To have large, impressive house in the dream, means your big abilities, talents and skills. To see a mansion, when you are dreaming, has meaning of your latent qualities or abilities that may be developed and lead to future success or usefulness. Mansion is a symbol of potential growth. You may feel that your current position is in routine and you want to change this. Sometimes mansion represents a relationship, which is going to be changed.
Read more about dreaming of Mansion in other dream meanings interpretations.