Casa JAM: a long, narrow flat transformed by gon architects in Madrid

The Spanish practice reinvented the interior of a traditional flat by transforming the corridor into a series of fluid thresholds featuring diagonal perspectives and vibrant colour schemes.

gon architects, Casa Jam, Madrid, Spagna 2026 Foto Imagen Subliminal (Rocío R. Rivas + Miguel de Guzmán)

gon architects, Casa Jam, Madrid, Spain 2026 urban setting

gon architects, Casa Jam, Madrid, Spain 2026 plan, previous situation

gon architects, Casa Jam, Madrid, Spain 2026 project plan

gon architects, Casa Jam, Madrid, Spain 2026 section

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La redazione di Domus
17 June 2026
Madrid, Spain
gon architects
78 sqm
residential
2026

Architectural firm: gon architects
Project name: Casa JAM
Location: Madrid, Spain
Size: 78 sq m

In Madrid's Argüelles neighbourhood, gon architects have transformed an apartment with an unusual floor plan. It is 18 metres long and just 3.5 metres wide at its narrowest point. The architects' approach was to turn the corridor-style layout on its head. The original layout, characterised by a succession of enclosed rooms accessed via a dark corridor running along the partition wall, has been replaced by a continuous space traversed by a diagonal line of sight that creates the impression of greater space. Full-height sliding panels replace rigid separations between spaces, while four colour-coded areas — the blue bathroom, wood-panelled bedroom, green shower and yellow kitchen — create a sequence of thresholds rather than rooms. The project not only redefines the layout, but also challenges the very role of the corridor, transforming it from a mere passageway into a device capable of generating different relationships, perspectives and configurations.

gon architects, Casa Jam, Madrid, Spagna 2026