Party Wall Surveyor Costs: What to Expect
Do You Always Need a Party Wall Surveyor?
No. A party wall surveyor is only legally required if your neighbour dissents to your party wall notice, or fails to respond within the 14-day response period (which is treated in law as dissent).
If your neighbour consents to the works in writing, you can proceed without appointing a surveyor at all. Many straightforward projects — extensions, loft conversions, rear additions — are completed successfully this way every year. Our Party Wall is built for exactly this situation, helping you generate compliant notice and consent documents without the cost of a surveyor.
If your neighbour does dissent, however, appointing surveyors is a legal requirement under the Party Wall etc. Act 1996.
How Much Does a Party Wall Surveyor Cost?
Surveyor costs vary depending on where you live, the complexity of the works, and how many surveyors are involved.
Hourly rates
Party wall surveyors typically charge between £90 and £450 per hour, with London surveyors generally at the higher end of that range.
Total cost of a Party Wall Award
The Party Wall Award is the formal document surveyors produce to authorise the works. Typical costs are:
| Scenario | Approximate cost |
|---|---|
| Single agreed surveyor — loft conversion | £900–£1,200 |
| Single agreed surveyor — extension | £1,200–£1,500 |
| Single agreed surveyor — basement | £1,800–£2,700 |
| Two surveyors — loft conversion | £1,800–£2,400 |
| Two surveyors — extension | £2,400–£3,000 |
| Two surveyors — basement | £3,600–£5,400 |
These are approximate figures. Costs can be higher if the works are complex, if there are multiple adjoining owners, or if the surveyors cannot agree and a third must be appointed.
London vs the rest of the UK
Surveyor fees tend to be significantly higher in London and the South East. Outside London, you are more likely to be at the lower end of the ranges above.
Agreed Surveyor vs Two Surveyors
When a dispute arises, you and your neighbour have two options.
Agreed surveyor
Both parties agree to appoint a single surveyor who acts impartially for both sides. This is usually the quicker and cheaper route, as only one set of fees is incurred.
Two surveyors
Each party appoints their own surveyor. The two surveyors then work together to produce the Party Wall Award. If they cannot agree, they appoint a third surveyor to make a final decision.
This arrangement roughly doubles the cost, since both surveyors charge for their time — and the building owner is typically responsible for paying both sets of fees.
Who Pays?
In most cases, the building owner — the person carrying out the works — pays all surveyor fees, including the fees of any surveyor appointed by the adjoining owner.
There are some exceptions: if the works address a defect that benefits both parties, costs may be shared. If the adjoining owner requests additional works at the same time that benefit them, they will be responsible for those costs.
How to Avoid Surveyor Costs
The most reliable way to avoid surveyor fees is to get your neighbour's written consent before any dispute arises.
This means:
- Talking to your neighbour informally before serving notice, so they understand what you plan to do and when
- Serving a clear, complete party wall notice well in advance
- Making it easy for them to respond in writing
If your neighbour is happy with the works and signs the consent letter, the party wall process is complete — no surveyor required. Our Party Wall generates the notice and consent documents you need for this outcome, at a fraction of the cost of professional surveyor involvement.
What Does a Surveyor Actually Do?
If a dispute arises, a party wall surveyor:
- Reviews the proposed works and any concerns raised by the adjoining owner
- Carries out a schedule of condition of the adjoining property before works begin (to record its existing state)
- Produces a Party Wall Award — a legally binding document authorising the works and setting out conditions
- Can be called on to resolve any disputes that arise during or after the works
The Award is binding on both parties, though either side can appeal to a county court within 14 days of receiving it.