What are walls constructed on the line between two properties known as?

Walls constructed on the line between two properties are known as party walls. These structures typically serve as a shared boundary between two adjoining properties, and they can be used for various purposes, including supporting the weight of buildings on either side.

Party walls hold special legal significance, as they are often subject to specific agreements between the property owners regarding maintenance, modifications, and usages. Understanding the function and regulations associated with party walls is crucial for fire safety and building codes, as they can influence fire spread and overall structural integrity in case of a fire event.

Exterior walls are those that form the outermost layer of a structure and do not necessarily share a boundary with another property. Load-bearing walls support weight from above and are integral to the building's stability, while nonbearing walls primarily serve to divide spaces within a structure without contributing to its structural support.