New Jersey residential energy code

New Jersey residential energy code (2024 IECC residential with New Jersey amendments (N.J.A.C. 5:23-3.18))

As of 2026-10-22. DOE's Building Energy Codes Program (energycodes.gov) lags state adoption, so where a state's own rule was read it governs and DOE's differing figure is noted. Residential means one- and two-family dwellings and townhouses. Local amendments can apply; check the code body before relying on a section.

Key features

Code in force: 2024 IECC residential with New Jersey amendments (N.J.A.C. 5:23-3.18)
In force since: 2026-08-17
Adoption: Statewide code, enforced by local governments
Appendices RB, RE and RK are optional at the permit applicant's discretion.
Verified against the state's own adopted rule or code-body page.

Governing body

State of New Jersey

Region

Applies to

General contracting HVAC Insulation Electrical Windows & doors

Visit State of New Jersey ↗