Hey, I recently finished my rabbit hutch and am not planing one for the chickens. It'll be used for chicks and sick or injured birds. It's a stand alone lean to and it will be between the coop and well house. It's more shaded in that spot, easier to see and a little more safe from anything that might want to take a bite outta them. No back, it will be against the coop. Front and sides will be wire w/solid wood for winter, bottom just wire. Haven't measured the space, but thinking about 8ft long, 2ft deep and 1.5ft front w/a 2.5ft back.