Ideally you should go get that coop, but you may be able to modify your current coop. Pictures would help but some tips off the top of my head: get a 4x8 sheet of plywood (or 2, I don't know how wide the opening is) and cover that open end placing it tall. Then box in the rest of that top part with more 4x8 plywood turned sideways. Remove the current roof snd put it on top. Fashion the human door of your dreams. Your coop is now 8 feet tall. Don't forget to leave ventilation when applying the new roof.I have one. Only problem is that it is open air and only 4ft tall. I need to be able to walk in and they roost on the side where rain blows in...