Seven common questions about party wall issues

Chimney houses in London against cloudy sky.

The UK capital has a population of about 9 million people and many areas of high-density development, which makes party wall issues in London a common concern. At Squarepoint Chartered Surveyors, we have a wealth of experience working with residential and commercial property clients to provide expert advice, produce Schedules of Condition and draw up Party Wall Awards, so that alterations affecting party structures can be conducted harmoniously and the interests of all concerned are protected.

Here are some of the most frequently asked questions we come across, both during and after the Notice has been served in accordance with the Party Wall etc. Act 1996. If you have a question about party walls that isn’t answered below, please feel free to get in touch.

When does the Party Wall Act apply?

The Party Wall etc. Act 1996 broadly covers three types of work:

  • Making alterations to a party wall or other shared structure;
  • Conducting building work along the boundary line between two properties; and
  • Excavating within a certain distance of shared party structures on the adjoining property.

Typical examples of building work where the Party Wall Act applies would include cutting into the walls of a terraced house to install roof supports for a loft conversion, building an extension too close to the boundary, or excavating near a neighbouring structure to place foundations for a conservatory.

How do I make a party wall application?

If your building work falls within the remit of the Party Wall Act, you must serve Notice to the affected neighbours at least 2 months before work begins. Once you have obtained an agreement, work can begin.

The Party Wall Act sets out exactly what information must be contained in the Party Wall Notice and how to draft and serve it properly, in accordance with the law. Crucially, your Notice must be in writing. In order to get a party wall agreement, the Notice must be served by the building owners or their party wall surveyor.

There are several types of party wall applications you may need, depending on the proposed building works. These are:

  • Section 1 Notice – where you wish to build on the boundary line
  • Section 4 Notice – where you wish to work on an existing party wall
  • Section 6 Notice – where you wish to excavate within 3m of the boundary and deeper than the adjoining building’s foundations

A Party Wall Notice must give enough details and description of the proposed work to enable your neighbours to understand what exactly you wish to do and how this may affect their building. Every notice must also:

  • Include the full address, names and signatures of the building owners
  • Include the date of the Notice, which should be the date of posting or hand delivery
  • Be served on all affected neighbours (adjoining owners), which could be freehold owners, leasehold owners, tenants and other occupants

Many party wall surveyors also consider it prudent to include drawings to explain the proposed work. Section 6 Notices require mandatory plans and sections showing the site and depth of excavation including, where relevant, any plans to underpin or otherwise strengthen the foundations of the adjoining building.

Why do I need a party wall surveyor?

As the building owner planning to carry out works that fall within party wall legislation, there are several stages at which you will require professional assistance. Initially, a surveyor will help you ensure that your Party Wall Notice is written and served correctly, and in accordance with the specified legal process.

Next, your surveyor will draw up a Schedule of Condition on any areas of the adjoining property that are likely to be affected by your proposed works. The purpose of this is to make sure that any damage that might occur is appropriately attributed and that neither party is wrongly held responsible for damages.

Finally, a surveyor will be required to negotiate the agreement between you and your adjoining owner(s), also known as a Party Wall Award. This outlines the details of your proposed building project, including the working hours, access arrangements and any required safeguards needed to protect property or people over the course of the works.

What does a Party Wall Agreement cover?

A party wall agreement usually includes:

  • The Party Wall award stipulates the guidelines governing how the work should progress
  • A Schedule of Condition for the adjoining property, possibly including photographs
  • Drawings and details of the proposed works
  • Both addresses
  • Details of the contractor’s public liability insurance
  • Surveyors’ details and access arrangements, and neighbours’ surveyor’s fees
  • Indemnity covered by the building owner in favour of the adjoining owner
  • The time limit for commencement of work (usually 1 year) and working hours

The Party Wall Act is an important piece of legislation that is designed to pre-empt any construction-related disagreements between neighbours, with a clear legal framework for managing any disputes that do arise and protect the interests of both the building owner and the adjoining owner(s).

What can I do if my neighbour has started building without informing me?

If your neighbour’s building project affects the party wall between your properties – be it the wall of your home, an outbuilding on the boundary or just your garden wall – they must have your consent before going ahead with the build. Consent needs to be obtained formally, by serving you with a Party Wall Notice. You can read more about how to respond to notices here.

In the event that you have not been served with the legally required Notice, your neighbour is acting illegally, and you are within your rights to stop the building. To do so, you will need to apply for an injunction from the County Court. That said, if you make a wrongful claim (knowingly or unknowingly), you will be liable for any costs incurred. For this reason, we would always recommend that you seek professional advice from an experienced Party Wall surveyor before applying for an injunction.

I started building works before realising that I needed to serve Notice – what do I do?

If your construction work falls within the remit of the Party Wall Act and you have not sought consent from your adjoining neighbour(s) before starting the build, you are acting outside of the law and must stop work immediately.

We would urge you to hire a surveyor, if you have not already done so, and follow their advice to serve Notice as soon as possible. An experienced Party Wall surveyor will follow the proper procedure and guide you through the legally required procedure to ensure that your build is fully compliant.

Do my neighbours have the right access to my property during their build?

If you are the adjoining owner, you are required to provide access to your neighbour, their contractors or their surveyor if the work cannot reasonably be completed via any other entrance. Should access via your property be required, an appropriate amount of notice must be given – 14 days are usually considered acceptable, but this can be proportionately reduced to deal with an emergency.

Squarepoint Chartered Surveyor is a specialist party wall surveyor in London and would be happy to answer any questions or queries you may have. If you or your neighbour are planning alterations that will affect a party wall or boundary and are covered under party wall legislation, please give us a call at 0207 651 0000 or send us a message to see how we can help.

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Really helpful team at Squarepoint, on hand to help with any queries and take you through the whole process clearly and at a pace guided by you. Our party wall surveyor, Adam, was great at communicating and efficient throughout  the whole process, could not ask for more.

I had been hunting for a simple job that required a surveyor’s expertise, but had been struggling to find trust throughout my enquiries, until I spoke to Adam.

The advice simply and honestly given by Adam on our first call was remarkable. His friendly but competent application and manner made it easy for me to hire him, and not only did he more than deliver on the required services, but his price was the most competitive I could find. Would highly recommend Eve and Adam at Squarepoint.”


I recently hired Adam to help with a party wall award required on both sides of my terraced house.

He was able to liaise with both parties to answer their initial questions/concerns, which led to them both appointing him as the agreed surveyor, which saved me time and money.

Adam prepared the final award comprehensively and quickly. I would thoroughly recommend him and his friendly Admin assistant Eve.

From the very first time I called Scott, he was very attentive to my requirements for a building survey. From the outset he noted down my areas of concern, updated me with progress prior to the survey and gave me a thorough debrief after the survey. The quality of his report was excellent, very easy to understand and, importantly, comprehensive.

I was extremely pleased with the excellent service provided by Scott Buchanan of Squarepoint Chartered Surveyors, and  I hope to contact yourselves in due course with a view to getting further advice.

Working with Adam Graham at Squarepoint was a very smooth and easy process. He was always clear and thorough in our communication and provided very detailed advice. I would highly recommend Squarepoint!”

The team at Squarepoint were very helpful, knowledgeable and understanding when dealing with my loft conversion and party wall agreement.”

We have used Squarepoint Chartered Surveyors at several of our Parishes and have found them to be very efficient in the production of reports on a variety of issues such as building condition surveys and PPM, defect investigations and Party Wall matters.”

Young, trustworthy, professionally competent and committed to delivering on time and on budget.”

Fast and friendly service with an extremely thorough survey. The Surveyor’s phone call to explain the findings of the report, before the official survey was sent, was invaluable.

I used Squarepoint for a party wall agreement. From my initial conversation with Eve through to Adam completing the party wall award, the process was smooth, professional and timely given the challenges of COVID lockdown. Thank you for your great service.