I did the math and it should be fine. I looked at the sheds but just the shed was more than I paid for the coop.
https://chickencoophq.com/products/overez-xl-chicken-coop-kit-up-to-20-chickens
This has probably been discussed many times but I have a question concerning heating of my coop. I live in middle Georgia so it doesn't get super cold much but it does get cold enough to do harm to chickens. I have a new coop that just arrived for my girls and boys and I am going to wire it up...