Answer:
Encroachment.
Step-by-step explanation:
Encroachment of land occurs when a person violates his neighbors property right through building a structure that extends beyond the boundary of his land and into another person's property.
However , this may be mutually agreed on by the two parties involved , and compensation given under a term called easement.
In a situation where the encroached property belongs to the government , this is referred to as structural encroachment and the government may destroy such structure without giving any compensation