The three-storey apartment, located in the neighborhood of Kolonaki in the city centre of Athens, is a private dwelling comprising the two upper floors and terrace of an apartment building, constructed in the 80s. The renovation aims to transform the existing apartment, focusing on an energy efficiency upgrade. The interior design balances the existing tonality of the dark marble floor with dark aluminum frames, metallic blinds and wooden elements. The wide spaces of the interior interplay with the openings, providing a visual openness and a connection through panoramic views of the city.