What Does a Party Wall Surveyor Actually Do?

A party wall surveyor is not "your" surveyor in the traditional sense — under Section 10 of the Party Wall etc. Act 1996 they act as a statutory referee, appointed to resolve any dispute between two neighbours over notifiable works. Their duty is to the Act, not to whichever owner appointed them.

The three appointments

Under the Act you can be:

• The Agreed Surveyor, jointly appointed by both owners — one neutral person, cheapest route.
• The Building Owner's Surveyor, appointed by the person doing the works.
• The Adjoining Owner's Surveyor, appointed by the neighbour receiving the notice.

In the two-surveyor scenario, both surveyors together also select a Third Surveyor — a tiebreaker who's only called on if the two disagree (rare in practice).

What the surveyor actually does — step by step

1. Reviews the drawings and scope. Confirms which sections of the Act are engaged (Section 1, 2, 6, or a combination) and whether the notice is validly drafted.

2. Inspects both properties. Walks the shared wall, foundations, boundary line and any features at risk. Takes measurements.

3. Prepares a Schedule of Condition. A dated photographic record of the adjoining owner's property before works start — walls, ceilings, floors, external elevations, driveways. This is the single most important document if damage is alleged later.

4. Drafts the Party Wall Award. The legal document that authorises the works to proceed. It sets out: what work is permitted, the hours it can be done, protective measures required, insurance obligations, and the process for dealing with any damage.

5. Serves the Award on both owners. Once served, the building owner can start work lawfully. Either owner can appeal within 14 days on a point of law — very rare.

6. Deals with damage claims during and after works. If cracks appear in the adjoining owner's property, the surveyors compare against the Schedule of Condition and either dismiss the claim (pre-existing) or agree remedial works and cost.

7. Closes the matter. Once works are complete and any damage settled, the file closes.

What a party wall surveyor does NOT do

• Give planning advice. That's a planning consultant.
• Design your extension. That's an architect or structural engineer.
• Inspect for building regulations compliance. That's Building Control.
• Value the property. That's a valuation surveyor.
• Take sides. Even the "Building Owner's Surveyor" cannot advocate — they must act impartially under Section 10.

How long the process takes

Straightforward projects: 4–8 weeks from notice served to Award served (most of that is the statutory notice period, not surveyor time). Complex or multi-owner projects: 8–12 weeks.

Do you need one?

You need to serve notice if your works are notifiable. You only need a surveyor if the neighbour dissents or doesn't respond within 14 days. See [do I need a party wall surveyor](/blog/do-i-need-a-party-wall-surveyor) for the full breakdown, or run our free 60-second checker.

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