How much does a new roof cost per square?

It varies with material and access — enter your prices.

What does tear-off add?

Typically $100–$200 per square depending on layers.

Usually yes for a re-roof — check your building department.

How much does a new roof cost?

It depends on material and deck condition — enter your prices.

Tear-off reveals damage and is often required with two layers already.

How long does a re-roof take?

One to three days for a typical house with asphalt shingles.

Roofing cost calculator

Roof area and your prices for material, labor, tear-off and extras: you get the total cost and cost per area.

Purchase quantity

1291.669 ft²

Net measurement: 1291.669 ft²

Roofing material1291.669 ft² · $3,000.00
Labor1291.669 ft² · $2,400.00
Tear-off of existing roof1291.669 ft² · $960.00
Extras (scaffold, flashing, dumpster)1 unit · $300.00
Cost per m²10.764 ft² · $55.50

Indicative estimate: $6,660.00

Use my prices

Your prices per language/currency. Used when you enable “Use my prices” in calculators. My prices →

Calculate labor, margin & tax

How it's calculated (visible formula)

cost = area × (material + labor + tear-off) + extras

Net geometric measurement, no waste.
Adjustable waste % for cuts and breakage.
Purchase rounded up to sellable units (boxes, bags, buckets, boards).

See methodology and formula versions

How to calculate it, step by step

Work out true roof area.
Enter your material, labor and tear-off prices.
Add scaffolding, dumpster and flashing as extras.
Review total and cost per square.
Add margin and tax on the quote.

Worked example: 1,290 sq ft (120 m²) at $25 + $20 + $8 per m², $300 extras

120 × $53 = $6,360
+ $300 = $6,660

→ $6,660 (about $516 per square).

Common mistakes

Forgetting scaffolding or lifts.
Leaving out disposal fees.
Pricing from footprint area.

Pro tips

Inspect the deck first — rotten sheathing adds cost.
Price disposal separately.
Offer material options with their lifespan.
Define in the contract how hidden damage is handled.

From calculation to quote

Add labor, overhead and your margin, and generate the professional PDF.

Create quote Calculate margin & tax

FAQs

How much does a new roof cost per square?: It varies with material and access — enter your prices.
What does tear-off add?: Typically $100–$200 per square depending on layers.
Do I need a permit?: Usually yes for a re-roof — check your building department.
How much does a new roof cost?: It depends on material and deck condition — enter your prices.
Overlay or tear-off?: Tear-off reveals damage and is often required with two layers already.
How long does a re-roof take?: One to three days for a typical house with asphalt shingles.

Sources and standards

Maintained by Srikanta M · Formula v1.0.0 · Verified 2026-09-10 · Updated 2026-09-10 · Limits: quantity estimation, not structural design or site supervision.