Gas code in New Hampshire
The fuel gas code edition in force in New Hampshire, with its effective date, the adopting authority and an official link. Factual adoption data only — confirm with your local AHJ.
NFPA 54 in force in New Hampshire
2021 NFPA 54
2021 NFPA 54 (National Fuel Gas Code)
- Effective
- August 13, 2024
- Verified
- June 28, 2026
Adopting authority
NH Division of Fire Safety (State Fire Marshal's Office) / Board of Fire Control
Authority websiteNH does not adopt the IFGC; fuel gas is governed by the NH State Fire Code, which references the 2021 NFPA 54 National Fuel Gas Code as amended by Saf-FMO 300 (RSA 153:1), effective August 13, 2024. Administered by the Division of Fire Safety / Board of Fire Control alongside the building-code statute.
State/province adoption is the baseline. Your local building department may amend it or enforce a different edition — always confirm with the authority having jurisdiction (AHJ) before you design, bid or pull a permit.
Gas code in New Hampshire: what applies on your job
New Hampshire has adopted 2021 NFPA 54 (National Fuel Gas Code) (NFPA 54) with an effective date of August 13, 2024. The body responsible for adoption and enforcement is NH Division of Fire Safety (State Fire Marshal's Office) / Board of Fire Control. This is the jurisdiction-wide baseline — your local building department may amend it or enforce a different edition, so confirm with the authority having jurisdiction before you design, bid or pull a permit.
NH does not adopt the IFGC; fuel gas is governed by the NH State Fire Code, which references the 2021 NFPA 54 National Fuel Gas Code as amended by Saf-FMO 300 (RSA 153:1), effective August 13, 2024. Administered by the Division of Fire Safety / Board of Fire Control alongside the building-code statute. The official code text is published by the standards body and is free to read online — use the official link above to read it. We link and cite the code; we do not reproduce it.
Frequently asked questions
Which fuel gas code edition is in force in New Hampshire?+
New Hampshire has adopted 2021 NFPA 54 (National Fuel Gas Code) (NFPA 54), effective August 13, 2024. The adopting authority is NH Division of Fire Safety (State Fire Marshal's Office) / Board of Fire Control. Verified June 28, 2026.
Does New Hampshire amend the base code?+
NH does not adopt the IFGC; fuel gas is governed by the NH State Fire Code, which references the 2021 NFPA 54 National Fuel Gas Code as amended by Saf-FMO 300 (RSA 153:1), effective August 13, 2024. Administered by the Division of Fire Safety / Board of Fire Control alongside the building-code statute.
What does "edition in force" mean?+
It is the specific edition of a model code (for example the 2023 NEC, the 2021 IBC, or CSA C22.1:24) that a state or province has legally adopted and currently enforces. Codes are republished on roughly three-year cycles, and each jurisdiction adopts a new edition on its own schedule — often with amendments — so the edition in force varies by place and by discipline.
Does the whole state or province use the same code?+
Not always. Many jurisdictions set a statewide or provincial baseline edition, but local building departments (the authority having jurisdiction, or AHJ) can amend it or enforce a different edition. Some states leave most adoption to local jurisdictions, and a few large cities such as Chicago and New York City run their own codes. Always confirm with your AHJ.
Which model codes does this directory track?+
In the United States: the NEC (NFPA 70) for electrical, the ICC I-Codes (IBC/IRC) for building, the UPC (IAPMO) or IPC (ICC) for plumbing, the IMC/UMC for mechanical, the IFGC/NFPA 54 for fuel gas, and the IFC/NFPA 1 for fire. In Canada: the Canadian Electrical Code (CSA C22.1), the National Building, Plumbing and Fire Codes of Canada and their provincial editions, and CSA B149.1 for gas.
How do I read the official code for free?+
NFPA offers free read-only online access to many of its standards including the NEC, and the ICC publishes its I-Codes through a free online reading room. Canadian codes are typically published by CSA Group or the National Research Council and may require purchase or membership. Each result links to the official source.
Why does this directory not show the actual code text?+
Trade codes are copyrighted by their standards bodies (NFPA, ICC, IAPMO, CSA). This directory publishes only factual adoption data — which edition is in force, when it took effect, who the authority is, whether it is amended, and where to read it officially — and links you to the official source for the code text itself.
Methodology & sources
This record was verified against NH Division of Fire Safety (State Fire Marshal's Office) / Board of Fire Control and the relevant standards body on June 28, 2026, and is next due for review by December 31, 2026. We publish factual adoption data only — never code text.
- Official state/provincial adoption authorities + NFPA, ICC, IAPMO and CSA standards bodies — verified June 28, 2026
- NH Division of Fire Safety (State Fire Marshal's Office) / Board of Fire Control — State of NH List of Adopted Building and Fire Codes (Aug 2024) and NH State Fire Code (Saf-FMO 300) noting fuel gas governed by 2021 NFPA 54, not IFGC; effective with the 2021 fire code 2024-08-13 (firemarshal.dos.nh.gov, nfpa.org). — verified June 28, 2026
Last reviewed June 28, 2026. Estimates are indicative — verify against current product specs and local requirements before ordering.
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