Roof Replacement Cost Calculator
Estimate the cost of a new roof based on roof area, material, and complexity.
How much does a roof replacement cost?
Roof replacement cost is primarily driven by roof square footage, the material you choose, and how complex the roof's shape is. Note that roof square footage is usually larger than your home's floor square footage because of roof pitch and overhangs — a simple gable roof might only add 10-15% over the footprint, while a steep or multi-sided roof can add considerably more surface area. This calculator lets you enter the roof's actual square footage directly for the most accurate estimate.
Why does material choice matter so much?
Asphalt shingles remain the most affordable and common roofing material in the US, while metal, tile, and slate cost significantly more upfront but often last 2-4x longer and may reduce long-term maintenance and insurance costs. Complexity also plays a large role — a roof with many valleys, dormers, skylights, or a steep pitch requires more labor, safety equipment, and material cuts, which is why this calculator applies a complexity multiplier on top of the base material cost.
Tips for getting an accurate roofing quote
Always get multiple quotes from licensed, insured roofing contractors, and ask whether the quote includes tear-off and disposal of your old roof, new underlayment, flashing, and ventilation upgrades, since these can add meaningfully to the total. Prices also vary significantly by region due to labor costs and local permitting requirements, so treat this calculator as a starting estimate rather than a final number.
Frequently Asked Questions
How much does it cost to replace a roof?
For an average 2,000 square foot roof, asphalt shingle replacement typically runs $9,000-$13,500, while metal, tile, or slate roofing can cost two to three times more. Enter your roof's square footage and material above for a specific estimate.
Is roof square footage the same as my home's square footage?
No — roof area is almost always larger than your home's floor area because of roof pitch, overhangs, and eaves. A simple roof might only add 10-15%, but steep or complex roofs can add significantly more surface area than the footprint below.
What is a roofing "square"?
A roofing square equals 100 square feet of roof area. Roofers typically quote and order materials by the square, so a 2,000 square foot roof would be described as 20 squares.
Which roofing material lasts the longest?
Slate and tile roofs can last 50-100+ years, metal roofs typically last 40-70 years, and asphalt shingles last 15-30 years depending on climate and quality. Longer-lasting materials cost more upfront but may lower lifetime replacement costs.
Why do complex roofs cost more to replace?
Roofs with steep pitches, multiple valleys, dormers, or skylights require more labor hours, additional safety equipment, and more material cuts and waste, which increases overall installation cost even at the same square footage as a simple roof.
Does homeowners insurance cover roof replacement?
Insurance often covers roof replacement if damage results from a covered event like a storm, hail, or fallen tree, but typically not for normal wear and aging. Check your policy's specific roof age and depreciation rules, since many insurers reduce payouts on older roofs.
Should I repair or fully replace my roof?
Small, localized damage on a roof under 15-20 years old is often worth repairing, but widespread leaks, missing shingles across multiple areas, or a roof nearing the end of its expected lifespan usually make full replacement more cost-effective long term.
How accurate is this roof cost estimate?
This calculator uses simplified average material costs per square foot for planning purposes only. Actual costs depend on your roofer, regional labor rates, tear-off and disposal fees, decking repairs, and permit costs, so always collect a few written quotes before budgeting a final number.