To estimate roofing costs, you need to measure your roof size, choose your materials, and get quotes from local contractors. Most roof replacement costs fall between $5,868 and $13,217, but prices vary based on where you live and what materials you pick. Understanding these numbers helps you budget and find fair prices. This guide shows you how to estimate like a pro, even if you have never done it before.
What Size Is Your Roof?
First, measure your roof in square feet. Roofers use a unit called a “square,” which equals 100 square feet. The average U.S. roof size is 2,647 square feet, or about 26.47 squares, according to the National Association of Home Builders.
You can estimate from the ground using your home’s footprint. Multiply your home’s length by its width. Then add extra for slope and overhang. A steep roof needs more material than a flat one.
If your roof is 1,700 square feet, costs range from $6,800 to $68,000 depending on materials, according to RubyHome (2025).
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Which Materials Cost What?
Material prices vary a lot. Basic asphalt shingles run $4.25 to $4.95 per square foot. Metal roofing costs $10 to $17.05 per square foot. Slate tiles jump to $12 to $22 per square foot.
According to RubyHome (2025), roof installation costs range from $4 to $40 per square foot total, including labor.
| Material Type | Cost Per Sq. Ft. | Lifespan |
|---|---|---|
| Basic asphalt shingles | $4.25-$4.95 | 20 years |
| Metal roofing | $10.00-$17.05 | 40-80 years |
| Slate tiles | $12.00-$22.00 | 60-150 years |
What Do Contractors Charge?
The average roof replacement costs $9,526, according to RubyHome (2025). Most projects fall between $5,868 and $13,217.
Labor is the biggest part of your bill. According to the U.S. Bureau of Labor Statistics, roofers earn a median of $24.05 per hour, which adds up fast on large jobs.
Get at least three quotes. Each contractor should visit your home, measure your roof, and give you a written estimate with materials and labor costs listed separately.
Why Prices Differ
Your roof’s pitch (slope) affects cost. Steep roofs need more safety gear and time. Accessibility matters too. A roof that is hard to reach costs more than one near the ground.
Weather and location change prices. Florida roofers charge less than Massachusetts roofers. According to the U.S. Bureau of Labor Statistics (May 2023), Massachusetts roofers average $72,390 per year, while Florida roofers average $47,030.
Material shortages also impact cost. Since 2020, roofing material costs have risen 35%, according to Cladco. Rush orders cost even more.