Local practice Bruzkus Greenberg has redesigned a penthouse apartment in Berlin , adding a blue-stained wooden core that contains key functions including the entrance and built-in banquette.

Bruzkus Greenberg aimed to make the 75-square-metre apartment, located in the Prenzlauer Berg neighbourhood, more practical and cohesive for its owners.

The "blue box" contains key functions including the apartment's entrance and built-in banquette

The existing cellular layout was organised around an unused fireplace and comprised several rooms, one without any natural light, that were cut off from one another.

Bruzkus Greenberg founders Ester Bruzkus and Peter Greenberg removed the fireplace and all of the internal walls to create an open-plan arrangement with circulation organised around a distinctive inner core.

Ester Bruzkus and Peter Greenberg renovated the space to feature an open-plan arrangement

The bespoke timber element combines wall panelling, storage and a built-in banquette.…