Few months back my coop went up in flames and now I live in area that is not chicken friendly. Love your coop and if I get some new property, I will build something very much like this.
I hate to be critical, but...make sure you paint or waterproof the main house of the coop. The groves in your ply-wood are made to go up and down and I see you have them side to side. Rain will run down those groves, but in this case, they might seep in and make the wood age much quicker. As long as there is a solid coat of out-door paint or waterproofer you should be fine.
Like I said, I love the coop, but as a builder of sorts, I would hate to see water take advantage of your awesome coop