Does the stretch code apply to minor additions to existing buildings?
Additions to existing buildings that are large enough to require code compliance are treated in the same way as new construction for commercial buildings, and in the same way as renovations in residential buildings. In both cases additions can elect to follow the performance approach to code compliance or a simplified prescriptive path. In the case of residential additions, this requires following the Energy Star Homes program National Builders Option Package (BOP), which results in modest, cost-effective, increases in energy savings over those already required by the new Massachusetts base code.
