Never having chickens, we researched to find what we wanted to build. We started with an old grape trellis and went from there. The coop is approximately 4'X4' and the run is just over 4'x12'. The coop also has a door that opens to allow full entry to clean, a nesting box with a flip open door and prop to gather eggs and an entire end of the run door that allows walk in entry to the coop/run.