NH
New Hampshire Building Codes
Current base code, county-level adoption data, special-zone overlays, and source links for restoration contractors.
Counties
10
ZIPs
285
Special zones
186
Local amendments
0
Current State Code
Verified state-level adoption record from SkyCanvass jurisdiction data.
Adoption model
statewide
Base code
irc_2021
Effective date
2019-09-14
Next update
Not scheduled
New Hampshire State Building Code based on 2018 I-Codes. Administered by State Fire Marshal. Local enforcement varies. Climate Zones 5A/6A. Ice barrier required. Heavy snow loads. 10 counties.
County Guides
County pages include local code editions, amendment flags, and jurisdiction-specific links.