New Jersey — Code Adoption Summary
Adoption model: Statewide-mandatory Uniform Construction Code (UCC) (Dept. of Community Affairs). Uniform subcodes; local enforcement.
Last verified: 2026-07-03
Confidence: verified (energy edition — confirm current cycle)
Primary sources: NJ DCA, Current Construction Codes — https://www.nj.gov/dca/codes/codreg/current.shtml · ICC NJ
Statewide adopted codes — 2021 I-Codes family (adopted Sept 2022)
| Code family | Adopted edition | Notes | Source |
|---|
| Building | 2021 IBC (UCC Building Subcode) | | nj.gov/dca |
| Residential | 2021 IRC | | " |
| Electrical (NEC) | NEC 2020 (National Electrical Code Subcode) | | nj.gov/dca |
| Mechanical | 2021 IMC | | " |
| Plumbing | 2021 National Standard Plumbing Code (NSPC) — NJ uses NSPC, not IPC/UPC | distinctive | nj.gov/dca |
| Energy | 2018 IECC (low-rise residential) + ASHRAE 90.1-2016 (commercial/other) ⚠ confirm current cycle | may have updated since 2022 adoption | energycodes.gov/status/states/new-jersey |
| Fuel Gas / Fire | 2021 IFGC / UCC Fire Protection Subcode | | nj.gov/dca |
Adoption model & precedence
- UCC subcodes are uniform statewide; municipal construction offices enforce.
- Local technical amendments are not generally permitted (NJ is strongly uniform).
- AHJ = municipal construction official.
Major cities / counties
| Jurisdiction | County | Notes | Building dept. |
|---|
| Newark | Essex | UCC | newarknj.gov |
| Jersey City | Hudson | UCC (Construction Code Communicator guidance) | jerseycitynj.gov |
| Paterson / Elizabeth | Passaic / Union | UCC | respective offices |
AHJ fallback (when local adoption is unverified)
- State baseline: 2021 IBC/IMC, NEC 2020, NSPC 2021, energy per current UCC energy subcode.
- Action: confirm the current energy subcode edition with NJ DCA (the 2018 IECC/90.1-2016 figure dates to the 2022 adoption and may have advanced).
Change log
- 2026-07-03 — created; verified 2021 I-Codes + NEC 2020 + NSPC 2021 (Sept 2022 adoption). Energy edition flagged for re-check.
