As of April 7, 2025, Maine has enacted updated statewide building codes aimed at enhancing the safety, energy efficiency, and sustainability of residential and commercial structures. These revisions to the Maine Uniform Building and Energy Code (MUBEC) align the state with contemporary national standards, ensuring that new constructions and renovations meet modern requirements for structural integrity, energy conservation, and indoor air quality.
The updated MUBEC incorporates the 2021 International Residential Code for residential buildings and the 2019 International Building Code for commercial structures. These changes mandate increased insulation in floors and walls, which the U.S. Department of Energy estimates could save homeowners hundreds of dollars annually on utility bills. Additionally, improved ventilation and radon protection measures are expected to enhance indoor air quality. Municipalities with populations exceeding 4,000 are required to enforce these codes, while smaller communities may choose to adopt them voluntarily.
To support the implementation of these new standards, the Governor's Energy Office is offering training sessions for builders and code enforcement officers across the state. These sessions aim to facilitate the transition to the updated codes and promote the construction of long-lasting, low-carbon structures.
The adoption of these updated building codes represents Maine's commitment to creating safer, more energy-efficient, and healthier living and working environments for its residents.