Party wall problems? Here are several tips: You must tell your neighbours if you want to carry out any building work near or on your shared property boundary, or ‘party wall’, in England and Wales. Party walls stand on the land of 2 or more owners and either: form part of a building, don’t form part of a building, such as a garden wall (not wooden fences). Walls on one owner’s land used by other owners (2 or more) to separate their buildings are also party walls. Party structures: You can also have a ‘party structure’. This could be a …