Roofing Cost Calculator
Estimate your roof replacement cost based on roof area, material type, pitch, and number of stories. Includes material, labor, and old roof removal costs.
Enter your roof details above and click Calculate.
Roofing Material Comparison
| Material | Cost/Square | Lifespan | Best For |
|---|---|---|---|
| Asphalt Shingles | $300-$500 | 20-30 years | Budget-friendly, most common |
| Metal Roofing | $600-$900 | 40-70 years | Durability, energy efficiency |
| Tile Roofing | $800-$1,200 | 50-100 years | Hot climates, aesthetics |
| Slate Roofing | $1,200-$2,000 | 75-150 years | Luxury, maximum lifespan |
Understanding Roofing Costs
Roofing costs are measured in "squares" -- one roofing square covers 100 square feet of roof area. The total cost of a roof replacement depends on several factors: the material you choose, the complexity of your roof (pitch and number of stories), whether old shingles need to be removed, and your geographic location. Labor typically accounts for 40-60% of the total project cost.
Steep roofs require additional safety equipment and take longer to install, increasing labor costs by 15-35%. Multi-story homes add 10-25% to labor costs due to the extra height and difficulty of moving materials. Most contractors include a 10% waste factor in their estimates to account for cuts, breakage, and overlap.
When to Replace Your Roof
Signs you may need a new roof include: curling or missing shingles, granule loss in gutters, daylight visible through roof boards, sagging roof deck, and a roof that is approaching its expected lifespan. Most asphalt shingle roofs last 20-30 years, while metal and tile roofs can last 50 years or more. Regular inspections (especially after major storms) can help you catch problems early and extend your roof's life.
Frequently Asked Questions
How many squares is my roof?
A roofing square equals 100 square feet. To estimate your roof area, multiply your home's footprint by a pitch factor (1.0 for flat roofs, 1.12 for moderate pitch, 1.3 for steep pitch). For example, a 1,500 sq ft footprint with moderate pitch is about 1,680 sq ft, or 16.8 squares. For an exact measurement, a roofing contractor can measure from the roof itself.
Asphalt vs metal roofing: which is better?
Asphalt shingles cost less upfront ($350/square vs $700/square) and are easier to install, making them the most popular choice. Metal roofing costs more initially but lasts 2-3 times longer (40-70 years), is more energy-efficient, and better withstands high winds and hail. Over a home's lifetime, metal roofing can be more cost-effective despite the higher upfront investment.
How long does a roof last?
Asphalt shingles typically last 20-30 years, metal roofs 40-70 years, tile roofs 50-100 years, and slate roofs 75-150 years. Climate, maintenance, ventilation, and installation quality all affect lifespan. Regular inspections and prompt repairs can extend any roof's life significantly.
Do I need a permit for a new roof?
Most states and municipalities require a building permit for roof replacement. The permit ensures the work meets local building codes, which is especially important in areas prone to hurricanes, heavy snow, or wildfires. Your contractor should handle the permitting process. Permit costs typically range from $100 to $500 depending on your location.