Which term describes a habitable room designed for a single family, including necessary facilities for living?

The term that accurately describes a habitable room designed for a single family, including necessary facilities for living, is "Dwelling Unit." This term refers specifically to a space that serves as a residence and contains the essential amenities one would expect in a home, such as cooking and bathing facilities, sleeping areas, and living spaces.

A dwelling unit is typically more than just a room; it is a self-contained living space that provides for the needs of its occupants. This can include single-family homes, townhouses, and individual apartments, all of which contribute to the concept of a dwelling unit as a space meant for living.

In contrast, other terms like "Apartment Unit" refer specifically to units within a larger building and may not encompass the variety of housing types included in the definition of a dwelling unit. A "Household Unit" generally refers to the people living together rather than the physical space itself, while "Family Suite" is more of a descriptive term that does not capture the broader definition needed for this question.