Still, that means 60% are open to sharing a house with specters and spooks -- but not without a concession or two. Five other states require such a disclosure, but only if the seller or the agent is asked directly. Known locally as the “Ghostbusters Ruling,” the state Supreme Court ruled in 1991 that if a house is haunted, information about paranormal activities must be provided in all future listings. “The case sets legal precedent in the state, requiring disclosure of hauntings if the home was declared haunted publicly,” Ortegren said. For what it’s worth, 1 in 4 respondents said they have lived in a haunted house, and only a third of them knew it was haunted before moving in.