The moment a party wall dispute is triggered, whether through a formal dissent or a neighbour’s silence, the question of surveyor appointment arises. Building owners are often presented with a choice they don’t fully understand: appoint a single agreed surveyor, or instruct their own surveyor while their neighbour appoints theirs separately. The decision matters, both financially and in terms of how smoothly the process runs.
The Role of the Agreed Surveyor
An agreed surveyor is a single qualified party wall surveyor appointed jointly by both the building owner and the adjoining owner to act impartially for both. This is explicitly provided for under Section 10 of the Party Wall etc. Act 1996. Crucially, the agreed surveyor does not represent either party. Their obligation is to the Act itself, to produce a fair and proportionate Party Wall Award that upholds the legitimate interests of both sides.
This is a distinction that some homeowners initially find counterintuitive. If the surveyor isn’t “on your side,” how can they protect your interests? The answer lies in the statutory nature of the role. A party wall surveyor’s obligations are codified in law. They cannot produce an Award that unreasonably restricts the building owner’s rights, nor one that fails to adequately protect the adjoining owner. The impartiality is the protection.
When Is the Agreed Surveyor Approach Appropriate?
In the majority of standard residential party wall cases, an agreed surveyor is the sensible choice. Where the works are relatively straightforward, such as a loft conversion, a rear extension with standard foundation depths, or work to an existing party wall, and where there is no significant friction between the neighbours, an agreed surveyor will typically reach the same outcome as two separate surveyors but faster and at considerably lower cost.
At ALD Surveying, we act as agreed surveyor on a significant proportion of the cases we handle. In our experience, the process runs smoothly when both parties are kept informed, when correspondence is handled promptly, and when the Award is drafted with enough precision to prevent ambiguity later.
When Separate Surveyors Make More Sense
There are circumstances where an adjoining owner may reasonably prefer their own representation. Complex excavation works, where the structural risk to the neighbouring property is significant, is one example. Cases where the relationship between neighbours is already adversarial, or where the adjoining owner doesn’t feel confident taking a joint appointment at face value, are others. Having a surveyor act solely in your interests provides reassurance in these situations, even if it comes at greater cost.
An adjoining owner is never obliged to accept the agreed surveyor arrangement. If they wish to appoint separately, they are entitled to do so, and the building owner must accommodate this. What neither party can do is appoint a surveyor who is not genuinely independent. An architect or contractor already engaged on the project cannot act as party wall surveyor.
How to Appoint an Agreed Surveyor
Both parties must actively agree to the appointment in writing for it to be valid. Typically, the building owner’s party wall notice will include a request that the adjoining owner consider agreeing on a joint surveyor. If the adjoining owner consents to the suggested surveyor, the appointment is made. If they prefer to nominate a different surveyor, the parties either reach agreement on an alternative or proceed to separate appointments.
Timeframes matter here. If an adjoining owner fails to appoint their own surveyor within ten days of being asked to do so, the building owner can appoint a second surveyor on their behalf. This is a relatively uncommon step but an important safeguard against the process stalling indefinitely.
What to Look for in an Agreed Surveyor
Experience, impartiality, and communication are the three qualities that matter most. An agreed surveyor who produces a thorough, well-drafted Award promptly, keeps both parties informed throughout, and responds to queries efficiently will deliver a smooth process regardless of the complexity of the works.
For more detail on the party wall process and to find out how ALD Surveying can support your project, visit our Party Wall Act service page.