Party Fence Wall
Under the Party Wall etc. Act 1996, a 'party fence wall' is a wall that stands astride the boundary between two properties and is used to separate their gardens or land, but forms no part of either building. Garden walls, close-boarded fences on the boundary, and dividing walls between plots can be party fence walls. Work involving or near a party fence wall (such as extension excavations within 3–6 m) may require a party wall notice.