The Massachusetts Stretch Energy Code raises the bar for new construction and major renovations beyond the base energy code. Most communities in the state have adopted it, and many have moved to the Specialized Code.
Base Code vs Stretch Code
The base code sets a minimum standard, while the Stretch Code requires measurably better energy performance, typically verified through a HERS rating. Builders choose a performance pathway and must hit a target HERS score for the project to pass.
What Compliance Involves
Meeting the Stretch Code usually means improved insulation, high performance windows, tighter air sealing, efficient mechanical systems, and field verification through blower door and duct testing. A rater models the design and confirms the finished home meets the target.
The Specialized Code
Many Massachusetts municipalities have adopted the Specialized Opt-in Code, which pushes further toward net zero ready construction, including provisions for electrification and solar readiness. Requirements vary by town, so it is important to confirm what applies to your project location.
Plan Early
The earlier energy targets are built into the design, the smoother and cheaper compliance becomes. We help builders choose the right pathway from day one. Reach out for guidance specific to your town.