A zigzag forms the junction between warm-coloured carpet and grey tiling in this Barcelona home, which has been overhauled by local studio Arquitectura-G, and also features vaulted ceilings.

Located in Barcelona's Ensanche district, the long and thin 149-square-metre flat extends through from the street to an interior courtyard on the other side of the building.
Tasked with opening up the deep interiors to plenty of natural light, Arquitectura-G removed a long corridor that distributed spaces, as well a series of dividing walls.

To break up the open-plan interiors, the studio adopted a similar approach to its renovation of another Barcelona apartment.
Changing levels and flooring denote different spaces, while the white-painted walls, warm-coloured carpeting and vaulted ceiling beams create continuity between areas. This type of vaulted ceiling ? known locally as a Catalan arch ? is a common feature in old Barcelona properties.

"The decision that was taken was to remove the partition walls and the corridor distribution as much as possible, so that a chained sequence of spaces with different usages could be generated," the architects explained.
"The limit between these uses is determined by changes in the pavement level and in the false ceilings or apertures in the load-bearing walls," they continued.

An open-plan lounge and dining area occupy one end of the flat, where two large windows face onto the courtyard.
The floor is cove...