Roof Replacement Cost Calculator
Estimated Cost Breakdown
Total Surface Area: sq ft
Material Cost:
Labor & Complexity:
Total Estimated Cost:
*Disclaimer: This is a rough estimate. Local permits, tear-off fees, and regional price variations are not included.
How Much Does a New Roof Cost? A Complete Guide
Replacing a roof is one of the most significant investments a homeowner can make. Understanding how professional contractors calculate quotes is essential for budgeting and comparing bids. Our Roofing Cost Calculator uses industry-standard variables to provide a realistic ballpark figure for your project.
Key Factors That Influence Roofing Prices
1. Roof Square Footage vs. Ground Square Footage
Many homeowners mistakenly use the square footage of their home's interior to estimate roof size. However, because of the "pitch" (slope) and overhangs (eaves), the roof surface area is always significantly larger than the footprint of the house. A "square" in roofing terminology refers to 100 square feet.
2. Material Choice
Materials represent roughly 40% to 50% of the total cost. Here is a breakdown of common options:
- Asphalt Shingles: The most common and affordable option, durable for 20-30 years.
- Architectural Shingles: Thicker, multi-dimensional shingles that offer better wind resistance and aesthetic appeal.
- Metal Roofing: Extremely durable (50+ years) and energy-efficient, though higher in initial cost.
- Slate and Tile: Premium materials that can last a century but require reinforced roof structures due to their weight.
3. Pitch and Complexity
A "flat" roof is easier and safer to walk on, reducing labor costs. Conversely, a steep roof requires specialized safety equipment and more man-hours. Complexity—such as the number of valleys, dormers, chimneys, and skylights—also increases the labor rate because of the extra flashing and cutting required.
Realistic Example Calculation
Let's look at a standard 2,000 sq ft roof (surface area):
| Component | Details | Estimated Cost |
|---|---|---|
| Materials | Architectural Shingles ($8.25/sqft) | $16,500 |
| Labor | Moderate Complexity ($4.00/sqft) | $8,000 |
| Total Estimate | Standard Pitch | $24,500 |
Hidden Costs to Watch For
While our calculator covers the primary costs, keep a "contingency fund" of 10-15% for the following:
- Decking Repair: If the wood underneath is rotted, it must be replaced.
- Tear-off Fees: Removing and disposing of old shingles can cost $1,000–$3,000.
- Permits: Local municipal fees vary by city and state.