A modular concrete grid on a narrow riverside lot — three bays wide, two deep, stacked to three levels. The grid is the house; there is nothing else.
The structural grid is a 4.2m × 4.2m bay module, expressed as raw concrete columns and beams on every face. Infill is either glass (living) or board-formed panels (services/sleeping). The plan is radical in its repetition: every room is the same size, defined by the grid, not by function. You decide what a room is by how you furnish it.