Welcome to BYC. Glad you decided to join our flock. X2 on dheltzel and the 4 sq. ft. and that doesn't include the space taken up by the nesting boxes. Also if you are not free ranging and have an attached run to the coop, you need at least 10 sq. ft. per bird in the run. These numbers are bare minimums. More space is better as overcrowding can quickly lead to aggression, fights, biting and feather plucking, and even cannibalism. Please feel free to ask any questions you may have. We are here to help in any way we can. Cheers.