Yes. To establish adverse possession in Washington State you need to show that you had possession of the property such that it was open, notorious, hostile and adverse for 10 years, and that your possession of the property was not without the permission of the true owner. If the neighbor has not used your property for access for 10 years and there is no recorded easement of record, he has no right to use your property.
Answered on Mar 25th, 2014 at 2:11 PM