Kinda depends upon your climate and run space. My place, the grass is just starting to green up and snow is frequently measured in feet. I'm going to build heavy to hold up to the wind, roomy enough that staying inside for a few days isn't a problem and with heat sources/keeping water liquid at -40 methods. Someone in Florida is going to build in hardware cloth with 1-2 solid walls on the side of prevailing winds/afternoon sun, and possibly with lots of panels that can be opened/closed depending upon the weather each day. Are you in town, suburb, country? Can you have roosters? Will your birds be coop and run only, coop & run with supervised excursions out, tractor &pasture, coop&free range on their own recognizance? Do you want a coop you can walk into and stand up in or something in smaller height dimensions? On stilts so they can have shade under it or built to the ground?