Just please be aware of the problems that can arise if your birds out grow your coop, and you insist on keeping them in there. Over crowding can lead to all sorts of problems, from feather picking and laying problems, to as extreme as cannibalism. Yes, overcrowded birds can get so stressed that...
http://www.tractorsupply.com/en/store/precision-pet-products-tsc-hen-house-coop-green-white-carb-compliant
This one? It's way too small for 4 adult buff Orpingtons.
They will only comfortably house half the amount of adult birds that they claim to. If you bought a coop that claims to house up to 4 adult hens, their estimates are based off of battery farm chicken housing. The coop would only be suited to 2 small breed hens. If you tried to keep more birds or...
Those prefab coops are adorable, but they will only house half of what they claim to, they start to fall apart and leak after a few months of hard weather, their simple latches are not raccoon proof, and they are not digging predator proof. They just simply are not a good choice for long term...