Roof Replacement Cost Calculator
Build a transparent roofing budget by roof area, state, material, pitch, stories, tear-off layers, decking repairs, roof details, permit and contingency.
Your project details
Change the assumptions below to match your project.
How this roof replacement cost calculator works
The calculator starts with an installed cost-per-square-foot planning range for the selected material. It adjusts that range for pitch and complexity, building height, broad state price levels and local-market sensitivity. It then adds tear-off layers, decking-repair allowance, skylights or other complex roof details, permits and owner-controlled contingency.
Roof replacement cost per square foot
Roof replacement cost per square foot changes with roofing material, labor, roof access, pitch, tear-off, decking repairs and local pricing. Enter the actual roof surface area above instead of relying only on your home’s interior square footage.
Roof replacement cost by house size
Planning a common house-size scenario? See our guides for roof replacement cost for a 1,500 sq ft house, roof replacement cost for a 2,000 sq ft house, and roof replacement cost for a 2,500 sq ft house.
Roof replacement cost by state
Start with our detailed guides for Texas, Florida, California, New York and Pennsylvania, or use the state-adjusted planner for all 50 states.
What can move a real roofing quote?
Decking repairs, flashing, ventilation, underlayment, disposal, permits, access, warranty, product brand and local labor can all change the final price. A low quote may also exclude items that a higher quote includes.
Compare tear-off, decking and roof details
Ask every bidder to state the number of layers being removed, the unit price for unexpected deck replacement, and how chimneys, skylights, valleys and wall transitions are flashed. These scope differences can explain a large price gap between quotes.
Compare roofing materials and measurements
Use the Roofing Square Calculator to convert roof area into roofing squares, the Roof Pitch Calculator to understand slope, and read metal roof vs shingles cost before comparing material options.
Best way to use the number
Use the range to establish a budget, then compare at least three itemized quotes with the same scope. Ask each contractor to identify exclusions and allowances in writing.
Frequently asked questions
Is house square footage the same as roof area?
No. Roof pitch, overhangs, attached garages, porches and the number of stories change actual roof surface area. Use measured roof area when available.
Does the estimate include tear-off and permits?
Yes, based on the tear-off layers and permit allowance you enter. Disposal, access and local requirements still need confirmation in contractor proposals.
How should I use the decking repair allowance?
Enter a reasonable square-foot allowance for planning, then ask contractors for a written unit price and approval process for deck repairs discovered after tear-off.
Is the state adjustment an exact local quote?
No. It is a broad state price-level sensitivity. Metro conditions, storms, contractor availability, product choice, insurance and code requirements can move local pricing.