Paying Duplex Utilities

[Geren Knight III]

I am looking at my first duplex that was converted into a SFH. I plan to convert it back to a duplex; however, all of the utilities are set up for a SFH now. Should I have the utility companies add another line or should I pay the utilities for the tenants? Also, if I pay the utilities, do I add that charge to the rent? How is this typically handled?