Hi Poka Bee;
I tried our local library. No luck. I ty them again though. The pre-build sheds are two much dough for us to justify. We'll keep looking around. Best wishes, Winenutguy
I guess I shoulda shown you what I was planning on doing building my new hen house when you were down. Maybe next time around.
for nest boxes plan on 14-16 inch cube for chickens the size of an Australorp to Jersey Giants. The nest boxes on sale from most hatchery catalogs are 12 inch cubes and a bit small for the larger chickens. Believe when I say if the nest box is too small the chicikens will lay on the ground instead of the box.
You need a small feed room or lean to, at least 12 inches of linear space per chicken on the roosts(more is better), and 4 sq feet per bird in the hen house besides the chicken yard. The nests should have slanted bottoms sloping towards the direction you'll be collecting the eggs from. The ceiling shouldn't be more than 6 inches above your head. Too much head room and the chickens will start roosting in the rafters, which means they'll start flying over the fence. An 8X8 shed should work for your needs (that's 64 sq feet).
The chicken entrance can be placed under the nest boxes if layout is a problem. Also put in a double row of nest boxes with perch in front. 6 nest boxes will do up to 30 chickens. They like to lay in the same nests as the other chickens but you need enough so several can lay at once. It's not unusual for me to go out and find 6 or more eggs in the same nest box.