Free pontoon boat plans. well look what we have cooking here: free plans to make your own pontoon boat! length: 12′ (3.7 m). 1 sheet + is an attempt to make a nice looking, good performing small boat out of a single sheet of plywood. with a 30" beam and a length of 88", the boat achieves 4. Canoe, kayak, and other boat plans for the amateur boat builder..