Balth is a minimal home located in Cologne, Germany, designed by Demo Working Group. This overlooked space, with its angular constraints and forgotten corners, contained the seeds of transformation. What emerged from this intervention is a masterful exercise in volumetric thinking—a two-storey family dwelling that both respects and reimagines its mid-century container.

The design hinges on a crucial initial move: the removal of the existing roof to raise the ridge line, aligning it with surrounding buildings. This seemingly simple act of urban harmonization delivers functional dividends, creating sufficient height for a complete additional level within the permitted building envelope. The result is a spatial gift—120 square meters of living space carved from what was essentially urban void.

What distinguishes this project is its structural logic. Rather than imposing an arbitrary new order, the designers derived a three-dimensional grid from the building’s existing framework, allowing them to choreograph a sequence of rooms that feel both inevitable and surprising. This approach recalls Robin Evans’ exploration of the “projective cast” where architectural form emerges from the shadow of invisible ordering systems.

The spatial organization demonstrates careful consideration of light and function. A generous living area stretches along the north-facing façade, extending dramatically to the roof—a move that transforms potentially harsh northern light into a diffuse ambient glow ideal for gathering spaces. The central two-storey volume works as both service core and sleeping quarters, its pragmatic stacking reflecting a Japanese-influenced efficiency of means.

The monochromatic color palette serves a dual purpose. On one level, it enhances the abstract sculptural quality of the interlocking volumes, allowing shadow and light to articulate the space rather than surface decoration. Simultaneously, this restraint creates a contemplative backdrop for family life, where personal objects and furnishings can take center stage without visual competition.