A building permit is required for all sheds and accessory structures. In addition to the normal requirements of the Building Code, we are concerned with the location of the shed in relation to zoning setbacks, the location of wells or septic systems, and other utilities. In general, the location of the shed is based on the size proposed.
The Building Department has a detailed handout (PDF) that explains the requirements and setbacks for various-sized outbuildings. Usually, a plot plan or sketch showing the proposed location of the structure will be required as part of the permit application.