Typically, corner sheds fit into a corner and run about 3 feet tall x 3 feet wide and about 2 feet deep. a vertical shed runs about 5 feet tall x 4 feet wide and 3 feet deep. a horizontal shed runs about 3 feet tall x 5 feet wide and 4 feet deep. more importantly, you should know the material you want, as well.. Where the shed of hope is to be placed before setting the pads in the yard . door/ front . at least 2 1/2’ from any obstruction on the back . note: this is the most important step in the shed set-up. get it right and your roof will go on right. set blocks 12”x12”x 2” dig through the grass and get down to a firm foundation.. A shed is typically a simple, single-story roofed structure in a back garden or on an allotment that is used for storage, hobbies, or as a workshop.sheds vary considerably in their size and complexity of construction, from simple open-sided ones designed to cover bicycles or garden items to large wood-framed structures with shingled roofs, windows, and electrical outlets..