As a general rule, the building owner carrying out the works pays the reasonable surveying costs under the Party Wall etc. Act 1996, and that usually includes the adjoining owner’s surveyor as well as their own. In other words, if you are the one building, you normally foot the bill for the party wall process on both sides of the boundary. The neighbour receiving the notice is not typically out of pocket for a proper, proportionate appointment.
That is the headline. The detail matters, though, because “reasonable” is the operative word and the way surveyors are appointed has a direct effect on the total. Here is how party wall surveyor fees work, who is responsible, and how to keep the cost proportionate.
The general rule: who pays
The Act is designed so that a neighbour is not left worse off because someone next door decided to build. On that principle, the building owner (the person carrying out the works) generally bears the reasonable costs of resolving the party wall matter, including the fees of the adjoining owner’s surveyor.
This is why an adjoining owner who has received a notice can usually appoint a surveyor without worrying about the invoice. The costs of drawing up the award, inspecting and recording the position are settled as part of the process, and the building owner typically pays them. The government’s guidance on party walls and building work sets out the process and who is responsible for it.
There is an important qualification. The costs must be reasonable, and the surveyors have the power to decide how costs are allocated in the award itself. If an adjoining owner behaves unreasonably, for example by causing needless delay or work, a surveyor can determine that some costs fall differently. On a straightforward domestic job, the building owner pays.
One agreed surveyor, or one each
How the fees add up depends heavily on the appointment route the two owners take. There are two options.
The agreed surveyor (one surveyor for both)
If both owners are content, they can appoint a single “agreed surveyor” who acts impartially for both sides. This is not the building owner’s surveyor wearing two hats. It is one independent surveyor whose duty is to the Act, not to either party.
This is usually the most cost-effective route because there is one set of fees rather than two, and one person coordinating the inspection and the award. For a simple, low-risk job between reasonable neighbours, the agreed surveyor route often keeps costs down without weakening anyone’s protection.
Each owner appoints their own surveyor
If the neighbour would rather have their own independent surveyor, they are entitled to appoint one. The two surveyors then work together to produce the award, and if helpful they select a third surveyor as a longstop (more on that below).
Two surveyors means two sets of fees, so this route usually costs more overall. It can be the right choice where the works are significant, the buildings are complex or high value, or the relationship between neighbours is strained and both sides want their own adviser. Prime London properties, with their period structures and shared walls, often justify separate appointments.
What makes a fee “reasonable”
There is no fixed scale in the Act. A reasonable fee reflects the actual work involved, which is why quotes vary. The main factors are:
- The scale and risk of the works. A single-storey rear extension is very different from a basement dig or an underpinning scheme.
- The type and value of the buildings. Older, structurally complex or high-value properties take longer to assess and record.
- Whether a schedule of condition is needed. Recording the neighbour’s property before works start adds time but protects both sides.
- How cooperative the parties are. Disputes, revised drawings and repeated correspondence all add hours.
Because the building owner usually pays, it is in everyone’s interest that the fee is proportionate to the job. A good surveyor will be transparent about scope from the outset. If you want to understand what the surveyors actually produce for the fee, see our guide to the contents of a party wall award.
The third surveyor
When each owner has their own surveyor, the two of them select a third surveyor at the start. This is a safeguard, not a routine cost. The third surveyor only becomes involved if the two appointed surveyors cannot agree on a point, or if an owner refers a specific matter for a decision.
In most cases the third surveyor is never called upon and does not charge. If they are needed, their reasonable fee is determined as part of the award and apportioned by the surveyors. For a well-run appointment between experienced surveyors, third surveyor involvement is the exception.
Typical London market ranges
Fees vary by firm and by job, so treat any figure as a broad guide rather than a quote. In the London market, party wall matters are often billed on the following basis:
- A simple party structure notice and award for a straightforward domestic project typically ranges from a few hundred to around a thousand pounds per surveyor, depending on the property and the works.
- Larger or more complex schemes (basements, underpinning, multiple adjoining owners) run higher because the inspection, the schedule of condition and the award all take more time.
- A schedule of condition, where required, is usually charged in addition and depends on the size of the neighbouring property.
These are market observations only. The right figure for any given job depends entirely on the specifics, which is why a proper scope and quote is always the sensible first step.
Keeping party wall costs proportionate
A few practical steps help keep fees sensible:
- Serve notice properly and early. Rushed or defective notices cause avoidable re-work. Our overview of party wall agreements explains how the process should run.
- Consider the agreed surveyor route where neighbours are on good terms and the works are modest.
- Give the surveyor accurate drawings so the award reflects the actual scheme, not a moving target.
- Keep communication open with your neighbour, which reduces friction, delay and cost on both sides.
Fee structures do not change by postcode, but building stock does: the terraces around West Hampstead raise different party wall questions than stucco villas further south, and surveyor hours follow the complexity.
How Ekron helps
Ekron acts as party wall surveyor across prime West and Central London, whether you are the building owner planning works or an adjoining owner who has just received a notice. Every instruction is led personally by a chartered surveyor, so the scope is clear and the process stays proportionate. You can read more about our party wall surveying services, and for a fee tailored to your specific project, please contact us for a quote.
Frequently asked questions
Who pays the party wall surveyor’s fees? As a general rule, the building owner carrying out the works pays the reasonable party wall surveying costs, which usually includes the adjoining owner’s surveyor as well as their own.
Does the neighbour pay for their own party wall surveyor? Not normally. Because the works are for the building owner’s benefit, the building owner typically covers the reasonable cost of the adjoining owner’s surveyor, so the neighbour is not left out of pocket for a proportionate appointment.
How much does a party wall surveyor cost in London? There is no fixed scale. A simple domestic notice and award often ranges from a few hundred to around a thousand pounds per surveyor, while basements, underpinning and complex properties cost more. Any figure is a broad market guide, not a quote.
Is it cheaper to use one agreed surveyor? Usually, yes. Appointing a single impartial agreed surveyor for both owners means one set of fees rather than two, which tends to keep costs down on straightforward jobs while still protecting both parties.
What is the third surveyor and who pays for them? The third surveyor is a safeguard selected by the two appointed surveyors, used only if they cannot agree. In most cases they are never involved. If they are, their reasonable fee is set in the award and apportioned by the surveyors.
Can the adjoining owner ever be asked to pay? Occasionally. The surveyors decide how costs are allocated in the award, and if an adjoining owner acts unreasonably or causes unnecessary work, some costs can be determined against them. On a normal job the building owner pays.
This article covers one part of the Party Wall etc. Act 1996. For the full picture, including notices, awards, timescales and disputes, read The Party Wall Act Explained: A Complete Guide for London Homeowners.
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