The core activity of T-House GmbH encompasses three main areas:
1. **Facility Management**: The company offers services in the field of building cleaning, janitorial services, residential cleaning, and industrial cleaning. This also includes specialized services such as construction cleaning, gardening, and green space maintenance.
2. **Building Technology**: T-House plans, installs, and maintains heating, ventilation, sanitation, and air conditioning systems. The company also handles troubleshooting in these areas.
3. **Real Estate**: The company offers services in the field of real estate development, management, administration, sales, and renovation. This also includes project management and property administration.