| Insulation/ Envelope | Air Leakage | Duct Systems | Mechanical Ventilation |
| Compliance Pathways | Blower Door Testing | Duct Leakage Testing | Lighting |
On September 2, 2022, New Jersey adopted a new set of Uniform Construction Codes (UCC) that includes the 2021 International Energy Conservation Code (IECC). This replaces the 2018 IECC that was previously in place.
This change will have a measurable impact on residential construction in NJ, improving the energy performance of new and renovated buildings. A detailed analysis by the US Department of Energy estimates that a house built to the 2021 codes will have an 8.66% lower energy cost than one built to the 2018 codes. As shown in the chart below, a house built to the new codes is expected to consume 50% less energy than a house built in 1975 and about 30% less energy than a house built to the 2009 IECC.
These gains (which began with the adoption of the 2015 IECC a few years ago) require that numerous enhanced construction methods be utilized by builders and verified by code officials.
The major changes include:
This website aims to provide architects, builders, contractors, and code officials with accurate and technically-sound information on the energy requirements in the NJ Building Codes.
