Easement laws by state vary, and you leave out alot of important information. Number one, you need to get your deed (see the Register of Deeds for your county). Two - you need to see what your neighbors deed has (Again Register of Deeds will charge you a small fee). You can then compare them and see what it says. Otherwise if it isn't in your deeds then the statures vary greatly from state to state, but if ten years is the required time period to gain a prescriptive easement - then you may be out of luck. However there are some things that you (and an attorney you hire - hint hint) might consider: Find out from an attorney how they may have changed the scope of the driveway by deciding to build a house, what the statutory limit is for adverse possession or prescriptive easement, etc... Good luck.