Get an instant cost estimate for your roofing project. Our calculator provides estimates adjusted for your state using regional cost indices.
Why this calculator
I built these calculators after years of watching homeowners get blindsided by quotes that had no relation to real regional pricing. The model pulls from contractor bid data, BLS labor rates, and state-specific construction cost indices so the estimate you get reflects what your neighbors are actually paying, not a national average. Get 3+ licensed quotes to confirm.
Tip: Your roof area is typically 1.2-1.5x your home's floor area
Bloggers, realtors, contractors, and publishers: copy one line of code and give your readers a state-adjusted roofingcost estimate. Auto-updates — no maintenance needed.
Our roofing calculator uses per-square (100 sq ft) pricing from contractor bid databases, factoring in material type, roof pitch complexity, tear-off requirements, and regional labor rates from BLS data. We adjust for your state's construction cost index so estimates reflect local market conditions, not just national averages.
We show you a range (low, average, high) because actual costs depend on contractor pricing, material brands, project complexity, and local market conditions. Our data covers all 50 states and is updated quarterly. For the most accurate estimate, we always recommend getting 3+ quotes from licensed local contractors.
Our estimates are within 15-20% of actual project costs for typical roofing jobs. Material choice and roof complexity (pitch, stories, access) have the biggest impact. Always get 3+ quotes from licensed roofers.
If you check "Existing roof tear-off needed," yes. Tear-off adds about $1.50 per sq ft ($2,550 for a typical 1,700 sq ft roof). Some areas allow a second layer of shingles over the existing roof, which avoids this cost.
Most residential roof replacements take 2-5 days. Metal and tile roofs take longer (5-10 days). Weather delays are common — schedule for dry periods.
Yes, in most jurisdictions. Roof replacement typically requires a building permit ($150-$500). Your contractor should pull it. Check our permit guide for your state.
If your roof is under 15 years old and damage is localized, repair is usually better ($300-$1,000). If it is over 20 years, has widespread damage, or you are seeing granules in gutters, replacement is the better investment.
Join homeowners who get free insights on project costs, permit changes, and money-saving tips. No spam — unsubscribe anytime.
Free forever. No credit card. Unsubscribe in one click.