Party Wall Act
The Party Wall Act exists to protect the concerns of neighbouring landowners and to facilitate an agreements between them with regards to construction works. It will most likely be necessary to issue a Party Wall Notice, as required by the Act, if a basement is being constructed or extended. The diagrams below show the summary of criteria for serving Party Wall Notice.
New Structure less than 6m away and lower than a line drawn downwards at 45o from the bottom of the neighbour's foundation.
Excavation and construction of foundations and basement walls within 3m of an adjacent building or structure owned by others.