The core activity of Hartmann & Sohn AG primarily encompasses civil engineering and construction work, including: Civil engineering: excavation work, cable trenches, road construction, terrain improvements, cable plowing, stream and slope stabilization, block stone walls, water intakes, environmental work, renaturation of high moors, bike and hiking trail construction. Construction: masonry work, concrete work, exposed concrete formwork, natural stone floors, rubble stone walls, plastering work, renovation work, demolition work. Granite processing: sale of Calanca gneiss and Serizzo-Antigorio plates, custom cutting, production of window sills, wall cladding, chimney hoods, stair treads, table tops, benches, facade bases and house entrances. Planning: new buildings, renovations, residential buildings, barns, developments, Maiensäss renovations, agricultural terrain improvements. The company thus offers a wide range of services in the construction sector, from planning to execution of construction projects.