our 4 peeps are only a month old now, so the only free-ranging that they do so far is in my family room (they like the spider-man bigwheel - peck peck peck!).
but when they're old enough, they'll be going to live in their coop w/attached run in the backyard. their run is about 8x5. this winter we're going to build a smaller tractor-like thing for them to spend a little more time in the yard without direct supervision that we can move around the yard for them - it won't really be predator-proof, just chicken-escape proof. they'll have free range time in the whole back yard when we're out there with them (maybe 1-2hrs a day). we're smack in the middle of town, neighbor's houses and ours are probably 15-20ft apart. our lot is probably .30 acre. not the teensiest, certainly not a homestead!!!
sooooo, they'll be free-rangin' for all they're worth (and probably trying to expand their territory to our neighbors' yards....) in the space we've got. i should mention 2 things: back is completely fenced, with gates on both sides of the house, so they can't get to the front yard; we love our neighbors on both sides (they're already lobbying for eggs!) so if the girls do stage a break-out, they'll be safe in neighbor yards. i have been contemplating how to i.d. tag them (my dogs and cats are microchipped, but somehow.....) so that if they did manage to go wandering around out front they'd get plopped back at the right house..........