FL009 is a minimal residence located in Stockholm, Sweden, designed by Förstberg Ling. FL009 is an ongoing renovation project located in a courtyard close to Humlegården, Stockholm. The brief looked for a way to turn the small building, previously used as storage and office space, into a ground level apartment. As the property is partly protected, the changes on the outside are few: a large steel door is replaced with a pair of glazed doors, and a new dormer window adds a room to the second floor. The building spans in total 120 m2 over three floors, with a large part of the area in the basement. With only a few windows to the courtyard, our proposal seeks to make the rooms brighter and includes a light shaft down to the living room and the removal of a technical space on top of the kitchen, thus greatly expanding its volume.