I recently posted about my coop design but my spouse isn't cooperating in the build so my next option is to purchase. Luckily I live near a man who makes them. He's got one for sale right now which seems about the right size for the flock size I'm looking at. It's got four nesting boxes and a roost (I want poop boards so that will be reconfigured. And since we live in Louisiana where ventilation is a concern. I will eventually be building a screen door for the access door too which will stay open during the summer months. Will also be creating a good sized run. This coop is $450. I think it's big enough for about eight chickens. I wish I had measured it while I was looking at it. I'll call it about 3x4 feet not including nesting boxes.