Tomi House is located on a 4 × 15.5 m plot within an existing residential neighborhood in Quy Nhon, Vietnam. Responding to the narrow and deep site, the project explores spatial organization, natural light, and ventilation as fundamental elements in shaping the living environment.

Designed for a young family of two parents and two children, the house is organized around a shared space for learning and play rather than a series of enclosed functional rooms. This central space acts as a hub for family activities, while transitional areas provide a balance between connection and privacy.

Two voids, positioned at the center and rear of the house, bring natural light deep into the interior while facilitating vertical natural ventilation. Combined with split-level arrangements, they create spatial and visual continuity between the different floors.

Rather than relying heavily on partition walls, the house uses changes in floor levels, transitional spaces, and voids to organize its functions. In Quy Nhon's hot and humid climate, these strategies are integrated from the outset of the architectural concept, transforming the constraints of a narrow plot into an opportunity to create a well-ventilated, connected, and family-oriented living environment.