Our coop is 8' by 12' and the roof, after we put in the floor, is about 6 feet at one end and maybe 10 feet at the other end. our yard is also 8 x 12, but we didnt put in a floor so it is more like 6 feet on one side and 12 or 13 feet tallon the other. . we are expanding our yard to 12' x 20' though because we have new chickens and ducks.
