Here's one I wished I'd seen, we just winged it. The Purina Hen house can be scaled to fit your needs. Move doors and windows around to meet you needs.
http://poultry.purinamills.com/NUTRITIONMANAGEMENT/HenHouseHutchDesign/default.aspx
Good luck and enjoy the adventure
I winged it with mine. It's still a work in progress, I started 2 days ago. I plan for a larger ground level coop next to this raised hutch, and plan
a fenced in run.