Roofing Cost Calculator (2026)

Estimate the cost to replace a roof. Pick your footprint, pitch, material (asphalt, metal, tile, slate, cedar shake), tear-off, and chimney/vent count. 2026 data; not a contractor bid.

By Martin Lashgari, Ph.D., P.E., PMP · Last reviewed July 2026

Aerial view of a multi-gable home roof mid-replacement with new architectural asphalt shingles, exposed underlayment, and bundles staged on the deck

Enter your roofing project

Includes labor, equipment, contractor markup, and permits.

Common projects

Roof dimensions

Floor-plan square footage of the area under the roof, not the slope area.
A 6/12 pitch adds 12% to area; 12/12 adds 41%. Steep pitches (8/12+) add labor.
Eaves + rakes. For a rectangular footprint that's 2(L+W). Drip edge runs along this entire perimeter.

Stories, complexity & access

Material

Uses the first 3 digits as a planning zone (not exact local pricing). Overrides state average when matched.

Tear-off, decking & flashings

Number of existing roof layers to remove. 0 = layover (not recommended). Most homes are 1-2 layers.
Rotten plywood / OSB found at tear-off. 5-10% common; 25%+ for older roofs.

Your roofing estimate

Estimated installed range
Calculating…
Materials
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Labor
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Per sq ft (footprint)
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Cost breakdown

Roofing cost breakdown: quantity and estimated range for each line item
ItemQuantityEstimated range
Planning estimate, not a bid. 2026 ranges informed by HomeGuide, SquareDash, This Old House. Compare written bids on an identical scope for accurate local pricing.
What's not included: structural deck repair (rotted plywood), gutters and downspouts, soffit/fascia repair, skylights, solar-panel removal/reinstall, and ridge cap upgrades.

Bid check

Got a roofing contractor quote? Compare it to the planning range.

Quote per sq ft
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Range check
Scope risk
Add a quote amount to compare it against the current estimate.

Methodology & sources

What this is: a planning-range roofing calculator informed by 2026 cost guides (HomeGuide, This Old House, SquareDash, Modernize).

Roof area auto-computed from footprint and pitch using the formula roof area = footprint × sqrt(rise² + 144) / 12. A 6/12 pitch multiplies footprint by 1.118, 12/12 by 1.414. Then a 10% waste factor is added for cuts at hips, valleys, and ridges.

Material pricing is per "square" (100 sq ft of roof surface), the industry standard unit. Underlayment, ice/water shield, and drip edge are added based on roof area and perimeter.

Labor is modeled from per-unit installed rates with a crew-rate sanity check ($80-$140/crew-hr loaded billing rate), informed by BLS OEWS 47-2181 (Roofers).

Last updated: July 2026. Full methodology →

Helpful materials & tools for this project

Re-roofing is mostly shingles and the weatherproofing layers under them:

  • Architectural shingles — The visible surface, sold by the square (100 sq ft).
  • Synthetic underlayment — The water-resistant layer over the deck.
  • Ice-and-water shield — Seals eaves and valleys against ice dams.
  • Drip edge & flashing — Metal that seals edges and penetrations.
  • Roofing nails & caps — Coil nails and cap nails for underlayment.

Suggested materials to help you plan — not an endorsement, and never a contractor referral.

Cost simulator Monte Carlo simulation See the full range of likely costs — with the odds

For a typical 2000 sf arch reroof, the installed planning band runs $14,049 to $20,019 nationally before regional adjustment. In our simulations, about 50% of these projects hit “rotted / soft roof decking found at tear-off”, typically adding $200–$1,200.

Worked example: Typical 2000 sf arch reroof

To show exactly how the band is built, here's the calculator's own engine run on the Typical 2000 sf arch reroof scenario at national average pricing — the same line items the calculator produces for this project, laid out as a bill of quantities.

Line-item bill of quantities for the Typical 2000 sf arch reroof worked example, with category and installed range per item
Line itemCategoryInstalled range
Architectural laminated shingles (24.6 squares incl waste)Materials$2,337 – $2,902
Synthetic underlaymentMaterials$559 – $894
Ice & water shield (eaves + valleys)Materials$396 – $671
Drip edge (perimeter)Materials$236 – $400
Chimney re-flashingMaterials$471 – $800
Pipe-boot / vent flashingMaterials$588 – $1,000
Tear-off existing roof (1 layer)Labor$1,789 – $2,460
Dumpster + disposal feesMaterials$353 – $600
Roofing install labor (1-story, simple complexity, standard access)Labor$3,991 – $4,696
Equipment + safety + ladders + jacksEquipment$471 – $800
Roofing permitPermits$150 – $800
Mobilization / minimum chargeLabor$200 – $200
Contractor overhead & profitMarkup 25–29%$2,509 – $3,795
Installed total$14,049 – $20,019

National average, planning ranges not a bid. Change the size, material, or ZIP in the calculator above to reprice this exact breakdown for your project.

What this project costs in different metros

Regional labor and material markets move the installed price. These bands come from the same engine as the calculator above, run at each metro's real cost multipliers — enter your ZIP in the calculator for a figure tuned to your exact area. National reference: $14,050–$20,000.

Roofing typical installed cost by metro area, compared with the national reference
MetroTypical installed rangevs. national
San Francisco, CA$18,300–$25,500+29%
New York, NY$18,650–$25,950+31%
Boston, MA$16,100–$22,750+14%
Chicago, IL$17,250–$24,100+21%
Atlanta, GA$16,850–$23,650+19%
Houston, TX$15,500–$21,850+10%
Miami, FL$14,050–$20,0000%
Phoenix, AZ$14,750–$20,950+5%

Planning ranges, not contractor quotes. Multipliers are rounded regional planning indices (see methodology), not a reproduction of any proprietary cost table.

What moves this price the most

Vary one input across its full range while holding everything else at the typical scenario, and this is how far each choice can move the installed estimate — measured by running the calculator's own engine. The widest bars are where your decisions matter most; the figures show the cheapest-to-priciest span each input creates on its own.

  • Roofing material$16,250–$83,700
  • House footprint (sq ft)$7,200–$67,150
  • Pitch (rise per 12 in run)$15,700–$33,550
  • Tear-off layers (count)$13,850–$22,350
  • Decking replacement (% of roof)$17,050–$23,650
  • Skylights to re-flash$17,050–$22,050

A tornado view: each row varies a single input; a real project moves several at once, so totals aren't additive.

How much does a roof replacement cost in 2026?

Most full residential roof replacements run $10,900 to $20,000 in 2026 for a typical 1,500-2,000 sq ft footprint. Material is the biggest swing — asphalt 3-tab at $4.50-$7.50/sq ft is the cheap end, slate at $25-$30/sq ft is the high end.

MaterialPer square (mat. only)Per sq ft installedLifespan
Asphalt 3-tab$90-$120$4.50-$7.5020-25 yr
Architectural asphalt$120-$180$6.00-$9.0030 yr
Metal (exposed fastener)$250-$500$6-$1040-50 yr
Metal (standing seam)$350-$700$10-$1650+ yr
Concrete tile$400-$700$11-$1750+ yr
Clay tile$600-$1,200$15-$2575+ yr
Slate$1,500-$3,000$25-$30100+ yr
Cedar shake$400-$700$8-$1530+ yr

What drives roofing cost

  • Material — asphalt to slate is a 6-7x range.
  • Pitch — a 6/12 roof has 12% more surface area than a flat one; 12/12 has 41% more. Steep pitches (8/12+) also add labor.
  • Tear-off — $1.00-$1.75/sq ft + $300-$600 dumpster fee.
  • Underlayment + ice/water shield — ~$0.50-$2.00/sq ft.
  • Flashing — chimneys $300-$800 each, pipe boots $75-$200 each.
  • Region — New York and California labor 30-35% above average; Florida hurricane-rated installs add code-upgrade costs.

Roof replacement cost by home size

Roof area is larger than the home's footprint because pitch adds surface. A moderate 4/12–6/12 pitch carries roughly 5–12% more area than the footprint; the table below uses a typical +10%. Ranges are installed costs from the material table above — 3-tab asphalt at $4.50–$7.50/sq ft and architectural shingles at $6–$9/sq ft — including tear-off-ready labor, underlayment, and flashing allowances priced by the calculator.

Home footprintApprox. roof area3-tab asphaltArchitectural shingles
1,000 sq ft1,100 sq ft (11 sq)$5,000 – $8,300$6,600 – $9,900
1,500 sq ft1,650 sq ft (17 sq)$7,400 – $12,400$9,900 – $14,900
2,000 sq ft2,200 sq ft (22 sq)$9,900 – $16,500$13,200 – $19,800
2,500 sq ft2,750 sq ft (28 sq)$12,400 – $20,600$16,500 – $24,800
3,000 sq ft3,300 sq ft (33 sq)$14,900 – $24,800$19,800 – $29,700

Steeper roofs move both numbers up: an 8/12 pitch adds about 20% more area plus a steep-pitch labor premium; a 12/12 pitch carries roughly 41% more surface than the footprint. Use the calculator's pitch input above for your actual geometry.

Repair or replace?

Repair makes sense when damage is isolated — a few wind-lifted shingles, one flashing leak, a single puncture — and the roof is under about two-thirds of its rated life (see the lifespan column above). Localized repairs preserve the remaining value of the roof you already paid for.

Replacement makes sense when granule loss, curling, or cracking is widespread; when leaks recur in different spots; when the decking feels soft or sags between rafters; or when the roof is at or past its rated lifespan. A second layer already on the roof also tips the decision — most codes allow a maximum of two layers, and stripping both at the next cycle costs more.

Insurance note: homeowners policies generally cover sudden storm damage (wind, hail, falling limbs) minus your deductible — not age or wear. RCV (replacement-cost-value) policies pay today's replacement cost; ACV policies subtract depreciation for the roof's age, which on an older roof can leave a large gap. Photograph damage with dates, request the insurer's adjuster inspection early, and be wary of any contractor offering to "cover your deductible" — that practice is illegal in several states.

Metal vs asphalt: the long-horizon math

Standing-seam metal installs at $10–$16 per sq ft versus $6–$9 for architectural asphalt — roughly 1.7x the upfront cost. The offset is lifespan: 50+ years versus about 30. Over a long ownership horizon, one metal roof can outlive two asphalt cycles, and it adds hail and fire resistance plus better snow shedding.

Exposed-fastener metal panels ($6–$10/sq ft installed) are the budget path into metal — the trade-off is gasketed screws that need inspection and eventual re-tightening, versus the concealed clips of standing seam. If you expect to sell within about ten years, architectural asphalt usually pencils out better; the next owner captures most of a metal roof's longevity premium.

Frequently asked questions

How much does a roof replacement cost in 2026?

Most full residential roof replacements cost $10,900 to $20,000 in 2026 - a 1,500 sq ft simple ranch runs $10,900-$15,800, and a typical 2,000 sq ft home with architectural shingles runs $14,000-$20,000 installed. Effective installed rates including tear-off, underlayment, permit, and markup: 3-tab $6.10-$8.70/sq ft, architectural $6.40-$9.10, metal $9.10-$17.30, clay tile $11.50-$19, slate $21.80-$37.20.

What's a roofing square?

100 square feet of roof surface. A 2,000 sq ft roof = 20 squares. Roofing materials are priced per square as the industry standard.

Do I need a permit to replace my roof?

Most U.S. cities require permits for roof replacement. Permits range $150-$800 by region. Always check with your local building department.

Should I tear off the old roof?

Most contractors recommend tear-off — it reveals damaged decking and lets the new roof start fresh. Some jurisdictions allow one layer-over. Tear-off costs $1-$1.75/sq ft plus $300-$600 dumpster.

How long does a new roof last?

Asphalt 3-tab: 20-25 years. Architectural asphalt: 30. Metal: 40-50. Concrete tile: 50+. Clay tile: 75+. Slate: 100+. Cedar shake: 30+.

What's the steepest roof you can DIY?

Anything 6/12 or less is workable for a careful DIYer with proper safety equipment. 8/12+ requires harness work, harder physical demands, and significant skill. Most roofers won't price a DIY-handoff.

What's ice and water shield?

A self-adhering rubberized membrane installed at eaves, valleys, and around penetrations. The IRC requires it in cold climates, extending 24 in past the interior wall line. Adds $1.00-$2.00/sq ft to that area.

Why does the calculator show a price range?

Roofing prices vary 30-60% by region, season, contractor, and material brand. A range gives an honest planning estimate.

How much does a new roof cost on a 2,000 sq ft house?

A 2,000 sq ft footprint carries roughly 2,200 sq ft of roof surface on a moderate pitch (about 22 squares). That is $13,300-$19,200 installed with 3-tab asphalt, $14,000-$20,000 with architectural shingles, and $23,500-$38,100 with standing-seam metal.

Does homeowners insurance pay for a new roof?

Usually only when sudden storm damage (wind, hail, fallen trees) is the cause - not age or wear. RCV (replacement cost value) policies pay current replacement cost minus your deductible; ACV policies subtract depreciation for the roof's age. Document damage with dated photos and get the insurer's adjuster out before signing a contractor agreement.

Is a metal roof worth the extra cost?

Standing-seam metal runs $11-$17 per sq ft installed versus $6.40-$9.10 for architectural asphalt, but lasts 50+ years versus about 30. Staying long-term, one metal roof can outlive two asphalt roofs and adds hail and fire resistance. Selling within about ten years, asphalt usually pencils out better.

Common mistakes & questions

  • Multiple existing layers — code allows max 2 layers in most jurisdictions; tear-off mandatory beyond.
  • Skip ice + water shield — required at eaves/valleys in cold climates (zone 4+).
  • Skip ventilation upgrade — undervented roofs cook shingles in 10-12 yr instead of 20-25.
  • Cheap underlayment — synthetic underlayment is the new code default, not 15# felt.
  • Ask your contractor: manufacturer warranty (Atlas/GAF/Owens Corning system), nail pattern, ice shield height, ridge ventilation.

When this estimate is wrong

  • Rotted deck is only found at tear-off — soft or delaminated sheathing around valleys, chimneys, and eaves has to be replaced by the sheet, and no one can price it until the old roof is off.
  • Existing layers change the labor — a second or third layer of shingles means more tear-off and disposal, and most codes cap the roof at two layers, forcing a full strip.
  • Flashing is where roofs leak — new step flashing at walls and proper flashing at valleys, chimneys, and skylights is real labor that a shingle-only figure understates.
  • Steep pitch, height, and access add cost — anything past a walkable slope, or a tall multi-story roof, needs staging and slows every stage of the job.
  • Ice-and-water and underlayment are code-driven — cold-climate eaves and valleys require an ice barrier, and synthetic underlayment is now the default, both adding to a bare-shingle price.
  • Ventilation may need to be brought up to code — adding ridge vent or intake to meet current requirements protects the warranty but adds scope.
  • Permits and inspections add time — a re-roof permit and its inspection add days, and a failed inspection adds rework before the job closes.