I think I have finally decided on the coop plans. I will follow the plans for the playhouse coop but add 12 inches on to the length of the coop making it 3x4. I'm going to add an outside nestbox, extend the wood to the bottom on the coopside for corner protection and use a wall mounted feeder and water container to save run space. Is a 24 square foot run adequate for 4 hens that free range part of the day? My urban yard space is limited. Thanks for your help