Definition & Meaning of "party wall"

What is a "party wall"?

A party wall is a shared wall that separates two adjoining properties, often found in buildings like townhouses, duplexes, or condominiums. This wall is typically built on the property line and is jointly owned by both property owners. Party walls serve as a barrier for sound and fire, providing privacy and safety for both sides. They may also support the structure above, making them an important element in building design. Any modifications or repairs to a party wall usually require agreement between both property owners to ensure safety and maintain the integrity of the shared structure.