Agreed Party Wall Surveyor London
Need one impartial surveyor for both neighbours? Hourican Associates act as Agreed Party Wall Surveyors in London under Section 10(1)(a) of the Party Wall etc. Act 1996. We help Building Owners and Adjoining Owners keep the process clear, neutral and cost-effective by preparing valid notices, detailed Schedules of Condition and legally robust Party Wall Awards.
What Is an Agreed Party Wall Surveyor?
An Agreed Surveyor is a single Party Wall Surveyor jointly appointed by both the Building Owner and the Adjoining Owner when a dispute has arisen under the Party Wall etc. Act 1996. Instead of each owner appointing a separate surveyor, both neighbours agree to use one impartial professional to administer the Act and settle the matter by making a Party Wall Award.
This does not mean the surveyor acts as a mediator, negotiator or personal adviser for one side. The Agreed Surveyor’s duty is to apply the Act fairly, decide what is reasonable and ensure the Award protects both properties while allowing lawful notifiable works to proceed.
The Agreed Surveyor route is often chosen for straightforward London residential projects such as loft conversions, rear extensions, chimney breast removals, structural openings, boundary walls and smaller excavation works.
Agreed Surveyor Meaning Under Section 10(1)(a)
Section 10 of the Party Wall etc. Act 1996 sets out the dispute resolution procedure. Where a neighbour dissents to a valid Party Wall Notice, or does not reply within the statutory period, a dispute is deemed to have arisen. The owners may then either:
- Concur in appointing one surveyor — known as the Agreed Surveyor; or
- Each appoint their own surveyor — the Building Owner’s Surveyor and the Adjoining Owner’s Surveyor, who then select a Third Surveyor.
The Agreed Surveyor must be appointed in writing. Once properly appointed under Section 10, a Party Wall Surveyor’s appointment cannot usually be cancelled simply because one owner changes their mind. For this reason, both owners should understand the role before agreeing to the appointment.
You cannot act as your own Party Wall Surveyor. The surveyor must be independent of the parties to the matter and must have sufficient knowledge of the Act, construction, access requirements, risk, damage procedures and Award drafting.
What Does an Agreed Surveyor Do?
The Agreed Surveyor manages the Party Wall process after a dispute has arisen. Their task is to produce a fair, workable and enforceable framework for the notifiable works.
- Reviews drawings, structural information, engineer’s details and the proposed construction method.
- Checks whether the correct Party Wall Notices have been served, including Section 1, Section 2 or Section 6 notices where relevant.
- Reviews the adjoining property risks, including shared walls, party structures, boundary walls, foundations, chimney breasts, roof spaces and basement or excavation proximity.
- Carries out a detailed Schedule of Condition Survey before works start, usually including written notes and photographs.
- Prepares and serves the Party Wall Award, commonly called a Party Wall Agreement.
- Sets out the permitted works, working hours, access arrangements, protective measures, making-good obligations and procedures if damage is alleged.
- Deals with reasonable queries from both owners and, where necessary, prepares supplementary awards or addenda for agreed changes to the works.
The purpose is not to stop lawful works. It is to ensure the works are properly authorised under the Act and that the Adjoining Owner’s property is reasonably protected.
How Our Agreed Surveyor Process Works
We keep the process clear for both neighbours so that everyone understands what has been agreed, what has been awarded and what happens if a problem arises during the works.
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Initial review of your project
We review the proposed works, drawings, structural details and property arrangement to confirm whether the Party Wall Act applies. This includes checking whether the works involve a party structure, excavation close to neighbouring foundations, a new boundary wall, a loft conversion, chimney works or basement works. -
Notice and response check
We confirm whether valid Party Wall Notices have been served and whether the Adjoining Owner has consented, dissented, requested an Agreed Surveyor or failed to respond. Where notices have not yet been served, we can prepare and serve them correctly. -
Written appointment as Agreed Surveyor
Both owners must agree in writing to the appointment. We explain the impartial role clearly so that the Building Owner and Adjoining Owner understand that we are not acting as either party’s advocate. -
Schedule of Condition inspection
We inspect the relevant parts of the adjoining property before the notifiable works start. This provides a clear written and photographic record that can help avoid later disagreement about whether damage is new or pre-existing. -
Drafting the Party Wall Award
We prepare the Award setting out the scope of works, method, timing, access provisions, safeguards, making-good obligations, damage procedure and fee responsibility. The Award is drafted to be practical for contractors and clear for both owners. -
Service of the Award
The final Award is served on both owners. Unless it is appealed within the statutory period, it becomes the document that regulates the notifiable works under the Act. -
Construction-phase support
If issues arise during the works, we can review concerns, inspect where appropriate and determine whether further action, clarification or a supplementary Award is required.
When Is an Agreed Surveyor a Good Option?
The Agreed Surveyor route works best where both neighbours want a professional, efficient and non-adversarial process. It is particularly suitable where the works are relatively straightforward and both owners are comfortable relying on one impartial surveyor.
- Loft conversions: steel beam bearings, party wall raising, flashing details and works to shared roof structures.
- Rear or side extensions: excavation near neighbouring foundations, new walls near boundaries and access for construction.
- Chimney breast removals: structural support, shared stack considerations and protection of adjoining finishes.
- Boundary wall works: new walls at or near the line of junction, garden walls and party fence wall issues.
- Neighbourly projects: where both owners want to avoid unnecessary duplication of surveyor time and cost.
When Is an Agreed Surveyor Not Suitable?
An Agreed Surveyor is not always the best route. The appointment depends on confidence, transparency and the ability of both owners to accept one neutral professional decision-maker.
- There is already a serious neighbour dispute: if trust has broken down, separate surveyors may be more appropriate.
- The works are unusually complex: deep basement excavations, underpinning, temporary works or multi-property schemes may require more detailed independent scrutiny.
- There are multiple adjoining owners: flats, freeholders, leaseholders and commercial neighbours can make the appointment structure more complicated.
- One owner wants private strategic advice: an Agreed Surveyor cannot advise one party against the other.
- A surveyor has already acted extensively for one side: separate appointments may be needed to preserve confidence in impartiality.
Where the Agreed Surveyor route is not suitable, Hourican Associates can advise on alternative appointments, including acting as the Building Owner’s Surveyor or the Adjoining Owner’s Surveyor.
Pros and Cons of Using an Agreed Party Wall Surveyor
For many London homeowners, appointing one Agreed Surveyor is the simplest route. However, it is important to understand both the benefits and the limitations before choosing this option.
Advantages
- Usually more cost-effective than two separate surveyor appointments.
- Can be faster because there is one professional preparing the Award.
- Less adversarial and often better for neighbour relations.
- One clear point of contact for both owners.
- Good for straightforward residential works.
Potential Drawbacks
- Not suitable if either owner does not trust the process.
- The surveyor cannot provide private tactical advice to either side.
- May be less appropriate for complex basements or high-risk structural works.
- The appointment cannot usually be withdrawn once properly made.
- If one party expects an advocate, separate surveyors may be better.
Agreed Surveyor Fees in London
Agreed Surveyor fees vary depending on the size and complexity of the works, the number of adjoining owners, the quality of drawings provided, whether notices have already been served, the level of inspection required and whether the Award needs further amendments during the works.
Transparent Party Wall Fees
Hourican Associates provide clear fee guidance before appointment. As a guide:
- Party Wall Notice service: from £150 + VAT per adjoining owner.
- Schedule of Condition Surveys: typically £385–£585 + VAT, depending on the works and size of property.
- Full Party Wall Award service: typically £1,100–£1,500 + VAT for serving notice, carrying out the survey and agreeing the Award.
Fees depend on project size, property layout, complexity and risk. Basement surveys are priced separately because they often require a more detailed whole-property inspection and closer review of excavation works.
In many cases, the Building Owner pays the reasonable costs of preparing the Award where the works are solely for their benefit. The Award may address fee responsibility and, where appropriate, apportion costs in accordance with the Act.
How We Protect Neutrality
Neutrality is the reason the Agreed Surveyor route works. Both neighbours must be confident that the surveyor is not simply “on the side” of the person paying the invoice.
- Clear written appointment: both owners confirm the agreed appointment in writing.
- Equal communication: important information is shared transparently with both owners.
- No private advocacy: we do not advise one owner on how to gain an advantage over the other.
- Evidence-led decisions: drawings, site conditions, photographs, access needs and statutory rights inform the Award.
- Practical safeguards: the Award records how the works should be carried out and what happens if damage is alleged.
If we consider that an agreed appointment would not be appropriate, we will say so. A fair appointment structure at the start is far better than a disputed process later.
Agreed Surveyor vs Separate Party Wall Surveyors
The right route depends on the works, the neighbour relationship and the level of risk. The table below summarises the practical difference.
| Issue | Agreed Surveyor | Separate Surveyors |
|---|---|---|
| Number of surveyors | One impartial surveyor appointed by both owners | Each owner appoints their own surveyor |
| Typical cost | Often lower overall because there is one surveyor | Usually higher because two surveyors are involved |
| Speed | Often faster on straightforward works | Can take longer because surveyors must agree terms |
| Best for | Neighbourly, straightforward residential works | Complex works, poor relations or higher-risk projects |
| Neutrality | One surveyor must act impartially for the Act | Both appointed surveyors must also act impartially, despite being selected by each owner |
| Private advice | Limited, because the surveyor cannot advise one side against the other | Each owner has their own appointed surveyor to explain their position |
Why Choose Hourican Associates as Your Agreed Surveyor?
Hourican Associates are specialist Party Wall Surveyors in London. We are regularly appointed on residential and commercial matters where both owners want the process handled professionally, fairly and without unnecessary complication.
- Chartered Building Consultancy specialising in Party Wall matters across London.
- RICS-regulated practice with qualified professional experience across CIOB, MCABE, FPWS and the Pyramus & Thisbe Club.
- Experienced in loft conversions, rear extensions, excavations, basement works, chimney removals and boundary wall issues.
- Clear fee guidance before appointment, with practical explanations for both neighbours.
- Strong local experience across West London, North London, South London and East London.
London Projects Where an Agreed Surveyor Can Help
London homes often sit close together, share structural walls or have sensitive neighbouring properties. An agreed appointment can be particularly helpful where both owners want certainty without escalating the matter unnecessarily.
- Victorian and Edwardian terraces in areas such as Fulham, Hammersmith, Wandsworth and Richmond upon Thames.
- Mansion blocks, flats and period conversions in Kensington, Chelsea, Westminster and Camden.
- Extensions, roof works and structural alterations in Chiswick, Islington, Haringey and surrounding boroughs.
Agreed Party Wall Surveyor FAQs
An Agreed Party Wall Surveyor is one impartial surveyor appointed by both the Building Owner and Adjoining Owner under Section 10(1)(a) of the Party Wall etc. Act 1996. They prepare and serve the Party Wall Award after a dispute has arisen and must act fairly under the Act.
Yes. The Agreed Surveyor does not act for the Building Owner or the Adjoining Owner as a personal representative. Their role is to apply the Party Wall Act impartially, assess the works, record the adjoining property condition and make a fair Award.
Fees depend on the property, works and number of adjoining owners. As a guide, Hourican Associates offer Party Wall Notice services from £150 + VAT per adjoining owner, Schedule of Condition Surveys typically from £385–£585 + VAT, and full Party Wall Award services typically from £1,100–£1,500 + VAT for standard residential matters. Basement works are priced separately.
In most cases, the Building Owner carrying out the works pays the reasonable surveyor’s fees where the works are solely for their benefit. There can be exceptions, especially where repair costs are apportioned or where an owner makes additional requests that cause unnecessary extra time.
It is often more cost-effective because there is one surveyor rather than two. However, the cheapest route is not always the most appropriate route. If the works are complex or relations are strained, separate surveyors may provide a more suitable appointment structure.
No. Payment does not change the surveyor’s duty. Even where the Building Owner pays the reasonable fees, the Agreed Surveyor must act impartially and make decisions based on the Party Wall Act, the evidence and the reasonable protection of both properties.
Once a surveyor has been properly appointed in writing under Section 10, the appointment cannot usually be rescinded by either party. This is why both owners should be comfortable with the agreed appointment before signing.
Sometimes, but basement works require careful consideration. Excavations, underpinning, temporary works, neighbouring foundations and whole-property condition records can make the matter more complex. We will advise whether an Agreed Surveyor appointment is appropriate or whether separate surveyors would be better.
Either owner may appeal a Party Wall Award to the County Court within 14 days of service. Appeals should not be made lightly and may require legal advice. In many cases, the better approach is to raise practical concerns before the Award is finalised.