I built my coop inside a 16 x 16 shed....more deets on My Coop Page.
6 x 12 for the main flock, I have ramps because there were some crashes when flying off roost boards and some of the larger girls are not so limber so the nest perch is now a 2x4 instead of 2x2:

4x6 partitioned off with separate run for the junior flock, the bad cockerel or right now it's broody pen.

6 x 12 for the main flock, I have ramps because there were some crashes when flying off roost boards and some of the larger girls are not so limber so the nest perch is now a 2x4 instead of 2x2:
4x6 partitioned off with separate run for the junior flock, the bad cockerel or right now it's broody pen.