The core activity of E. Koller Zimmerei AG encompasses the planning, manufacturing, and assembly of timber constructions, particularly in the areas of carpentry, joinery, and interior finishing. This includes, among others: carpentry work (floor, wall, and roof constructions), element construction (manufacturing of building components as elements), extensions and roof extensions, renovation and refurbishment of buildings, interior finishing (kitchens, doors, cabinets, locking systems, thermal insulation), joinery work (staircase construction, terraces, partition walls), and planning and consulting services for construction projects. The company thus offers a comprehensive range of services in the field of timber construction and interior finishing.