What Does a Party Wall Surveyor Actually Do?
In short
A party wall surveyor administers the Party Wall etc. Act 1996 when building work affects a shared wall or neighbouring foundations. They record the condition of neighbouring property, agree a party wall award setting out how the work will be done, and resolve any dispute about damage. They must act impartially.
A party wall surveyor is the professional who manages the legal process when your building work affects a neighbour. If you are converting a loft, extending to the boundary or digging foundations near next door, there is a good chance you will need one. Understanding their role helps you appoint the right person early and keep your project on programme.
What a party wall surveyor does
- Advises whether the Act applies to your plans and which neighbours must be notified.
- Prepares and serves notices on your behalf, with the drawings and details the Act requires.
- Prepares a schedule of condition, a photographic and written record of the neighbour’s property before work starts. This protects both sides if a claim is made later.
- Agrees the party wall award, the legal document setting out the work, working hours, access, protection measures and how any damage will be put right.
- Reviews the structural details where work affects the party wall, such as steel bearings and foundations.
- Inspects at the end and settles any damage claims under the award.
One surveyor or two?
If the neighbour dissents to the notice, there are two options:
- Agreed surveyor: one surveyor acts for both owners. Usually quicker and cheaper.
- Two surveyors: each owner appoints their own, and the two agree the award between them. If they cannot agree, a third surveyor they selected at the start decides.
Whoever appoints them, a party wall surveyor has a statutory duty to act impartially. Their job is to resolve the dispute fairly under the Act, not to fight for one side.
Who pays
The building owner normally pays the reasonable fees of both surveyors, because the work is being done for their benefit. That is worth including in your budget alongside design and approval costs.
When to appoint one
As soon as the design is settled enough to show what will be done to the shared wall or near the boundary. Notice periods are one or two months under the Act, and an award can take longer if there are questions, so early appointment protects your start date. See our guide to the party wall agreement process for the full sequence.
How we handle party wall matters on London’s Prestige projects
We flag party wall work at the start, recommend experienced surveyors who understand London housing, and provide the drawings and structural details they need. Notice periods and award timings are built into your programme, and on site our team works strictly to the award with neighbouring property protected throughout. Our Highbury Terrace Mews loft and extension is typical of the shared wall work we manage. Read about our loft conversion service, or book a site visit and we will tell you whether your project needs notice.
Common questions
Can my neighbour choose their own party wall surveyor?
Yes. If they dissent, they can agree to share your surveyor or appoint their own. The building owner normally pays the reasonable fees of both.
Is a party wall surveyor on my side?
Not in the usual sense. Under the Act, every party wall surveyor must act impartially, whoever appointed them, and resolve matters fairly between both owners.
Do I need a party wall surveyor if my neighbour consents?
Not necessarily. If the neighbour consents in writing, no award is required, although a schedule of condition is still a sensible protection for both sides.