The core activity of HGA GmbH is the provision of services in the areas of property management, gardening, environmental maintenance, facility management and cleaning, particularly in the regions of Basel-Stadt, Riehen and parts of Northwestern Switzerland. The specific activities include: property management, gardening, environmental maintenance, facility management, building and facility cleaning, plant maintenance, garage cleaning and winter services. The company offers these services to ensure the maintenance and upkeep of buildings and facilities and to provide customers with a comprehensive service offering.