After using the coop for a while I love it. The girls are happy and it suits our needs very well. There are only a few updates I would add...
• The Majic brand white barn paint has not held up well. The white parts will all have to be repainted this summer.
• I made a clear vinyl insert which covers the rear vent which I install in the winter to avoid drafts but remove in the spring/summer/fall to improve air flow.
• The rear door which is framed out with wood, is prone to getting shavings from the floor stuck in the bottom corner making the door hard to open. I plan to redo this over the summer so the door will be less prone to getting stuff stuck in it.
• We rarely close the pop door anymore. When I started I was religious about going out there and closing the coop each night and opening it each morning. As time has gone on, we've yet to have a serious predator attack inside the coop (a hawk got one of the SLW's while they were freeranging but that is a different story). Everyone's situation is different so I'm not advocating that others should not close their pop doors each night but none of the people around me who keep chickens in wire enclosures report losing any birds. The guy up the road freeranges 100+ chickens and lest them sleep in his cattle trailer and I think he loses enough of them because they have no protection that it keeps all the neighborhood foxes and coons happy.
• If I had it to do over again, I probably wouldn't bother doing so much framing. I treated it as if the entire structure was going to be dealing with heavy loads like a house full of furniture and people but the hens, bedding, feeder, waterer, and even snow loads just are not that heavy. I don't think it hurts to be framed this way but it isn't necessary and I probably could have saved at least a few dollars by reducing the amount of lumber.
My final advice to anyone who is considering building a coop vs. buying one would be- Go for it! I am lucky to own a lot of tools and be pretty handy but nothing that I did couldn't have been done with a hand saw and a hammer if one were patient enough. My coop is far from perfect but the hens are happy and I haven't bought eggs from the store in a long time now. Just look at the coops here, find a style you like, and make one that is similar. Not only is building your own a little cheaper, it is a lot more satisfying to see something you made with your own hands.