How can I help you today? Hello, I have a question about cats. I can help you with your question about cats. Thank you. How much space is needed in an apartment for a pet cat? As long as the cat has room to roam and play. 500 square ft. should be enough. Thank you. Would the needed space increase if I had two cats? The space would not need to be increased. You might need a climbing post and extra toys. Excellent, thank you very much for your help. You are welcome. Is there anything else? That is all for now. Have a great day. You too.