Our Henhouse started with a 10x10 prefabricated shed from Home Depot.  I origionally divided the inside into 3 sections.  The back was a 7x10 area for my bigger birds and had a pop door leading to a run in the back of the henhouse.   The front was divided into two more sections, a 3x5 area for feed and a 3x5 brooder area.   This worked really well for a couple of years, until I decided to add rabbits!

This is our most recent work on the henhouse:

I started by adding three rabbit hutches to each side on the inside.  They are 2x3, and stand 43" above the floor so that the rabbits don't come into contact with the chickens, and the chickens cannot get  on top of the cages.

[img]http://www.backyardchickens.com/forum/uploads/418_006_2.jpg[/img]