A multigenerational house is characterized by the fact that several generations of a family live together under one roof, but each has its own self-contained apartment. Most often, the property is a two-family home designed so that two generations can live together, yet privately. Whether some living areas are developed for common use or the living units are completely separated from each other can be decided individually.
Nowadays, a multi-generation house can be built both as a solid house and as a prefabricated house. The advantages of a prefabricated house are the relatively fast completion as well as the mostly cheaper and better calculable construction method. Even if the quality of prefabricated houses does not reach the quality of a solid construction, it has improved significantly in recent years. However, the resale value of a multi-generation prefabricated house is always lower than that of a solid house.
If you live together in two generations, you share the construction and repair costs as well as the costs for the property. The social and communal idea behind a multigenerational house also has many advantages. For example, parents can look after the grandchildren and be looked after or cared for by family members in their old age. Regardless of the emotional value, this form of living also saves on costs for a nursing home or childcare.
Source: Building guide Germany