I just posted an ad on CL.
There are quite a few ads on here for people selling chicken coops. Some are wonderful and I'd like to have them for my own birds. Others; not so much. To those who are new to chickens, I'd like to offer up some basic chicken-keeping math and information.
Chickens need at least 4 square feet of space, PER BIRD, in the coop. So if you have a 4' x 4' chicken house/coop, you can comfortably house 4 standard sized chickens. The coop also needs to have adequate light and ventilation. This does not mean they should have drafts blowing on them, but clean, fresh air coming in through a vent, even in winter ( In exceedingly cold weather, you can always cover them with plastic).
Chickens need at least 10 square feet of space, per bird, in the run/pen/ outside space. If you give them less space in the house or run, you will run the risk of stressing them, which can lead to feather picking, fighting, and cannibalism. Best case scenario, they won't lay as well for you.
Backyardchickens.com is a friendly website community with lots of helpful information, and I recommend it highly. It is completely free, and chances are, if you have a question, someone will help you find the answer. I'm not being paid to post this, just concerned about seeing ads for housing that is totally inadequate for the number of birds advertised. Chicken keeping should be comfortable and humane for both the keeper AND the chicken, even if your birds eventually end up on your table. Thanks for reading. : )