Roof Replacement Cost Calculator (2026) — Cost Per Square Foot by Material

Inputs

Measure by

Home footprint (sq ft)

Ground-floor footprint — we add for roof pitch and waste.

Roof pitch

Material

Tear off the old roof

Existing layers to remove

Roof complexity

Stories

State (optional)

Sets a low / average / high cost tier for your state. You can still change it below.

Region

Result

Adjust the inputs to see your result.

Recommended gear

Recommended for this job

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Roofing underlayment & ice-and-water shield
Synthetic underlayment and a valley/eave membrane are cheap insurance against leaks.
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Roofing nails & coil nailer
Galvanized or stainless coil nails sized to your shingle; a pneumatic coil nailer if you're DIY-ing a shed or garage.
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Roof safety harness kit
A roof harness, rope grab, and anchor — non-negotiable on anything steeper than a low slope.
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Replacing a roof costs about $4–$11 per square foot installed for asphalt through metal — roughly $15,200–$21,800 for a typical 2,000 sq ft home in architectural asphalt with tear-off. Budget 3-tab starts near $3.50/sq ft; tile and slate run $10–$30. Use the calculator below for your size, pitch, material, and region.

How the estimate works

Roofers price by the "square" — 100 square feet of roof surface. The calculator first turns your home's footprint into actual roof area by applying a pitch multiplier (a steeper roof has more surface for the same footprint), adds 10% for waste and starter/ridge, and divides by 100 to get squares.

Each material has a national installed-cost range per square that already blends material and labor — from about $350–475 for 3-tab asphalt up to $1,500–3,000 for natural slate. Tear-off is added separately (roughly $125 per square per existing layer), and then complexity, number of stories, and your region scale the whole thing up or down. The result is an honest low-to-high range, because real roofing bids vary that much.

What drives the price

Material is the biggest lever — slate or standing-seam metal can cost 4–5× an asphalt roof.
Pitch adds both surface area and labor difficulty. A 12:12 roof can't be walked without staging.
Tear-off and deck repair are the wildcards — rotten sheathing hidden under old shingles is the most common budget-buster.
Region swings labor by 40% or more between rural South and coastal metros.

Common mistakes

Pricing by footprint, not roof area. A 1,700 sq ft house can have 2,200+ sq ft of roof once pitch and overhangs are counted.
Forgetting tear-off and disposal. Dumpster and labor to strip two layers is real money.
Choosing slate or tile without a structural check. They weigh 3–4× asphalt; your framing may need reinforcement.
Taking one bid. Roofing bids for the same job routinely vary 30–40%. Always get three.

When this calculator is the wrong tool

Use a pro inspection for: structural repairs, low-slope/flat commercial membranes (EPDM/TPO priced differently), insurance-claim scope, or historic slate restoration. This tool estimates a standard residential re-roof.

The methodology, step by step

The estimate is built from one core unit roofers actually price by — the square (100 sq ft of roof). Here is the exact chain of math the calculator runs, with the same assumptions a contractor uses when they walk your roof:

Footprint → roof area. If you enter your ground-floor footprint, we multiply it by a pitch factor because a sloped roof has more surface than the floor below it. The factors are 1.10× for a low slope (flat to 3:12), 1.20× for moderate (4:12–6:12), 1.35× for steep (7:12–9:12), and 1.50× for very steep (10:12+). If you already measured the roof, we skip this step.
Waste allowance. We add 10% for cut-offs, starter and ridge courses, and hip/valley waste. Every honest estimate includes this; a quote that doesn't is short on material.
Convert to squares. Divide the finished area by 100. A 2,200 sq ft roof is 22 squares.
Material + labor per square. Each material carries a national installed range that already blends shingles, underlayment, flashing, and crew labor — from about $350–$475/sq for 3-tab asphalt up to $1,500–$3,000/sq for natural slate.
Tear-off. If you're stripping the old roof, we add $125 per square per existing layer for labor and dumpster disposal.
Scaling factors. We then apply a combined multiplier for complexity (0%, +8%, or +18%), stories (0%, +8% for two, +15% for three-plus), and region (×0.85 lower-cost, ×1.00 average, ×1.25 higher-cost metro).

The output is deliberately a low-to-high range, not a single number, because three legitimate roofers bidding the same job routinely land 30–40% apart on price.

A worked example

Take a 2,000 sq ft single-story ranch in Ohio (a national-average labor market) getting architectural asphalt shingles, with one old layer torn off and a simple gable roof:

Roof area: 2,000 × 1.20 (moderate pitch) = 2,400 sq ft, plus 10% waste = 2,640 sq ft ≈ 26.4 squares.
Material + labor: 26.4 squares × $450–$700/sq = $11,880–$18,480.
Tear-off: 26.4 squares × $125 × 1 layer = $3,300.
Multipliers: simple roof (×1.00), one story (×1.00), average region (×1.00) — no adjustment.
Installed total: roughly $15,200–$21,800, with a midpoint near $18,500.

Move that same house to a higher-cost coastal metro (×1.25) and the range jumps to about $19,000–$27,000. Switch to standing-seam metal and you're closer to $30,000–$48,000. Same house, same footprint — the material and the ZIP code do most of the talking.

Where every dollar goes

For a typical asphalt re-roof, here's how the budget splits — useful for sanity-checking a quote that feels lopsided:

Labor: 40–60% of the job. Roofing is the most labor-intensive part of a re-roof. This is the line that swings most by region and crew demand.
Shingles and main material: 25–40%. The visible product. Upgrading from 3-tab to architectural adds roughly $100–$225 per square here.
Tear-off and disposal: 8–15%. Stripping shingles and hauling them to a landfill. Each extra layer adds another $125/sq.
Accessories: 5–12%. Underlayment, ice-and-water shield, drip edge, flashing, valley metal, ridge vent, and fasteners — small line items that protect the whole roof.
Deck repair: $0–$3,000+ (the wildcard). Replacing rotten plywood sheathing runs about $70–$100 per 4×8 sheet installed. You can't price this until the old roof is off, so a good contractor lists a per-sheet rate in the contract rather than burying it.

Material comparison: lifespan vs. installed cost

Cost per square only tells half the story — divide it by how long the roof lasts and the picture changes. Ranges below are national installed costs (material plus labor):

Material	Installed $/square	Installed $/sq ft	Typical lifespan	Best for
Asphalt — 3-tab	$350–$475	$3.50–$4.75	15–20 yrs	Tight budgets, rentals, short stays
Asphalt — architectural	$450–$700	$4.50–$7.00	25–30 yrs	Most homes — the default sweet spot
Metal — ribbed / corrugated	$550–$950	$5.50–$9.50	30–45 yrs	Barns, cabins, value-minded upgrades
Metal — standing seam	$900–$1,700	$9.00–$17.00	40–70 yrs	Forever homes, snow, fire zones
Composite / synthetic shake	$700–$1,200	$7.00–$12.00	40–50 yrs	Cedar look without the upkeep
Cedar shake	$800–$1,400	$8.00–$14.00	25–40 yrs	Traditional aesthetics (needs upkeep)
Clay / concrete tile	$1,000–$1,900	$10.00–$19.00	50–100 yrs	Hot, dry, Southwest climates
Natural slate	$1,500–$3,000	$15.00–$30.00	75–150 yrs	Historic homes, generational ownership

The math that matters: architectural asphalt at $575/sq over 27 years is about $21/sq/year; standing-seam metal at $1,300/sq over 55 years is about $24/sq/year. They're far closer on a lifetime basis than the upfront price implies — the real question is whether you'll be there to collect the back half of that lifespan.

Red flags in a roofing quote

Before you sign, run the bid past this checklist. Most roofing complaints trace back to one of these:

A price quoted over the phone or without climbing the roof. Nobody can bid accurately without measuring pitch, layers, and deck access.
No square count or per-square price. A real quote states how many squares the roof is. If it's just one lump sum, you can't compare bids apples-to-apples.
Large upfront deposit. A third down is reasonable; demanding half or more before any material arrives is a warning sign. Never pay in full before completion.
No mention of underlayment, ice-and-water shield, or drip edge. These are code in most areas. Leaving them off the line items is how a bid gets artificially low.
Cash-only, no written contract, or no license and insurance. Ask for the contractor's license number and a current certificate of insurance, and verify both. Storm-chasing crews that knock after a hailstorm are the classic offenders.
A warranty you can't pin down. Separate the manufacturer material warranty from the contractor workmanship warranty — most leaks come from bad installation, not bad shingles, so the workmanship warranty (ask for 5–10 years) matters most.

Sources & how we keep this current

The cost ranges in this tool are national installed-cost averages compiled from public 2024–2026 home-improvement pricing data, then reconciled against manufacturer spec sheets for lifespan figures. Primary references:

Remodeling magazine's annual "Cost vs. Value" report — for regional asphalt and metal re-roof averages and resale recoupment.
Angi and HomeAdvisor cost guides — for crowd-sourced homeowner-reported project totals by material and region.
Manufacturer data (e.g., GAF, Owens Corning, CertainTeed for asphalt; standing-seam and tile makers) — for warranty lengths and expected service life.

National averages are a starting point, not a quote — local labor rates, material availability, and season can move your real number well outside these bands. We last reviewed the underlying ranges in June 2026 and revisit them as new cost surveys publish. Treat the calculator's output as a budgeting baseline, then confirm with 2–3 written local bids.

Related guides

FAQ

Questions, answered

How much does it cost to replace a roof?

For a typical 1,700–2,000 sq ft home with architectural asphalt shingles and one layer torn off, most homeowners pay roughly $9,000–$20,000 installed, with the national midpoint around $12,000–$15,000. Metal, tile, and slate cost two to five times more. Your final price depends on roof size, pitch, material, and local labor rates.

What's a 'square' in roofing?

A roofing square is 100 square feet of roof surface — the unit roofers price by. A 2,000 sq ft roof is 20 squares. This calculator converts your house size and roof pitch into squares, then prices the material and labor per square.

Does a steeper roof cost more?

Yes, two ways. A steeper pitch means more actual roof surface area for the same footprint (the calculator applies a multiplier), and steep roofs need staging and fall protection, which raises labor. Very steep roofs also attract fewer bids, pushing prices toward the high end.

Should I tear off the old roof or go over it?

Tearing off costs more now (roughly $100–$200 per square) but lets the crew inspect and repair the deck, and it resets the roof's life. Roofing over an existing layer is cheaper but most codes allow only two total layers, and you can't see rot underneath. For a long-term roof, tear off.

Is this an exact quote?

No — it's a planning estimate built from national average cost ranges. Roofing prices swing widely by region, season, and crew. Always get 2–3 written bids from licensed local roofers before budgeting.

How long does a roof replacement take?

A standard asphalt re-roof on a single-family home is usually a 1–3 day job for a full crew — most are done in two days. Add a day for tear-off of multiple layers, deck repairs, or complex roofs with many valleys and dormers. Metal, tile, and slate run longer: 3–7 days is common because the materials are heavier, slower to install, and need more precise flashing. Weather delays are the main wildcard, so build a rain day into your schedule.

Is a metal roof worth the extra cost?

It depends on how long you'll stay. Standing-seam metal runs roughly $900–$1,700 per square installed versus $450–$700 for architectural asphalt — often two to three times more. But asphalt lasts 20–30 years while a quality metal roof lasts 40–70, so on a lifetime-cost basis they're closer than the sticker suggests. Metal also sheds snow, resists fire, and can cut cooling bills. If you plan to move within 10–15 years, asphalt is the better dollar value; if this is your forever home, metal can pay off.

Will homeowners insurance pay for a new roof?

Insurance covers roof replacement when the damage comes from a covered sudden event — hail, wind, a fallen tree — not from age or wear. Most policies now use 'actual cash value' (ACV) for older roofs, meaning they depreciate the payout by the roof's age, so a 15-year-old roof may only get partial reimbursement. File promptly, photograph the damage, get a contractor's inspection report, and read your deductible and ACV-versus-replacement-cost terms before assuming a full payout.

What's the best time of year to replace a roof?

Late spring through early fall is ideal — shingles seal best in warm, dry weather. But that's also peak season, when crews are booked and prices are highest. The value sweet spot is late fall or winter in mild climates: roofers are slower, more willing to negotiate, and you can sometimes save 5–10%. Avoid scheduling around the first cold snap, since asphalt shingles need warmth (or hand-sealing) to bond properly.

Do I need a permit to replace my roof?

Almost always, yes. Most jurisdictions require a permit for a full re-roof, and a licensed roofer typically pulls it as part of the job — confirm this is in your contract. The permit triggers a code inspection that checks for proper underlayment, ice-and-water shield, drip edge, and the two-layer limit. Skipping the permit can void your warranty, cause problems at resale, and leave you on the hook if a future buyer's inspector flags unpermitted work.

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

A 2,000 sq ft footprint at a moderate pitch works out to about 26 squares of roof surface after waste. In architectural asphalt that's roughly $11,900–$18,500 for material and labor, plus about $3,300 to tear off one old layer — call it $15,200–$21,800 installed in an average market. Standing-seam metal on the same house runs closer to $30,000–$48,000.

How much does a new roof cost per square foot?

Installed, with labor: 3-tab asphalt runs $3.50–$4.75 per sq ft, architectural asphalt $4.50–$7.00, ribbed metal $5.50–$9.50, standing-seam metal $9–$17, clay or concrete tile $10–$19, and natural slate $15–$30. Add roughly $1.25 per sq ft per layer for tear-off, then adjust for pitch, complexity, and region.

How much does tear-off add to a roof replacement?

Figure about $125 per square (100 sq ft) per existing layer for labor and disposal — roughly $3,300 on a typical 26-square roof with one layer. Two layers doubles that, which is one reason codes cap roofs at two layers and why 'roof-over' quotes look cheaper than they end up being.