Free plans: absolutely free plans (links to free online boat plans) ariawood boat works (plywood punts, jonboats and one-sheet boats) architectura navalis mercatoria. Houseboat plans can give you a start in planning your houseboat building project. check out these free or low cost houseboat plans. Intro: building a wooden boat. this instructable contains my plans and method for building a boat. it is written as a journal. i’m a novice so please don’t expect.