What is the term for a wall that separates two dwelling units?

The term for a wall that separates two dwelling units is referred to as a common wall. This type of wall is typically shared between two living spaces, such as in a duplex or a row of townhouses, providing both structural support and privacy for the occupants of each unit. Common walls serve as the dividing barrier that defines the individual living spaces while also allowing them to benefit from shared structural elements.

In architectural contexts, effective design considerations are essential, and common walls can play a significant role in acoustic insulation, fire safety regulations, and energy efficiency. Understanding the concept of a common wall is crucial for architects and planners as they design multi-family housing structures, ensuring that residents have the necessary separation without compromising on the overall integrity and functionality of the building as a whole.

Other terms like partition wall or division wall might refer to interior non-load bearing walls within a single dwelling unit or space but do not apply to the specific context of separating two distinct living areas. A boundary wall is more relevant to outdoor spaces and property lines rather than the separation of living units.