My coop is 4 x 12 partioned area of my 12 x 30 shed. My husband built the entire thing, with a little help from me I've got 5 nesting boxes, poop board/roosts, few windows. The outside area is still a work in progress, but is 12 x 20, 1/2 mesh will have some roosts there as well.
I'm snake paranoid, and I kept saying this will be tighter than Fort Knox, so I'm calling it Fort Pox
My chicks are just 2 weeks old so haven't moved outside yet