House JCM is a minimalist residential renovation located in the Alps, Switzerland, designed by Ralph Germann. The challenge of converting a nineteenth-century agricultural structure into a habitable dwelling without erasing its history is one the Swiss Alps present with particular clarity. Cantonal authorities here require that renovations within agricultural zones preserve the qualitative identity of existing buildings – a constraint that sounds restrictive but, in the hands of Ralph Germann architectes SA, becomes a precise design brief. The result is a 96-square-meter residence that feels both ancient and entirely considered, where the hierarchy of the original barn remains the organizing principle of the interior.
The building’s agrarian logic is still readable at every scale. The steep roof pitch, designed to shed alpine snowfall quickly, was dismantled, insulated, waterproofed, and rebuilt using the original clay tiles from 1913 – the same tiles, reset in the same pattern, but now enclosing a thermally efficient envelope. The deep eaves that protected the timber façade from seasonal weather remain in place, performing the same function. The triangular ventilation openings that once regulated hay temperature throughout the summer have been glazed and retained as apertures, their agricultural purpose absorbed into a domestic rhythm of light and air.
The central gesture of the renovation is the insertion of a glass and timber box within the barn’s raw volume – a contemporary object placed inside a historical container rather than replacing it. This approach, reminiscent of the interventions championed by Swiss architects working within the country’s robust tradition of adaptive reuse, preserves the spatial experience of inhabiting a nineteenth-century barn: high void, exposed structure, and the particular quality of light that filters through agricultural openings. The box accommodates the living spaces while the surrounding volume remains largely untouched, giving residents direct perceptual access to the original construction.
