We started with 2 pallets as a base. Added legs so it was at a comfortable height to clean, then built around it from there! Plywood floor (over the pallets), plywood walls with windows, and roof of plywood with roofing shingled. We covered the windows with real good small wire so it is super safe and added a real big door on the back so we can open it up and rake it all out. Easy to clean is awesome!