Hi we're new here! We just started building our coop 3 days ago. And today we got a bit stumped. A bit of background info: We have a 50ft x 90ft back yard. We can only have 4 hens. The plan is to build a 4x4 coop plus 2 nesting boxes sticking out the side of it, with a 4x8 run that we can move around the yard so the chickens can eat fresh grass and bugs. This thing is going to be extremely heavy to move, we're still working on the how part. During the very cold and windy winters we want to keep the coop under the deck to protect it a little from the weather. The space under the deck is about 64". Right now we have the floor and legs done (and floor insulated). The legs are 20" long and can be cut down a bit if need be. What we need help to figure out is how tall do the walls need to be for the chickens to have enough room to roost (and how high do the roosts need to be anyways)? I'll be the only one cleaning this and don't mind having to bend over to do it, i'm short too. The shortest I'd want the legs to be is maybe 12" so the chickens can use the space under the coop. They'll be standard breeds, not bantams. My husband and I are grateful for any help! Edited: Changed some of the plans after reading people's suggestions. Thanks for the help! Keep checking in for updates.