On the outskirts of Sintra in Portugal, the Barcelona studio Arquitectura-G hollows a centuries-old quinta de recreio to its bare perimeter walls, then inserts a structure of blue-pigmented concrete that claims the interior as its own chromatic territory.
The project is the third in a sequence of interventions the studio is developing on a former agricultural estate five kilometres north of Lisbon — a property of the typology known as quintas de recreio, the grand recreational villas that once animated the Sintra foothills before the countryside emptied in favour of the city. This particular building had served as a wine cellar alongside workers' quarters: a pragmatic, segmented volume divided by multiple staircases and shaped by the rhythms of agricultural production. Abandoned for decades, it forms part of a larger ambition to restore the entire estate under the principles of permaculture, reimagining it as a self-sufficient territory of orchards, vineyards, livestock, and renewed built structures.
Planning regulations protecting the quinta's surroundings mandated preservation of the existing envelope — and so Arquitectura-G adopted the strategy of refined abstraction that runs through much of their work: treating constraint as productive ground. Once the building was stripped to its perimeter walls alone, a new structural body of blue-pigmented concrete was embedded within, rising from the basement cellar through a helical staircase and extending upward to form the floor slabs of the upper levels.
The staircase is the spatial event around which everything organises. Viewed from the ground floor, it spirals upward through a cylindrical void to a skylight that pours zenithal light into the interior — a shaft of sky pulled down through the blue. The concrete here is not neutral but immersively chromatic: saturating ceilings, floors, and structural surfaces in a continuous hue that shifts from the pale luminosity of the upper rooms to a deep, submarine darkness in the basement, where the curved walls of the former wine cellar feel almost geological. The decision to pigment the entire concrete pour rather than apply a surface treatment gives the colour a solidity that ordinary paint could not produce; the building feels as though it was cast from a single tinted mineral.
On the ground floor, kitchen, dining room, and living area unfold in an open-plan field centred on the staircase void. The upper level is arranged as a secondary living room bathed in zenithal light, with bedrooms flanking either side — a plan with the quiet clarity of a cloister more than a farmhouse. The exterior walls remain rendered in pale stucco, preserving the quinta's historic silhouette against the landscape. The tension between this white shell and the electric blue interior is where the project's authority resides: the building reveals nothing of itself from the outside, holding everything within.
For Arquitectura-G, materiality is a field of research rather than a palette of preferences — and in this house they arrive at a conclusion both spatial and chromatic: that an abandoned building's deepest potential lies not in nostalgia for its original program, but in what colour and light can accomplish within the discipline of its walls.
