Drive through on neighbor's property

[Cole Puterbaugh]

Looking at a duplex in a metro area. Apparently, the drive-through is partly on the neighbor's property and it "needs to be extended." (These are 2 separate issues). The houses are all shotgun style houses - so they have narrow lots with enough room on one side of the house for a 1-car width drive through, while the other side of the house has 3-4 ft of space before touching the neighbor's drive-through.

The property disclosure form indicated that the owner knows about both issues. 

Who do I contact about the issue? City zoning?

Also call the neighbor and see if he really cares?