It's a 5x4 Rubbermaid shed, available at Lowes for less than 400.00. I mounted it to a pressure treated base to ensure water and excessive mud wouldn't be able to run in. I like it because it looks nice, is very weather resistant, and offers plenty of space for 1-6 chickens. I mounted a heat lamp in there, plugged into a timer, to keep the chickens waking up around 5:30 am. It also allows me to add some warmth when the temp stays below 20 degrees.