Party Wall Agreement London
Need a Party Wall Agreement for a loft conversion, rear extension, basement excavation, chimney removal or structural works in London? Hourican Associates explain whether you need a Party Wall Notice, written neighbour consent, a Schedule of Condition Survey or a formal Party Wall Award.
Quick answer
A Party Wall Agreement is the common phrase homeowners use for the written consent or formal Award needed before notifiable works can proceed.
In many cases the correct process starts with serving the right Party Wall Notice on each adjoining owner.
What is a Party Wall Agreement?
A Party Wall Agreement is the phrase many homeowners use when they need formal neighbour consent or surveyor documentation before carrying out works on or near a shared wall, boundary or neighbouring foundations. In practice, the Party Wall etc. Act 1996 usually involves one of four outcomes: a valid Party Wall Notice, written consent, a Schedule of Condition Survey, or a formal Party Wall Award.
This page focuses on Party Wall Agreement advice in London, where terraced houses, semi-detached homes, flats, maisonettes, loft conversions, rear extensions, chimney removals and basement excavations commonly involve shared walls, party structures, boundary walls or nearby foundations.
If your neighbour consents in writing after receiving the correct notice, the matter may proceed without a formal Award. If your neighbour dissents, does not respond, or wants surveyor involvement, a Party Wall Surveyor or surveyors are appointed and the formal document is normally called a Party Wall Award. The Award sets out how notifiable works are to be carried out, what protections apply, how access is managed and how any damage or disagreement will be dealt with.
Important distinction
“Party Wall Agreement” is a common search phrase, but the legally relevant document is often either written consent to a Party Wall Notice or a surveyor-agreed Party Wall Award. Hourican Associates can confirm which route applies to your London project.
Party Wall Agreement: what homeowners need to know
Homeowners often search for a Party Wall Agreement when they are planning works and want to know whether they need neighbour permission, a notice, a surveyor or a formal document before building starts. The right route depends on the works, the property type, the adjoining owner response and whether the proposed works are covered by the Party Wall etc. Act 1996.
In simple terms, the process usually starts by identifying whether the works are notifiable. If they are, the correct notice is served on each adjoining owner. The adjoining owner can then consent, dissent and appoint their own surveyor, or dissent and agree to the appointment of one impartial Agreed Surveyor.
Party Wall Agreement, Notice or Award: what is the difference?
The phrase “Party Wall Agreement” is useful shorthand, but it can mean different things depending on how your neighbour responds. The table below explains the terms most homeowners come across.
| Term homeowners use | What it usually means | When it applies |
|---|---|---|
| Party Wall Agreement | A general phrase for neighbour consent or surveyor documentation. | Before notifiable works proceed on or near a shared wall, boundary or neighbouring foundations. |
| Party Wall Notice | The formal notice served on adjoining owners. | At the start of the Party Wall process where the Act applies. |
| Written consent | The adjoining owner agrees to the works after receiving a valid notice. | Where the neighbour is comfortable with the proposals and does not require a formal Award. |
| Party Wall Award | The formal surveyor-agreed document after dissent or no response. | Where the Act’s dispute procedure is triggered. |
When do you need a Party Wall Agreement in London?
You may need to follow the Party Wall process when your proposed works affect a shared structure, boundary line or neighbouring foundations. This is especially common in London because terraced houses, semi-detached homes, flats, maisonettes and closely spaced properties often share walls, floors, ceilings, garden walls or foundation zones.
- Loft conversions where steel beams, padstones or flashing are inserted into a party wall.
- Rear or side extensions built on, up to, or close to the boundary line.
- Basement works, underpinning or excavations below neighbouring foundation depth.
- Excavations within 3 metres or 6 metres of a neighbouring building or structure.
- Chimney breast removal or structural alterations affecting a party wall.
- Works to flats or maisonettes where floors, ceilings or separating walls may be party structures.
- Boundary wall works, including new walls built up to or astride the line of junction.
If you are unsure whether your project is notifiable, start with our when do I need a Party Wall Agreement guide or send your drawings to our team for advice.
How the Party Wall Agreement process works
Our role is to make the process clear, compliant and proportionate, whether you are the building owner planning works or the adjoining owner who has received notice. If you are asking how to get a Party Wall Agreement, the usual route is to review the works, serve the correct notices, record the neighbour’s response and then agree consent or an Award before the notifiable works begin.
1. Review of drawings and ownership
We review the proposed works, drawings, structural details and adjoining ownership position to identify which Party Wall Notices may be required.
2. Party Wall Notices served
We prepare and serve the correct notices, including Party Structure, Line of Junction and Section 6 excavation notices where applicable.
3. Neighbour response
The adjoining owner may consent, dissent and appoint their own surveyor, or dissent and agree to one impartial Agreed Surveyor.
4. Schedule of Condition
Where appropriate, we inspect and record the condition of the adjoining property before work begins, using written notes and photographic evidence.
5. Party Wall Award
If a dispute arises under the Act, the surveyor or surveyors agree an Award setting out the authorised works, safeguards, access and damage procedures.
6. Works proceed with clarity
Once the relevant consent, notice period or Award is in place, the notifiable works can proceed in accordance with the agreed framework.
What should a Party Wall Agreement or Award include?
A well-prepared Party Wall Award should be specific to the properties, the proposed works and the level of risk. It should not be a generic template that ignores the adjoining owner’s property or the builder’s method of work.
- Names and addresses of the building owner and adjoining owner.
- Details of the appointed surveyor or surveyors.
- The Party Wall Notices and the works they relate to.
- Architectural drawings, structural drawings and relevant method statements.
- A clear description of the notifiable works.
- Permitted access arrangements and working restrictions.
- Protection measures for the adjoining property.
- Procedures for reporting, inspecting and making good damage.
- A Schedule of Condition Survey where appropriate.
- Arrangements for further inspections during or after the works.
- Surveyor fees and reasonable cost responsibilities.
- Specific safeguards for basements, deep excavations or complex structural works.
For more detail on formal Awards, see our Party Wall Awards London service page, or see our guide to Party Wall Agreement examples.
Are you the Building Owner or Adjoining Owner?
The right advice depends on which side of the Party Wall process you are on.
| Building Owner | Adjoining Owner |
|---|---|
| You are planning building works that may fall under the Party Wall etc. Act 1996. | You have received a Party Wall Notice from your neighbour or are concerned about nearby works. |
| You may need to serve valid Party Wall Notices before starting notifiable works. | You can consent, dissent and appoint your own surveyor, or agree to use an Agreed Surveyor. |
| Drawings, structural information and excavation details may be required. | You should review the notice, drawings and potential risk before deciding how to respond. |
| If your neighbour dissents, the surveyor appointment and Award process usually follows. | Dissenting does not necessarily stop lawful works, but it activates the Act’s surveyor procedure. |
| View Building Owner Surveyor services. | View Adjoining Owner Surveyor services. |
London projects that commonly need a Party Wall Agreement
Party Wall matters often arise where space is tight, foundations are close together, or structural works affect shared walls. These are some of the most common project types we advise on across London.
Party Wall Agreement costs in London
The cost of a Party Wall Agreement depends on whether the matter is resolved by written neighbour consent or proceeds to a formal Party Wall Award. In London, costs are usually affected by the number of adjoining owners, the complexity of the works, whether a Schedule of Condition is needed, and whether one Agreed Surveyor or two surveyors are appointed.
We provide transparent quotations once we have reviewed the relevant project information. For a wider overview of surveyor fees, see our guide to Party Wall Surveyor costs in London.
Typical Hourican Associates fees
- Party Wall Notice Service: from £150 + VAT per adjoining owner.
- Schedule of Condition Surveys: typically £385–£585 + VAT depending on works and property size.
- Full Party Wall Award service: typically £1,100–£1,500 + VAT.
- Basement works: priced separately due to the more detailed survey process and higher level of risk assessment.
Fees depend on the property, project size, number of adjoining owners, documentation required and whether the matter proceeds by consent or Award.
Helpful Party Wall Agreement guides
These related guides explain common Party Wall Agreement questions in more detail and support the main London service page.
Why choose Hourican Associates?
Hourican Associates are a Chartered Building Consultancy specialising in Party Wall surveying across London. We help clients keep projects compliant, properly documented and neighbourly, while ensuring that both building owners and adjoining owners understand the process.
Party Wall Agreement advice across London
We provide Party Wall Agreement, Notice, Schedule of Condition and Award services across Greater London, including Central, North, South, East and West London.
Frequently Asked Questions
Not always. Homeowners often use “Party Wall Agreement” to describe the whole process. If an adjoining owner gives written consent, there may be an agreement without a formal Award. If they dissent or do not respond, surveyors are usually appointed and the formal document is called a Party Wall Award.
Many London loft conversions require Party Wall Notices, especially where steel beams, padstones or flashings are inserted into a party wall. If the adjoining owner dissents or does not respond, a Party Wall Award may be required before the notifiable works proceed.
The process normally starts by checking whether the proposed works are notifiable, serving the correct Party Wall Notice, waiting for the adjoining owner’s response, and appointing surveyor(s) if the adjoining owner dissents or does not respond.
A Party Wall Agreement may be needed where works affect a party wall, party structure, boundary line or involve excavation near and below neighbouring foundations. Common London examples include loft conversions, rear extensions, basement works and chimney breast removal.
The legal requirement is to comply with the Party Wall etc. Act 1996 where it applies. Homeowners often call this a Party Wall Agreement, but the formal route may involve a notice, written consent or a Party Wall Award.
A template may help you understand the process, but it may not be suitable for your specific property, adjoining owner details, notice type, drawings, ownership structure or project risk. Invalid notices can delay a project, so it is sensible to obtain professional advice before relying on a template.
A refusal, dissent or lack of response does not automatically stop lawful works. It normally means the dispute resolution process under the Party Wall etc. Act 1996 is triggered and a surveyor or surveyors are appointed to agree a Party Wall Award.
If notifiable works start without the correct Party Wall Notice, the position should be reviewed quickly. The works may need to be paused and regularised, and the adjoining owner may have remedies if the Act applies.
Timescales depend on the notice type, neighbour response, drawings, survey access and complexity of the works. A straightforward consent can be quick, while an Award involving two surveyors, inspections or complex works can take longer. Early notice reduces the risk of delaying your build programme.
In most typical residential building projects, the building owner carrying out the works pays the reasonable surveyor fees. There can be exceptions, especially where works are required because of defect, repair or where an adjoining owner requests additional works for their own benefit.
Yes. Both owners can appoint one impartial Agreed Surveyor. This can reduce duplication and keep the process proportionate where the works are suitable and both owners are comfortable with one surveyor acting under the Act.
No. A Schedule of Condition records the condition of the adjoining property before works begin. It is often included with, or referred to by, a Party Wall Award. It helps reduce disputes about whether damage was pre-existing or caused by the works.
Possibly. Planning permission and Party Wall procedures are separate. Planning approval or permitted development rights do not remove the need to comply with the Party Wall etc. Act 1996 where it applies.
If notifiable works have started without the correct notice, you should seek advice immediately. The situation may need to be paused and regularised. Adjoining owners may have remedies if works proceed without proper notice where the Act applies.
Yes, it can. The Act includes party structures, which may include floors, ceilings or other structures separating different parts of a building, such as flats or maisonettes. Leasehold licences and landlord consent may also be separate requirements.
Send Hourican Associates your drawings, structural information if available, site address and adjoining owner details. We will confirm whether the Act is likely to apply and provide a clear quotation for notices, surveys or Award work.