Party Wall Act Sections Explained:
Sections 1, 2, 3, 6, 7, 8, 10 and 12 — Plain English Guide 2026
The Party Wall etc. Act 1996 has 20 sections. Eight matter to most property owners planning building work. Section 1 covers new boundary walls (1 month notice). Section 2 covers works to existing party walls — the most common trigger (2 months notice). Section 3 gives adjoining owners the right to request additional works by counter-notice. Section 6 governs excavation within 3 to 6 metres of a neighbour’s foundations (1 month notice). Sections 7, 8, 10 and 12 cover compensation, rights of entry, dispute resolution, and security for expenses. This guide explains all eight with notice periods, triggers, and case law.
What the Act Does and Why It Exists
The Party Wall etc. Act 1996 is not a planning or building regulations control. It is a separate, notice-driven dispute resolution framework covering specific types of building work near or on shared boundaries in England and Wales. It gives property owners the right to carry out certain works while protecting neighbours through a structured notification, consent, and award process.
The Act exists because building near a shared wall or boundary creates genuine risk to both properties. Without a formal framework, disputes over damage, access, and construction methods would go straight to court. The Act creates an alternative: serve notice, follow the process, appoint surveyors if needed, and settle the terms of construction through a binding award before work starts.
The three key roles
Building Owner: The person carrying out the proposed works. They have the right to carry out the works but must follow the Act’s notice and process requirements.
Adjoining Owner: The owner of any property affected by the proposed works — typically the neighbouring freeholder or long leaseholder. They have the right to be notified, to consent or dissent, and to protection under the award.
Party Wall Surveyor: An independent professional appointed to resolve disputes by making awards. Surveyors have a statutory duty to act impartially regardless of who appoints them — confirmed in Power and Kyson v Shah [2023]. They are adjudicators, not advocates.
The universal process across all sections
Building Owner serves notice
Formal written notice served on all affected adjoining owners. Notice period depends on the section (1 month or 2 months).
14-day response window
Adjoining owner has 14 days to respond in writing — consent, dissent, or counter-notice. No response after 14 days = deemed dissent.
Path A: Written consent
Adjoining owner consents in writing. Works can proceed. A schedule of condition is strongly advisable even on consent.
Path B: Dissent or no response
Dispute is treated as having arisen. Section 10 kicks in. Surveyor(s) must be appointed to resolve the dispute by award.
Surveyor appointment and award
Surveyors appointed (agreed or separate). They prepare and serve a party wall award setting out permitted works, conditions, and protections. Works begin once award is served.
Critical case law: Power and Kyson v Shah [2023] confirmed that no valid notice means no Act procedure. The dispute and award process cannot be triggered retrospectively. Notice is the non-negotiable starting point for every section.
All Sections at a Glance
Eight sections of the Party Wall etc. Act 1996 are directly relevant to most residential building projects. Three require formal notices before works can begin. Five govern rights, duties, compensation, disputes, and financial protections during and after the process.
| Section | Subject | Notice Required | Notice Period |
|---|---|---|---|
| Section 1 | New wall on the line of junction | Yes | 1 month |
| Section 2 | Works to existing party walls | Yes | 2 months |
| Section 3 | Counter-notice by adjoining owner | Response only | 1 month from receipt |
| Section 6 | Adjacent excavation — 3m and 6m rules | Yes | 1 month |
| Section 7 | Compensation and protection obligations | No notice | Applies throughout |
| Section 8 | Rights of entry | No notice | 14 days reasonable notice |
| Section 10 | Dispute resolution and surveyor appointments | No notice | Triggered by dispute |
| Section 12 | Security for expenses | No notice | Requested before works |
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Free consultation. We confirm which notices you need before you serve anything.Section 1 — New Wall on the Line of Junction
Section 1 applies when you want to build a brand new wall on or near the boundary line between your property and your neighbour’s, where no wall currently exists. The notice period is 1 month. This section covers both walls built astride the boundary (shared ownership) and walls built entirely on your own land.
New Wall on the Line of Junction
Applies where no wall currently exists on the boundary
Section 1 is triggered when you want to build a new wall on or astride the boundary between your property and a neighbour’s property. The critical qualifier is that no existing wall currently stands on the line of junction — if a wall already exists, Section 2 applies instead.
The two notice scenarios
Wall to be built astride the boundary (Section 1(2)): If you want the wall to sit on the boundary line itself, sharing ownership with your neighbour, you serve a 1 month notice. Your neighbour can consent and share the cost (gaining co-ownership), consent but refuse to pay (the wall is then built entirely on your land but you can use projecting foundations under their land), or dissent entirely (you must build wholly on your own land).
Wall to be built entirely on your own land (Section 1(6)): If you plan to build on your own side of the boundary but need foundations that project under the neighbour’s land, a 1 month notice is still required. This is common with deeper foundations on narrow plots.
Common projects involving Section 1
- New side wall for a side extension where the boundary currently has only a fence
- New party fence wall replacing an old fence along a shared garden boundary
- New garage or outbuilding wall intended to sit on the boundary line
Common pitfall
Always verify the exact boundary line against Land Registry title plans before serving a Section 1 notice. An incorrect boundary identification in the notice — even a small one — can invalidate the entire notice and restart the clock. A boundary survey is worth commissioning if there is any doubt about where the line falls.
Section 2 — Works to Existing Party Walls
Section 2 is the most commonly invoked section of the Act. It covers a defined list of works to existing party walls, party structures, and boundary walls — including cutting in, raising, lowering, rebuilding, underpinning, and bearing new structural loads onto the wall. The notice period is 2 months. Most loft conversions, rear extensions, and internal structural alterations in terraced housing trigger Section 2.
Works to Existing Party Walls
Most commonly triggered section — covers all significant works to shared walls
Section 2(2) lists the specific operations that require a notice. If your proposed works include any of the following, a Section 2 notice must be served at least 2 months before the intended start date.
Works covered by Section 2(2)
- Cutting into a party wall — creating a new opening, chasing in a beam pocket, installing a padstone, inserting a damp-proof course
- Raising or lowering a party wall — increasing the height (common for loft conversions) or lowering the level of a party wall
- Demolishing and rebuilding a party wall — where the wall is structurally unsound or requires major structural change
- Underpinning a party wall — any work to strengthen or stabilise the existing foundations
- Exposing a party wall — where the other side has been enclosed (for example, where a cupboard or room has been built against it)
- Bearing new loads onto a party wall — new floor joists, steel beams, or structural members bearing onto the shared wall
- Cutting away chimney breasts — removing a projecting chimney breast from a party wall
- Weather-proofing a party wall — exposed at the junction with a new adjoining building
Serving a valid Section 2 notice
The notice must identify the building owner by full legal name, identify each adjoining owner by full legal name, state the address of both properties, describe the proposed works precisely (referencing the relevant subsections of Section 2(2)), and state a proposed start date at least 2 months after service.
Who is the “adjoining owner”? For leasehold properties this is not always the person living next door. The adjoining owner is the freeholder or any leaseholder with a lease of more than 1 year. For flats you may need to serve the freeholder and the lateral neighbour separately. Check Land Registry to confirm all owners before serving.
Schedule of condition
A schedule of condition is a photographic and written record of the adjoining property’s condition before works start. It is not mandatory under Section 2, but it is the building owner’s primary protection against spurious damage claims. Taylor v Jones [2024] confirmed that damage claims require proof of causation — a thorough pre-works condition record provides the evidence base for that assessment.
Section 3 — Counter-Notice by the Adjoining Owner
Section 3 gives the adjoining owner the right to serve a counter-notice requesting that additional works be carried out at the same time as the building owner’s proposed works. The counter-notice must be served within 1 month of receiving the original party wall notice. The adjoining owner pays for any additional works that benefit only them. Section 3 is often missing from explanations of the Act — it is a genuine and important right.
Counter-Notice by the Adjoining Owner
The adjoining owner’s right to request additional concurrent works
When a building owner serves a Section 2 notice, the adjoining owner does not have to choose only between consenting and dissenting. Section 3 gives them a third option: serving a counter-notice requesting that the building owner also carry out additional works that would benefit the adjoining owner’s property — works that make practical sense to do at the same time while the shared wall is already being worked on.
What a counter-notice can request
- Building up the party wall to a greater height or thickness than the building owner proposed
- Making good the party wall to a higher standard than the minimum proposed
- Carrying out other works to the party wall that would benefit the adjoining owner’s property
Who pays for counter-notice works?
The cost of any additional works requested in the counter-notice is borne by the party who benefits from them. Where the additional work benefits only the adjoining owner, the adjoining owner pays. Where both owners benefit, costs are shared proportionately.
Building owner’s response to a counter-notice
The building owner has 14 days to consent or dissent to the counter-notice. If they dissent, a dispute arises and Section 10 applies. The surveyor(s) then resolve the dispute and incorporate the outcome into the award.
Practical example: A building owner serves a Section 2 notice to raise a party wall for a loft conversion. The adjoining owner wants the wall raised further than proposed to enable their own future loft conversion. The counter-notice requests the additional height. The adjoining owner pays for the extra height. The building owner pays for the height they need. Both are done in one operation.
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Free consultation for adjoining owners. We advise on counter-notices and schedule of condition.Section 6 — Adjacent Excavation: The 3 Metre and 6 Metre Rules
Section 6 requires a notice where excavation takes place within 3 metres of a neighbour’s building or structure and goes deeper than the bottom of their foundations (the 3 metre rule), or within 6 metres where a 45-degree line from the bottom of their foundation would intersect the proposed excavation (the 6 metre rule). The notice period is 1 month. Section 6 is most commonly triggered by basement excavations, deep extension foundations, and piling.
Adjacent Excavation and Construction
The 3 metre and 6 metre excavation notice rules
The 3 metre rule — Section 6(1)
A Section 6 notice is required if all three conditions apply:
- You intend to excavate within 3 metres of the adjoining owner’s building or structure
- The excavation will go deeper than the bottom of the adjoining building’s foundations
- The purpose is to erect or construct a building or structure
The 6 metre rule — Section 6(2)
A separate Section 6 notice is required if:
- You intend to excavate within 6 metres of the adjoining owner’s building
- A line drawn at 45 degrees downwards from the bottom of the adjoining foundation would intersect the proposed excavation
The 6 metre rule catches deep foundation construction — basement excavations, piling, and diaphragm wall construction — where the zone of influence on the adjoining property’s foundations extends beyond the standard 3 metre zone.
What the Section 6 notice must include
In addition to the standard notice requirements, a Section 6 notice must include plans and sections showing the proposed excavation, the site of the new building or structure, and its depth. The notice must be accompanied by drawings sufficient for the adjoining owner to understand the relationship between the proposed excavation and their property.
The adjoining owner’s rights under Section 6
Where a Section 6 notice is served, the adjoining owner can request that the building owner underpin or otherwise strengthen the foundations of their building at the building owner’s expense, where such strengthening is reasonably required as a consequence of the proposed excavation. This right is most relevant for basement projects where the new excavation creates a material change in the load conditions around the adjoining foundations.
Engineering note: Section 6 work is structurally complex. The party wall award for basement excavations typically requires a method statement from the structural engineer, a pre-agreed monitoring regime (crack monitors, inclinometers, settlement markers), and in some cases Section 12 security for expenses to cover potential damage. Engage a structural engineer with ground engineering experience alongside your party wall surveyor.
Section 7 — Compensation and Protection Obligations
Section 7 places statutory obligations on the building owner to carry out all works causing the least possible inconvenience, to make good all damage caused to the adjoining owner’s property, and to compensate the adjoining owner for any loss or inconvenience resulting from the works. Section 7 also prohibits the building owner from unnecessarily closing up lights or other openings the adjoining owner is entitled to use.
Compensation and Protection Obligations
Building owner’s duties to protect and compensate the adjoining owner
The “least possible inconvenience” obligation
Section 7(1) requires that all works under the Act are carried out in a manner that causes “the least possible inconvenience” to the adjoining owner and occupiers. This is not a weak obligation — it directly informs the award conditions on working hours, vibration limits, noise restrictions, and access management.
Making good all damage
Section 7(2) requires the building owner to make good, or compensate for, all damage caused to the adjoining owner or occupier by works carried out under the Act. Taylor v Jones [2024] confirmed that this obligation requires proof of causation — the building owner is liable for damage they actually caused, not for all defects that happen to exist after the works. A thorough schedule of condition is the primary evidence base for this assessment on both sides.
Compensation for loss and inconvenience
Section 7 extends beyond physical damage to property. It covers financial loss — loss of rental income, trade disruption, and other losses directly attributable to the works. The award will typically include a claims procedure covering how damage is reported, how liability is assessed, and how repairs are carried out or compensated.
Protection of lights and openings
Section 7(3) prohibits the building owner from unnecessarily closing up or blocking any window or light that the adjoining owner has the right to use. This applies during works (construction hoarding, scaffolding, stored materials) and not just to the permanent structure. Temporary obstruction during building operations must be minimised.
Section 8 — Rights of Entry
Section 8 gives surveyors and workmen appointed under the Act the right to enter the adjoining owner’s property at reasonable times, with at least 14 days’ notice, to carry out works authorised by the Act or to inspect the state of the party wall. The right of entry cannot be unreasonably refused. Obstructing or refusing access without good reason can result in the cost of any delay being attributed to the obstructing party.
Rights of Entry
Statutory access rights for surveyors and workers
Who has the right of entry
Section 8(1) grants rights of entry to the building owner and any person authorised by the building owner — including the party wall surveyor and the appointed contractors. The right extends to entering, remaining on, and passing over the adjoining land for the purpose of carrying out works under the Act.
The 14-day notice requirement
Section 8(2) requires at least 14 days’ notice before exercising the right of entry except in cases of emergency. The notice must be given in writing. In practice, most surveyors arrange access informally at a mutually convenient time and reserve the formal notice for situations where the adjoining owner is uncooperative.
Access for schedule of condition surveys
The right of entry under Section 8 extends to surveying the condition of the property before works begin. Where an adjoining owner refuses access for a pre-works condition schedule, the surveyor may need to proceed based on what can be observed from accessible areas. This creates risk for the adjoining owner — a limited condition record means less evidence to support damage claims after the works.
Practical advice for adjoining owners: Grant access for the schedule of condition. It protects you. A comprehensive photographic record of your property before works start is your strongest tool if damage occurs later and liability is disputed.
Section 10 — Dispute Resolution and Surveyor Appointments
Section 10 is the dispute resolution engine of the Act. When a dispute arises — including deemed dissent after 14 days of no response — Section 10 governs how surveyors are appointed, how they make awards, what awards must contain, how appeals work, and the surveyor’s duty of impartiality. Section 10(4) is the specific power allowing appointment of a surveyor on behalf of a non-responding adjoining owner.
Resolution of Disputes
Surveyor appointment, awards, impartiality, and appeals
Types of surveyor appointment
Agreed surveyor: Both owners jointly appoint one surveyor to act for both. Faster and cheaper — requires some cooperation from both parties.
Separate surveyors: Each owner appoints their own surveyor. The two surveyors jointly select a third surveyor at the outset as a tiebreaker. Works independently to produce a joint award.
Section 10(4) — appointment on behalf of a non-responding party
Where the adjoining owner fails to appoint a surveyor within 10 days of a written request, the building owner’s surveyor can appoint a surveyor on their behalf. This was confirmed as valid and effective in Onigbanjo v Pearson [2008]. The appointed surveyor represents the adjoining owner’s interests fully regardless of how they were appointed. A neighbour cannot block progress by simply not engaging with the process.
The duty of impartiality
Section 10 places a duty of impartiality on every party wall surveyor regardless of who appoints them. Power and Kyson v Shah [2023] reinforced this — a surveyor appointed by the building owner must still act impartially to resolve the dispute fairly. Party wall surveyors are adjudicators, not advocates for the party paying their fee.
What goes into a party wall award
Permitted works — exact description of what is authorised
Method statement — how works must be carried out
Schedule of condition — pre-works record incorporated
Working hours — restrictions on noisy operations
Access provisions — surveyor and contractor entry rights
Damage procedure — how damage is reported and remedied
Third surveyor — named tiebreaker identified at outset
Fees and costs — who pays surveyors and at what rate
Monitoring — crack monitors, movement records where required
Security for expenses — escrow amount if Section 12 applies
Appealing an award
Either party has 14 days from service of the award to appeal to the county court. Louis v Sadiq [1997] established that the county court can rescind, modify, or confirm an award on appeal. The 14-day window runs from service — not from when you read the award. Read every award on the day it is received and get professional advice immediately if anything is unclear.
Section 12 — Security for Expenses
Section 12 allows the adjoining owner to request that the building owner deposit a sum of money in a joint account or with a stakeholder as security against potential damage before works begin. The amount is determined by the surveyor(s) based on the risk profile of the proposed works. It is most commonly requested for basement excavations, underpinning, and piling projects where the risk of damage to the adjoining property is measurable and substantial.
Security for Expenses
Escrow deposit to protect against damage before works start
When Section 12 is appropriate
Section 12 security is not automatic — it must be requested by the adjoining owner and must be justified by the nature of the proposed works. The surveyor(s) determine the appropriate amount based on an assessment of the potential damage risk. Projects most likely to generate a Section 12 request include:
- Basement excavations within proximity to the adjoining foundation
- Underpinning works to a shared party wall
- Deep piling with vibration risk to adjacent structures
- Any project where the structural engineer’s calculations show material proximity to the adjoining foundation zone
How the security works in practice
The agreed sum is held in a joint account or with a stakeholder (typically a solicitor). If damage occurs and the building owner fails to make good within the agreed timescale, the adjoining owner can draw on the security to fund repairs without needing to pursue the building owner through court. The money is returned to the building owner at the conclusion of works if no damage occurred or after all damage claims have been resolved.
Building owner considerations
A Section 12 request is not a sign of bad faith — it is a legitimate statutory right. Objecting to a reasonable security request typically delays the award and the project start. Building owners are better served by agreeing a proportionate amount and banking the goodwill with the adjoining owner’s surveyor than by contesting security requests that reflect genuine risk.
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The most expensive party wall mistakes come from serving defective notices, starting works before the process is complete, and failing to commission a schedule of condition before works begin. These two checklists cover the minimum requirements for both sides.
Building Owner — Before You Serve Notice
- Identify all adjoining owners by full legal name via Land Registry — freeholders, leaseholders with leases over 1 year, and all affected neighbours
- Confirm which sections apply — Section 1, 2, and/or 6 — and prepare separate notices for each where required
- Prepare accurate drawings showing the relationship between the proposed works and the boundary and party wall
- Draft the notice with precise work descriptions referencing the specific subsections of the Act
- State a proposed start date that is at least 1 month (Sections 1 and 6) or 2 months (Section 2) after the intended service date
- Serve by recorded delivery and retain the posting receipt as proof of service date
- Wait 14 days for written responses — do not start works during the notice period
- Commission a schedule of condition regardless of whether the adjoining owner consents or dissents
- Appoint your party wall surveyor before the notice period expires if dissent is likely on a complex project
Adjoining Owner — On Receiving a Notice
- Read the notice carefully — check the building owner’s name, your name, both addresses, the works description, and the proposed start date
- Check whether the works are correctly described and whether the notice period is compliant
- Consider whether a counter-notice under Section 3 would be advantageous — you have 1 month from receipt to serve one
- Do not ignore the notice — no response after 14 days is treated as dissent and triggers surveyor appointment
- If you consent, request a schedule of condition — this protects you regardless of whether the works cause damage
- If you dissent, appoint a qualified party wall surveyor promptly — your reasonable fees are paid by the building owner under Section 10(13)
- Consider whether Section 12 security for expenses is appropriate given the nature and proximity of the proposed works
- Grant access for the pre-works condition survey — refusing access weakens your position on any future damage claim
Frequently Asked Questions
Which sections of the Party Wall Act apply to a rear extension?
A typical rear extension can trigger multiple sections. Section 2 applies if you are cutting into or bearing loads on an existing party wall. Section 6 applies if your foundation excavation is within 3 metres of your neighbour’s foundations and goes deeper. Section 1 applies if you are building a new wall on the boundary line. All three can apply to the same project — each requires a separate notice.
What is the difference between Section 1 and Section 2?
Section 1 applies to brand new walls being built on the line of junction where no wall currently exists — typically a new side or boundary wall. The notice period is 1 month. Section 2 applies to works on existing party walls — cutting into them, raising them, underpinning them, or bearing new structural loads on them. The notice period is 2 months. Both can apply to the same project.
What is a counter-notice under Section 3?
A counter-notice under Section 3 allows the adjoining owner to request that additional works are carried out at the same time as the building owner’s proposed works, where those additional works would benefit the adjoining owner. It must be served within 1 month of receiving the original notice. The adjoining owner pays for any additional works that benefit only them.
What is the 3 metre rule and 6 metre rule under Section 6?
The 3 metre rule under Section 6(1) requires a notice where excavation is within 3 metres of a neighbour’s building and goes deeper than the bottom of their foundations. The 6 metre rule under Section 6(2) applies where excavation is within 6 metres and a 45-degree line drawn from the bottom of the neighbour’s foundation would intersect the proposed excavation. Both require 1 month notice.
What does Section 7 require of the building owner?
Section 7 requires the building owner to carry out all works causing the least possible inconvenience to the adjoining owner, to make good all damage caused by the works, and to compensate for any loss or inconvenience. It also prohibits unnecessarily closing up windows or lights the adjoining owner is entitled to use. Under Taylor v Jones [2024], making good damage requires proof of causation — the building owner is liable for what they caused, assessed against the pre-works schedule of condition.
What is Section 10(4) of the Party Wall Act?
Section 10(4) allows the building owner’s surveyor to appoint a surveyor on behalf of the adjoining owner where the adjoining owner fails to appoint their own within 10 days of a written request. This prevents a neighbour from blocking a project by not engaging. The power was confirmed as valid in Onigbanjo v Pearson [2008]. A surveyor appointed under Section 10(4) represents the adjoining owner’s interests fully and independently.
What is security for expenses under Section 12?
Section 12 allows the adjoining owner to request that the building owner deposits money in escrow before works begin as security against potential damage. The amount is set by the surveyor(s) based on the risk of the proposed works. It is held until works complete and all damage claims are resolved. Most commonly requested for basement excavations, underpinning, and piling projects.
What happens if I start work without serving a party wall notice?
Starting notifiable works without a valid party wall notice is a breach of the Act. Under Power and Kyson v Shah [2023], the Act’s dispute and award procedure cannot be triggered retrospectively where no notice was served. Your neighbour can apply to the county court for an injunction to stop the works, and any damage claims become common law disputes rather than being handled through the Act’s structured award process — typically more costly and less certain for both parties.
Reference Summary
Legislation
Party Wall etc. Act 1996 — Sections 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20
Notice Periods by Section
Section 1 — New wall on the line of junction: 1 month
Section 2 — Works to existing party walls: 2 months
Section 3 — Counter-notice by adjoining owner: 1 month from receipt of original notice
Section 6 — Adjacent excavation (3m and 6m rules): 1 month
Case Law Applied
Power and Kyson v Shah [2023] — Court of Appeal
No valid notice means no Act procedure. Surveyor duty of impartiality confirmed even for party-appointed surveyors.
Taylor v Jones and another [2024] — Court of Appeal
Damage liability under Section 7 requires proof of causation. Schedule of condition is the primary evidence base.
Onigbanjo v Pearson [2008] — County Court
Section 10(4) appointment on behalf of non-responding adjoining owner confirmed as valid. Building owner responsible for reasonable adjoining owner fees under Section 10(13).
Louis v Sadiq [1997] — Court of Appeal
County court power to rescind, modify, or confirm awards on appeal. 14-day appeal window from service.
Gyle-Thompson v Wall Street (Properties) Ltd [1974] — Chancery Division
Surveyors must consider condition and character of existing wall when specifying works in an award.
Selby v Whitbread and Co [1917] — King’s Bench Division
Service to registered owner’s address is valid even without acknowledgement. Applies to absentee and overseas owners.
Professional Standards
Faculty of Party Wall Surveyors (FPWS) best practice guidelines
Pyramus and Thisbe Club guidance on the Party Wall etc. Act 1996
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