Hello how may I help you? Hello. I have a question about cats. Hi, how may I help you? Hello. I have a question about cats. What is your question about cats? How much space is required in an apartment for a cat? One cat would need about 300 square feet of space. Would the space required increase if I had two cats? Yes. Each cat would need about 300 square feet of space. Thank you. Do outdoor cats require more space? When outside cats can have a territory of 5,000 square feet. Thank you for your help.