No, there is no automatic boundary adjustment. And there is no automatic 6-foot buffer or anything like that, that is created in this situation.
Normally you would have to “adversely possess” the adjoining 6 feet (or whatever amount of land it would be) to become owner of it. But that requires possession of the property, which it does not sound like you have.
Douglas N. Kiger, Attorney at Law
Blado Kiger Bolan, Tacoma, Wash.