Building Energy Code

May 23, 2023


NOTE: Much of the information presented in this summary is drawn from the U.S. Department of Energy’s (DOE) Building Energy Codes Program and the Building Codes Assistance Project (BCAP). For more detailed information about building energy codes, visit the DOE and BCAP websites.

The New Jersey Uniform Construction Code Act provides that model codes and standards publications shall not be adopted more frequently than once every three years. However, a revision or amendment may be adopted at any time if a commissioner of community affairs finds that imminent danger exists to the public's health, safety or welfare.

On September 3, 2019, New Jersey adopted the 2018 International Energy Conservation Code (IECC) with amendments as the new residential code and ASHRAE 90.1-2016 as the new commercial code. 

On September 6, 2022, New Jersey adopted the 2021 IECC with amendments as the new residential code and ASHRAE 90.1-2019 without amendments as the new commercial code.

The New Jersey Department of Community Affairs, Division of Codes and Standards enforces the code through licensed code officials. Click here to access New Jersey's building energy code.


On September, 2015, New Jersey adopted the 2015 International Energy Conservation Code (IECC) with amendments and ASHRAE 90.1-2013 with minor amendments as the new commercial code. There was a grace period until March 7, 2016 while the state transitioned to the new code. Until that time, permits were given for buildings which met the previous code requirements of 2009 IECC and ASHRAE 90.1-2007. 

Program Overview

Implementing Sector: State
Category: Regulatory Policy
State: New Jersey
Incentive Type: Building Energy Code
Web Site:
Administrator: New Jersey Department of Community Affairs
Start Date:
Eligible Renewable/Other Technologies:
  • Comprehensive Measures/Whole Building
Residential Code: 2021 IECC with amendments
Commercial Code: ASHRAE Standard 90.1-2019 without amendments
Code Change Cycle: Three-year code cycle concurrent with the publication of new editions of the model codes. The most recent code update took effect September 2021.
Jurisdictions: Applies throughout the State with limited exemptions for health care facilities, on-site water supply and sewage disposal systems, and commercial farms.


Name: N.J.A.C. 5:23-3
Date Enacted: 04/04/2016


Name: Robert Austin
Organization: Department of Community Affairs
Address: 101 S. Broad St.
Trenton NJ 08625-0802
Phone: (609) 984-7609

This information is sourced from DSIRE; the most comprehensive source of information on incentives and policies that support renewables and energy efficiency in the United States. Established in 1995, DSIRE is operated by the N.C. Clean Energy Technology Center at N.C. State University.