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Professional Roofing Cost Calculator

Estimate your roof replacement costs based on square footage and materials.

Flat to Low (1/12 – 3/12) Standard (4/12 – 6/12) Steep (7/12 – 9/12) Very Steep (10/12+)

Asphalt Shingles (Basic) Architectural Shingles Standing Seam Metal Clay/Concrete Tile Natural Slate

Simple (Gable, few vents) Moderate (Valleys, chimney) Complex (Many levels, dormers)

Estimated Project Total

$0.00

Price per Square (100 sq ft):

Estimated Material Cost:

Estimated Labor/Complexity:

*Disclaimer: This is a rough estimate. Local labor rates, tear-off fees, and permit costs vary by location.

How to Estimate Your Roofing Costs

Replacing a roof is one of the most significant investments a homeowner will make. Understanding the factors that influence the final quote helps you budget effectively and negotiate with contractors. Our roofing calculator uses four primary variables to generate a realistic price range.

Key Factors Influencing Roof Pricing

• Total Square Footage: Roofing is measured in "squares," where one square equals 100 square feet. A 2,000 sq ft home doesn't necessarily have a 2,000 sq ft roof; pitch and overhangs increase the actual surface area.
• Roof Pitch (Slope): Steeper roofs are more expensive. They require specialized safety equipment, more labor time, and different underlayment techniques compared to flat or low-slope roofs.
• Material Choice:
  • Asphalt Shingles: The most common and cost-effective option ($4.00 – $7.00 per sq ft).
  • Metal Roofing: Extremely durable and energy-efficient ($10.00 – $16.00 per sq ft).
  • Slate and Tile: Premium materials with 50-100 year lifespans but high weight and installation costs ($15.00+ per sq ft).
• Complexity: Chimneys, skylights, valleys (where two roof planes meet), and dormers add to the labor hours and required flashing materials.

Example Calculation

If you have a 2,500 sq ft roof area with a standard pitch (1.15 multiplier) using Architectural Shingles ($6.50 base):

Area (2,500) × Pitch (1.15) = 2,875 effective sq ft.
2,875 sq ft × $6.50 base rate = $18,687.50 base cost.
With moderate complexity (+15%), total estimate = $21,490.62.

Hidden Costs to Consider

Our calculator provides a solid baseline, but remember to ask your contractor about "Tear-off" fees (removing the old roof), decking repairs (replacing rotten wood found after removal), and local waste disposal fees.