Schlösselgasse 1/3 Show info Hide Schlösselgasse - 3D visualization. Schlösselgasse - 3D visualization. Schlösselgasse - 3D visualization. Project Description Renovation and rooftop extension in Vienna’s 8th district. General Info Period 2022 – 2023 Location Vienna, Austria Usable area 300 m² Scope of work Concept Design, Approval Planning, Permission Category Residential