The Party Wall Act

In the UK, the Party Wall Act 1996 is a vital piece of legislation that helps manage the relationship between property owners when construction or renovation work affects shared walls, boundaries, or structures. Understanding the Party Wall Act is crucial to ensuring that projects proceed smoothly and without unnecessary legal complications. This Act helps prevent disputes by clearly defining the rights and responsibilities of property owners, setting out a framework for resolving conflicts that may arise.

Whether you’re planning to build an extension, undertake structural alterations, or carry out any work close to a neighbouring property, the Party Wall Act outlines the necessary steps to take, which helps protect all parties involved and fosters good neighbourly relations.

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01 Party Wall Extensions
A party wall is a shared wall or structure that separates two properties.

What is a Party Wall?

A party wall is a shared wall or structure that separates two properties.

Type A Party Wall

 

A Wall Built on the Boundary Line

This is a wall that stands on the line dividing two properties. Both property owners share ownership and responsibility for this wall. 

 

A Wall Shared by Adjoining Properties 

This includes walls that are situated along the boundary and are used by both properties, like walls that divide terraced houses or semi-detached homes. 

Examples could include common walls in terraced houses, or structural walls that support the structure of the building and are shared between two properties.

02 Type A Party Walls

Type B Party Wall

 

A Wall That Belongs to One Property but Is Used by Another

For example, if a wall is built entirely within one property but is used by a neighbour, it might be considered a party wall if it forms part of the boundary.

A point to note with a Type B party wall is that it may not have been built as a party wall originally. It can be a wall that is built up to the boundary line, which later becomes enclosed by a neighbouring extension or garage and therefore becomes a party wall. 

It is worth noting in type A and type B cases, it is only the part of the wall that does the separating that is a party wall, with any wall above or to the side not being a party wall.

03 Type B Party Walls

A Party Fence Wall

A party fence wall is not part of the building, and usually stands astride the boundary line between the land of two different owners. The party fence wall does not form part of the building or structure but instead extends from it. Examples include a garden wall. 

Wooden fences or fences with concrete posts are not considered to be party fence walls, only masonry walls are. 

 

A Party Structure 

This refers to a party wall or floor structure separating two buildings that are approached solely by separate staircases or entrances. This would relate mostly to flat ownership type properties and will not be covered any further in this particular post.  

 

Walls that are not Party Walls

A wall that is not a party wall may include boundary walls, like a fence wall or a garden wall built wholly on one owner’s land. Or, an external wall built up to but not astride the boundary.

04 Party Fence Walls

What is the Party Wall Act?

The Party Wall Act 1996 is a UK law designed to address the rights and responsibilities of property owners when work affects shared walls, boundaries, or structures. Its primary goal is to prevent and resolve disputes between neighbours that arise due to construction or renovation work, ensuring that such activities proceed smoothly and with minimal conflict.

One of the key objectives of the act is to protect adjoining owners. The Act provides a framework to protect neighbours from potential damage or disruption caused by construction work. It ensures that those carrying out the work follow proper procedures and take necessary precautions.

It establishes a clear process for notifying adjoining owners about intended works, and sets out procedures for resolving any disputes that may arise.

The Act outlines the rights of property owners to carry out work on their own property, as well as their obligations towards neighbours who might be affected.

When Does the Party Wall Act Apply?

The Party Wall Act applies to specific types of work that impact party walls or boundaries. 

 

Building on or Near the Boundary

If you plan to build a new structure on or close to the boundary line between your property and a neighbour’s, the Act requires you to notify the adjoining owner. This includes situations where the new building extends over the boundary or affects the foundation of the existing property.

 

Work on a Party Wall or Structure

If you’re carrying out work on a wall that is shared with a neighbouring property, such as altering or repairing it, you must adhere to the Act. This includes changes to the structure or function of the party wall.

 

Excavation Near a Neighbour’s Property

If your excavation work extends close to a neighbouring property (usually within 3 to 6 metres, depending on the depth), the Act requires you to inform the adjoining owner. This is to ensure that the work does not undermine the neighbour’s property or lead to structural issues.

Notice must be given on excavations within 3 metres of an adjoining owner, if the lowest point of excavation will be lower than the underside of the footings to the party wall. Notice must also be given for any new building structure within 6 metres of any part of the neighbours building if any part of the work will meet a line drawn downwards at 45 degrees in the direction of the excavation from the bottom of the neighbours foundation.

The Party Wall Act_02

Underpinning

If you are underpinning (strengthening) your foundations in a way that could affect a neighbouring property’s party wall, you must notify them under the Act.

 

Building a New Party Wall

If you are constructing a new party wall that will be shared with a neighbour, the Act requires that both parties agree on the work and any associated costs.

 

Exclusions from the Act

The Act does not typically apply to internal works that do not affect party walls or boundaries.

Routine maintenance or minor repairs that do not affect the structure or function of a party wall are generally excluded.

Key Requirements of the Party Wall Act

The Party Wall Act 1996 outlines several key requirements that property owners must follow to ensure compliance and prevent disputes. 

 

Serving Notice

Before starting any work that falls under the scope of the Act, you must serve a written notice to all adjoining owners. This notice informs them of the proposed work and provides them with the opportunity to raise any concerns or objections.

The notice must be served at least two months before the start of the proposed work. This gives the adjoining owners sufficient time to consider the impact of the work and respond appropriately.

 

Adjoining Owners’ Rights

Adjoining owners have the right to object to the proposed work if they believe it will adversely affect their property. They can issue a counter-notice if they disagree with the plans or if they have concerns about potential damage or disruption.

If the work requires access to the adjoining owner’s property (e.g., for scaffolding or inspection), you must obtain their permission. The Act provides a mechanism for resolving disputes about access if the adjoining owner refuses to grant it.

 

Appointment of Surveyors

If the adjoining owners and the property owner cannot reach an agreement about the work, they must appoint a surveyor to resolve the dispute. In some cases, the parties may agree to use a single surveyor (known as the “agreed surveyor”) to represent both sides.

If the parties cannot agree on a single surveyor, each party can appoint their own surveyor. These surveyors work together to agree on an award (a formal document that outlines the terms and conditions of the work).

Party Wall Award

The award is a document produced by the surveyor(s) that sets out the agreed terms of the work, including any conditions to protect the adjoining owner’s property. It may include provisions for how any damage will be repaired and how the work will be carried out.

The award is legally binding on both parties once it is issued. If either party fails to comply with the award, the other party may seek legal remedies.

 

Work Execution and Dispute Resolution

The work must be carried out in accordance with the terms of the award. Failure to do so may result in disputes and potential legal action.

If disputes arise during the execution of the work, the surveyor(s) may be called upon to resolve these issues based on the terms of the award and the Act.

The Party Wall Act_03

Types of Notices

The Party Wall Act requires different types of notices depending on the nature of the proposed work. Below we share a breakdown of the types of notices and when to use them.

 

Party Structure Notice

This notice is used when you are planning to work on a shared wall or structure. It is applicable if you are repairing, altering, or demolishing a party wall, or if you are building new structures that will affect an existing party wall.

The notice should describe the proposed work in detail, including how it will affect the party wall and any structural implications.

 

Line of Junction Notice

This notice is required if you plan to build on or near the boundary line between two properties. It applies to situations where the new building or structure will be erected along the boundary or encroach on the neighbour’s land.

The notice should detail the proposed construction work, including its position relative to the boundary line.

 

Notice of Adjacent Excavation

This notice is necessary if you are excavating close to a neighbouring property. The Act requires this notice to protect the adjoining property from potential damage due to the excavation work.

The notice should specify the depth and extent of the excavation, as well as the measures being taken to protect the neighbouring property.

 

Party Wall Agreement

This is not a notice per se but rather an agreement that follows the notice period if the adjoining owner consents to the work. This agreement should be in writing and detail the terms of the work, any agreed modifications, and arrangements for mitigating potential impacts.

Examples of Work to Party Walls and Extensions

Work to party walls when carrying out an extension project can come in many different arrangements and forms.

Below we show some different configurations in plan that you may come across when working on an extension project.

05 Party Wall Extension Types 01
06 Party Wall Extension Types 02
Below you can see some examples of how you could detail these important party wall junctions.
07 EPW01 Existing solid masonry party wall to new boundary wall - Plan 3D
06 Party Wall Extension Types 02
Our recent set of details on the Detail Library demonstrates a selection of different masonry cavity wall junctions with existing walls and new party walls. The set includes examples of different foundation scenarios.
09 Sep24 EPW01-11 Masonry Party Walls

Common Issues and Disputes Under the Party Wall Act

Even with a clear understanding of the Party Wall Act and adherence to its procedures, disputes and issues can still arise. Below we share an overview of common problems and how to address them.

 

Disagreements Over Proposed Work

Disputes often occur when adjoining owners do not agree on the scope or impact of the proposed work. For example, an adjoining owner might object to the scale of an extension or the method of construction if they believe it will negatively impact their property.

Clear, detailed notices and comprehensive plans can help mitigate these issues. If disagreements arise, detailed discussions and negotiations can often resolve them. Engaging a surveyor early can help mediate and clarify the scope of work.

 

Damage to Adjoining Property

Adjoining owners may claim that pre-existing damage is worsened by the construction work. This is a common concern, particularly if the work involves significant structural changes or excavation.

There can also be disputes over new damage directly caused by the construction activities, such as cracks in walls or subsidence.

Before work begins, a schedule of condition (a detailed record of the adjoining property’s condition) should be prepared. This document can be used to assess any damage caused during the construction. Regular inspections and maintaining communication with the adjoining owner can help address concerns promptly.

 

Access to Adjoining Property

Access to the adjoining owner’s property may be required for scaffolding, materials, or inspections. Disputes can arise if the adjoining owner is unwilling to grant access or if there are disagreements about the terms of access.

The Party Wall Act provides a mechanism for resolving access issues. If an agreement cannot be reached, surveyors can mediate to establish reasonable access terms. It’s important to plan access requirements well in advance and negotiate access terms clearly in the Party Wall Award.

 

Objections to the Work

Adjoining owners might object to the work if they feel the notice was improperly served or if they were not given adequate time to respond.

Adjoining owners might issue dissent notices if they believe the work will affect their property adversely. The reasons for dissent can vary from concerns about noise and disruption to structural impacts.

Ensure that all notices are correctly prepared and served. Address any objections by discussing them directly with the adjoining owner or through surveyors. Modifying the work or adding conditions to mitigate concerns can help resolve objections.

The Party Wall Act_04

Surveyor Disputes

Disagreements can occur over the appointment of surveyors, especially if one party feels that the chosen surveyor is biased.

There can be disputes over the terms of the award issued by the surveyors, particularly if one party believes the conditions are unfair or inadequate.

If disputes arise with surveyors, it may be necessary to appoint additional surveyors or seek a resolution through the surveyor’s professional body. Clear communication and documented agreements can help manage expectations and avoid conflicts.

 

Compensation Issues

Adjoining owners may seek compensation for inconvenience or damage caused by the construction work. Disputes can arise over the amount or terms of compensation.

Compensation claims should be addressed according to the terms set out in the Party Wall Award. Ensure that any compensation agreed upon is documented clearly and adhered to. If disputes over compensation arise, they can often be resolved through negotiation or additional mediation by surveyors.

 

Non-Compliance with the Award

Disputes can occur if either party fails to follow the terms of the Party Wall Award, such as not adhering to conditions for protecting the adjoining property or not completing agreed-upon works.

Address non-compliance issues promptly by reviewing the award terms and seeking resolution through the surveyors. If necessary, legal action can be taken to enforce compliance with the award.

Conclusion

The Party Wall Act and associated work and notices carried out as part of the Act are complex and vary project by project. There can often be the need to carefully and sensitively negotiate arrangements with the neighbouring property to ensure the best outcome for all.

The design and detailing of works to or adjacent to party walls is equally challenging. Our most recent set of construction details on the library looks at various party wall situations when building an extension close to, or along the boundary line. You can see the details below.

09 Sep24 EPW01-11 Masonry Party Walls

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34 Party Wall Act

Author

Written by Emma Walshaw, Architectural Technologist. Emma is the founder of First In Architecture and the Detail Library. She has written a number of books on construction and detailing.
 

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