i have a coop area that is 4'x4' and 8' high. the run area attached and open is 8' long, and 4' wide, and 8' high. i have 5 chickens in there now, seems to be plenty of room for them. i plan to free range most days for about half days. how many do you think would be comfortable in there? also- im finishing the coop, how high do you put your roosts? and how high do you put nest boxes? ive read to put roosts higher so they wont sleep/poop in the boxes..