House in Juso by ARX Portugal and Stefano Riva

Slideshow: Lisbon architects ARX Portugal and Stefano Riva have completed a top-heavy house in the village of Aldeia de Juso with a concrete upper storey settled over the glazed walls below.

Named House in Juso, the building has two storeys above ground and one below.

A rectangular concrete shell wraps around the non-rectilinear upper floor of the building to create an enclosed opening beside one of the bedrooms and two private decks.

Formed within a timber cast, this thick band of concrete has a textured surface that reveals the grains of the wooden boards that once surrounded it.

Glass walls surround the ground floor living and dining rooms, which open out onto a garden and swimming pool.

You can see a couple more projects by ARX here, both of which also feature openings in the roof.

Photography is by Fernando Guerra.

Here's a lengthier description from the architects:

House in Juso

In the concept for this small house in the vicinity of Aldeia de Juso, the tiniest area of flat land and the house’ s, as well as the high density of the new houses yet to be built in the surroundings, forcibly draw us to some sort of “obsession” about the possibilities of dilating space.

Underlying this question, the importance of “expanding” the outdoor space becomes a particular central aspect, since it is also a building integrated in a semi-rural area, where people go looking for the experience of inhabiting garden or open yard spaces.

We propose, after all, to solve and clarify the question, by widening to the maximum the inhabitable premises in their global scope, both in the vertical and horizontal referentials, in both interior and exterior.

The building has been thus structured in three floors, spatially related in profile, each level having specific and different characteristics.

In Level -1, the areas are laid out (as the regulations so demand) under the contour of the ground level.

However, this idea of “imposed limits” is to be questioned through the means of “distensions” and “advancements”, to be operated in the three possible directions (north, east and west), shaped as yards and pool.

In this floor there will also be included work and service areas.

On the ground level, the limits for the “precincts”, appears widened and defined by the walls around the lot.

The inner space is freely configured. Consistent with the strategy of maximizing the presence of the gardened outdoor space, the garage is then left aside to an “inserted” area to the south of the kitchen.

All the social spaces of the building are located on this floor.

On the upper floor resides what is the most significant expression of this project.

Until the maximum limits allowed by the regulations, was shaped a kind of enclosure of opaque lines encompassing the bedrooms and their respective yards, thus expanding the enjoyable areas and protecting their necessary intimacy.

On the roof level, an accessible terrace finally liberates the eye over a 360º view of the surrounding houses, the sea or the beautiful mountains of Sintra.