My friend done exactly this... Now trying to remember what she done... The back wall was all nesting boxes from about 1ft off the ground with roosting beam underneath - then a side wall were alternating roosting beams and nesting boxes (so that the birds underneath didn't get a splat from those on top!) She had a section that was storage (food, mite cleaner etc - it was totally boxed in with a padlocked door and a flat top useful for, well, whatever it was needed for. She also had a a bit down low with a couple of nesting boxes caged off from the rest that had access to to outside pre/run but was also sectioned off from the main run so she could use it for broody hens... She would move them down there when they had laid and were broody, and they had an indoor run that then opened to the enclosed outdoor run so that new chicks had their own space with indoor warmth to start and could go out side when ready without total integration into main flock but still so they could see each other so it was easier to let them mix when ready. I think she had a headlamp in that section too.
She popped some big branches in so the birds could access the higher boxes and roosting beams and also have a bit of fun on (especially in the winter in the snow when they didn't want to go out). It's wasn't a huge shed she had but the way she laid it out was brilliant. Ohhhh she also popped trays on top of the nest boxes that had the roosting bars above it for easy cleaning (she done that after the birds moved in to make life easier... She built a wee lip on top of the nest boxes so the trays didn't slip off)
Think that was all she had in it but it was totally awesome and converted it in a weekend.
Good luck. Cannot wait to see the after pictures!!
Scottish Hen
