What is a Party Wall Notice?
A party wall notice is a formal written document under the Party Wall etc. Act 1996. It’s used to notify your neighbour (known as the adjoining owner) that you’re planning to carry out certain types of building work that could affect their property. Your notice should include:
• Details of the proposed works.
• The property address.
• The start date.
• Any relevant drawings or supporting information.
All of this gives your neighbour the opportunity to understand the works and either consent or raise concerns. It’s not just a courtesy, or a nice thing to do. It’s a legal requirement in certain situations, and getting it right from the start can save a lot of time and stress later on.
When Do You Have to Serve a Party Wall Notice?
You must serve a notice if your works fall within one or more of the specific categories under the Act. The most common include:
Work directly to a party wall or structure: For example, cutting into the wall to inset steel beams, raising or lowering it, exposing it when removing a roof covering, or removing chimney breasts.
Building on or at the boundary line: This includes building a new wall up to or astride the boundary between properties.
Excavation near a neighbouring structure: If you’re digging within 3 meters or a neighbouring building, and deeper than their foundations, or within 6 metres for much deeper excavations.
If your project falls into any of these categories, you’re legally requir4ed to service notice before you start the work.
Do All Building Works Require a Party Wall Notice?
No. The good news is that not all building works require a party wall notice. For example:
• Internal works that don’t affect a party wall.
• Minor, non-structural repairs or maintenance.
• Works entirely within your own property, away from boundaries or shared structures.
Don’t typically fall under the Act. But it’s not always obvious. Even something that seems minor, like installing a steel beam or removing an internal chimney breast, can trigger the need for a notice. If you’re unsure about whether your works need one, it’s always worth checking with the surveyor before you start. It’s much easier to get it right beforehand than fix things later!
Types of Party Wall Notices
It might surprise you to know that there’s not just one type of party wall notice. There’s 3, and the one you need will depend on the work you’re doing.
Section 1 Notice: Line of Junction. This is used when you’re building a new wall at, or astride a boundary line.
Section 3 Notice: Party Structure Notice. Used when carrying out works directly to a shared wall or structure.
Section 6 Notice: Adjacent Excavation. For when excavating near a neighbouring building.
Each type has different notice periods, (typically 1 or 2 months), so it’s important to know what you’re serving and when it needs to be served. Timing is critical. Serving the wrong notice, serving at the wrong time or not including enough detail can invalidate the process and cause delays.
What Happens After a Notice is Served?
Once you’ve served a notice, your neighbour now has 3 options for what to do next:
• Consent to the works, which allows you to go ahead. Even if they consent, it’s good practice to formally document the condition of their property beforehand.
• Dissent and appoint a surveyor. This triggers the formal party wall process, weresurveyors prepare a party wall award that outlines how the work will be carried out.
• Do nothing. If there’s no response within 14 days, it’s treated as dissent, and surveyors will need to be appointed.
If a party wall is needed, it will include:
• Details of the works.
• Timings and access arrangements.
• Protection measures for the adjoining property.
• A schedule of condition.
This ensures that the works are carried out safely and fairly for both sides.
What if a Neighbour Disputes the Notice?
If your neighbour disputes the notice, it doesn’t mean your project can’t go ahead. It just means that there’s a formal process that needs to be followed. Here each party appoints a surveyor, or they agree on a single surveyor to work for both of you (known as the Agreed Surveyor) to prepare a party wall award. The surveyors act independently and impartially to:
• Assess the proposed works.
• Identify potential risks.
• Agree on how those risks will be managed.
Once complete, the award is legally binding and allows the works to proceed in a controlled and agreed way. So while a dispute might feel like a setback, it’s simply a mechanism to make sure both parties are protected.
Party wall notices can feel complicated or even a little scary, but they’re a key part of managing building work near neighbouring properties. Knowing when you need one (and getting it right first time) can save time, avoid disputes, and protect your project from costly delays. And if you’re planning works and aren’t sure if the Act applies, it’s always worth getting advice early. At Harrison Clarke, we help people at all stages of the process, from right at the start creating a notice, serving one or responding to one, so we are more than happy to help. We also offer a consultation service for both building owners and neighbours for just £100 including VAT, so we can act quickly when needed.
For more expert advice on surveying and property matters, check out our range of informative videos on our website or YouTube channel. Harrison Clarke Chartered Surveyors is here to guide you every step of the way!
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