Party Wall Agreement: A Complete Guide for Property Owners

The Party Wall etc. Act 1996 applies throughout England and Wales. It provides a statutory process for carrying out certain work to shared structures, building at a boundary and excavating close to neighbouring buildings.

Although property owners commonly use the term “Party Wall agreement”, the Act distinguishes between written consent and a Party Wall Award. Understanding that distinction can help you follow the correct procedure, avoid project delays and protect both properties.

Party Wall Agreement: Key Facts

Where does the Party Wall Act apply?

The Act applies in England and Wales. It does not apply in Scotland or Northern Ireland.

When must you serve notice?

You must serve the correct notice before starting work covered by the Act.

How long does a neighbour have to respond?

An adjoining owner normally has 14 days to consent or dissent after receiving a notice.

Can a neighbour prevent the work?

An adjoining owner can refuse consent, but they cannot normally veto work that the Act authorises. Their refusal creates a dispute that surveyors resolve under the statutory procedure.

Do you always need a surveyor?

No. If the adjoining owner gives written consent, you do not need to appoint surveyors under the Act. You may still choose to obtain a schedule of condition.

Who normally pays the surveyors?

The building owner undertaking the work usually pays the reasonable costs of the Party Wall process. The circumstances and conduct of the parties can affect the final allocation.

What happens when a neighbour does not reply?

If an adjoining owner does not respond to a Party Structure Notice or a Section 6 excavation notice within 14 days, a dispute is deemed to have arisen.

How long does a Party Wall notice remain valid?

The proposed work must normally begin within 12 months of the notice.

What Is a Party Wall Agreement?

“Party Wall agreement” is the commonly used description for the arrangements made under the Party Wall etc. Act 1996.

The term can refer to two different outcomes:

1. Written consent

The adjoining owner can consent in writing to the work described in a valid notice. The owners may also record practical arrangements covering working hours, access, protection and making good.

Written consent does not create a Party Wall Award. No statutory dispute arises and no surveyor needs to act under Section 10 of the Act.

2. A Party Wall Award

If the adjoining owner dissents or fails to respond within the relevant period, a dispute arises. The owners then appoint either one agreed surveyor or separate surveyors.

The appointed surveyor or surveyors resolve the matters in dispute by making a Party Wall Award. The Award can determine the time and manner of the work, protective measures, access arrangements, damage procedures and reasonable costs.

The Award binds the owners once it has been served, subject to the statutory right of appeal.

What Is the Difference Between a Notice, Consent and an Award?

A Party Wall notice starts the statutory procedure. The building owner serves it on every adjoining owner affected by the proposed work.

Written consent records the adjoining owner’s agreement to the notified work. Consent must relate to a valid notice and should remain clear and unambiguous.

A Party Wall Award resolves a dispute after the appointment of one or more surveyors. An Award does not represent an agreement negotiated between the owners. The surveyor or surveyors determine it under their statutory authority.

These distinctions matter because a friendly conversation with a neighbour does not replace a valid notice. Equally, written consent to a notice does not amount to a Party Wall Award.

When Do You Need a Party Wall Agreement?

The Party Wall etc. Act covers three main categories of work:

You may need to serve more than one type of notice if your project falls into several categories.

Building on the Line of Junction

Section 1 applies when you plan to build a new wall at the boundary between two properties.

Building astride the boundary

You must obtain the adjoining owner’s express consent before building a new wall astride the boundary. You cannot place part of the wall on your neighbour’s land simply because you served notice.

A notice must be served at least one month before you intend to start work. If the adjoining owner does not consent to an astride wall, you must generally keep the wall wholly on your own land.

Building wholly on your own land

You can normally build a new wall wholly on your land up to the boundary after serving the appropriate notice.

In some circumstances, the Act allows projecting ordinary footings to extend beneath adjoining land where they are necessary. It does not provide an automatic right to place special foundations on adjoining land without written consent.

Work to an Existing Party Wall or Party Structure

Sections 2 and 3 apply to specified work affecting a party wall or party structure.

Common examples include:

You must serve a Party Structure Notice at least two months before starting the notified work.

The notice should describe the proposed work clearly. It must identify the nature and particulars of the work and state when you intend to begin. More complex projects will require drawings, structural details and method statements so the adjoining owner and surveyors can assess the proposals properly.

Excavation Within Three or Six Metres

Section 6 applies to certain excavations close to neighbouring buildings or structures. It does not depend on whether the excavation physically touches a party wall.

The three-metre test

You must consider Section 6 when you plan to excavate within three metres of a neighbouring building or structure and any part of the proposed excavation will extend below the bottom of the neighbour’s foundations.

Both distance and depth matter. Excavating within three metres does not automatically trigger the Act if you remain above the bottom of the adjoining foundations.

The six-metre test

Section 6 can also apply when the excavation is within six metres of a neighbouring building or structure.

The test uses a line drawn downwards at 45 degrees from the bottom of the adjoining owner’s foundations. If the proposed excavation cuts through that line, you must serve notice.

This test often affects deep foundations, piling and basement construction.

You must serve a Section 6 notice at least one month before starting the excavation. The notice must include plans and sections showing the site and depth of the proposed excavation and the building or structure you intend to construct.

What Is a Party Wall?

The statutory definition covers more than a wall shared equally between two houses.

A Type A party wall forms part of a building and stands on land belonging to different owners. The boundary may run through the centre of the wall, but this is not always the case.

A Type B party wall stands wholly on one owner’s land but separates buildings belonging to different owners. Only the part of the wall that performs the separating function qualifies as the party wall.

A party fence wall is a masonry wall that stands on the land of different owners and separates their adjoining land without forming part of a building. A timber fence or concrete post-and-panel fence does not qualify as a party fence wall.

A party structure includes a party wall and can also include a floor, partition or other structure separating buildings or parts of buildings approached through separate staircases or entrances. This can affect flats, maisonettes and mixed-use buildings.

The Party Wall Act does not determine the legal boundary or ownership of the wall. You may need separate boundary advice where the wall’s position or ownership remains disputed.

What Work Does Not Normally Require a Party Wall Agreement?

The Act does not cover every alteration near a neighbouring property.

Work that will not normally require notice includes:

You should not rely on the size or cost of a project when deciding whether the Act applies. A relatively small structural alteration can require notice, while a larger project may fall outside the Act if it does not involve notifiable work.

An experienced Party Wall surveyor should review the drawings, foundation design and relationship with neighbouring structures before you start.

The Party Wall Agreement Process

Step 1: Review the proposed work

Identify which parts of the design fall under Sections 1, 2, 3 or 6. You may need input from the architect, structural engineer and Party Wall surveyor.

Step 2: Identify every adjoining owner

An adjoining owner can include a freeholder and a leaseholder with an interest exceeding one year. A property can therefore have several adjoining owners who each require notice.

Check current Land Registry information and relevant leasehold interests before serving notices.

Step 3: Prepare and serve the correct notice

The notice must identify the building owner, the relevant property and the proposed work. It must comply with the requirements of the relevant section.

Defective notices can invalidate later surveyor appointments and Awards, so accuracy matters.

Step 4: Allow the adjoining owner to respond

An adjoining owner can consent, dissent or take no action.

For Party Structure and Section 6 notices, a failure to respond within 14 days creates a deemed dispute.

Step 5: Appoint a surveyor or surveyors

If a dispute arises, the owners can concur in the appointment of one agreed surveyor.

Alternatively, each owner can appoint a separate surveyor. The two surveyors select a third surveyor at the start of the process. The third surveyor can determine referred matters if the appointed surveyors cannot agree or an owner makes a valid referral.

Party Wall surveyors must act impartially when exercising their statutory functions. They do not act as advocates in the same way as solicitors representing opposing clients.

Step 6: Record the adjoining property

The surveyor will usually prepare a photographic schedule of condition before work begins.

The Act does not expressly require a schedule of condition in every case, but it provides valuable evidence if the owners later disagree about whether the work caused damage.

Step 7: Review the technical information

The surveyors may review:

The complexity of the review should reflect the nature and risk of the work.

Step 8: Make and serve the Party Wall Award

The surveyor or surveyors make the Award once they have enough information to determine the dispute.

The Award may authorise the relevant work and regulate how it proceeds. It should not attempt to authorise work outside the scope of the Act or determine matters beyond the surveyors’ jurisdiction.

Step 9: Observe the appeal period

Either owner can appeal an Award to the county court within 14 days of service under Section 10(17).

An Award is conclusive and cannot otherwise be questioned in court except as provided by Section 10, although questions about jurisdiction or whether a document constitutes a valid statutory Award can require separate legal analysis.

Step 10: Carry out the work in accordance with the Award

The building owner and contractor must comply with the Award, approved drawings and relevant method statements.

Material design changes may require the surveyors to consider a further Award before the revised work begins.

How Can a Neighbour Respond to a Party Wall Notice?

Written consent

The adjoining owner can consent in writing. The work can then proceed without a statutory Award, subject to the notice, other legal requirements and any agreed arrangements.

Consent should not be unconditional where important technical information remains outstanding. Both owners should understand precisely what work the consent covers.

Dissent and use an agreed surveyor

Both owners can appoint the same person as the agreed surveyor. This can provide an efficient and proportionate solution for straightforward work.

Dissent and appoint separate surveyors

The adjoining owner can appoint their own surveyor. The building owner also appoints a surveyor, and the two surveyors select a third surveyor.

Take no action

For notices to which the deemed-dispute provisions apply, no response within 14 days creates a dispute.

The building owner must then request that the adjoining owner appoint a surveyor within a further 10 days. If the adjoining owner still fails to appoint, the building owner can make an appointment on their behalf under Section 10(4).

Can a Neighbour Refuse a Party Wall Agreement?

An adjoining owner can refuse to consent to a Party Wall notice. This does not normally give them a permanent right to prevent work that the Act authorises.

Their refusal creates a dispute that the appointed surveyor or surveyors resolve through a Party Wall Award.

The surveyors can regulate the time and manner of the work, require reasonable protections and address relevant costs. They cannot refuse lawful work simply because the adjoining owner dislikes the project.

Different rules apply to matters requiring express consent. For example, you cannot build a new wall astride the boundary or place special foundations on adjoining land without the required written consent.

How Much Does a Party Wall Agreement Cost?

The Act does not set fixed fees. The cost depends on the work, the number of adjoining owners and the time reasonably required to resolve the dispute.

The main cost factors include:

The building owner normally pays the reasonable costs of making or obtaining an Award because their proposed work created the need for the statutory process.

This does not give an adjoining owner or their surveyor an unrestricted right to incur costs. Fees must remain reasonable and proportionate. The surveyors can determine responsibility for costs under the Act.

If the adjoining owner requests additional work solely for their benefit, they may have to contribute to the additional expense.

How Long Does a Party Wall Agreement Take?

The timescale depends on how the adjoining owner responds and the complexity of the project.

Written consent

An adjoining owner may consent during the initial 14-day response period. Early discussions and complete information can help the owner make an informed decision.

Agreed surveyor

A straightforward project involving one agreed surveyor may take several weeks, depending on the availability of drawings, access for the schedule of condition and the quality of the technical information.

Separate surveyors

The process may take longer where each owner appoints a different surveyor. The surveyors need time to review the proposals, arrange access and agree the Award.

Complex projects

Basements, underpinning, piling and major commercial developments can require extensive technical review. The process may involve engineers, specialist method statements, monitoring arrangements, access agreements and security for expenses.

The statutory notice periods are minimum periods. They do not guarantee that the entire Party Wall process will finish within one or two months.

Start the process early, ideally while the project team develops the technical design.

What Should a Party Wall Award Contain?

The content should reflect the work and matters in dispute. A typical Award may include:

An Award should deal with project-specific risks. Surveyors should not treat it as a standard form that requires only names and addresses to change.

What Happens If You Start Work Without a Party Wall Agreement?

Failing to follow the Act does not automatically create a criminal offence or standard financial penalty. However, it can cause serious legal and commercial problems.

An adjoining owner may apply for an injunction to stop notifiable work. A court will consider the facts, including the nature of the work, the owner’s conduct and whether the Act should have been followed.

Starting without notice can also expose the building owner to claims involving:

The absence of a pre-work schedule of condition can create evidential difficulties. If damage appears after construction starts, the building owner may struggle to demonstrate the property’s previous condition.

Serving a notice retrospectively does not necessarily restore the statutory procedure for work already completed. Obtain specialist advice immediately if notifiable work has started without notice.

Party Wall Agreements for Common Projects

Loft conversions

A loft conversion often requires notice where steel beams bear into a party wall, the work raises or alters the wall, or the design affects a shared chimney.

Roof works alone do not automatically require notice. The structural details determine whether the Act applies.

Rear and side extensions

An extension may require a Section 1 notice for a new wall at the boundary and a Section 6 notice for foundations close to a neighbouring structure.

If the extension connects to or cuts into an existing party wall, a Party Structure Notice may also apply.

Basement excavations

Basements commonly trigger Section 6 and may involve underpinning or work to a party structure.

Surveyors will usually require detailed structural designs, temporary works information, sequencing, monitoring and robust method statements. An adjoining owner may also request security for expenses.

Chimney breast removal

Removing a chimney breast connected to a party wall normally involves cutting away a projection from the wall. This commonly requires a Party Structure Notice.

The building owner must also comply with structural and building regulation requirements.

Flats and maisonettes

Floors and partitions separating independently occupied parts of a building can qualify as party structures.

Leaseholders should also review their lease and obtain any required landlord consent. Compliance with the Party Wall Act does not replace leasehold consent.

Commercial development

The Act applies to commercial as well as residential property. Major projects may affect freeholders, occupational tenants and long leaseholders, creating multiple adjoining owners.

Early ownership research and coordinated notice strategy can prevent delays.

Is a Party Wall Agreement the Same as Planning Permission?

No. Planning permission, building regulations approval, listed building consent, freeholder consent and the Party Wall process perform different functions.

Planning permission controls the acceptability of development.

Building regulations address matters such as structural safety, fire safety and energy performance.

The Party Wall Act regulates specified work affecting adjoining owners and structures.

Receiving planning permission does not remove your Party Wall obligations. Equally, a Party Wall Award does not grant planning permission or building regulation approval.

Why Appoint Anstey Horne?

Anstey Horne has extensive experience advising building owners, adjoining owners, developers and property professionals on the Party Wall etc. Act 1996.

Our Chartered Surveyors work on projects ranging from residential extensions and loft conversions to complex basements and major commercial developments. We review notices, manage surveyor appointments, prepare schedules of condition, assess technical proposals and make Party Wall Awards.

Our team understands that Party Wall work requires more than procedural knowledge. Effective advice also depends on construction technology, structural risk, building pathology, access requirements and practical dispute resolution.

Early advice can help you identify affected owners, serve valid notices and address technical issues before they delay the construction programme.

Party Wall Agreement FAQs

Is a Party Wall agreement a legal requirement?

You must follow the Party Wall etc. Act 1996 before carrying out work covered by it. This usually means serving notice and obtaining either written consent or a Party Wall Award before starting.

Do I always need a Party Wall Award?

No. If the adjoining owner consents in writing to a valid notice, a statutory dispute does not arise and you do not need an Award.

Can I prepare a Party Wall agreement myself?

You can prepare and serve your own notice, but errors can invalidate the procedure. A building owner cannot act as the appointed surveyor because a surveyor must not be a party to the matter.

Can work start as soon as my neighbour consents?

Written consent resolves the Party Wall notice, but you must still comply with planning, building regulations, leasehold requirements and any other applicable consent. The notice period can be waived by agreement, but record this clearly in writing.

Can my neighbour stop my extension?

Your neighbour can seek an injunction if you start notifiable work without following the Act. They cannot normally use the Act to veto properly notified work that the legislation authorises.

Who pays for the Party Wall surveyor?

The building owner usually pays the reasonable surveyor costs because their work triggered the procedure. The surveyors can determine a different allocation where the circumstances justify it.

Do I need a Party Wall agreement for a loft conversion?

You will normally need to serve notice if the conversion involves cutting steel beams into a party wall, removing a connected chimney breast or altering the party structure. The design determines whether the Act applies.

Do I need a Party Wall agreement for a rear extension?

You may need notice if you build at the boundary, cut into an existing party wall or excavate below neighbouring foundations within the relevant distances.

Does a Party Wall agreement expire?

Notices generally cease to have effect if the work does not begin within 12 months. The Act does not give every Award a separate fixed expiry date, although Awards commonly regulate commencement and remain connected to the valid notice and authorised work.

What happens if my neighbour ignores the notice?

For Party Structure and Section 6 notices, a dispute is deemed to arise after 14 days without a response. You must then follow the surveyor appointment procedure.

Can I serve notice before receiving planning permission?

Yes, but the design must contain enough detail to support a valid and meaningful notice. If the planning process changes the work materially, you may need to serve a new notice or obtain a further Award.

Does a Party Wall agreement transfer when a property is sold?

A change of ownership can affect notices, appointments and the ability to exercise rights under the Act. Obtain advice before completing a sale or purchase while Party Wall procedures remain ongoing.

Can my neighbour claim for damage?

Yes. The building owner must make good damage caused by work carried out under the Act or compensate the adjoining owner where the statutory conditions apply. A schedule of condition helps establish whether the damage existed before the work.