If you are planning a rear extension, side return extension, kitchen extension or wraparound extension, you may need to serve a Party Wall Notice before building work starts. This is especially common in London, where many homes are terraced, semi-detached, converted into flats or built close to neighbouring properties.
Express Party Wall helps homeowners understand whether the Party Wall etc. Act 1996 applies to their extension project. We can review your drawings, prepare the correct notices, manage neighbour responses and help with Schedule of Condition reports or Party Wall Awards where required.
Planning an extension in the capital? Our Party Wall Surveyor in London service can help with notices, neighbour responses and Awards.
You may need a Party Wall Notice for an extension if the work affects a shared wall, boundary line or nearby foundations.
This can apply if your extension involves excavation close to your neighbour’s property, building a new wall on or near the boundary, cutting into a shared wall, or carrying out structural work that may affect an adjoining owner.
Even if your extension has planning permission or falls under permitted development, Party Wall requirements may still apply. Planning approval and Party Wall matters are separate.
If you are unsure how the process works, read our guide to a Party Wall Agreement in London.
Rear extensions often require Party Wall Notices because new foundations may be close to neighbouring foundations. This is common with terraced and semi-detached homes where properties are built close together.
If the excavation is within the relevant distance of a neighbouring structure, you may need to serve notice before starting work. The notice gives your neighbour formal information about the proposed works and allows them to consent or dissent.
Starting this process early helps avoid delays once your builder is ready to begin.
If your neighbour dissents or does not reply, you may need a Party Wall Award in London before work starts.
Side return extensions are common in London, especially on Victorian and Edwardian terraced homes. These projects often involve work close to the boundary line and excavation near a neighbour’s property.
Depending on the design, you may need a Party Wall Notice for excavation, boundary works or work affecting a shared structure.
Because side return projects can be close to neighbouring walls, fences, drainage and foundations, it is important to check the Party Wall position before construction starts.
A kitchen extension may need a Party Wall Notice if it includes foundations close to a neighbouring property, structural steelwork, boundary wall work or changes near a shared wall.
Many homeowners assume a kitchen extension is simple because it is at the rear of the property, but Party Wall requirements can still apply if the work affects nearby structures or boundaries.
A short review of your drawings can usually confirm whether notices are needed.
For current notice, Schedule of Condition and Award fees, visit our Party Wall Surveyor Pricing page.
The type of notice depends on the work being carried out.
For extensions, the most common notices relate to excavation near neighbouring foundations, building on or near the boundary line, and work affecting an existing party wall.
Some projects may require more than one notice. For example, a rear extension may involve excavation close to a neighbour’s foundations and a new wall built near the boundary.
Serving the correct notice is important because an incorrect notice can cause delays or disputes later.
Once the Party Wall Notice is served, your neighbour can respond in different ways.
They may consent in writing, which usually allows the project to move forward without a Party Wall Award. They may dissent and agree to use one Agreed Surveyor. They may dissent and appoint their own surveyor. Or they may not respond, which is treated as a dispute under the Party Wall etc. Act 1996.
If there is dissent or no response, a Party Wall Award may be required before the notifiable works can begin.
If your neighbour consents to the notice in writing, a Party Wall Award is usually not required.
However, it may still be sensible to arrange a Schedule of Condition before work starts. This records the condition of the adjoining property and can help prevent disagreement if damage is alleged later.
Consent does not remove your responsibility to carry out the works carefully and in line with the law.
If your neighbour dissents, this does not usually mean your extension cannot go ahead. It means the formal Party Wall surveyor process begins.
Both owners may agree to appoint one impartial Agreed Surveyor, or each owner may appoint their own surveyor. The surveyor or surveyors then prepare a Party Wall Award.
The Award sets out how the works should be carried out, access arrangements, working hours, protection measures and what happens if damage occurs.
The cost depends on the type of extension, how many adjoining owners are affected, and whether your neighbour consents or dissents.
Some extension projects only need Party Wall Notices. Others may require a Schedule of Condition or Party Wall Award.
For current fees, visit the Party Wall Surveyor Pricing page:
https://www.expresspartywall.com/pricing/
Express Party Wall helps London homeowners deal with Party Wall matters before extension work begins.
We can review your drawings, confirm whether notices are needed, prepare and serve the correct Party Wall Notices, explain neighbour responses, arrange Schedule of Condition reports and handle Party Wall Awards where required.
Our aim is to make the process clear, practical and properly documented, so your extension can move forward without unnecessary delay.
Express Party Wall supports homeowners across London with Party Wall Notices for rear extensions, side return extensions, kitchen extensions and wraparound extensions.
We help with projects across North London, South London, East London, West London, South East London and South West London.
Popular areas include Brixton, Lewisham, Greenwich, Ealing, Westminster, Kensington, Chelsea, Hammersmith, Fulham, Richmond, Barnet, Hackney, Bromley, Croydon and nearby London locations.
Planning an extension and unsure whether a Party Wall Notice is needed? Express Party Wall can check your plans and guide you through the correct process before work starts.
Send us your drawings, property address and a short description of the extension. We will explain whether the Party Wall etc. Act 1996 applies and what the next step should be.
Ready to check your extension? Get a Party Wall Quote from Express Party Wall today.
You may need a Party Wall Notice if your rear extension involves excavation close to a neighbouring property, work near the boundary line, or changes affecting a shared structure.
Side return extensions often need Party Wall Notices because they are commonly built close to the boundary and may involve excavation near neighbouring foundations.
Yes, you may still need one. Planning permission and Party Wall requirements are separate. Having planning approval does not remove your Party Wall responsibilities.
If your neighbour consents in writing, a Party Wall Award is usually not needed. A Schedule of Condition may still be useful before work starts.
If your neighbour dissents, the surveyor process begins. A Party Wall Award may be prepared to allow the notifiable works to proceed in a controlled way.
A neighbour’s dissent does not usually stop the work. It means the Party Wall process must be followed before the notifiable works begin.
It is best to start as soon as your drawings are ready. Leaving it too late can delay your builder’s start date.
In most standard homeowner projects, the building owner carrying out the extension pays the reasonable Party Wall surveyor fees.
Yes. If both owners agree, one impartial Agreed Surveyor can act for both sides and prepare the Party Wall Award.
Yes. Express Party Wall can review your drawings and confirm whether Party Wall Notices are likely to be required before work starts.
