Which term refers to a single unit providing complete, independent living facilities for individuals or groups?

The term that describes a single unit providing complete, independent living facilities for individuals or groups is "Dwelling Unit." A dwelling unit is defined as a space that includes a kitchen, bathroom, and other facilities necessary for living. This concept is crucial in codes and regulations surrounding housing and construction as it ensures that the living space is designed to meet the needs of occupants.

In contrast, while an apartment may also refer to a living space, it typically implies a renting situation within a larger building context that may not encompass the full definition of a unit designed for independent living. A unit could be a more generic term lacking the specifics of independence and complete facilities. Likewise, a residence tends to refer more broadly to any living space without addressing the independence or facilities that a dwelling unit implies. Thus, "Dwelling Unit" encompasses the complete idea of self-sufficient living quarters as stated in building codes and similar regulations.