Haus III or the “House Without qualities” (Haus ohne Eigenschaften) is a late work by German architect Oswald Mathias Ungers which the architect built for his wife and himself. Constructed in Cologne in 1995, the house is considered an experiment on the reduction of architectural elements and it materializes the research on abstraction which Ungers had developed over the years; in this sense, the building can by seen as a conceptual model for a house which has been made real through building.
The house has a rectangular plan based on a classical architectural scheme, a central space and two side-aisles. It consists of two floors with five rooms, a central double-height volume and four equal rooms in the side-aisles.
Crucial in the design of the plan is the thickness of the exterior and the interior walls which are used to incorporate service facilities, like stairs, toilets, the elevator, bathrooms and storage spaces. The width of the walls is always the same through the whole plan.
The façades are identical by twos, symmetrical and constructed according to specific rules of proportions, no differentiation is pursued between the front and the back and the same window/door size is employed. The plan’s geometry is not made evident in the elevations in any way.
The extreme synthesis, the reduction of elements (no decoration, no hierarchy, no style) makes evident Ungers’ obsessive research for the essence of architecture, which the architect identified in the strict rules of composition.