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New Hampshire · Building code

The building code in force in New Hampshire now.

NH State Building Code: 2024 IBC/IEBC/IPC/IMC/IRC/ISPSC + 2023 NEC + 2018 IECC (RSA 155-A:1,IV). Enforced by Municipal local enforcement agency is primary; the state fire marshal enforces only where a town has no local agency or third-party contract and asks in writing (RSA 155-A:7). Checked on the primary source; the state record was last reviewed 2026-11-12.

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Building code in New Hampshire

Checked on the source
In force

NH State Building Code: 2024 IBC/IEBC/IPC/IMC/IRC/ISPSC + 2023 NEC + 2018 IECC (RSA 155-A:1,IV)

RSA 155-A:1,IV names 2024 IBC/IEBC/IPC/IMC/IRC/ISPSC, 2023 NEC, 2018 IECC, with board amendments approved as of October 10, 2025, subject to ratification. History lists 2025 and 2026 amendments effective July 1, 2026. CONFLICT: the Fire Marshal's codes page still lists 2021 I-codes and 2020 NEC. RSA 155-A:7,VI (eff. July 1, 2027) adds statewide alternative-method approvals.

Source: primary document

Who enforces it

Municipal local enforcement agency is primary; the state fire marshal enforces only where a town has no local agency or third-party contract and asks in writing (RSA 155-A:7)

Statewide layer. County and city amendments sit on top; confirm the local office for the address.

What changes next

In force

In force (2024 editions)

What a building has to do

1 recurring duties

These apply when the building has the equipment or fits the type named. The frequency is the standard one; your local official can set a stricter one, so confirm it for the address.

Monthly
Accessible pool entry: a pool lift or sloped entry in place and working whenever the pool is open (pools with 300 or more linear feet of wall need two accessible entries; a spa needs one: lift, transfer wall or transfer system); the rule sets no inspection interval; a monthly check that it works and is charged is common practice2010 ADA Standards §242 and §1009; 28 CFR 36.211 · U.S. Department of Justice (enforced through complaints and lawsuits) · Checked against the source 2026-09-28.

Questions about the building code in New Hampshire

Which building code applies in New Hampshire today?

NH State Building Code: 2024 IBC/IEBC/IPC/IMC/IRC/ISPSC + 2023 NEC + 2018 IECC (RSA 155-A:1,IV). RSA 155-A:1,IV names 2024 IBC/IEBC/IPC/IMC/IRC/ISPSC, 2023 NEC, 2018 IECC, with board amendments approved as of October 10, 2025, subject to ratification. History lists 2025 and 2026 amendments effective July 1, 2026. CONFLICT: the Fire Marshal's codes page still lists 2021 I-codes and 2020 NEC. RSA 155-A:7,VI (eff. July 1, 2027) adds statewide alternative-method approvals.

Who enforces the building code in New Hampshire?

Municipal local enforcement agency is primary; the state fire marshal enforces only where a town has no local agency or third-party contract and asks in writing (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 codeNFPA 101 (Life Safety Code) 2024 edition and NFPA 1 (Uniform Fire Code) 2024 edition, as a…ElevatorsLatest American Standard Safety Code (ASME A17.1 series) for units installed after Jan. 1,…BoilersASME Boiler and Pressure Vessel Code + National Board Inspection Code, adopted through com…Pools and spasPublic bathing facility law (RSA 485-A:26) + NHDES rules Env-Wq 1100Hotels and lodgingNo state hotel safety or operating license; hotel/dormitory chapters of the state fire cod…Workplace safetyFederal OSHA (no NH State Plan)

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