Start with the right area
Use the ground-floor footprint requested by this calculator. A two-story home’s total living area is not its footprint. Pitch, roof shape and waste are separate inputs; do not add them twice.
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Roof replacementRoof replacement cost calculator and estimate
Estimate a new roof from footprint, pitch, material, tear-off and regional assumptions. See itemized costs, then compare an illustrative insurance payout for covered damage. A house floor area is not the same as roof area.
Reviewed 25 October 2026 · Written by Mantu Kumar
See the illustrated project guide
Written and maintained by Mantu Kumar
Evidence review4 August 2026
Calculation rulesRead the methodology
Quality standardEditorial policy
2026 planning ranges
- 1Tear-off, one layer · $2,100–$3,900
- 2Rotten OSB sheets · ~$580–$970 at 10%
- 3Ice & water shield at the eave
- 4Synthetic underlayment
- 5Architectural shingles · $400–$600 / sq
- 6Ridge vent, boots + permit
- 7Drip edge + flashing
- 8Second layer tear-off
- 9Steep pitch + height
Roof replacement cost estimate
No email · nothing sentDiagram, part by part
Roof replacement: every numbered part explained
The roof replacement drawing above has 9 numbered parts, from Tear-off, one layer to Steep pitch and two stories. Each card below frames one of them, and after you run the calculator it shows what that part adds to your estimate.
1Tear-off, one layer
$2,100–$3,900
The crew strips the old shingles and underlayment down to the deck and hauls them away. One layer is the baseline; every extra layer adds labor, dump weight and often a second dumpster.
On the quote: Ask how many layers they found when they looked, and whether a second layer is already priced or would be a change order.
2Rotten OSB sheets
~$580–$970 at 10%
Decking is the plywood or OSB the shingles are nailed to. Nobody can see rot until the old roof is off, so good contracts price it per sheet rather than guessing a total.
On the quote: Get the per-sheet price in writing and a promise to photograph every replaced sheet.
3 Ice & water shield at the eave
Part of the materials
A rubberized membrane laid along the eaves and in valleys seals around nails where ice dams back water up. Many northern codes require it from the edge to 24 inches inside the warm wall.
What moves it: Climate, eave length and the number of valleys.
On the quote: Check that the quote names the eave width covered and includes the valleys.
4 Synthetic underlayment
Part of the materials
Synthetic underlayment covers the rest of the deck as a second water barrier under the shingles. It is light, tear-resistant and the default on almost every reroof today.
What moves it: Roof area and the product chosen.
On the quote: Make sure it covers the whole deck, not only the lower courses.
5Architectural shingles
$400–$600 / sq
The shingles themselves, priced per square of 100 square feet. Architectural shingles cost more than three-tab but carry longer warranties and higher wind ratings.
On the quote: Compare squares with waste included; 10% to 15% is normal on a simple gable.
6 Ridge vent, pipe boots and permit
Permit $200–$550
The small parts that keep a roof watertight: the ridge vent, pipe boots, flashing details and the building permit. They are cheap individually and are where low bids cut corners.
On the quote: Look for new pipe boots and new drip edge, not ‘reuse existing’.
7 Drip edge and flashing
Part of a full replacement
Metal drip edge at the eaves and rakes guides water into the gutter and protects the deck edge. Step flashing at walls and new counter-flashing at chimneys are where most roof leaks start.
What moves it: Eave length, walls and chimneys on the roof.
On the quote: Ask for new drip edge and step flashing rather than reusing the old metal.
8 Extra layers to remove
Adds labor and dump fees
Many older roofs have a second layer of shingles over the first. Each extra layer adds tear-off labor, weight in the dumpster and disposal fees, and most codes allow no more than two layers.
What moves it: How many layers are on the roof now.
On the quote: Ask how many layers were found and whether extra layers are priced or a change order.
9 Steep pitch and two stories
Raises labor
Roofs steeper than about 8/12 need roof jacks and harnesses, and two- or three-story homes need more ladder and safety setup. Both slow the crew and raise labor per square.
What moves it: Roof pitch, stories and how easy it is to reach.
On the quote: Ask whether steep or high sections are priced at a higher rate.
A closer look at your project
See what a roof estimate needs to include
The visible roof covering is only one part of a replacement project. Use the photograph to connect the roof you can see with the scope you need to price.
Three parts of the same picture, each tied to a line on a roof estimate. These close-ups are crops of the same AI-generated illustration.
Look beyond the shingles
Ask whether the price includes removing old layers, underlayment, flashing, roof-edge work and disposal. The surface material alone does not describe a complete replacement.
Leave room for hidden decking
Damaged decking may only become clear when the covering is removed. Ask how extra sheets or repair areas would be measured, authorized and charged.
Before comparing totals, ask for these details
- Roof covering
- Material, product range and written warranty terms
- Removal and preparation
- Number of existing layers, disposal and decking allowance
- Edges and drainage
- Flashing, gutters and any separately quoted work
On this page
Why roofers price by the square, and why it matters to you
A roofing square is 100 square feet of roof surface. Every quote you receive is built on that unit, which is why two houses with identical floor plans can be quoted thousands apart.
The catch is that your roof is bigger than the house underneath it. A roof rising 6 inches for every 12 inches of run has 11.8% more surface than its footprint. At 12:12 it has 41% more. Add waste for cuts around valleys and dormers and a 1,800 sq ft footprint becomes roughly 23 squares of material. To work out your own number, use the roof area calculator.
| Pitch | Area multiplier | Walkable? |
|---|---|---|
| 2:12 — nearly flat | 1.014 | Yes |
| 4:12 — gentle | 1.054 | Yes |
| 6:12 — typical | 1.118 | With care |
| 8:12 — above average | 1.202 | Harnesses needed |
| 10:12 — steep | 1.302 | No |
| 12:12 — very steep | 1.414 | No |
Checking a quote in ten seconds
Divide the quoted total by the number of squares. If a contractor is charging $1,400 a square
for architectural asphalt, either something unusual is going on or you want a second quote.
Roof replacement cost by house size
Architectural asphalt, 6:12 pitch, one layer torn off, national average labor. Adjust for your own situation with the calculator above.
| Footprint | Squares | Typical range |
|---|---|---|
| 1,000 sq ft | 12.9 | $6,800 – $11,000 |
| 1,200 sq ft | 15.4 | $8,100 – $13,100 |
| 1,500 sq ft | 19.3 | $10,100 – $16,200 |
| 1,800 sq ft | 23.1 | $12,100 – $19,300 |
| 2,000 sq ft | 25.7 | $13,400 – $21,400 |
| 2,500 sq ft | 32.1 | $16,800 – $26,700 |
| 3,000 sq ft | 38.6 | $20,100 – $31,900 |
Every size worked through in detail — including how to measure your footprint from the ground, and why two contractors can quote different square counts on the same house.
Cost by material, and the lifespan that goes with it
Material choice does two things at once: it sets the price today, and it sets the depreciation schedule your insurer will use for the next few decades. A cheap roof is depreciated faster, so it is worth less at claim time as well as lasting less long.
| Material | Per square, installed | Expected life |
|---|---|---|
| 3-tab asphalt shingle | $300 – $500 | 20 yrs |
| Architectural asphalt | $400 – $600 | 28 yrs |
| Class 4 impact-resistant shingle | $550 – $900 | 32 yrs |
| TPO, low-slope membrane | $450 – $850 | 22 yrs |
| Modified bitumen, low-slope | $400 – $750 | 20 yrs |
| Corrugated metal | $500 – $900 | 45 yrs |
| Cedar shake | $700 – $1,300 | 30 yrs |
| Standing seam metal | $800 – $1,600 | 50 yrs |
| Clay or concrete tile | $1,000 – $2,000 | 55 yrs |
| Natural slate | $1,500 – $3,000 | 80+ yrs |
ACV roof endorsements
An actual-cash-value roof endorsement is not its own calculator and it is not a discount. It changes what a covered roof claim pays. Replacement cost pays to replace the roof, usually after the work is done and you claim the recoverable depreciation. An ACV roof endorsement pays the depreciated value. On an older roof that can be a small fraction of the job, and the deductible can erase it. Many forms switch an older roof to ACV at renewal. The declarations page is the only place that rule is real for your policy. This site does not treat one carrier’s age cutoff as if it applied to every policy.
Useful lives in the calculator are illustrations for the depreciation panel. The policy’s own schedule controls a claim. Run the depreciation calculator with the age on the declarations, and read the Texas hail guide if hail is the peril. A Class 4 shingle, a metal roof, or a tile roof is not a promised premium credit. Ask the carrier for a re-quote.
The material list now includes Class 4 impact-resistant shingles, TPO, and modified bitumen, beside the metal and tile that were already there. TPO and modified bitumen are low-slope membranes. Pick a low pitch for a flat or near-flat roof. A steep-pitch labor factor still applies if you select a steep pitch. The bands were widened because 2026 public guides do not agree.
What insurance actually pays
This is where most homeowners get caught out, and it has almost nothing to do with the replacement cost itself.
First, the cause has to be covered. Hail, wind and falling trees generally are. Age, wear, poor maintenance and manufacturing defects generally are not. A roof that has simply reached the end of its life is not an insurable event, however expensive it is to replace.
Second, if the cause is covered, the amount depends on which kind of policy you hold:
| Replacement cost (RCV) | Actual cash value (ACV) | |
|---|---|---|
| First payment | Depreciated value, less deductible | Depreciated value, less deductible |
| After work is finished | Releases the withheld depreciation | Nothing further |
| Your share on an 18-year roof | Deductible only | Deductible plus the depreciation |
The trap in an ACV policy
On an older roof, depreciation can exceed the deductible several times over. A 22-year-old
architectural shingle roof is around 79% through its expected life, so an ACV policy may pay
roughly a fifth of what the replacement costs. Your premium was lower every year until the
day you needed it.
What is roof replacement cost buyback?
A buyback offer pays you a lump sum in exchange for excluding the roof from your policy going forward. Carriers use it on roofs they no longer want to insure. It is not an upgrade and it is not a settlement of a claim — after a buyback, roof damage is simply not covered. Read the endorsement before accepting one.
Why replacing a roof costs what it does
Labor is usually 50 to 60% of the bill. A crew is on your property for two to four days, working at height, carrying several tons of material up a ladder and several tons of old material back down. That is the bulk of what you are paying for.
The rest is spread across items that rarely appear in the headline number: underlayment, ice and water shield along the eaves, drip edge, ridge vent, flashing around every penetration, and disposal fees that have risen sharply. Tear-off alone runs $90 to $170 a square per layer, and HomeAdvisor puts total removal and disposal at $1,500 to $4,500.
Then there is the item nobody can quote accurately: the decking underneath. Its condition is unknown until the old roof comes off. Assume around 10% will need replacing and treat anything less as a good outcome.
Related guides
- Roof damage: what to do first — the first 24 hours, documenting the loss, and whether the claim is worth filing
- Texas roof cost and insurance guide — regional planning, wind or hail deductibles, contractor law and coastal windstorm checks
- Roof cost by square footage — every size from 1,000 to 4,000 sq ft, worked through
- Roof area calculator — squares, pitch, waste and shingle bundles to order
- Repair or replace calculator — whether a repair is worth it on an older roof
- Roof repair calculator — a patch, pipe boots, one valley or a tarp, against your deductible
- Overlay or tear-off — same footprint, two scopes, and when a second layer is refused
- Soffit and fascia — the eave a shingle price usually leaves out
- Skylight — reflash, replace, or a new opening
- Roof extension — dormer or the roof over a new room
- Chimney — crown, flashing or a rebuild above the roof
- Should I file a claim? — the payout after your deductible against the premium increase
- Does roof repair require a permit? — thresholds, inspections, and what skipping it costs later
- Grants and assistance programs — for seniors, low-income and rural homeowners
- Roof grants eligibility checker — see which programs fit your income and location
- Taxes and financing — deductibility, cost basis, and how people pay for it
- Roof tax deduction calculator — deduction, 27.5-year rental depreciation or basis, by how the home is used
- Solar panel cost — and why roof age decides whether you pay to remove the array later
- What insurance actually pays — ACV vs RCV, claims, and roof buyback
Roof result summaryA useful roof comparison starts with pitch-adjusted surface area and roofing squares, then adds waste, removal, deck allowance, flashing, ventilation and permit scope. Age affects the modeled ACV amount, but the policy, covered cause of loss and endorsements determine the real claim payment.
Worked example: one roof, three climates
This is an illustration from this page’s calculator, not a quote. Inputs: 1,800 sq ft footprint, 6:12 pitch, average waste (15%), one tear-off layer, 10% of the deck replaced, one story. Pitch multiplier is √(1 + 0.5²) = 1.118, so the roof surface is about 2,012 sq ft and the order quantity is 23.1 squares. The homepage’s $16,805 point sits inside the national range below.
1,800 sq ft · 6:12 · architectural asphalt
Worked example| Surface after 6:12 pitch | 2,012 sq ft |
| Squares after 15% waste | 23.1 |
| Architectural shingles, national index 1.00 | $9,257 – $13,886 |
| Tear-off, one layer | $2,083 – $3,934 |
| Decking, 10% of the roof | $579 – $972 |
| Permit, before the regional index | $200 – $550 |
| Same house, South / Lower Midwest × 0.87 | $10,543 – $16,828 |
| Same house, Northeast metro × 1.26 | $15,270 – $24,371 |
| Same house, West Coast metro × 1.30 | $15,754 – $25,145 |
| National planning range | $12,119 – $19,342 |
There is no separate city price list. A city changes the labor index and the local permit, not the geometry. Climate changes a different line: ice-and-water shield in a cold climate, a wind or hail percentage deductible on the Plains (see the hail deductible calculator), and faster UV aging in a hot climate. Those are not baked into the three ranges above. Run the calculator with your index rather than trusting a single city average.
Questions
How much does a new roof cost?
Most US homeowners replacing asphalt shingles pay between $9,000 and $23,000. Roof area drives the figure rather than house size, and area depends on pitch — a steep roof can be 30% larger than the footprint beneath it.
Does homeowners insurance cover roof replacement?
Only for sudden covered perils — hail, wind, fire, falling trees. Wear and age are excluded by nearly every policy. If the cause is covered, how much you receive then depends on whether you hold an RCV or ACV policy.
What is roof replacement cost buyback?
An offer to pay you a lump sum in exchange for excluding the roof from future coverage. It ends your roof cover rather than improving it.
Does insurance pay full replacement cost on an older roof?
Coverage often narrows with age. Many carriers move roofs past 15 or 20 years onto actual cash value automatically, and some decline to renew altogether. Check your declarations page rather than assuming the terms you signed up to still apply.
Should I repair or replace?
Repair when damage is localized and the roof still has years left. Replace when the roof is past roughly 75% of its expected life, when repairs are recurring, or when granules are shedding across the whole surface. Repeated repairs on an old roof rarely work out cheaper.
How long does a roof last?
Three-tab asphalt around 20 years, architectural asphalt around 28, metal 45 to 50, tile 55, slate 80 or more. Ventilation matters as much as material — a poorly ventilated attic can take years off any roof.
Can roof repair costs be written off on taxes?
Not for your own home in the ordinary case. Repairs on a rental property are generally deductible as an expense, while a full replacement is usually capitalized and depreciated. Energy efficiency credits can apply to certain roofing products. Worth confirming with a tax professional for your own situation.
Do I need a permit?
In most US jurisdictions, yes, for a full replacement. Your contractor normally pulls it and includes the fee. Skipping it can cause problems at resale and can give an insurer grounds to question a later claim.
Can I reroof over the old shingles instead of tearing them off?
Sometimes. A reroof, or overlay, puts one new layer of asphalt shingles over one existing layer and skips the tear-off line, which at this calculator’s defaults is $2,229 to $4,210. Building codes based on the International Residential Code do not allow a new layer over two existing layers, over wet or deteriorated roofing, or over wood shakes, slate or tile. An overlay also hides the decking, adds weight and can shorten some shingle warranties. To approximate it here, set “Existing layers to remove” to None, or price both options side by side with the overlay vs tear-off calculator.
Can I use this calculator to estimate a roof repair?
No. It prices a full replacement: area, tear-off, decking, materials and permit. A repair is priced per job: use the roof repair calculator for a patch, pipe boots, a valley or a tarp, and the roof damage guide for what to do first after storm or leak damage.
Where these figures come from
Rates are cross-checked against 2026 published pricing from HomeGuide, Angi, HomeAdvisor,
NerdWallet and Modernize, then adjusted for pitch, waste and region. Published national
averages cluster around $9,500 because the average US roof is smaller than most people
assume — 1,300 to 1,800 sq ft. Depreciation is modeled straight-line against material
lifespan; carriers use their own schedules and some cap payouts by roof age. These are
ranges for planning, not quotes, and nothing here is a coverage determination.
Evidence trail
Reviewed 4 Aug 2026Sources used to check this model
Primary public references anchor labor, price movement and insurance terminology. Calculator rates remain planning assumptions tested against published market ranges.
U.S. labor referenceBLS: Roofers
Price movementBLS Producer Price Index
Insurance termsNAIC: ACV and replacement cost
These organizations do not endorse ReplaceCost. Local contractor quotes, permits, product specifications and the written insurance policy control the real result. See the full methodology for the source hierarchy and update process.
Roof planning
Key roof replacement questions, organized
Use these compact topics to move from a rough estimate to a quote-ready plan.
Roof supplement checkerWhat the adjuster’s sheet left out.Recoverable depreciation trackerGetting paid in full after the new roof.
Estimate the total replacement cost
Use the calculator above to adjust size, material, pitch, tear-off and related work.
Compare roof size and squares
Translate house size into roof area and understand why pitch and waste change the measured roofing quantity.
Review insurance payout factors
Compare replacement cost, actual cash value, depreciation and deductible effects.
Check permits and local requirements
See when permit, inspection or local code costs may affect the project.
Look for assistance options
Review legitimate program categories and eligibility paths without relying on “free roof” promises.
Plan taxes and financing
Read the tax-treatment and financing guide before assuming a repair or replacement is deductible.
Tree and emergency tarp calculatorPrice the tarp and tree removal after a storm.
Related searches
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