Hi,
I am an architect and I do this type of work constantly. I'm guessing that turning an unused basement into a used one, will be worth it in the long run.
How long have you owned the house for? How long are you planning to keep it? How much equity do you have? How much do you think a basement would rent for?
Those are very hard questions (and fairly easy to answer) that I ask my clients before embarking on a design/construction project of your type.
Give me a call and we can discuss further.
Cheers,
ileana schinder
www.ileanaschinder.com
ile@ileanaschinder.com
202.431.6760