Hello how may I help you? I just adopted a new cat. How much space does a cat need in my apartment? A cat needs approximately 300 square feet of space. Okay. I have 1000 square feet so I am good. Do I need a large litter box? You do not need a large litter box unless you own more than one cat. May I suggest purchasing a play house for your cat? Okay. What type of play house? One that a cat can climb onto and sleep in. How much space do I need for that? Only about 50 square feet. Okay. Thank you. You're welcome!