A typical Derry NH roof replacement runs $6,400 to $11,900 in 2026 (VHCI v2.0), modeled from federal wage and price data plus a snow-and-ice climate modifier. Derry is a Boston-commuter suburb of simple, moderately pitched roofs — fast to install, low on waste, and easy on the budget.
As of 2026, replacing a standard 22-square (about 2,200 sq ft) residential roof in Derry, New Hampshire costs between $6,400 and $11,900, with a mid-point of $8,700 (VHCI v2.0). Those figures come from the Vanderflip Home Cost Index, which builds every number from the U.S. Bureau of Labor Statistics mean roofer wage of $25.90/hour for the Manchester-Nashua MSA (SOC 47-2181, CBSA 31700), a U.S. Bureau of Economic Analysis Regional Price Parity of 104.165, and a 1.22 climate modifier for New Hampshire snow load and mandatory ice-dam protection, with a $600 tear-off allowance. No proprietary contractor databases are used.
Sources: U.S. Bureau of Labor Statistics OEWS (SOC 47-2181, Manchester-Nashua MSA, CBSA 31700), bls.gov/oes · U.S. Bureau of Economic Analysis, bea.gov · U.S. Army Corps of Engineers ERDC/CRREL TR-02-6 · Town of Derry Building Department · New Hampshire OPLC (oplc.nh.gov) · FEMA, msc.fema.gov · Vanderflip Home Cost Index v2.0. Informational only.Adjust material and roof size for a Derry-specific estimate. All figures derive from the VHCI v2.0 model — BLS wages (CBSA 31700), BEA price parity 104.165, and the 1.22 New Hampshire snow-and-ice climate modifier.
Estimate for educational planning purposes only. Not a contractor bid or guarantee.
Derry is a Boston-commuter bedroom suburb in southern New Hampshire, and it is one of the more affordable places in the state to put on a roof. The Vanderflip Home Cost Index puts a standard 22-square replacement at $6,400 low, $8,700 mid, and $11,900 high (VHCI v2.0). The number is moderate because Derry's housing stock is simple — postwar and later subdivisions with straightforward rooflines — even though its snow load is the heaviest in its metro.
The labor component is anchored to public data. The U.S. Bureau of Labor Statistics reports a mean roofer wage of $25.90/hour (SOC 47-2181) for the Manchester-Nashua MSA (CBSA 31700), which covers Derry. The index loads that base wage for burden and overhead, scales the material rate by the U.S. Bureau of Economic Analysis Regional Price Parity of 104.165, and applies a 1.22 snow-and-ice climate modifier for the ground snow load and the code-required ice-and-water barrier. A $600 tear-off allowance covers stripping the old roof to the deck. Together these produce the low, mid, and high bands above (VHCI v2.0).
What keeps Derry moderate is roof geometry: simple profiles waste less material and install faster. The sections below walk through the permit, the simple-suburb profile advantage, the statewide HIC registration, the 2024 IRC and its mandatory ice barrier, the heavy metro snow load, the ice-dam threat, the local employment anchors, and the Beaver Brook flood zone, in the order they hit your wallet.
The Town of Derry requires a building permit for a re-roof, and the fee is valuation-based: about $95 on a typical roof — a $35 base fee plus $5 per $1,000 of project valuation. As a town government, Derry runs a straightforward 2 to 5 day permit-processing window. Apply at the Derry Building Department, 14 Manning Street, Derry NH 03038, (603) 432-6148.
The roofing contractor typically pulls the permit. Unlike Concord or the Dover mill district, Derry has no historic-district overlay, so there is no Certificate of Appropriateness step — the building permit is the whole approval.
Derry grew as a Boston-commuter bedroom community, and its housing stock reflects that: mostly postwar and later subdivisions with simple, moderately pitched roofs — typically 4:12 to 6:12. Those profiles install quickly, need less fall protection, and generate only about 10% cut waste, versus the 12–15% that steep historic Colonials and Victorians produce elsewhere in New Hampshire.
Derry also has no historic-district overlay, so material choice is unconstrained — no slate mandate, no design review. The combination of simple geometry and free material choice is exactly why Derry prints affordable bands despite carrying the heaviest snow load in its metro.
New Hampshire does not license roofers and has no roofing trade exam. Under RSA 310-A:188 through 310-A:198, home improvement contractors register with the Office of Professional Licensure and Certification (OPLC), carrying a minimum $25,000 general liability policy. Registration confirms a business exists and is insured to the statutory minimum — it is not a competency check, because there is no exam. Verifying skill, insurance, and in-state references is your job. Confirm registration at oplc.nh.gov before signing.
Derry enforces the International Residential Code (IRC), and New Hampshire is mid-transition to the 2024 IRC: a concurrency window runs through December 31, 2026, after which the 2024 edition is mandatory statewide. Confirm which edition the Building Department is enforcing before you re-roof in 2026.
One provision is not optional anywhere in New Hampshire: the ice barrier. Under IRC R905.1.2, a self-adhering membrane meeting ASTM D1970 is mandatory at the eaves. Derry roofs use a six-nail fastening pattern for the 110 MPH design wind in Exposure Category B — the sheltered inland exposure, so the fastening schedule is standard rather than the tighter coastal spec.
Snow load is the dominant structural driver, and Derry's is the heaviest in its metro. Derry carries a 65 PSF ground snow load from the U.S. Army Corps of Engineers ERDC/CRREL study TR-02-6 — the highest in the Manchester-Nashua MSA. Even on simple suburban roofs, that load drives framing and makes drainage, flashing, and the eave ice barrier essential. It is the one factor that pushes Derry's structural requirements above its low-waste, easy-install reputation.
Ice dams are the number-one roofing failure mode in New Hampshire, and heavy-snow Derry is squarely exposed. The mechanism is freeze-thaw: heat escaping through the roof deck melts the underside of the snowpack, the meltwater runs to the cold eave and refreezes into a growing dam, and water backing up behind that dam is forced under the shingles and into the house. No shingle system sheds water uphill, which is why the code answer is a membrane.
The statewide ASTM D1970 ice-and-water barrier under IRC R905.1.2 seals the deck at the vulnerable eave so that even when a dam forms, the deck stays watertight. Attic insulation and ventilation reduce the heat loss that starts the cycle and should always be part of the job — but the membrane is the required last line of defense.
Derry's economy is anchored by a mix of local institutions and its commuter link to greater Boston. Pinkerton Academy — one of the largest high schools in New England — is a major local employer and construction client, and the nearby Manchester-Boston Regional Airport supports logistics, aviation, and facilities jobs across the southern-tier towns. Combined with the many residents who commute south to Massachusetts wages, that steady demand keeps local crews busy and supports the Manchester-Nashua MSA $25.90/hour wage.
Beaver Brook and Cobbett's Pond run through Derry, and parcels near either can fall inside FEMA Zone AE on the Flood Insurance Rate Map (check yours at msc.fema.gov). Zone AE carries a base flood elevation and triggers the 50% Substantial Improvement Rule, which can pull structural requirements into a large roofing or re-framing project on an older waterfront home. It rarely affects a simple shingle swap.
Material choice in Derry is unconstrained — no historic overlay — so it comes down to snow, wind, and budget. Within the code-required assembly (ASTM D1970 at the eaves), the four systems below cover the town's simple-roof stock.
Every figure below is a VHCI v2.0 modeled estimate for the Manchester-Nashua MSA (CBSA 31700), built from BLS wages ($25.90/hr), BEA price parity 104.165, and the 1.22 snow-and-ice modifier. Modeled estimates, not quotes.
| Material | VHCI Low | VHCI Mid (22 sq) | VHCI High | Primary Derry Driver |
|---|---|---|---|---|
| Architectural Asphalt (Class H) | $6,400 | $8,700 | $11,900 | Statewide default; simple-roof value |
| Class 4 + Class H Dual | $6,800 | $9,300 | $12,700 | Hail + wind; insurance discount |
| SBS Modified Bitumen | $7,800 | $10,600 | $14,500 | Low-slope sections & porches |
| Standing Seam Metal | $9,100 | $12,300 | $16,900 | Snow-shedding; 65 PSF metro snow |
Data: Vanderflip Home Cost Index v2.0 · BLS SOC 47-2181 Manchester-Nashua MSA CBSA 31700 ($25.90/hr) · BEA RPP 104.165 · 1.22 snow-and-ice modifier · $600 tear-off. Informational only.
Architectural-asphalt VHCI v2.0 bands scaled from the 22-square baseline.
Derry pairs the Manchester-Nashua MSA wage ($25.90/hr) with simple, low-waste suburban roofs (about 10% versus 12–15% on steep historic stock) and no historic-district overlay to constrain materials. The one upward pull is a 65 PSF snow load — the heaviest in its metro (VHCI v2.0).
The VHCI generates roofing cost estimates using U.S. Bureau of Labor Statistics Occupational Employment and Wage Statistics data (SOC 47-2181, Roofers, Manchester-Nashua MSA CBSA 31700, $25.90/hr), U.S. Bureau of Economic Analysis Regional Price Parities (104.165), U.S. Army Corps ERDC/CRREL TR-02-6 snow loads, and a regional snow, wind, and building-code modifier (1.22) sourced from state and municipal government publications. No proprietary commercial construction database is used at any stage.
These figures are modeled estimates published for educational and informational purposes only — not quotes, appraisals, or construction advice. Always obtain at least three written quotes from registered, insured contractors before acting. For a full description of the model and its inputs, see How the VHCI Works, or view statewide context on the New Hampshire roofing cost hub.
VHCI v2.0 puts a typical Derry roof replacement at $6,400 low, $8,700 mid, and $11,900 high for a 22-square asphalt roof, built from the BLS $25.90/hr roofer wage (SOC 47-2181, CBSA 31700, the Manchester-Nashua MSA), a BEA Regional Price Parity of 104.165, and a 1.22 snow-and-ice modifier with a $600 tear-off allowance.
Yes. The Town of Derry requires a building permit for a re-roof, costing about $95 — a $35 base fee plus $5 per $1,000 of valuation — with typical 2 to 5 day town-government processing. Apply at the Derry Building Department, 14 Manning Street, Derry NH 03038, (603) 432-6148.
No. New Hampshire does not license roofers and has no trade exam. Home improvement contractors register (not license) with the Office of Professional Licensure and Certification under RSA 310-A:188–198, carrying a minimum $25,000 general liability policy. Registration is not a competency check, so verify insurance and references yourself.
Derry enforces the International Residential Code, with a 2024 IRC concurrency window running through December 31, 2026. A self-adhering ASTM D1970 ice-and-water barrier is mandatory at the eaves under IRC R905.1.2, and Derry roofs use six-nail fastening for the 110 MPH wind in the inland Exposure Category B.
Derry uses a 65 PSF ground snow load from the US Army Corps ERDC/CRREL TR-02-6 study — the highest in the Manchester-Nashua MSA. That load drives framing and makes drainage detailing and the eave ice barrier essential, even on the simple suburban roofs common in town.
Heat escaping the roof deck melts the snowpack, the meltwater refreezes at the cold eave into a dam, and water backs up under the shingles. No shingle sheds water uphill, so New Hampshire mandates an ASTM D1970 ice-and-water barrier at the eaves under IRC R905.1.2. Insulation and ventilation reduce the heat loss that starts the cycle.
Derry is a Boston-commuter bedroom suburb of mostly postwar subdivisions, so its roofs are simple, moderately pitched 4:12 to 6:12 profiles that install fast and waste only about 10%, versus 12–15% on steep historic cities. Derry also has no historic-district overlay. Its wage is the Manchester-Nashua MSA rate of $25.90/hour.
They are optional but worthwhile. A UL 2218 Class 4 impact-resistant shingle — available as a Class 4 + Class H dual-rated product — resists hail and high wind and often earns a homeowners-insurance discount. On Derry's simple roofs the upgrade installs cleanly.
It can be. Beaver Brook and Cobbett's Pond run through Derry, and nearby parcels can fall inside FEMA Zone AE. Check your parcel at msc.fema.gov; Zone AE carries a base flood elevation and triggers the 50% Substantial Improvement Rule on major structural work.
Every figure comes from the Vanderflip Home Cost Index (VHCI v2.0), built only from public data: BLS roofer wages (SOC 47-2181, CBSA 31700, $25.90/hr), a BEA New Hampshire Regional Price Parity of 104.165, a 1.22 snow-and-ice modifier, and US Army Corps ERDC/CRREL TR-02-6 snow loads. No proprietary construction-cost databases are used.
Cost figures are produced by the Vanderflip Home Cost Index v2.0 from public data only: U.S. Bureau of Labor Statistics OEWS mean roofer wage, SOC 47-2181, Manchester-Nashua MSA CBSA 31700 ($25.90/hr, bls.gov/oes); U.S. Bureau of Economic Analysis Regional Price Parity 104.165 (bea.gov); a 1.22 New Hampshire snow-and-ice climate modifier; 22-square baseline; $600 tear-off allowance. Regulatory citations: home improvement contractor registration under RSA 310-A:188–198 via the OPLC ($25,000 general liability, no trade exam, oplc.nh.gov); Town of Derry re-roof permit ~$95 ($35 + $5/thousand, 2-5 day processing), Building Department, 14 Manning Street, Derry NH 03038, (603) 432-6148; 2024 IRC concurrency window through December 31, 2026; ASTM D1970 ice barrier mandatory under IRC R905.1.2; six-nail fastening, 110 MPH design wind, Exposure Category B; 65 PSF ground snow load (highest in the Manchester-Nashua MSA), U.S. Army Corps ERDC/CRREL TR-02-6; FEMA Zone AE at Beaver Brook and Cobbett's Pond, 50% Substantial Improvement Rule (msc.fema.gov). Modeled estimates for informational purposes only — not quotes or appraisals. Always obtain at least three written bids from registered, insured New Hampshire contractors. Updated 2026 · VHCI v2.0.