Building a Storage Shed Free Plan Designs - New Garage Designs and Storage Shed Floor Plans. Sample free barn building floor plans of new construction designs of sheds, garages, and pole barns. Designs of small storage sheds you may use in your backyard by your garden, or if you are looking to build a backyard wood shed, to construction plan designs of large car garage plans with lofts and extra storage space such as gambrel storage sheds where the steep first roof slope creates the extra attic storage space. 2 and 3 car shed plans are the most common size plans in our collection of free garage plans, although we do include building plans of 4 car garages to small garden sheds and 1 car small storage garage building plans as well.