Party Wall Tools — Notice Decision Tree & Cost Estimator

Quickly check if you likely need a notice under the Party Wall etc. Act 1996, then generate a client‑ready cost estimate.

Home / Party Wall Tools

Decision Tree — Do I need a notice?

Educational aid only — not legal advice. Rules summarised for typical cases of Sections 1, 2 & 6.

Cost Estimator

Simple High‑Risk
Currency: £ — change in code if needed.

Disclaimer: Informational only — not legal advice. For formal notices, disputes, or awards under the Party Wall etc. Act 1996, consult a qualified surveyor or solicitor.

FAQs

Party Wall Notice and Award FAQs (London)

Simple answers on notices, neighbour disputes, surveyor fees, and award timelines.Helpful use the notice checker and cost estimator with confidence.

Do I need a notice for a rear extension?

In many London rear extensions, yes. If you are digging for new foundations near your neighbour’s property, you may need a Party Wall notice. The safest move is to get a quick check from a party wall surveyor london before builders start, so you serve the correct notice and avoid delays.

If your neighbour does not reply within 14 days, the law treats it as a dissent and the surveyor process can start. After that, a 10-day request is served to appoint a surveyor, and the matter can still move forward to a party wall award even if they stay silent. If you want it handled properly with proof of service, speak to a party wall surveyor london.

If your neighbour does not reply within 14 days, the law treats it as a dissent and the surveyor process can start. After that, a 10-day request is served to appoint a surveyor, and the matter can still move forward to a party wall award even if they stay silent. If you want it handled properly with proof of service, speak to a party wall surveyor in London.

Section 6 is about excavation. If your work involves digging close to your neighbour’s building, the Act may require you to serve notice because excavations can affect their foundations. This is common for rear extensions and basements in London. A party wall surveyor london can confirm if your excavation triggers notice and what drawings you should include.

It gives a useful range, not an exact bill. Costs change based on project risk, how many neighbours are involved, drawing quality, and whether your neighbour consents or dissents. For an accurate figure, request a fixed quote from a party wall surveyor london and ask what is included in the party wall award stage.

Who pays the surveyor fees?

In many cases, the building owner (the person doing the work) pays the reasonable surveyor costs, because the work is for their benefit. The final split is normally set out in the party wall award. If you want to control costs, use a clear scope, good drawings, and appoint a party wall surveyor london early.

An agreed surveyor is one surveyor appointed to act impartially for both owners, instead of each owner appointing their own surveyor. It can be quicker and cheaper when relations are good. If your neighbour is cautious or already unhappy, two surveyors may be more realistic. Either way, the end result is usually a party wall award.

It depends on the job size and neighbour response. Simple cases can move faster when drawings are clear and access for a schedule of condition is easy. More complex work (basements, underpinning, multiple neighbours) takes longer. If you need a realistic timeline for London, speak to a party wall surveyor london and ask for a start-to-finish plan for your party wall award.

Blogs & Articles

Latest Articles on Surveying and Mapping