Ok, so I'm building it 4x4x4ish with roosts, how many chickens will this handle? Figuring that they will most likely be free ranged, but winter would probably bring them in most the time. I know you figure 4 sq feet of floor space per chicken, but with the roosts, will that increase the allowable space any? Can I sneak another chicken or two in without issues? I'm putting the nesting box(s) on the outside.
Also, I'm not insulating it, but I am making it 2 x 2 construction with double walls. Will that be enough for single digit winters?
I will raise it 1 foot off the ground for rodent control.
Anything else I should think about?