Roof Replacement Cost 2026 — Materials, Labor, and Total Cost

How much does a roof replacement cost? Comprehensive price comparison by material: metal roofing, tile roofing, asphalt shingles, and green roofing. Calculate your roof replacement cost with AI.

What to watch when bidding a roof

Calculating roof area from a floor plan is the most common error in roofing bids. The plan view shows horizontal area, but pitch increases the actual roof area. A 4:12 (18°) pitch is about 5% larger than plan area — and a 9:12 (37°) pitch is around 25% larger. Accurate measurement comes from the cross-section or from the geometry directly.

Add-ons routinely run 30–50% on top of the roofing material itself: deck repair, underlayment, drip edge and ridge cap, snow guards, walk pads and tie-off anchors, penetrations, and the gutter system. On reroofs the existing roof tear-off and disposal need pricing too — old coal-tar-pitch roofs in some historic buildings can require hazardous-waste handling. The cheapest material isn't always cheapest over time, since lifespans range from 15 to over 50 years.

How AI Calculates Roof Replacement Cost

1

Upload Blueprints

Floor plans, cross-sections, and elevation drawings. AI calculates roof surface area including slopes.

2

AI Does Quantity Takeoff

AI identifies roof surfaces, eaves, ridges, valleys, and penetrations. Calculates the actual surface area.

3

Select Materials

Choose roofing material, add substructure and accessories. AI calculates material quantities.

Roof Replacement Cost by Material 2026

Material + installation, excluding tear-off and decking.

MaterialPriceLifespan
Metal roof (standing seam)$12–18 /sqft40–50 years
Metal roof (corrugated/ribbed panel)$8–14 /sqft30–40 years
Concrete tile roof$10–18 /sqft40–50 years
Clay tile roof$15–25 /sqft50–100 years
Architectural asphalt shingle$5–9 /sqft20–30 years
Flat roof (TPO/EPDM membrane)$6–12 /sqft15–25 years
Green roof$15–30 /sqft30–50 years

Additional Costs

Tear-off of existing roof$1–2 /sqft
Underlayment$0.50–1.50 /sqft
Drip edge$2–5 /lf
Roof safety accessories (snow guards, ice and water shield)$5–12 /lf
Penetrations (chimney, vent stacks)$200–500 /ea
Gutters and downspouts$8–15 /lf

Manual roof area calculation is error-prone. AI calculates it from blueprints in seconds.

Try AI quantity takeoff

Frequently asked questions about roofing bids

How much does a roof replacement cost per square foot?
Material and labor combined typically: asphalt shingles $4–$8/sqft, architectural shingles $5–$10/sqft, standing-seam metal $10–$20/sqft, clay tile $15–$30/sqft, slate $20–$40+/sqft. Add deck and underlayment ($1.50–$3.00/sqft), edge metal, and gutters. A typical 1,800 sqft home reroof runs $12,000–$30,000 turn-key.
Do I need a permit for a roof replacement?
A like-for-like reroof usually doesn't need a permit. Switching material types (asphalt → metal, e.g.), changing roof shape, or adding skylights generally requires a permit. Historic structures need approval for any roof change. Always check the local building department.
Which roofing material is cheapest long-term?
Asphalt shingles look cheapest up front ($4–$8/sqft) but a 20–25 year lifespan means they get replaced 2–3 times over the life of a standing-seam metal roof. On a per-year basis, standing-seam metal ($10–$20/sqft, 40–50 years) and clay tile ($15–$30/sqft, 50+ years) often win. Annualized cost lands around $0.30–$0.50/sqft/year for either.
How is roof area calculated from blueprints?
The floor plan shows the horizontal projection. Actual roof area = plan area / cos(pitch angle). Example: 1,000 sqft footprint, 4:12 pitch (18.4°) → actual area 1,000 / cos(18.4°) = 1,054 sqft. Add eaves, hips, and valleys. Massoi calculates this automatically using the pitch from the cross-section.
What add-ons should I price into a roofing bid?
Typical add-ons: deck/sheathing repair $1.50–$3/sqft, underlayment $0.30–$0.80/sqft, drip and ridge metal $1.50–$3/lf, snow guards and roof anchors $2–$4/lf, penetrations (chimney, vent stacks) $100–$300 each, gutters and downspouts $8–$15/lf. Tear-off and disposal of the old roof runs $1–$3/sqft. Combined add-ons can lift the bid 30–50%.

See Also

Bid Estimation

AI-powered bid estimation for all trades

Foundation Bid Estimation

Foundation work cost estimation

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