Cat House Size. Add one to two inches. WIDTH Measure the widest part of your cat the chest or hips.
Cats do tend to like cramped conditions but also want to. A small-sized house wont even be comfortable for the cat. Cat doors should be 6 inches high.
Essentially you want it to be big enough for your cat to comfortably turn 360-degrees as well as lying down and stretching out when they like.
Back door should be flush with cat house floor. The easiest way to build an outdoor cat house is to use a plastic storage tub with a lid like those sold at the hardware store. Front door is flush with the 1x3 on its side. Cats Felis catus often referring to as domestic or house cats are small carnivorous mammals that are typically domesticated as pets by humans.