Hello how may I help you? I am getting a new cat and I need to know how much space in my apartment I need Hello! I can help you with that. What is the age of your new cat? It is only a kitten....six months old Your new kitten will need at least 500 square feet to grow and play. As they get older do I need to increase that space? No. Your cat will need at least 500 square feet to be happy and to exercise. Thank you for the information You are welcome. Is there anything else I can help you with? No thanks Okay! Have a great day. You too!