Plywood boat plans. if you are looking for a way to build an inexpensive boat you should definitely consider plywood boat plans. using plywood is one of the best ways. There are many designs and plans for building boats from one sheet of plywood. here are some designs and links to free one sheet boat plans. Wooden and plywood boat plans for amateur boatbuilders – excellent performance, simple construction, detailed step by step instructions for boats, canoes and.