A simpler method is to build your shed floor like a deck, with footings, posts and a wood frame covered by plywood. if you don’t like the opening under the shed, build a skirt to cover the space between the shed floor and the ground. since locating buried utilities is free, it doesn’t make any sense to skip this step.. If after checking out the benefits, you too planning for having a shed in your garden, the first of all you have to make a proper plan. no worries. go through the following tips. how to plan a perfect garden shed? first of all, focus on the purpose of the shed. pen down the tools you want to keep in the shed.. Garden shed size. the size is a crucial factor to consider while buying the shed. a 6’ x 4’ garden shed is sufficient to store some household clutters and few gardening items. opt for larger 8’ x 6’shed to store some bicycles and lawnmower. for diy projects or hobbies, it is ideal to use a 10’x10’ shed..