New Hampshire · Building code

The building code in force in New Hampshire now.

NH State Building Code: 2021 IBC/IEBC/IPC/IMC/IRC + 2023 NEC + 2018 IECC (RSA 155-A:1,IV). Enforced by Municipal local-enforcement agency is primary; state fire marshal enforces only if a town has none and asks (RSA 155-A:7). Reported, in verification, re-checked weekly.

Enter a New Hampshire ZIP code for the building view

Building code in New Hampshire

Reported, in verification

In force

NH State Building Code: 2021 IBC/IEBC/IPC/IMC/IRC + 2023 NEC + 2018 IECC (RSA 155-A:1,IV)

Adopted by reference; amendments ratified through April 2025. Includes the 2021 Intl Swimming Pool and Spa Code. Energy code (IECC) is the oldest of the set, at 2018.

Source: primary document

Who enforces it

Municipal local-enforcement agency is primary; state fire marshal enforces only if a town has none and asks (RSA 155-A:7)

Statewide layer. County and city amendments sit on top; the building view resolves them from your ZIP.

What changes next

In force

In force, nothing scheduled

Questions about the building code in New Hampshire

Which building code applies in New Hampshire today?

NH State Building Code: 2021 IBC/IEBC/IPC/IMC/IRC + 2023 NEC + 2018 IECC (RSA 155-A:1,IV). Adopted by reference; amendments ratified through April 2025. Includes the 2021 Intl Swimming Pool and Spa Code. Energy code (IECC) is the oldest of the set, at 2018.

Who enforces the building code in New Hampshire?

Municipal local-enforcement agency is primary; state fire marshal enforces only if a town has none and asks (RSA 155-A:7).

What changes next for the building code in New Hampshire?

Nothing is scheduled. The rule above stays in force until the state adopts a newer edition or amends the program; AHJ Radar re-checks the source weekly.

Other areas in New Hampshire

Everything in force in New Hampshire

Fire codeState fire code = NFPA 101 (2021 ed.) Life Safety Code + NFPA 1 (2021 ed.) Uniform Fire Co…ElevatorsASME/ANSI A17.1, current edition by reference (RSA 157-B); no separate A17.3 citation foun…BoilersASME Boiler and Pressure Vessel Code + National Board Inspection Code, edition not specifi…Pools and spasPublic bathing facility design review + self-certification program (RSA 485-A:26 to :28)Hotels and lodgingNo standalone hotel-licensing statute found; hotel/dormitory occupancy provisions of the s…Workplace safetyFederal OSHA (no NH State Plan)

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