Who enforces the Party Wall Act?
The Party Wall Act isn’t ‘enforceable’ as such but any works that go ahead without consent risk an injunction being awarded by the Courts stopping all works. The usually substantial cost of any legal action to enforce the Party Wall process will in almost all instances be awarded against the owner carrying out the works.
Adjoining Owners can take homeowners to court over unapproved works, especially if the works cause damage to the adjoining structure/s. A local council won’t be interested if somebody informs them Owners have undertaken work without consulting relevant parties, but parties can, and often do, litigate.