The walls are plywood with electrical conduit for the roof. On the front i put a water porch with wood slat floor to keep the bedding dry, when they got bigger i turned it into a nest box. I move the house in the garden during the winter so they fertilize all winter, then back to the yard for growing season.
Our run has been a work in progress this year. New two story deck with doghouse to expand their space. Doghouse was free at curb and refurbished.
Pool deck finally up too. 40 gallon cement mixing tub with a drain that empties outside of the run. Top of deck is recycled
wood fence boards. Took a bit but they do great with the ramps