1 Garage for a Duplex. Who gets it?

[Alan Mills]

Working on finishing up rehab on a duplex. The electrical for the garage is tied in to the lower level rental. I can easily advertise that whoever is in the lower unit gets the garage (and with it the obligation for playing the electrical for the garage), but what happens if they don’t want the garage, and the upper unit tenant does want the garage?

Is it common to charge extra rent for an oversized two car garage?

Added bonus question:

There is also an extra storage shed on the property. Who gets that? Charge extra rent per month? $10?

Not trying to pinch pennies, just wondering what others have done in similar situations. Thanks!