My coop is 8x12, the run is 10x20. I used the beams from the upstairs deck as frames for the walls. The windows I found in the old shed. My house is an old farmhouse, and the back of the house is an old woodroom leading to the outside. I built the coop onto the woodroom, so it is attached to the house and I can go straight from the kitchen to the woodroom to the coop. I don't have to go outside in Adirondack weather to tend the chickens! And I can store feed and shavings and things right in the woodroom. What do you think?