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New Hampshire roofing: permits, codes and approvals

New Hampshire's statewide building code (2021 IRC), local re-roof permits, no state roofing license, and the RSA 447 mechanic's lien with its 120-day attachment deadline.

1 · Product approvals

Product approvals

New Hampshire has no state roofing product approval or listing system. Inspectors rely on the code's labeling requirements and evaluation reports.

Code evaluation reports (ICC-ES, UL, IAPMO): 48 roofing reports
2 · Permit forms

City re-roof permits

There is no statewide re-roof permit rule. The state code applies everywhere, but each city or town decides how roofing permits work. Check with the local building department.

RochesterRe-shingling (re-shingle only) goes through the city's Express Building Permit for a flat $10 fee, and the application must be approved before work starts. Other roof work falls outside the express permit.
3 · Code rules

Code rules

The New Hampshire State Building Code includes the 2021 IRC and 2021 IBC with the 2018 IECC, effective July 1, 2024 (HB 1059). It applies to every municipality, and towns may only adopt stricter rules. Official adoption page ↗

2021 IRC statewideHB 1059 (approved Aug. 2, 2024) put the 2021 IRC and IBC in place, retroactive to July 1, 2024. Through Dec. 31, 2024, applicants could pick the old or new code, but not mix them.Check Building Code Review Board amendmentsThe State Fire Marshal says the Building Code Review Board adopts New Hampshire amendments to the model codes, so check them before relying on the IRC text.
5 · License and insurance

License and insurance

We found no state license or registration for roofing or home improvement contractors in New Hampshire. Check the city or town for any local registration.

6 · Lien and contract forms

Lien and contract rules

Contractors who work under a contract with the owner get a lien for labor and materials. It lasts 120 days after the work is done and is secured only by attaching the property through a court action within that time.

Who has a lien (RSA 447:2)Anyone who performs labor or furnishes materials worth $15 or more to build or repair a building under a contract with the owner. The lien covers the structure and the owner's interest in the lot.120-day limit (RSA 447:9)The lien lasts 120 days after the services are performed or materials are furnished. To keep it, attach the property during that window (RSA 447:10), and state on the writ that it is to secure the lien.Notice from subs and suppliers (RSA 447:5-447:6)A sub or supplier hired by the contractor must give the owner written notice that it will claim a lien. Notice before starting protects the full amount; later notice covers only what is still due or comes due to the contractor.Itemized account every 30 days (RSA 447:8)A sub or supplier claiming a lien must give the owner a written account of the labor and materials at least once every 30 days so the owner can hold back enough to cover it.

Install instructions by brand: all makers →

Public records, last checked Oct 23, 2026. Always verify on the official source before you permit.