By Nauman Zafar | Party Wall Consultant | Survey of Party Wall · Last Updated: June 2026

Content reviewed against Pyramus & Thisbe Club best practice guidelines and the Party Wall etc. Act 1996.

Party Wall Basics

What is a party wall survey?

A party wall survey records the condition of shared walls, floors, or foundations before building work begins. It is the benchmark that protects both owners against false damage claims and keeps the works legally compliant. Think of it as a health check for the parts of your home you share with a neighbour. See our schedule of condition reports for what the record contains.

Who needs a party wall surveyor in London?

Anyone planning structural works on a terraced or semi-detached property, such as a loft conversion, extension, basement, or chimney removal, is likely to need a party wall surveyor. London's dense housing means most works touch a party wall or a neighbour's foundations. If you are unsure, our guide on who needs a party wall surveyor walks through it.

Is a party wall survey legally required?

When your works fall under the Party Wall etc. Act 1996, serving notice is a statutory obligation, not a choice. If your neighbour dissents, you must appoint a surveyor and obtain an award before starting. Skipping this can lead to an injunction stopping your project and significant legal costs. The full process is set out in our guide to the Party Wall Act 1996.

Can I carry out a party wall survey myself?

No. The Act requires the surveyor to be impartial and not a party to the works, so you cannot act for your own project. In practice, only experienced party wall professionals are accepted by neighbours and the courts. Doing it yourself risks invalidating the whole process and leaves you exposed.

Do small jobs like plastering need a party wall survey?

No. The Act covers structural works affecting shared walls and foundations, and excavation within three to six metres of a neighbouring structure. Cosmetic work such as painting or replastering does not trigger a notice. Always check whether your works cut into, or take support from, a shared wall.

The Act and Its Sections

What does the Party Wall etc. Act 1996 cover?

The Act regulates works to shared walls and party fence walls, and excavations within three or six metres of a neighbouring structure. It requires you to serve notice and, if a dispute arises, to appoint surveyors who produce a binding award. It is an enabling Act: it exists to let works proceed safely, not to stop them.

What are Sections 1, 2, and 6 of the Act?

Section 1 covers building a new wall at or astride the boundary line. Section 2 covers works to an existing party wall, such as cutting in a beam or raising the wall. Section 6 covers excavation within three metres and deeper than the neighbour's foundations, or within six metres on a deeper angle. Each carries its own notice period. Our Section 6 excavation notices page covers the deepest of these.

How much notice do I have to give under the Act?

Two months for works to a party structure under Section 2. One month for a line of junction notice under Section 1 and for excavation under Section 6. These are statutory minimums. Serving earlier helps you secure consent and plan around any dissent without delaying your build.

Does the Party Wall Act apply in Scotland?

No. The Party Wall etc. Act 1996 applies to England and Wales only. Scotland relies on common law and separate statutes, and Northern Ireland has no direct equivalent. If your property is in England or Wales and the works are notifiable, the Act applies in full.

Does the Act cover garden walls and fences?

Yes, where the wall is masonry and built astride the boundary, which makes it a party fence wall. Timber fences are not covered. Building or altering a party fence wall needs notice and, if the neighbour dissents, an award.

Party Wall Notices

What is a party wall notice?

A party wall notice is the formal letter served on adjoining owners telling them about your proposed works under the Act. It must describe the works, include relevant drawings, and state when you intend to start. It is the first step in the process. For a boundary wall specifically, see our line of junction notice guide.

What makes a party wall notice invalid?

Common faults include an inaccurate address, a missing description of the works, no drawings, wrong dates, or too short a notice period. An invalid notice does not start the clock and can be challenged later. This is one of the most common reasons projects stall, so precise drafting matters.

What happens if my neighbour does not respond to the notice?

If they neither consent nor dissent within 14 days, the law treats their silence as deemed dissent. You then move to appointing surveyors. Silence is not permission to start, and treating it as consent can invalidate your works.

How do I serve a party wall notice?

You can deliver it by hand, by post, or electronically if the neighbour has agreed to that method. To be valid it must name you, describe the works, give the start date, and be properly addressed to the owner. Keep proof of service.

Can I reuse an old party wall notice for new works?

No. Each project needs its own notice and, where required, its own award. Notices are specific to the works they describe, and a notice is generally only valid for a year. Reusing an old one risks non-compliance.

Party Wall Awards

What is a party wall award?

A party wall award is the binding document the appointed surveyors produce under Section 10 once a dispute arises from a notice. It sets out the permitted works, protection for the neighbouring property, access, working hours, and how damage is handled. It binds both owners and covers only the works it describes. See our party wall agreements and awards page.

Is a party wall agreement the same as an award?

Yes. People often say agreement, but the correct legal term for the document the surveyors draw up is an award. It records the rights, responsibilities, and the works permitted.

How binding is a party wall award?

It is binding on both owners once served and enforceable in court. If a party refuses access or ignores the agreed terms, the other can seek an injunction to enforce it. Either owner has 14 days to appeal an award to the County Court.

How long does a party wall award remain valid?

It is valid for the works it describes. If you significantly change the design or delay for a long time, you may need fresh notices and a new award. An award does not give open-ended permission for future works.

Can I draft my own party wall award?

No. Only appointed surveyors have the power to make an award under the Act. An owner or contractor cannot produce a legally valid one, and attempts to do so are unenforceable.

Appointing Surveyors

Can one surveyor act for both parties?

Yes. If both owners agree, a single agreed surveyor can act impartially for both. This usually saves time and money because there is no second surveyor to negotiate with. On complex or contentious projects, separate surveyors are often the safer route. Our guide on appointing a surveyor under Section 10 compares both routes.

What happens if my neighbour refuses to appoint a surveyor?

After a written request, if they fail to appoint within 10 days you can appoint a surveyor to act on their behalf so the process is not blocked. You cannot simply use your own surveyor for both sides in that situation. A genuinely independent surveyor must be appointed for the non-responding owner.

What is the third surveyor and when do they step in?

Where each side has its own surveyor, the two select a third surveyor at the outset. The third surveyor takes no part unless the two cannot agree, at which point either surveyor or either owner can refer the matter for a binding decision. On most jobs the third surveyor is named and never needed.

Can my architect act as my party wall surveyor?

Only if both owners agree and the architect is genuinely impartial. Because your architect designed the works, neighbours often reject them as not independent. A separate surveyor who knows party wall law is the safer choice.

Can a surveyor appointment be cancelled?

A party-appointed surveyor's appointment cannot be rescinded once made. An agreed surveyor's appointment can be ended by either party. This is why the choice between an agreed surveyor and two surveyors matters where the relationship may sour.

Costs and Fees

Who pays for the party wall surveyor?

Usually the building owner, the person carrying out the works, pays both their own surveyor's fees and the adjoining owner's reasonable fees. This reflects the principle that the building owner is exercising rights under the Act. Costs are determined within the award under Section 10(13).

How much do party wall surveyors charge in London?

For a straightforward loft conversion or extension, fees commonly run from £800 to £1,500. Where several neighbours are involved, or a basement, costs can rise to £3,500 or more. Always get a clear written quote or fixed fee. Our party wall tools include a cost calculator.

Can party wall costs ever be shared between neighbours?

Yes, where both owners benefit from the works. For example, if you and your neighbour agree to build or raise a shared wall, the cost can be apportioned by benefit. The surveyors decide any split in the award.

What is Section 11(11) and enclosure costs?

If you build a wall and your neighbour later makes use of it by building against it, Section 11(11) entitles you to recover a fair share of the original cost from them at that point. This is known as an enclosure cost. It is one of the more overlooked financial provisions of the Act.

Do cheaper surveyors save money?

Not always. An inexperienced surveyor who serves an invalid notice or drafts a weak award can trigger disputes that cost far more than the fee saved. Choose on party wall experience and clarity, not price alone.

Access Rights

Can my neighbour access my property for party wall works?

Yes, where a valid notice and award are in place and they give at least 14 days' written notice under Section 8. Access must be confined to what the works genuinely need. Our guide to access rights under Section 8 covers this in full.

Am I entitled to compensation for access to my property?

Yes. Section 8(5) entitles you to compensation for loss or damage caused by access, including scaffolding over your garden and general inconvenience. A reasonable compensation offer is best agreed in the award.

What happens if I refuse reasonable access?

Unreasonable refusal can lead to a County Court access order, and obstruction is a criminal offence under Section 16 of the Act carrying a fine of up to £1,000. Courts regularly award costs against owners who refuse access without good grounds.

Does Section 8 cover works not under the Act?

No. Section 8 access only applies to notifiable works. For non-notifiable maintenance or repair that still needs neighbour access, the route is the Access to Neighbouring Land Act 1992, which is a separate court application.

Damage and Disputes

What happens if the works damage my property?

The building owner must make good any damage or compensate you for it. The schedule of condition is the deciding evidence, because surveyors compare the before and after to establish what the works actually caused. If the parties cannot agree, the surveyors determine the repair.

If my builder causes damage, am I responsible?

Yes. As the building owner you remain responsible for works carried out on your behalf. You may have a separate contractual claim against your builder, but under the Act you compensate your neighbour first and deal with your builder separately.

What if a dispute cannot be resolved by the surveyors?

Where the two appointed surveyors disagree, the matter goes to the third surveyor for a binding decision, which avoids court in most cases. If an award is genuinely wrong, either party can appeal to the County Court within 14 days. Our dispute resolution page explains the routes.

What is the biggest mistake homeowners make?

Starting works without serving notice, or assuming a friendly chat is enough. Even with a cooperative neighbour you must serve a formal notice and prepare a schedule of condition, or you can be held liable for pre-existing cracks and face delay.

If You Are the Building Owner

I am planning works. What is my first step?

Confirm whether your works are notifiable, then serve the correct notice on every affected owner well before your build date. Getting the notice type and the owner list right at the start is what keeps the project on schedule. Our building owner survey service handles this end to end.

How early should I serve notice before starting work?

Serve at least the statutory minimum, two months for party structure works and one month for line of junction or excavation, but earlier is better. Most delays come from leaving notices to the last minute, then waiting on responses while contractors stand by.

Can my neighbour stop my extension or basement?

No. The Act is an enabling Act. A neighbour cannot veto lawful works that have planning permission. They can require the works to be done properly and their property protected, but the outcome is a surveyor-led award, not a cancellation.

What happens if I skip the party wall process?

Your neighbour can seek an injunction stopping the works until you comply, and can claim damages and recover legal costs. Proceeding without valid notices also strips you of the Act's protections and can expose you to a nuisance claim, as confirmed in Louis v Sadiq. See our legal insights and case studies.

If You Are the Adjoining Owner

I have received a party wall notice. What should I do?

You have three options within 14 days: consent, dissent and appoint your own surveyor, or dissent and agree to a single surveyor. Doing nothing counts as dissent. Appointing your own surveyor costs you nothing in most cases, because the building owner pays reasonable fees. Our adjoining owner survey service represents you.

Does consenting mean I lose protection?

No, but you should still ask for a schedule of condition before works begin. Consent removes the need for a full award, but it does not remove the building owner's liability for damage. A documented record is your best protection if cracks appear later.

Will appointing my own surveyor cost me anything?

In almost all standard residential cases, no. The building owner pays the adjoining owner's reasonable surveyor fees under Section 10(13). You get independent representation looking after your interests at the building owner's expense.

Can I refuse the works altogether?

You cannot veto lawful works, but you can insist they are carried out safely, that your property is protected, and that the award sets fair terms on hours, access, and damage. Your surveyor's job is to secure those protections for you.

Flats, Leasehold and Special Cases

Can a tenant sign a party wall notice?

Only a tenant with a lease longer than 21 years, or a freeholder, counts as an owner under the Act. Tenants on shorter leases cannot consent or dissent and should pass the notice to the freeholder.

What if the adjoining property has a freeholder and leaseholders?

Both freeholders and qualifying leaseholders are adjoining owners under the Act, so you may need to serve notice on each of them. Where the freeholder and leaseholder are the same person, you serve the freeholder. Each owner who dissents can appoint their own surveyor.

How do I serve notice on a company or body corporate?

Deliver the notice to the secretary or clerk at the company's registered or principal office, or send it there by post. Serving an individual at the property is not valid service on a company.

What if my neighbour lives abroad?

You must still serve the legal owner at their last known residential or business address. A copy by email or to a managing agent is sensible but does not replace formal service. If the notice is returned undelivered, take legal advice before proceeding.

Do party wall rules differ for a flat versus a house?

The Act applies to both, but in flats the party structure includes floors and ceilings between units, not just walls. That means works to a floor or ceiling shared with the flat above or below can be notifiable, and the ownership structure usually means more owners to serve.

London and Location Questions

Do I need a local party wall surveyor for my borough?

Local knowledge matters more than most people expect. A surveyor who works your borough understands the property types, ground conditions, conservation rules, and the other surveyors who often represent neighbours. We cover all 33 London boroughs, including Bromley and Wandsworth.

Why do basements cost more in some London boroughs?

Basements involve excavating below existing foundations, which usually needs separate surveyors, monitoring, and detailed award drafting. In riverside areas on the Thames floodplain the high water table adds waterproofing and monitoring. On London Clay, heave and settlement risk drives extra protection. All of this raises the fee.

Does a conservation area change my party wall obligations?

The party wall obligations do not change, but the award often does. In conservation areas the award commonly specifies heritage-appropriate making good, such as lime mortar and plaster rather than cement. Conservation status also affects planning, which runs separately from the party wall process.

Why are party wall issues so common in London terraces?

London's Victorian and Edwardian terraces share solid walls from foundation to roof, and many were built without proper foundation separation. That density means most loft conversions, rear extensions, and basements touch a party wall or a neighbour's foundations, which is why notices are needed so often.

Related Guides

• Complete Guide to the Party Wall Act 1996
• Appointing a Surveyor Under Section 10
• Access Rights Under the Party Wall Act
• Schedule of Condition Reports
• Party Wall Tools and Calculators
• Party Wall Legal Insights and Case Studies

Legal Disclaimer

These answers are provided for educational and general guidance purposes only and do not constitute legal or surveying advice. The Party Wall etc. Act 1996 is complex and its application depends on the facts of each project. Cost figures are typical market ranges, not fixed quotes, and case law is summarised for educational purposes. Always instruct a qualified party wall surveyor before serving notices or starting notifiable works. Survey of Party Wall accepts no liability for actions taken or omitted in reliance on this content. Last reviewed: June 2026.