Is it against code to have a room in your basement 3ft lower?

Question

My idea is to have a theatre room in my basement that is lower than what the regular slab of concrete is. i want to be able to walk down into the theatre room. Has this ever been done before.

Answer 1

By code the ceiling has to be 7 foot tall to be classified as "living space" but you can do what you want

Answer 2

There is no code restricting that. You want to make sure ground water won't be an issue though.