Some things I keep thinking about when it comes to gothic fiction, after spending too much time in houses that don't want me there:
The house is never just a house. In almost every gothic fiction trope worth talking about, the building is a character. It has moods. It has memory. Ann Radcliffe understood this in 1794 when she wrote The Mysteries of Udolpho, and every gothic novelist since has basically been renting rooms in the structure she built.
Gothic fiction readers don't want to be scared the way horror readers do. They want to be unsettled. There's a difference. Scared is a jolt. Unsettled is a feeling that follows you out of the book and sits in the corner of the room while you're trying to fall asleep.
The "explained supernatural" is one of the most underrated gothic fiction tropes. Radcliffe invented it. Every ghost in her novels turns out to have a rational explanation. But here's the thing: by the time you get to the explanation, you've already spent two hundred pages afraid. The explanation doesn't undo the dread. It just gives your rational mind something to hold onto while your body is still in the dark hallway.
Toni Morrison's Beloved might be the most important gothic novel written in the last fifty years. 124 Bluestone Road is haunted, literally and otherwise, and Morrison proved something the genre had been circling for centuries: that gothic fiction is one of the best ways we have to write about historical trauma. The house remembers what the characters try to forget.
Pregnant women keep showing up in gothic fiction and I'm not entirely sure the genre has reckoned with why.
Laura Purcell's The Silent Companions does something I think about a lot. The threat isn't a ghost or a monster. It's painted wooden figures that might be moving when nobody's looking. That's a gothic fiction trope taken to its logical extreme: the inanimate object that refuses to stay inanimate, the domestic space that won't behave the way domestic spaces should.
Most gothic fiction tropes are really about confinement. A woman trapped in a castle, a family trapped in a house, a mind trapped in a body that won't stop remembering. The walls don't have to be literal. They just have to feel like they're closing in.
There's a version of gothic fiction that's essentially a weather report. Fog, rain, mist, cold. And it works. The atmosphere does half the storytelling before a single character speaks a word.