New Hampshire

9 adopted codes · 22 cities tracked

Complete GuideNH State Building Code (based on 2018 ICC Codes with NH Amendments)Edition 2018Effective: 2019-09-15

State Building Authority

NH Building Code Review Board / Dept of Safety - Fire Marshal

(603) 223-4289 [email protected]Official Website

Adopted Codes & Standards

NH State Building Code

Statewide - Mandatory

Based on 2018 ICC Codes (with NH Amendments)

International Building Code (IBC)

Commercial/Multi-family

2018 with NH Amendments

International Residential Code (IRC)

One/Two-family Dwellings

2018 with NH Amendments

International Existing Building Code (IEBC)

Existing Buildings

2018

International Mechanical Code (IMC)

Mechanical Systems

2018

International Plumbing Code (IPC)

Plumbing Systems

2018 with NH Amendments

International Energy Conservation Code (IECC)

Energy Efficiency

2018 with NH Amendments

National Electrical Code (NEC/NFPA 70)

Statewide - Electrical Systems

2023

NFPA 101 - Life Safety Code

Fire/Life Safety

2021

ASCE 7 - Minimum Design Loads

Referenced - Structural Design Loads

2016

Mandatory Codes (9)

IBC2024Amended

International Building Code

ICC·Building

Statewide

IEBC2024

International Existing Building Code

ICC·Existing Buildings

Statewide

IECC2024Amended

International Energy Conservation Code

ICC·Energy

Statewide

IMC2024

International Mechanical Code

ICC·Mechanical

Statewide

IPC2024Amended

International Plumbing Code

ICC·Plumbing

Statewide

IRC2021

International Residential Code

ICC·Residential

IRC 2021 adopted statewide

IRC2024Amended

International Residential Code

ICC·Residential

Statewide

NFPA 702023

National Electrical Code

NFPA·Electrical

NEC 2023 adopted statewide

NFPA 702023

National Electrical Code

NFPA·Electrical

NEC 2023 statewide

Important Notes

NH has MANDATORY statewide building code. Uses 2018 ICC codes. Very high snow loads in White Mountains (100+ psf). No state income tax or sales tax.