The core activity of Frunz Bauunternehmung AG encompasses the planning and execution of construction projects in various areas, particularly:
* Building construction: Erection of buildings and structures
* Civil engineering: Execution of terrain adjustments, excavation, creation of forecourts and rainwater basins, as well as engineering civil engineering projects
* Additions and renovations: Renovation and refurbishment of existing buildings and structures
* Customer masonry/renovation: Execution of masonry work and renovations for customers
* Hazardous substance remediation: Remediation of buildings and structures contaminated with hazardous substances
* Crane work: Execution of crane work for construction projects
* Snow removal: Execution of snow removal work
* Fire compartmentalization: Execution of fire compartmentalization work
The company also offers real estate services and has its own hazardous substance remediation company.