Add on room created bedroom with no egress window

[Joshua Massari]

I am looking at buying a property in Orange County ( CA ). Home was built in 1962 and had permitted add on rooms built in 1989, but now one of the original rooms opens into the add on dining room. The original exterior egress window is still in place and just looks into the dining room, but now this is no longer an exterior egress window. There are no exterior walls that a proper egress window can be added to. If I purchase this properly and intend to rent it out, what can I do? Can an egress roof access window with a fixed emergency ladder be installed to meet the egress laws? If not then how do I go about renting out this property and not open up to additional liability? I can advertise as an office, but its likely that a tenant will plan to use it as a bedroom regardless of what I call it. Any suggestions from anyone that has run into this before? 

[Nathan Gesner]

Don't advertise it as a bedroom. What the tenant does with it is up to them. I would call it a Den or bonus room.

The square footage is all living space, which would include the bonus room.