The carriage house is a potent symbol of the novel’s hidden realities and the powerful, unresolved past that dictates the characters’ present. Initially presented as Meredith’s off-limits writing studio, its forbidden nature represents the boundary between the characters’ perceived reality and the meta-fictional engine driving their lives. It is the physical heart of the narrative’s central mystery, a decaying structure that holds both Meredith’s personal history and the authored script of Katie and Tyler’s summer. Its state of disrepair mirrors the emotional decay of its inhabitants, particularly Meredith, whose grief and isolation are contained within its walls. The house is a space where fiction is literally constructed, blurring the lines between authorial intent and the characters’ lived experiences, making it the ultimate source of the story’s secrets.

The carriage house’s meaning shifts depending on which character is interacting with it. For Katie, it is a marker of Meredith’s eccentricity, a curious but distant part of her world. For Tyler, however, it becomes the destination of his investigation into Meredith’s true nature, culminating in a climactic discovery. When he finally confronts Meredith, his urgent questioning—“‘What’s upstairs?’ I said. ‘What am I going to find, Meredith, when I get upstairs?’” (360)—highlights its symbolic role as the keeper of the story’s ultimate truth. His intrusion into this space is not just a physical trespass but a violation of the narrative itself, forcing an unwilling author to reveal her methods. The carriage house thus becomes the battleground where free will and predestination collide, forcing the characters to confront the artifice of their own love story.