Is your state behind on building code? Per-state NEC/IRC/IECC lookup
Pick a U.S. state to see its adopted NEC, IRC, and IECC editions, how many editions behind the current published baseline each one is, what that means for your permit, and a link to the full per-state breakdown — every value computed live from public building-code adoption status. 'Behind' describes which book a permit office is on, not how safe a state is.
Last reviewed Next data refresh: Q3 2026Ohio is 4 editions behind in total across the codes with a comparable edition. This is permitting/inspection context — not a safety rating.
- Adopted
- NEC 2023
- Current published
- NEC 2023
- Adopted
- IRC 2018
- Current published
- IRC 2024
- Adopted
- IECC 2018
- Current published
- IECC 2024
“Editions behind” is factual arithmetic on published model editions against the current baseline (NEC 2023, IRC 2024, IECC 2024) — it tells you which book a permit office is enforcing, NOT how safe a state is. Older-edition states are not “unsafe”; a newer book mostly adds requirements (energy, AFCI/GFCI, ventilation) on top of an already-protective code. Where a state has no single comparable statewide edition, or where local amendments (e.g. NYC, DC) apply, we say so and never guess. For the deeper per-state picture, open the linked breakdown.
“Behind” means the permit book, not the safety
The number next to each code is how many published model editions a state's adopted edition trails the current baseline — NEC 2023, IRC 2024, IECC 2024. It tells you which edition a permit office is enforcing, which matters for what an inspector will (and won't) require on your job. It is not a verdict on how safe the state is: a newer edition mostly layers on requirements — energy efficiency, expanded AFCI/GFCI protection, ventilation — over a code that is already protective. Where a state runs a state-developed standard or lets local authorities set the edition, there's no single comparable statewide year, so we show the adopted text verbatim and say so rather than guess. The cited baseline and source are the same the full study uses.
Hand the question to your preferred assistant — it will use ProFix Directory's open MCP server and llms.txt as context.