The core activity of Kohler Bau AG is the execution of construction projects and related services. Specifically, this includes: Building construction (construction of buildings), Civil engineering (construction of infrastructure such as roads, bridges, tunnels, etc.), Renovations and refurbishments (renovation and modernization of existing buildings), High-altitude construction (specialized construction work in mountainous regions), Protective structures (construction of protective structures such as avalanche control systems, wildlife protection systems, etc.), Snow removal and transportation (services related to snow removal and transportation of materials), Water construction and restoration work (construction and renovation of water structures such as dams, canals, etc. and restoration of water bodies), Environmental work (services related to the design and maintenance of environments such as parks, gardens, etc.), and Spring capture (construction and renovation of spring capture and water supply systems).