Renting unpermitted units

[Daniel Berthiaume]

I'm currently in escrow on a property in Ohio. It is a fully rented duplex with an attic conversion that is also being rented out. It has it's own gas meter but it shares electical. 

What kind of risk am I exposing myself to as a landlord? I've heard stories in CA of leases not holding any weight if it is for an unpermitted unit.

Has anybody had any experience with this situation and do you have any advice?