Advice regarding Joists in Attic

[Margie Pierce]

So, I wondered if anyone had insight into finishing an attic space if my joists are 8x2 spaced 16" apart.  Now, I have heard that this only allows for "office space" rating, but my intention is to put in a full 2 bedroom unit with kitchen and bathroom with bathtub. 

Anyone have experience?

It will not be a formal unit, it will simply be an extension of the second floor unit in a duplex, so I do not need to get it permitted. 

I suspect that this is something that people often do, and typically suffer few if any negative consequences, but I wanted to see if folks had hands-on experience.