Professional Roofing Cost Estimator
Estimated Replacement Cost:
*Includes estimated labor, materials, and disposal based on your inputs.
How to Estimate Your Roofing Costs
Replacing a roof is one of the most significant investments a homeowner will make. Understanding the variables that drive the price can help you budget effectively and negotiate with contractors. Our calculator uses four primary data points to provide a realistic estimate for a full replacement.
1. Roof Area (The "Square")
Roofing contractors measure roofs in "squares." One square equals 100 square feet. If your home's footprint is 1,500 square feet, your roof area will likely be higher due to overhangs and the slope of the roof. Always account for a 10-15% waste factor for shingles.
2. Pitch and Complexity
A steep roof is more dangerous and difficult to work on. It requires specialized safety equipment and more man-hours. A roof with a "steep pitch" (10/12 or higher) can increase labor costs by 20% to 40% compared to a flat or low-sloped roof.
3. Material Selection
Material is the largest variable in your total cost. Asphalt shingles are the most common and affordable, ranging from $4.00 to $7.00 per square foot installed. Premium materials like metal, tile, or slate provide much higher durability and lifespan (50+ years) but come with a significantly higher upfront price tag.
4. Tear-Off and Disposal
Removing your old roof (tear-off) typically costs between $1.00 and $2.00 per square foot. While some local codes allow for an "overlay" (placing new shingles over old ones), most experts recommend a full tear-off to inspect the decking for rot or water damage.
Example Calculation
Suppose you have a 2,000 sq ft roof with a medium pitch using Architectural Shingles:
- Base Material & Labor: 2,000 sq ft × $7.00 = $14,000
- Pitch Adjustment: $14,000 × 1.25 multiplier = $17,500
- Tear-Off: 2,000 sq ft × $1.50 = $3,000
- Total Estimated Cost: $20,500