Backyard Chickens website is full of fabulous projects and articles about chickens of all ages.
I have to say this is a fabulous chicken coop but you could almost use this design with a few modifications to build a greenhouse.
Click here to view how to make this project:
Chickens In Your Backyard: A Beginner’s Guide
The Small-Scale Poultry Flock: An All-Natural Approach to Raising Chickens and Other Fowl for Home and Market Growers–With information on building … feed, and working with poultry in the garden
Free-Range Chicken Gardens: How to Create a Beautiful, Chicken-Friendly Yard
Wood Chicken Coop Rabbit Hen House Nest Huge Run Backyard Poultry Cage
5×6 Prefab Chicken Coop KIT – Eastern US
Ware Manufacturing Premium Plus Chick-N-Villa Chicken Villa