ETA: How much space does 1 bird require in a coop? I have a 4x4 coop already built, It has 2 roost bars and a large nesting box (was supposed to be 2 but i messed up and didn't wanna re-do). I do plan on adding 2 more boxes on the outside of the house. I plan on putting it on stilts in the new run, for extra room. I don't wanna ruin it's cute-ness by building onto it so I have decided to make a new one, like it, to go in with it.. I just don't know how much more coop space i'll actually need. I am planning on keeping the following birds: 1 Cochin Roo 2 Cochin Hens 1 RSL hen 1 EE hen 2 WLH hens 1 BA hen These are my most steadily laying girls, my 2 sitters and my favorite roo.