Nolo's Plain-English Law Dictionary

Encroachment

The building of a structure entirely or partly on a neighbor's property. Encroachment may occur due to faulty surveying or by the builder's deliberate decision. Solutions range from paying the rightful property owner for the use of the property to the court-ordered removal of the structure.
NOLO-web1:DRU1.6.8.23.20160804.41205