Record what is happening
Photograph the relevant work where you can do so lawfully and note dates, locations and what you understand the work to involve.
Ask the building owner
A calm written enquiry can establish whether notices were overlooked, whether the work differs from what you thought, or whether the owner says the Act does not apply.
Do not assume surveyors automatically have jurisdiction
Where no statutory process has been invoked, the route available may be different from a normal section 10 dispute.
Act quickly if serious harm is threatened
Where works create an immediate risk of damage or irreversible interference with rights, obtain appropriate professional or legal advice promptly.
Key takeaway
The first task is to establish the facts and the correct legal route, not to manufacture a Party Wall process that may not exist.
This page provides general information about the Party Wall etc. Act 1996 and common practice. It is not legal advice and does not replace advice on the facts of a particular matter.