I have set three ground rules for this list:
a. The horror is either supernatural or its precise nature is left open to interpretation – nothing clearly caused by people and their madness alone. This rules out works like A Rose for Emily, Northanger Abbey, Jane Eyre, Rebecca, Great Expectations, and The Yellow Wallpaper.
b. The story has to take place in an actual house; no Castle of Otranto or The Shining.
c. The house is the main setting of the story and/or the horror in question is tied to the house in some way.
Jane Eyre (2011).
If you were an unmarried young woman in the Victorian age and you didn’t have a fortune of your own, working as a governess would be one of the few ways you could earn your living. They would be hired by a wealthy family to live in a house that wasn’t theirs and look after other people’s children, with no leisure time and few possessions to call their own. It was hard and often thankless work – and many of these women found themselves wishing for a way out, for something more.
[Cue Belle singing about the "great wide somewhere."]