we built this backyard chicken coop our of an old dog house and a scrap sheet of roofing tin and some hardware cloth. The nest box is too deep and is heavy should have made it out of a piece of 1/2 or 5/8 plywood instead but it lets us collect the eggs from outside the coop without having to go inside. It has a thin concrete floor not for structural reasons but to keep varmits from digging in. It will also allow us to clean it out good and save the fertilizer.
Thanks for looking and enjoy