A house can be understood as an intermediary between the exterior and interior. A shell enclosing a living space with the ability to regulate how its inhabitants interact with the outside world. When designed with a site-specific approach, architecture purposely opens and closes to its environment to allow the desired living experience. To answer the search for a serene family retreat, Casa Dosmurs is conceived as an isolating mechanism capable of ignoring its immediate perimetral surroundings while opening to sea views and a contemplative green patio connected transversely in a single open space: a radical way of understanding the house as a space for constant connection between the people inhabiting it.

The project is located in Alella, one of the coastal towns next to Barcelona The neighborhood spans along the mountain’s hillside with an eclectic mix of architectural styles, which causes a sense of discord around the site. Because of the steep slope and the closeness between houses, the only open view from the site is towards the sea. On the lower ground of the plot, native trees have grown spontaneously and frame the mountainous countryside, which unfolds in a continuation of rolling hills.

Being a single-family house surrounded by neighbours, the house is set apart from the street and adjacent constructions by hiding between two bare walls that follow the site’s abrupt slope. Thus, the house disappears entirely from the street’s view. The program is divided into two staggered levels down the hill, preventing the building from standing out over the street. Two entrances are connected through a staircase along the west wall, while on the opposite front, limited openings control visuals of neighbouring houses. In a radically different attitude, the two other facades open entirely to the outdoors.

A wide ceiling-to-floor window in the south-facing facade frames views of the local landscape from the double-height living area and the upper floor. The roof and walls of this facade protrude two meters beyond the limit of the interior space, acting as a passive climate element that shelters the interior from direct sunshine throughout the day in summer. In winter, while openings at both ends of the north-south axis allow cross ventilation, concrete facades absorb heat from incident sunlight during the daytime to release it when the temperature drops. On the upper level, the two bedrooms connect to a secluded garden facing the mountain. On the opposite side of the rooms, modular wooden partitions can be totally or partially closed, offering different degrees of privacy and regulating air currents. Above this story, the house’s flat roof acts as a large open terrace.

Casa Dosmurs explores the charm of combining generous living spaces with austere materiality and an efficient constructive resolution to create a house where different everyday life activities can happen with intimacy while maintaining an open relationship with the landscape.