Barn shed plans free gambrel shed plans building a barn shed is a fun project, as it is a great opportunity to learn new woodworking techniques and to build a beautiful rustic construction.. 15 free shed building plans. many of them will include a material list and are super easy to follow. get your garden or storage shed started with the help of these instructions. remember to check with your local building authorities for the requirements and permits you may need.. Part 1: 12