Most Seacoast homes: $11,500–$24,000 for a full tear-off and GAF Timberline HDZ system. Enter your ZIP and address and get your own range in about two minutes. No sales visit, no phone tag.
Family-owned in Dover, NH · Licensed & insured · GAF Certified Contractor · 5.0 ★ on Google
Instant estimate
ZIP first, then where to send it. About two minutes.
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! Check your email in a few minutes. We'll also reach out to offer a free inspection so the number becomes exact.
Want to talk now? Call (844) 386-8517.
| 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.
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.
With financing on approved credit, a $16,000 roof on a 10-year fixed term is in the neighborhood of $190–$210 a month depending on rate; a $22,000 roof is roughly $260–$290. We show the payment on the estimate when you ask. Soft credit check, no impact to your score, no prepayment penalty.
Ask every roofer for the same four line items: shingle tier and brand, ice & water shield coverage (eaves only, or eaves plus valleys and penetrations), ventilation (what's being added), and the per-sheet price for decking replacement. If a quote is silent on any of them, the price isn't final.
Nova Roofing & Siding is a family-owned, GAF Certified roofing contractor based in Dover, NH, 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.
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.
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.
For an asphalt architectural shingle roof with full tear-off, Seacoast NH homes typically run $11,500–$16,500 (ranch/cape), $16,000–$24,000 (colonial) and $23,000–$33,000+ (large or complex). That's about $810–$925 per square installed. Metal standing seam is $1,200–$1,500 per square.
100 square feet of roof surface. A 2,000 sq ft colonial usually has a 22–26 square roof because of pitch and overhangs. We measure the roof, not the house.
Usually one of four things: a different shingle tier, whether ice & water shield and ventilation are included or 'extra', whether decking replacement is priced or left as a surprise, and who actually does the work (subcontracted crews cost less and show up differently). Ask every roofer to itemize those four.
Compare it to the table on this page and to your instant estimate. A quote 20% over the top of the range for a normal roof deserves an explanation — sometimes there is one (steep pitch, two layers, rotten decking), often there isn't.
Only for sudden damage from a covered event like wind or a fallen tree, and only for the damaged part. Age and wear are never covered. We'll document storm damage honestly, but we don't promise what your insurer will do.
Yes. Financing is available through our lending partner on approved credit with a soft credit check. A typical Seacoast roof works out to a few hundred dollars a month on a fixed term.
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.
Enter your ZIP. If we serve your street, you'll have a real range today from the crew that would actually install it.
Free. No obligation. No high-pressure sales pitch.
