GAF Certified, family-owned in Dover, lifetime workmanship warranty. See your price online in about two minutes, or book a free inspection and get a written estimate within 48 hours.
Family-owned in Dover, NH · Licensed & insured · GAF Certified Contractor · 5.0 ★ on Google
Free estimate
Two steps, under a minute. Your number is in the email; the fixed price comes after a free inspection.
Nova serves the New Hampshire Seacoast and Southern Maine — Dover, Portsmouth, Rochester, Exeter, Hampton, Kittery, York and the towns around them. We'd rather tell you now than waste your afternoon.
If you're nearby and it's a full roof replacement, (844) 386-8517 and we'll tell you honestly whether we can do it.
Thanks there! We'll email your estimate range and reach out to offer a free inspection so the price is exact.
Want to talk now? Call (844) 386-8517.
Nova Roofing & Siding is a family-owned roofing and siding contractor based in Dover, New Hampshire, serving Strafford County, Rockingham County and York County, Maine.
“The only thing I can say after my experience working with Nova Roofing and Siding is unbelievable! They did the most professional and fast job and at very reasonable price. They stripped the old roof, applied 90 sheets of plywood and very professionally applied the new, top of the line roof all in one day.”
— RJ Lincoln, Google review“New roof looks amazing! The job was affordable and work was professional and timely.”
— Logan McColl, Google review“Nova Roofing made my roof replacement a breeze. Not to mention they have very fair pricing and great customer service. 10/10 will recommend to family and friends moving forward!”
— Kevin Garrabrant, Google reviewRated 5.0 on Google. Read every review.
You asked. Here are the ranges we actually quote, updated September 2026.
| Home | Roof size | Typical installed price* | What's included |
|---|---|---|---|
| Ranch or cape 1,200–1,600 sq ft living space | 14–18 squares | $11,500 – $16,500 | Full tear-off, GAF Timberline HDZ, ice & water shield, synthetic underlayment, ridge vent, cleanup, warranty registration |
| Colonial or split 1,800–2,600 sq ft | 20–26 squares | $16,000 – $24,000 | Same system; most Seacoast colonials land here |
| Large or complex 2,800+ sq ft, multiple pitches, dormers | 28–36+ squares | $23,000 – $33,000+ | Same system; steep pitch, valleys and dormers add labor |
*Nova's current pricing for asphalt architectural shingle systems in Seacoast NH and Southern Maine, updated September 2026: roughly $810–$925 per square (100 sq ft) installed, including tear-off of one layer. Add-ons: skylight flashing kits about $400 each, chimney flashing about $350, rotted decking replaced per sheet at cost plus labor. Metal standing-seam runs $1,200–$1,500 per square. Your instant estimate uses these same numbers; the fixed price comes after we walk the roof.
Whether you called us from ChatGPT, Google, or a neighbor's recommendation. Whether you asked for financing. Whether you got two other quotes. The number is the number.
A roof is the shingle plus everything under it. Here's what Good / Better / Best means on a Nova estimate.
GAF's most-installed architectural shingle
What most Seacoast homeowners choose
Thicker, deeper shadow line, higher wind rating
Nova is a GAF Certified Contractor. Warranty terms above are GAF's published terms for registered installations; your contract lists the exact coverage.
Manufacturer. Nova is a GAF Certified Contractor, which lets us register your roof for GAF's System Plus warranty when we install the full GAF system: 50-year non-prorated coverage on the materials, 15-year WindProven coverage with no maximum wind speed (named storms included), and 25-year StainGuard Plus algae coverage. GAF backs it, not us.
Workmanship. Nova puts a lifetime workmanship warranty in every roofing contract. If something we installed leaks because of how we installed it, we fix it. That's the one most contractors quietly cap at two years.
Financing is available through our lending partner on approved credit, with a soft credit check that doesn't affect your score. Fixed monthly payments; no prepayment penalty. We'll show you the payment on your estimate if you ask — and never push it if you don't.
More projects by town on our projects page.
Enter your address; we size the roof from aerial imagery and give you a range in about two minutes. No sales visit required.
One of us walks the roof, checks the attic, photographs every problem area and explains what we found in plain English.
A line-item proposal with shingle tiers, warranty terms and financing if you want it. E-sign when you're ready; no deadline pressure.
Most homes are done in one day. Tarps, magnet sweep, permit and final inspection handled. Warranty registered with GAF.
The ZIP check on the form is exact; this is the map.
Roughly 30 minutes from our Dover shop in every direction. Farther out, we take full roof replacements case by case — the ZIP check on this page tells you instantly.
Most Seacoast NH and Southern Maine homes land between $11,500 and $24,000 for a full tear-off and GAF Timberline HDZ system, depending on size, pitch and complexity. Large or steep roofs run higher. The instant estimate on this page gives you your own range in two minutes.
Age is the biggest signal. A roof over 20 years old with curling, bald spots or more than one leak is usually past repair. A newer roof with one bad spot is a repair. Our free inspection tells you which, with photos.
An architectural asphalt roof installed correctly with ice & water shield and balanced ventilation typically lasts 25–30 years on the Seacoast. Three-tab shingles from the 1990s and 2000s are usually done at 18–22 years. Salt air, ice dams and north-facing moss all shorten that.
If the roof is under 15 years old with one problem area, repair. If it's 20+ years, has more than one leak, curling or missing granules across the whole slope, or a second layer, replacement is the better money — repairs on a tired roof are a subscription. Our inspection tells you which honestly; we do both.
Yes, by the sheet, at cost plus labor, and we photograph every sheet before it's replaced so you can see why.
One day for most homes under 30 squares; two days for large or steep roofs or if we're replacing a lot of decking. We start early, tarp everything, and run a magnet for nails before we leave.
Yes. We handle the building permit with your town and the final inspection where the town requires it.
No — Nova is a GAF Certified Contractor. That's the certification that lets us register the GAF System Plus warranty. We'd rather tell you exactly what we are than inflate it.
Yes. The instant estimate on this page gives you a range from your address and roof size in about two minutes. The fixed price comes after a free inspection, because we won't guess at decking or layers from a satellite photo.
We install roofs year-round when the deck is dry and the temperature allows shingles to seal; emergency repairs and tarping happen in any weather.
Nic, the owner, or our office during business hours. After hours, leave a message and you'll hear back first thing.
Start with your ZIP. If we serve your street, you'll have an estimate range today and a written quote within 48 hours of the inspection.
Free. No obligation. No high-pressure sales pitch.
