If you dream spooky house, it can mean you had a memory of such a house and this old memory was replayed in your dream.
If your dream of old spooky house was one from your childhood, it can be explained. A small child is relatively dwarfed in size in a big house and he / she would feel the house is spooky.
Another possible dream interpretation could be that the house represents a building with rooms to explore. Translated in real life, you have many doors and windows to discover opportunities for you to try.