It's called a Dorking Chicken Coop. There is a triangular, tent-shaped cage that is sold separately. By Oakdene Coops.(It looks a lot like a dog house with legs to me!)
Very pretty! Great for a few hens in an urban or suburban backyard.
The "Palais de Poulets," aka Clucking Hen Garden, belongs to a couple outside of Seattle. They transformed an old ugly shed into the work of art you see here. "A flock of heirloom chickens" (whatever that is) reside there. I admit it: I'm a bit envious.