Over-and-under duplex consdierations

[Mike C.]

I'm looking into a 1925 duplex in an "over-and-under" configuration.

There are two units, each about 700 square feet, and the downstairs one is partially below ground (there are windows high up on the foundation).  The entrance to the downstairs unit is via concrete steps at the rear of the house.

Are there any special considerations I should make when evaluating this property?  Can I expect the lower unit to rent for less and be less desirable to tenants, or to attract a lower tenant quality?  Anything to watch out for in the inspection given the age or configuration?  

Thanks,

Mike