Permanent Mortgage Rate Buydown Calculator

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Professional Roofing Cost Estimator

Include garage and porches.
Flat / Low Slope (0:12 – 3:12) Standard (4:12 – 6:12) Steep (7:12 – 9:12) Very Steep (10:12+)
Asphalt Shingles (Basic) Architectural Shingles (Premium) Metal Roofing Concrete Tile Slate / Natural Clay Wood Shakes
Simple (Gable, few valleys) Moderate (Dormers, chimneys) Complex (Multiple levels, skylights)

Estimate Summary

Total Roof Squares:
0
Material Cost:
$0.00
Labor & Complexity:
$0.00
Removal Fees:
$0.00
Total Estimated Cost:
$0.00

*This is a preliminary estimate. Actual quotes from contractors may vary based on local market rates and specific site conditions.

How to Estimate Your Roofing Project Costs

Replacing a roof is one of the most significant investments a homeowner will make. Understanding the variables involved in your roofing estimate can help you budget effectively and negotiate with contractors. This calculator uses "Squares" as the primary unit of measurement (1 Square = 100 square feet).

Key Factors Influencing Roof Cost

  • Roof Size: Measured in square feet, but pros talk in squares. A 2,000 sq. ft. roof is 20 squares.
  • Material Choice: Asphalt shingles are the most common and budget-friendly. Premium materials like metal or slate can double or triple the material cost but offer much longer lifespans.
  • Pitch (Slope): Steep roofs require more safety equipment and move slower, increasing labor costs.
  • Complexity: A simple "Up and Over" gable roof is cheaper than a roof with multiple valleys, hips, dormers, and skylights.
  • Tear-off: Removing one or two layers of existing shingles requires labor and debris disposal fees (dumpsters).

Material Price Comparison Table (Per Square)

Material Avg. Price (per sq) Lifespan
3-Tab Shingles $350 – $450 15-20 Years
Architectural Shingles $500 – $700 25-30 Years
Metal Panels $800 – $1,200 50+ Years
Slate $1,500 – $2,500 75-100 Years

Calculation Example

If you have a 2,500 sq. ft. roof with architectural shingles and standard complexity:

  1. Squares: 25 squares.
  2. Material: 25 x $650 = $16,250.
  3. Labor: Base labor often ranges from $200-$400 per square.
  4. Total: Often lands between $18,000 and $24,000 depending on your specific region.
function calculateRoofCost() { var rawArea = parseFloat(document.getElementById('roofArea').value); var pitchMultiplier = parseFloat(document.getElementById('roofPitch').value); var materialPrice = parseFloat(document.getElementById('materialType').value); var complexityFactor = parseFloat(document.getElementById('complexity').value); var removalChecked = document.getElementById('removeOldRoof').checked; if (isNaN(rawArea) || rawArea <= 0) { alert("Please enter a valid roof area."); return; } // 1. Calculate actual surface area based on pitch var actualSurfaceArea = rawArea * pitchMultiplier; // 2. Convert to Squares (1 square = 100 sq ft) var squares = actualSurfaceArea / 100; // 3. Waste Factor (Add 10% for cuts and valleys) var totalSquaresWithWaste = squares * 1.1; // 4. Material Cost (per square) var totalMaterialCost = totalSquaresWithWaste * materialPrice; // 5. Labor Cost (Base labor around $250 per square, modified by complexity) var baseLaborRate = 250; var totalLaborCost = totalSquaresWithWaste * baseLaborRate * complexityFactor; // 6. Removal Cost (Approx $150 per square) var removalCost = 0; if (removalChecked) { removalCost = totalSquaresWithWaste * 150; } // 7. Total var grandTotal = totalMaterialCost + totalLaborCost + removalCost; // Display Results document.getElementById('resSquares').innerText = totalSquaresWithWaste.toFixed(1) + " Squares"; document.getElementById('resMaterial').innerText = "$" + totalMaterialCost.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('resLabor').innerText = "$" + totalLaborCost.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('resRemoval').innerText = "$" + removalCost.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('resTotal').innerText = "$" + grandTotal.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('roofResult').style.display = 'block'; }

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