I dreamed that I was building a house on someone else's roof.

Building a house is to create wealth, with a promising career and a step-by-step promotion. Pull the fixed line, indicating that the foundation is stable and the orientation and foreground have a fixed format. All right!

In someone else's old house, first, it means that someone has paved the way for you before you start; The second is to say: you sit back and enjoy success; Your prospects are higher than others.

It has nothing to do with that family. This is just a metaphor. Good luck forever!