Factors That Affect Roof Replacement Cost

• Labor costs: skilled labor is a major portion of the bill and varies by region and crew expertise.
• Roof size: larger roofs require more materials and more labor hours.
• Shape and complexity: hips, valleys, dormers, and steep pitches raise time on task and safety measures.
• Materials: asphalt shingles are budget friendly, while metal, tile, and slate cost more and last longer.
• Features: skylights, chimneys, and vents require additional flashing and detail work.
• Tear off and disposal: removing old roofing and hauling debris adds cost. Most contractors place a dumpster on site.

How to Calculate Your Roof Replacement Cost

Step 1: Find the ground dimensions

Measure the length and width of each section of your home and add the areas together. If the footprint is 50 ft by 30 ft, your ground area is 1,500 sq ft.

Step 2: Understand roof pitch

Pitch is rise over 12 inches of run. Low pitch is less than 6 inches, medium pitch is 6 to 9 inches, high pitch is more than 9 inches. Pitch affects total surface area and labor difficulty.

Step 3: Adjust for pitch

• Low pitch: total squares × 1.06
• Medium pitch: total squares × 1.20
• High pitch: total squares × 1.36

Step 4: Determine material costs

• Asphalt shingles: $100 to $200 per square
• Metal roofing: $300 to $900 per square
• Clay or concrete tile: $600 to $1,500 per square
• Slate: $1,000 to $3,000 per square

Step 5: Factor in labor

Labor for asphalt shingle replacement often ranges from $1.50 to $3.50 per square foot. Premium materials and steep pitches cost more. Repairs to decking, difficult access, and extensive detail work add time and cost.

Step 6: Add disposal fees

Plan for dumpster rental and disposal. Many projects see $300 to $600 for debris handling. Some contractors include this in the base price.