Hello how may I help you? I have a pet question Sure, what is your question? How much space do you need for a pet cat A pet cat needs approximately 200 square feet in an apartment or house. Ok. How much space do you need for two cats? Two cats would need approximately 400 square feet. Great. Does a cat need a window? They on't need one, but they'd certainly enjoy it. don't* Perfect. thank you. You're welcome!