question regarding landlocked property

[Katy Nguyen]

Hi everyone.  I'm looking at a vacant parcel, and it's zoned residential.  There are streets nearby; however, in one direction, there are other vacant lots in between this parcel and the street.  In another direction, there is one lot in between this parcel and the street.  Who can I contact to find out if there will be road access from this parcel?  Would an easement be required?  Would the title company have this info, or do I need to contact the County's Planning Department?  What happens in the case when there is no road access and the lot is completely landlocked?  Thanks.