Beh Dad House is designed around three functional zones -- entrance, public, and private -- arranged across five levels. The entrance zone contains a workroom, an entry hall, a central courtyard (atrium), and a pool room. A transitional layer between the entrance and public zones accommodates the guest bathroom. The public zone comprises the kitchen, dining area, and living room, while a mezzanine between the public and private zones houses the television room. At the uppermost level, the private zone is formed by a private hallway, the parents' bedroom, and two children's rooms, one of which occupies a lower half-level with greater independence, situated beside a terrace overlooking the street.
The central question was the disparity between the small plot area and the large built area required by the client. Building upward offered a solution, yet vertical expansion risked fragmenting the house's spatial unity. Moreover, the plot's position on the northern side of the urban grid, combined with its narrow width, made a skylight essential. The concept that emerged from this set of constraints was a hollow centre: a rooftop skylight that both extends the functional levels of the building toward one another and, paradoxically, separates them.
The vertical staircase was likewise employed to simultaneously connect and differentiate the spaces, creating continuity between the building's levels while layering the spaces functionally, so that each level defines its role in relation to its neighbours. The section enables the intermediate spaces in the middle layers to detach from the public spaces, allowing greater coherence within the public zones. In this way, the hollow centre serves as an agent of both spatial expansion and spatial separation in response to the constraints of the site relative to the required floor area.
Thanks to the roof-level lighting, a gradient of light forms within the section of the house. By deploying wooden shutters on the exterior windows, one can darken the house, and the quality of light -- the contrast between the darkness of the perimeter walls and the brightness at the centre -- becomes manifest.