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How Much Does a New Roof Cost in NH?

Updated 2026-10-10 · 6 min read

What drives the price of a new roof in New Hampshire: tear-off or overlay, deck repairs, ice barrier, materials, permits, storm claims and comparing bids.

Why this guide doesn't quote a price

We couldn't find an official or government source that publishes roof replacement prices for New Hampshire, and we don't want to pass along guesses. Two houses on the same street can get very different quotes because of roof shape, the condition of what's under the shingles, and how much old roofing has to come off. What this guide does instead is walk through the things that move the price, so you can read a quote, ask the right questions and compare bids fairly.

The main things that drive the price

Size. Roof area is what matters, not the home's floor space, so overhangs and attached porches or garages add to it.
Pitch and complexity. Steep roofs take more safety setup and slower work. Valleys, dormers, skylights, chimneys and walls that meet the roof all need extra cutting and flashing.
Access. A house with tight setbacks, landscaping close to the walls or nowhere to park a dumpster can take longer to work on.
How many layers come off. More layers mean more labor and more debris to haul away.
The roof deck. Rotted or soft sheathing usually isn't visible until the old roofing is off, so it's often priced as an add-on.
Flashing and trim. New flashing around chimneys, walls and vents, plus drip edge, adds cost but is where many leaks start.
Ventilation. If the attic needs more intake or exhaust venting, that work is often done during the reroof.
Material. Asphalt shingles, standing-seam or other metal, and specialty roofing differ in material cost, install time and expected life.
Disposal. Dumpster rental and disposal fees are part of the job, and older roofs may need extra handling (see the asbestos note below).

Tear-off or a second layer?

Going over an existing roof skips tear-off and disposal, but the code limits it. New Hampshire's state building code adopts the 2024 International Residential Code with state amendments. The model 2024 IRC doesn't allow a roof recover where the existing roof already has two or more layers of roof covering. A building official's summary of the 2024 IRC reroofing sections notes that a tear-off is required in that case. Nashua puts it simply for homeowners: you can go over existing shingles only if there's just one layer.

Even when a second layer is allowed, many homeowners choose a full tear-off. It lets the roofer see the deck, replace damaged sheathing and install new underlayment and flashing from scratch. Ask each contractor which approach they're pricing and why.

Code items that show up on the bill

Roofing in a cold climate brings a few requirements that add materials and labor:

Ice barrier at the eaves. Nashua tells homeowners who strip a roof to use water and ice shield on the first 3 feet of the roof and at least 15-pound felt under the rest of the shingles. Requirements depend on the code your town enforces. Our ice dam guide explains why this matters in NH.
Permits. Rules vary by town. Nashua doesn't require a permit to re-roof a one- or two-family home, but the work still has to meet the building code. Other towns may require one, so ask your building department and see our building permit guide. If a permit is needed, the contract should say who pulls it.
Asbestos in older roofs. The EPA lists roofing and siding shingles among products that may contain asbestos. EPA advises having suspect material sampled by a trained, accredited professional rather than doing it yourself (EPA). If testing finds asbestos, removal and disposal cost more. See our asbestos guide.

Materials and warranties

Most quotes will be for asphalt shingles, with metal as the common alternative. Ask each roofer to name the exact product line, not just "architectural shingles," so you can compare like with like.

There are usually two kinds of warranty on a new roof. The manufacturer's warranty covers the materials, and its terms can depend on the installer following the manufacturer's instructions or using its matching components. The contractor's workmanship warranty covers installation mistakes. They're separate, so get both in writing. The FTC's warranty advice applies here: read the warranty before you buy, treat anything not listed as not covered, find out who you contact for a claim, get any spoken promise in writing, and keep the warranty with your receipt.

Compare quotes line by line

The FTC recommends getting more than one estimate, not automatically taking the lowest bid, and asking why if the prices are far apart. A written estimate should describe the work, materials, completion date and price. For a roof, ask every bidder to spell out:

Tear-off or overlay, and how many layers they're removing
How deck repairs are priced (for example, a per-sheet price) and how you'll be told before extra work is done
Underlayment type, and how far up the roof the ice barrier goes
Whether flashing, drip edge and pipe boots are new or reused, and how chimney flashing is handled
Any ventilation changes
Dumpster, disposal and cleanup, including nail pickup
Permit responsibility, start date, payment schedule and both warranties

Paying for the job

The FTC advises not paying the full amount up front and holding the final payment until the work is done and you're satisfied. Pay by credit card or check rather than cash. If a contractor offers to arrange financing, the FTC suggests shopping around and comparing loan terms before agreeing. Our hiring checklist covers insurance certificates, written contracts and lien waivers, and our contracts and complaints guide explains your right to cancel some home sales and where to complain.

Storm damage and insurance claims

If a storm damages your roof, insurance may cover some of the cost, but not necessarily a whole new roof. The NH Insurance Department explains that an insurer is only obligated to pay for repairing the part of the roof damaged by a covered peril. Even if a contractor recommends replacing the entire roof, if that's needed because of normal wear and tear, you pay the additional cost. The Department also notes that most homeowners policies cover wind damage to the house.

How the claim is paid matters too. The Department's advisory on actual cash value and replacement cost explains that actual cash value is replacement cost minus depreciation, and that after a covered loss the insurer initially pays on that basis. With replacement cost coverage, the insurer typically reimburses what it actually costs to repair or replace, up to your limits, as long as you notify it within 180 days of the loss that you intend to repair. Your policy's terms, deductible and exclusions decide the details, so read it and ask your agent or insurer.

The FTC warns not to rely on a contractor to tell you what's covered and never to sign your insurance check over to a contractor. For coverage or claim questions, the Insurance Department's Consumer Services unit can be reached at (603) 271-2261 or toll-free in NH at (800) 852-3416. This is general information, not insurance advice.

Watch for storm chasers

After big storms, out-of-area crews and door knockers show up offering quick roof repairs. The FTC lists these red flags:

Claiming they don't need a license to do the work
A discount only if you sign right away
Asking you to sign a blank contract
Asking for full payment up front
Insisting on wire transfer, gift cards, payment apps, cryptocurrency or cash
Steering you to a lender they know

Timing and lead time

Lead times vary from one company to the next and can stretch after a major storm. Ask for a realistic start date in writing and what happens if weather delays the job. Roofing depends on the weather, and our seasonal planning guide covers scheduling. When you're ready, find a roofer near you and ask two or three for detailed quotes.

This guide is general information, not legal, insurance or financial advice. Code requirements and permit rules vary by town and change over time, so confirm with your local building department and your insurer.