We used an existing shed so there wasn't much we could do but it has worked out really well.
The walk-in door faces west. The popdoor faces east. There are windows on the north & south walls. There is a vent near the roof on the east wall.
Since the run is on the east side, it's shaded by the coop from the hot, afternoon sun in the summer. There are also trees and the run roof. Most of our weather comes from the west/northwest so that south window can stay at least partially open year around. There is also a barn about 25' (north) from the coop which helps protect from the cold, winter wind & snow. In the winter we attach a clear tarp on the first 8' of the run on the north side which helps keep the run dry and warmer.