If you are planning building works in England and Wales, it is important to understand whether you need to serve a party wall notice. This is one of the most common legal requirements that arises when carrying out extensions, loft conversions, basement works, structural alterations, or excavations near neighbouring property.
A party wall notice is the formal written notice served under the Party Wall etc. Act 1996. It tells an affected neighbour, known as an adjoining owner, that certain works are proposed and gives them the opportunity to consent or dissent. If they dissent, or do not respond, the statutory party wall surveyor process begins.
In this guide, we explain what a party wall notice is, when it is required, who must be served, how it works, and what happens if you fail to serve one.
What Is a Party Wall Notice?
A party wall notice is a formal legal notice served by the building owner on the adjoining owner before carrying out certain works covered by the Party Wall etc. Act 1996.
Its purpose is to:
- notify the adjoining owner of the planned works
- explain the nature of those works
- state when the works are intended to begin
- trigger the statutory party wall procedure
A party wall notice is not simply a courtesy letter. It is the legal document that starts the party wall process and allows the Act to operate properly.
When Do You Need a Party Wall Notice?
You usually need a party wall notice when your proposed works fall into one or more of the three main statutory categories under the Act.
1. Works to an Existing Party Wall or Party Structure
A notice is commonly required where you intend to carry out structural works to an existing party wall, party structure, or party fence wall.
Typical examples include:
- cutting into a party wall to insert steel beams
- raising a party wall
- underpinning a party wall
- demolishing and rebuilding part of a party wall
- removing a chimney breast
- carrying out structural works to floors or ceilings between flats
This is one of the most common reasons building owners need to serve a party wall notice.
2. Building a New Wall at the Boundary
You may also need a notice if you are proposing to build a new wall:
- up to the boundary line
- or, in some cases, astride the boundary line
This commonly applies to:
- rear extensions
- side extensions
- wraparound extensions
- new masonry boundary walls
3. Excavating Near a Neighbouring Property
A party wall notice is also required where excavations are proposed close to neighbouring structures and to a depth lower than their foundations, within the statutory distances set out in the Act.
This often affects:
- extension foundations
- basement works
- underpinning
- pad foundations for structural alterations
In practice, adjacent excavation notices are one of the most common party wall triggers for domestic building works.
Why Is a Party Wall Notice Important?
A party wall notice is important because it protects both the building owner and the adjoining owner.
For the building owner, it creates the legal route to proceed with works under the Party Wall etc. Act 1996.
For the adjoining owner, it provides formal notice of the planned works and access to the statutory protections of the Act.
It also matters because, if the notice is not served correctly:
- the works may be delayed
- neighbour disputes may arise
- injunctions may be sought
- the building owner may lose the benefit of the statutory framework
- future property sales may be affected if paperwork is missing
A valid party wall notice is often the foundation of a smooth and legally compliant project.
Who Must Serve a Party Wall Notice?
The building owner is responsible for serving the notice.
This means the person carrying out the works must ensure that:
- the Act has been properly considered
- the correct notice type is used
- the correct adjoining owners are identified
- the notice is served in the correct way and within the required timeframe
Many owners assume their architect, contractor or planning consultant will automatically deal with this, but that is not always the case. Ultimately, responsibility rests with the building owner.
Who Must Receive a Party Wall Notice?
The notice must be served on every relevant adjoining owner.
This is an important point because there may be more than one owner to notify. Depending on the ownership structure, this could include:
- freeholders
- long leaseholders
- joint owners
- other parties with a qualifying ownership interest
This is one of the reasons why party wall matters can become technical. It is not always enough simply to notify the neighbour who lives next door.
What Types of Party Wall Notice Are There?
Different types of works require different types of party wall notice.
Section 1 Notice
A section 1 notice is generally used where a building owner intends to construct a new wall at the boundary line, or in some cases astride the boundary.
Section 2 Notice
A section 2 notice, often referred to as a party structure notice, is used where the building owner proposes to carry out works to an existing party wall or party structure.
Section 6 Notice
A section 6 notice relates to adjacent excavation and construction, where the proposed excavation falls within the statutory distance and depth rules.
Knowing which notice applies is essential, as the contents and timing requirements differ depending on the type of work.
How Much Notice Must Be Given Under the Party Wall Act?
The required notice period depends on the type of notice being served.
In general:
- section 1 notices require at least one month’s notice
- section 6 notices require at least one month’s notice
- section 2 notices require at least two months’ notice
The adjoining owner then generally has 14 days to respond.
This is why it is always advisable to deal with party wall notices early. Leaving matters too late can cause avoidable delay to the proposed start date.
What Must a Valid Party Wall Notice Include?
A valid party wall notice should clearly set out:
- the name and address of the building owner
- the address of the property where the works are proposed
- the nature and description of the works
- the intended start date
- any plans, drawings or sections required for that type of notice
- any other statutory information relevant to the works
For excavation notices in particular, drawings and sections are often required to show the location and depth of the proposed excavation and the intended structure.
If a notice is vague, incomplete or incorrectly drafted, it may be invalid.
How Do You Serve a Party Wall Notice?
A party wall notice can usually be served by:
- personal delivery
- post
- service at the relevant premises in accordance with the Act
- electronic communication, where the recipient has agreed to that method
In practice, it is sensible to keep evidence of service, such as proof of posting, email confirmation, or a written record of hand delivery.
A valid notice is not just about wording. Proper service also matters.
What Happens After a Party Wall Notice Is Served?
Once the adjoining owner receives the notice, they can:
- consent to the proposed works
- dissent to the proposed works
- fail to respond, which may lead to deemed dissent
If the adjoining owner consents, the works may proceed without the need for a formal party wall dispute process.
If they dissent, or do not respond, surveyors must be appointed and the matter moves forward under the statutory procedure.
What Happens If the Adjoining Owner Dissents?
A dissent does not mean the neighbour can stop the works.
This is one of the most common misunderstandings about the Party Wall etc. Act 1996.
A dissent simply means that a dispute is deemed to have arisen under the Act, and the matter must then be resolved by:
- an agreed surveyor, acting impartially for both owners
- or two separately appointed surveyors, one for each owner
The outcome of that process is usually the agreement of a party wall award.
What Is a Party Wall Award?
A party wall award is the legal document prepared by the surveyor or surveyors once a dispute arises.
The award will typically set out:
- the works that may proceed
- how the works are to be carried out
- what protective measures are required
- what access arrangements apply
- how damage is to be dealt with
- who is responsible for costs
The party wall award is one of the most important protections under the Act.
What Happens If You Do Not Serve a Party Wall Notice?
Failing to serve a party wall notice where one is required can lead to major problems.
Potential consequences include:
- delay to the works
- neighbour disputes
- legal action
- injunctions
- reliance on common law rather than the Act
- potential claims for damage or trespass
- issues when selling the property later on
In short, it is almost always far better to deal with the notice correctly at the outset than to try to resolve the issue after works have started.
How Early Should You Serve a Party Wall Notice?
The best time to serve a party wall notice is as soon as you are sufficiently clear about the works and the intended programme.
In practical terms, this is often once:
- the plans have been prepared
- planning permission has been granted, if required
- permitted development has been confirmed
- the project is likely to go ahead
Starting the party wall process early gives time for notice periods to expire and, if necessary, for surveyors to agree the award before the intended start date.
Why It Is Best to Use a Party Wall Surveyor
Although some owners consider serving their own party wall notice, it is usually better to have this done by an experienced party wall surveyor.
A surveyor can help by:
- confirming whether the Act applies
- identifying the correct adjoining owners
- drafting the correct notice
- ensuring the notice is valid
- serving it properly
- dealing with responses and next steps
This helps reduce the risk of invalid notice service, delay and unnecessary neighbourly tension.
Get Your Party Wall Notices in England and Wales
A party wall notice is a key legal step for many residential building projects in England and Wales. Whether you are proposing works to a shared wall, building up to the boundary, or excavating near a neighbouring structure, the Party Wall etc. Act 1996 may apply.
Serving the correct notice, on the right people, at the right time, is essential if you want the project to proceed smoothly and lawfully.
Handled properly, the party wall process protects both sides and helps avoid more serious problems later.
Need Help with a Party Wall Notice?
At Simple Survey, we assist building owners, adjoining owners, architects, contractors and engineers with party wall notices, party wall awards, and advice on the Party Wall etc. Act 1996.
Our party wall notice fees start from £35 plus VAT, and our party wall award fees start from £300 plus VAT, offering a cost-effective service without compromising on experience or professionalism.
If you need help with a party wall notice in England and Wales, email team@simplesurvey.co.uk and our team will be happy to assist.