There are three elements that led me to developing this idea. 1.When I was young, one of my favorite picture books was about a small house, whose windows were eyes, that watched as the area around him changed from rural, to suburban, to urban, to a downtown city, at which point he is moved back to the country again. 2. I often dream of houses with endless rooms, odd settings, and unique features. 3. I recently read some issues of Justice League Dark whose headquarters is the "House of Mystery"--a magical house that can summon rooms that its occupants need.
I don't have much more on this idea. While a story could focus on a new couple who have settled in a house whose neighbors believe it is haunted, I also like the idea of it housing an older couple. In the latter story, a young person visits the home to help the couple and begins witnessing odd occurrences that lead him (or her) to take a closer look.
I suppose that this story is a type of wish-fulfillment. I would like a house like this.