Roof Replacement Cost Calculator

Wondering how much it costs to replace a roof on your home? A full tear-off and reroof typically runs between $5,500 and $30,000 for a single-family house, with most homeowners spending around $9,000 to $15,000 for asphalt shingles on a 2,000 sq ft footprint. The total depends on roof size (measured in squares, where 1 square = 100 sq ft), material choice, pitch, tear-off complexity, and your regional labor market. For example, a 25-square roof at $450 per square in materials and labor lands near $11,250 before permits.

This calculator combines your roof's measured area, material tier, pitch difficulty, and local labor rate to produce a realistic budget range. We also factor in tear-off of old layers, underlayment, flashing, and a contingency for hidden deck repairs (commonly 5–15% of the base estimate). A homeowner with a 2,400 sq ft steep-pitch roof choosing architectural shingles in a high-cost metro may see $18,000–$22,000, while the same home with 3-tab shingles in a low-cost region could be $9,500–$12,000.

How it works: Enter your roof area, pick a material and pitch, set local labor rate and tear-off layers, then review the cost range, per-square cost, and personalized insights.

Roof Replacement Costs in 2026: What Drives the Price

Replacing a roof is one of the largest home maintenance projects most owners face. Understanding the cost drivers—materials, pitch, tear-off, and labor market—lets you budget realistically and avoid surprises during bidding.

Typical installed cost by roofing material (per square, 100 sq ft)

Regional cost adjustments (vs. national average)

How roof size is actually measured

Roofers price work in 'squares,' where 1 square equals 100 square feet of roof surface—not house footprint. A 2,000 sq ft single-story home with a medium pitch typically has 2,400–2,600 sq ft of roof, or 24–26 squares. Multiply your home's footprint by about 1.15 for low pitch, 1.3 for medium, and 1.4+ for steep. A rule of thumb: always pay for measured area, not estimated. Reputable contractors use satellite tools (EagleView, HOVER) and confirm with on-roof measurement during the bid.

Material is the biggest single cost driver

Materials account for 35–50% of total project cost. Architectural asphalt shingles—the default for most US homes—run $2–$3.50 per sq ft for materials alone. Metal jumps to $7–$10/sq ft, tile $8–$12, and slate $15+. A guideline: if you plan to stay in the home less than 10 years, premium materials rarely pay back at sale. If you'll stay 20+ years, upgrading from 3-tab to architectural shingles costs ~$2,000 more but lasts 10+ years longer, often a better lifetime-cost choice.

Why pitch and complexity raise labor

Roofs steeper than 6/12 require harnesses, roof jacks, and slower foot movement, adding 10–25% to labor. Anything over 10/12 may need scaffolding, which can add $1,500–$4,000. Complexity—dormers, skylights, valleys, chimneys—adds flashing work and waste cuts. A simple gable on a ranch might install in 1–2 days; a cut-up Victorian with three dormers and two chimneys can take a week. Rule of thumb: each major penetration (skylight, chimney) adds roughly $200–$500 in flashing labor and materials.

Tear-off, decking, and the hidden 10–15%

Most jurisdictions allow a maximum of two shingle layers; a third requires full tear-off. Tearing off one layer typically costs $0.75–$1.25 per sq ft, plus $400–$800 in dumpster fees. The hidden cost is decking: about 1 in 5 roofs need plywood replacement once opened up, at $70–$120 per 4×8 sheet installed. Build a 10–15% contingency into your budget. Homes older than 25 years, or with prior leak history, should plan for 15–20% contingency to absorb rotted decking and rusted flashing.

Labor markets and timing

Labor is 40–55% of total cost. National average installed labor runs $2.50–$4.00 per sq ft, but high-cost metros routinely hit $5–$7. Off-season (late fall, winter in mild climates) often saves 5–10% as crews fill gaps. Avoid post-storm peak demand: after a major hailstorm, prices commonly spike 15–25% and quality drops. Rule of thumb: get 3 written bids, reject the lowest and highest, and verify the middle bidder's license, insurance certificate, and at least 3 recent local references before signing.

Permits, warranties, and what to verify

Permits cost $150–$1,000 depending on jurisdiction—usually $300–$500 for a typical reroof. Always pull a permit; unpermitted work can derail home sales. Material warranties run 25–50 years but require manufacturer-certified installers for the full coverage. Labor warranties from contractors typically run 5–10 years; anything less than 5 is a red flag. Verify: contractor license, $1M+ liability insurance, workers' comp, manufacturer certification, and a written contract specifying brand, color, underlayment, ice-and-water shield coverage, and cleanup terms including a magnetic sweep for nails.

How This Calculator Works: Methodology & Parameter Explanations

Core formula: areaSqft = area (converted from sq m if needed) • subtotal = (areaSqft × materialCost + areaSqft × laborRate × pitchFactor + areaSqft × 0.9 × tearOffLayers) × regionFactor × complexityFactor • total = subtotal + permits (≈$350 + $0.05/sq ft) + 10% contingency.

Parameter explanations

Assumptions

Material costs in the model are 2026 US averages; your local supplier pricing may vary ±20%.

All headline example numbers (e.g., $9,000–$15,000 for a 2,000 sq ft roof) are illustrative defaults, not hard-coded limits—the calculator computes from your actual inputs.

A 10% contingency is automatically added for hidden decking repairs; raise this to 15–20% for roofs over 25 years old.

Permit fees use an approximation of $350 + $0.05/sq ft; verify with your local building department.

Pitch factor applies only to the labor component, not materials or tear-off.

Parameter meanings