Thank you everyone for your help, your threads really helped me design my coop. I have a small space for a coop, rectangle 89 inches x 40 inches. I want 4 chickens, but am making a coop with just enough space for 5 (20sq feet, nesting boxes outside of coop, drop door in floor, food and water outside). I will need to use the space under my coop as part of my run area but I need to keep the height of the whole coop + run stack to 6.5 feet. Coop will be 4.5 feet tall and run under the coop will be 2 feet. There will be additional run area extending beyond the coop. 2 feet tall under the coop feels tight, will the chicken use that space? Or will they use it as a dungeon for the unpopular girls? I do not have space for a 50 sq ft enclosed run if I don't use the space under the coop. (they will be able to play in the backyard many days.) The extended run will only be 2.5 feet high, this is a front yard coop and I have to "hide" it. My front yard is gated with a wall and an open fence on top, but it is also elevated from the sidewalk, so a giant run would tower over people walking by on the side walk. I need to keep it low so I can hide it with some star jasmine plantings! I live in SoCal, so the run will never be covered and the area receives perfect dappled shade during the summer and sun in winter.