Holzrausch designs Frankfurt penthouse as a roof garden in the middle of the city

Munich-based architecture firm Holzrausch has completed a two-storey extension to a penthouse in Frankfurt, featuring open-plan living spaces that connect with a roof terrace overlooking the city.

Robert Volhard, the founder of the architecture and design platform Stylepark, had lived in the building with his wife Patricia for 18 years before moving up a level when the building's roof required urgent replacement.

Holzrausch has completed a two-storey extension to a penthouse in Frankfurt...