Although Sottsass is...
the designer of numerous interiors exhibitions and of course of many products in and outside his original education (Ceramics)I do not know any buildings that he has designed and that were actually build.
Acme Studios
Acme Studios in Hawaii commissioned Sotsass to design one of their pens. It is also said that he designed their house - one of only three of his buildings in the USA. Try googling them.
