We took a 7x7' resin shed & built a 12x24' run around it. The roost and nesting boxes inside are stand alones so we can remove them & hose down the interior if necessary. Our 7 girls love it! The soil around the shed used to be 2 large raised bed gardens that we moved, so there are plenty of goodies they can dig for. We still let them free range when we're home though. Our old coop will be for sale after we have a chance to clean it thoroughly.
https://www.backyardchickens.com/g/i/5695790/coop-run-2013
https://www.backyardchickens.com/g/i/5695790/coop-run-2013