After 14 days
For party structure and excavation notices, a dispute is treated as having arisen if you have not given written consent within 14 days. That is the law's way of making sure the work is regulated by surveyors even if you say nothing.
After a further request
Your neighbour can then write asking you to appoint a surveyor. If you do nothing for 10 days, they can appoint a surveyor to act on your behalf.
That surveyor must act impartially and properly, but they will not be someone you chose, and you will not have discussed your concerns with them.
For a new boundary wall
Where the notice concerns a new boundary wall, not agreeing within 14 days simply means the wall goes wholly on your neighbour's side. The work can still go ahead.
Why replying is better
- You choose who looks after your interests
- You can raise concerns about cracks, damp or access early
- You make sure the condition of your home is recorded before work starts
- It usually costs you nothing
If you have already missed the deadline
Do not panic. Contact your neighbour, or the surveyor named in their correspondence, as soon as you can. If no surveyor has yet been appointed for you, you may still be able to appoint your own.
Where this comes from in the Act
- Section 1: New building on line of junction
- Section 5: Disputes arising under sections 3 and 4
- Section 6: Adjacent excavation and construction
- Section 10: Resolution of disputes
Links go to the official text of the Party Wall etc. Act 1996 on legislation.gov.uk.