A house in dreams typically represents yourself and your psyche. Different rooms represent different aspects of your life. The bedroom relates to intimacy, the kitchen to nourishment, the attic to memories, and the basement to the unconscious and hidden fears.
The house is a universal symbol of the self. The temple, the church, all are houses of the soul. Your dream house is your spiritual home.
In Jungian psychology, the house represents the self. Upper floors are consciousness, the basement is the unconscious. Unfamiliar rooms suggest unexplored aspects.