Take this advice -- build a walk-in coop big enough for you to stand up in, and include a storage space separate from the chicken space. This allows you to store bedding, food, etc, in the coop, without it getting pooped on. My coop is 12 by 8 feet long. There is an interior wall 4 feet from the door that is framed and covered in hardware cloth, with a screen door. This gives the girls 8×8 feet, and leaves me a 4x8 space for storage. I'm also happy that I put a trap door in the middle of the floor so that I can clean out the coop pretty easily.