Massachusetts has recently revamped its energy stretch code to make it more energy efficient. 300 cities and towns in Massachusetts currently follow the stretch code through their Green Community designation by the Department of Energy Resources. All buildings permitted on or after January 1, 2023 must follow the new stretch code requirements. What does this mean for cities and towns who follow the stretch code? This resource summarizes all new provisions and changes in the 2023 update to the Massachusetts energy stretch code for residential buildings.