Wallenstam's property Stampen 5:6, located next door to Gothenburg Central Station, the Garden Society of Gothenburg (Trädgårdsföreningen) and Gothenburg's new event district, has gained both a new look and increased energy efficiency through a comprehensive reconstruction and extension. With a champagne-colored façade, new windows, a high-gloss black Dekton surface and a glazed 1.5-floor extension, the property is positioned in the area as an ultra-modern premium office building. On March 1, Convendum will open its second Gothenburg unit in the top three floors of the property.

Apart from an external transformation, major changes have also been made internally involving new entrances, foyers and elevators. In total, the property has been expanded by 2,000 square meters.