FREE CALCULATOR
Estimate roofing costs by size, pitch, and material type.
How much does roof replacement cost?
Roof replacement typically costs $8,000–$25,000 for an average home. Asphalt shingles are the most affordable; metal and specialty materials cost significantly more.
How many squares of roofing do I need?
One roofing square = 100 sqft. Add 10–15% for waste, starter strips, and hip/ridge areas. Our calculator handles the math.
What is roof pitch and how does it affect cost?
Roof pitch (rise/run ratio) affects safety and labor time. Low-pitch roofs (2–4/12) are easiest to work on; steep roofs (7/12+) require harnesses and add 20–30% to labor.
How long does a new roof last?
Asphalt shingles last 20–30 years, metal roofing 40–70 years, and TPO/flat roofs 15–25 years with proper maintenance.
Do I need a permit to replace my roof?
Most jurisdictions require a permit for roof replacement. Budget $100–500 for permits and expect an inspection after installation.