My son and I am planning on building a shed for extra storage. At my parents house we have a cement slab on the side of the house that measures out to be a pretty good size with the wood fence on the other side. The space measures approximately 10ft by 20ft I wouls like to build the storage shed along the outside wall of my parents house. I am looking for 6ft wide by 10 foot in length. Can you help with suggestions?