Die Hugo Steiner AG in St. Gallen ist ein Unternehmen der Intercity Group. The Intercity Group is an independent real estate company representative in Zurich, Lucerne, Basle, St. Gallen and Olten. IT Immobilien Treuhand AG in Basel. Hugo Steiner AG in St. Gallen. Wüst und Wüst for exclusive residential properties in Zurich und Lucerne (an exclusive affiliate of Christie's Great Estates). SPG Intercity specialising in commercial properties in Zurich, Basle and Geneva (an alliance partner of Cushman & Wakefield) Inova Intercity as property advisors in Zurich, Uster and Basle. alaCasa.ch for residential properties.