The home as trap
Domestic noir inverts the home's fundamental symbolic meaning: instead of the refuge from a dangerous world, the home becomes the most dangerous location in the protagonist's life. Writing this inversion requires understanding what makes the home feel safe in the first place — the familiarity, the intimacy, the shared history, the practical dependencies — and then showing how each of those qualities can become a mechanism of entrapment. The domestic details that establish the setting's normality at the beginning of the novel acquire sinister resonance as the novel progresses: the locked room, the deleted messages, the unexplained absence. The home should be rendered with enough specificity that the reader can feel its weight.