The first consideration when placing your coop in your yard is to pick a spot that drains well - you do not standing water inside your coop. High ground is dry ground! The second consideration is to position it in a place that makes it most convenient to water and feed your chickens. Pick a spot near a hose bib so you aren't having to drag a hose across your yard to water your chickens. A reasonably sunny spot is also good as it will help dry up your coop.