Beyond new construction or interior alterations or additions, a building permit is required for such projects including but not limited to roofing, siding, new or replacement windows and doors, decks, porches, pools, dormers, sheds, garages, walls, and changes in grade. A good rule to follow is that if you are unsure to contact the Building Division at 781-794-8070. View a digital
Residential Building Permit Application (PDF).