Henhouse / Chicken Coops
The inside of the chicken coop normally consists of several nesting boxes just large enough for the chickens to sit in while laying their eggs, as well as perches for the chickens to use while sleeping.
The floor of the chicken coop should be covered with material such as straw, hemcore or wood shavings. Hay should not be used as the spores and dust it creates are bad for the chucks. Bedding should be clean and dry at all times to avoid respiratory problems and damp bedding may harbour bacteria.
Sometimes the chicken coop contains feeding and watering devices for the chickens, but these may also be kept outside of the chicken coop.
Check that the henhouse is secure inside and out, and no signs of "gnawing" from rats, or possible loose boards or unsecure bolts for a hungry fox to gain entry. Think about bolts, latches and thickness of wood to make the coop as fox and vermin proof as possible. Whenever possible raise coops off the ground and try to get 18-24 inches clearance so that you can see if you have unwanted visitors beneath your hen house.
Consider durabiltiy and convenience. E.g. for cleaning out, getting in, doors not warping, letting water in.
Plenty of ventilation is required above the bird heads. Preferably across the underside of the roof. Chickens generate a lot of heat while they roost and, in summer, the internal temperature can be stifling. Ideally, cover any holes with welded mesh. A good idea is to make a large ventilation hole with a sliding cover to partially cover it in winter.