In addition, the roof can be tilted. His house is tall, so it's ok to be a little shorter from his house. In this way, their buildings will serve as the backing of your home, forming a feng shui that is beneficial to your home.
As your home, if you can stay as far away from his home as possible. Don't compete with their family. Such a bad thing will go to their house.
You can plant some trees around your home to isolate it.