Casa Tobogan | Z4Z4 AAA

Casa Tobogan

A family with many stories of travel wanted a house that would help them tell these stories. The wanted to live in a garden, and for their house to “embody the cinematic diversity of domestic life.” In response, Z4Z4 architects designed a house in 3 levels, a house that at one glance is difficult to comprehend but has achieved all the desired characteristics nonetheless. The architect has defined the composition as a juxtaposition of two different houses on the same plot with a void in between. The first is underground, and the other above the surface of the earth.

© Imagen Subliminal

The house underground is a composition of two volumes surrounded by concrete walls with a courtyard in the centre. They are connected by a corridor surrounding this courtyard. The architect explains, “In the South there is a garden for “the Good Life”, to the North lurks the “Grotesque Garden” — in the middle is the promising double height greenhouse. Over this green sequence along the plot, a smooth surface, based at ground level, lets Nature cross over the slab and the car to pass through from one side to the other over the dining-kitchen area.”
The void gives way to the car park, an entrance and two staircases, working as a thermal regulator and constructing a tracking shot between a garden, a folie and a picturesque grotto while crossing through the lounge, sauna-fitness center, bar, dining room and kitchen.

© Imagen Subliminal

“The scenic load of this space is achieved through the exposure of domestic life circulating between floors,” says the architect. The level above is a complete contrast, a composition of three cylindrical volumes wrapped in a thin corrugated iron sheet that seems as if it is a weightless curtain. Inside are 9 bedrooms that hold their souvenirs.

© Imagen Subliminal

“One of the houses is organized to inhabit the soil with its habits and routines. The other was made light-heartedly, emancipating from the ground, in the air, flying at a double height over the garden. Both are totally different from each other in materiality, shape and weight. The most important spatial interest of the complex is the heterogeneous, ambiguous and membranous space that appears between the two houses.”

© Imagen Subliminal

While the first impression of this structure is unfriendly and cold, it surprises by being the complete opposite. The void reveals life inside the house, comfortable and full of light. It reveals a cinematic diversity of domestic life just as the clients desired.

Project Info:

Architects: Z4Z4 AAA
Location: Madrid, spain
Area: 512 m²
Year: 2015
Project Management Architects: Rafael Beneytez, Víctor Cano, Ophelia Mantz
Photographs: Imagen Subliminal
Project Team: Rafael Beneytez,Víctor Cano, Ophelia Mantz,Borja Iglesias, Elena Oña.
Structure: Juan Carlos Arroyo, Ignacio García (Calter) + Rafael Beneytez, Víctor Cano (z4z4)
Modular System: Guillermo Martínez, Luis Martín (Eurobox) + Rafael Beneytez, Víctor Cano (z4z4)
Landscape: Martín Toimil (Land30)
Light Design: Ilumisa + Rafael Beneytez, Víctor Cano (z4z4)
Facilities: Carolo Garrote (Proyecta!)
Bioclimatic Project: Ophelia Mantz, Elena Oña
Contractor: Mario Navarro, Santiago Ibañez (Ars Tectónica)
Surveyor: Alfonso del Castillo
Project Author: Rafael Beneytez Duran (Z4Z4)
Sahiba Gulati
Sahiba Gulati

Sahiba Gulati is a former assistant editor at Arch2O and current Assistant Professor at the Balwant Sheth School of Architecture in Mumbai. Her academic and editorial work is deeply rooted in researching gender and public space, exploring how built environments shape—and are shaped by—social identities and power dynamics. With experience in both publishing and academia, Sahiba brings a critical, nuanced perspective to Arch2O’s discourse on inclusive urban design, spatial equity, and the role of architecture in public life .

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