steep pitch, dormers, skylights, chimneys, many transitions | Step flashing, cricket work, safety setup, lift or staging allowance |
| High repair-risk roof | Soft decking, leak history, old ventilation, multiple layers | Per-sheet decking charge, change order process, hidden damage exclusions |
Roof replacement quotes should separate known scope from allowance work discovered after tear-off.
Two roof replacement bids can use the same shingle name but include different system details.
| Line item | Lower-scope bid may say | Higher-scope bid may include |
|---|---|---|
| Roof area | Footprint estimate | Measured roof squares, waste, valleys, overhangs |
| Removal | One layer tear-off | Multiple layers, dumpster, magnetic cleanup, site protection |
| Waterproofing | Felt underlayment | Synthetic underlayment, ice/water shield, valley membrane |
| Flashing | Reuse where possible | New step flashing, chimney flashing, skylight kits, pipe boots |
| Decking | Decking extra if needed | Per-sheet allowance, photo documentation, change-order cap |
| Ventilation / warranty | Basic ridge vent | Intake/exhaust balance, manufacturer system warranty |
Ask each roofer to document excluded structural work, solar removal, chimney repair, skylight replacement, and insurance claim handling.
Before comparing roof replacement prices, make sure each written bid uses the same measured roof area, material system, tear-off, waterproofing, flashing, decking, ventilation, warranty, and payment assumptions.
Simple shape, one tear-off layer, asphalt shingles, basic underlayment, and easy access.
Architectural shingles, synthetic underlayment, standard flashing, disposal, warranty, and minor deck allowance.
Steep roof, premium material, multiple layers, chimneys, skylights, decking repair, ventilation corrections, or difficult staging.
Manually curated US roof replacement baseline ranges informed by public roofing cost guides, material references, disposal scope patterns, and contractor quote comparison practices. This is a planning estimate, not an insurance scope, ZIP-level local price, or contractor bid.
v0 uses a US national baseline plus broad state/region adjustment. It does not provide ZIP-level pricing.
No. It is a planning calculator for comparing budgeting ranges. A roofer still needs to inspect layers, decking, flashing, ventilation, access, permits, and local code requirements before giving a quote.
A general roof cost estimate can be a broad budget. A replacement quote should spell out tear-off, disposal, underlayment, flashing, decking allowance, ventilation, cleanup, warranty, and change-order terms.
It includes a selectable decking allowance, but hidden sheathing damage can only be confirmed after tear-off. Ask each roofer for the per-sheet or per-square-foot price before work begins.
No. Gutter replacement, major fascia repair, rafter repair, chimney repair, skylight replacement, solar removal, and drainage work are separate scopes.
No. It does not handle claim scope, coverage, depreciation, code upgrades, supplements, or adjuster decisions. Use it only as a budgeting reference and consult qualified roofing or claim professionals.
Quotes vary because measured roof area, pitch, material system, underlayment, flashing, deck repair, ventilation, access, warranty, disposal, and local labor can all differ between contractors.