Estimate the total cost of your roof replacement or installation.
Include overhangs and garage.
Flat (0/12 – 2/12)
Standard (3/12 – 6/12)
Steep (7/12 – 9/12)
Very Steep (10/12+)
3-Tab Asphalt Shingles (Economy)
Architectural Shingles (Standard)
Metal Roofing (Premium)
Slate or Clay Tile (Luxury)
1 Story
2 Stories
3+ Stories
Estimated Project Total
Estimated Materials: Estimated Labor:
*This is an estimate based on national averages. Local permit fees, waste disposal, and structural repairs are not included.
function calculateRoofCost() {
var area = parseFloat(document.getElementById('roofArea').value);
var pitchMultiplier = parseFloat(document.getElementById('roofPitch').value);
var materialBasePrice = parseFloat(document.getElementById('materialType').value);
var storyMultiplier = parseFloat(document.getElementById('stories').value);
var resultDiv = document.getElementById('roofResult');
if (isNaN(area) || area <= 0) {
alert("Please enter a valid roof square footage.");
return;
}
// Calculations
// Base material cost = area * base price * pitch (more waste on steep roofs)
var materialTotal = area * materialBasePrice * (pitchMultiplier * 0.9);
// Labor cost = area * average labor ($3.00/sqft) * height factor * pitch factor
var laborBase = 3.50;
var laborTotal = area * laborBase * storyMultiplier * pitchMultiplier;
var grandTotal = materialTotal + laborTotal;
// Display results
document.getElementById('totalCost').innerText = "$" + grandTotal.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('materialCost').innerText = "$" + materialTotal.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('laborCost').innerText = "$" + laborTotal.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
resultDiv.style.display = 'block';
resultDiv.scrollIntoView({ behavior: 'smooth', block: 'nearest' });
}
Understanding Roof Replacement Costs
Replacing a roof is one of the most significant investments a homeowner will make. While the average national cost ranges between $5,500 and $12,000, your specific price depends on several architectural and geographical factors.
Key Factors Affecting Your Estimate
Square Footage: Roofing is often priced by the "square" (a 10×10 foot area, or 100 square feet). Larger roofs require more materials and more man-hours.
Pitch and Slope: A steep roof is more dangerous for crews to work on and requires specialized safety equipment. This increases labor costs significantly compared to a walkable, low-slope roof.
Material Choice: Asphalt shingles are the most common and cost-effective. However, premium materials like metal or slate can last 50+ years but come with a much higher upfront price tag.
Layers: If your existing roof has multiple layers of shingles, contractors must charge more for the "tear-off" and disposal of the old materials.
Example Cost Breakdown
Imagine a 2,000-square-foot ranch-style home with a standard pitch:
Component
Estimated Range
Architectural Shingles
$7,000 – $9,500
Standing Seam Metal
$18,000 – $25,000
Labor (Standard Installation)
$3,000 – $5,000
How to Save on Your New Roof
To get the best value, schedule your replacement during the "off-season" (late winter or early spring in many climates). Always get at least three quotes and verify that each contractor is licensed and carries workers' compensation insurance to avoid liability for accidents on your property.