Free houseboat plans, and almost free boat building plans the free houseboat plans section is here as a starting point to the world of building a house boat, and the.  8′ puddle duck racer one design racing sailboat based on bolger brick. developmental class, defined hull, unlimited sail rig and underwater fins.. The pontoon catamaran is a composite pontoon boat, which can be built by a first time builder. the home built pontoon boat has many options which can be customized to.