The Haunted House Next Door

The neighbors are building a huge haunted mansion next door, surrounded by a tall two-feet wide cement wall, and a lot of trees with little ovalish pasty whitish grey barely green leaves that look like a color that has no life in them. Every time I see the color of the leaves, they are even more pasty white and grey than I remember.

The mansion is blocking what used to be a clear view of (non-pasty white and grey) trees and blue sky. My mom says that they always wanted to be next to us so that some luck might rub off on them. The family history includes selling fake medicine. Also that once they bought the land, and then once they started building, not-so-good things started happening. How does one neutralize a haunted mansion next-door feng shui?