Planning building work in London can move quickly once drawings are ready and a builder is available. However, one important step is often left until the last minute: checking whether the Party Wall etc. Act 1996 applies to the project.
If your work affects a shared wall, boundary line, or neighbouring foundations, you may need to serve a party wall notice before building work begins. Leaving this too late can delay your start date, create unnecessary tension with neighbours, and make the project more stressful than it needs to be.
This simple checklist explains what London homeowners should consider before confirming a builder or setting a start date.
1. Check Whether Your Work Is Close to a Neighbouring Property
Many London homes are built close together, especially terraced houses, semi-detached properties, converted flats and maisonettes. If your planned work is close to a neighbour’s wall, boundary, garden wall, extension, basement or foundations, it is sensible to check the party wall position early.
Party wall matters commonly arise during rear extensions, loft conversions, side-return extensions, chimney breast removals, basement projects, structural alterations and excavation works.
2. Do Not Assume Planning Permission Covers Party Wall Matters
Planning permission and party wall procedures are different. Even if your plans have been approved by the local council, you may still need to deal with party wall notices separately.
Planning permission looks at whether the development is acceptable from a planning point of view. The party wall process deals with how certain works may affect neighbouring owners and shared structures.
This is why homeowners should not wait until after planning approval to think about party wall requirements. The earlier you check, the easier it is to avoid delays.
3. Review the Type of Work You Are Carrying Out
The type of building work matters. A small internal refurbishment may not need a party wall notice, but structural work or excavation near a neighbour often needs a closer look.
Examples of work that may need party wall advice include:
- Cutting into a party wall for steel beams
- Removing a chimney breast from a shared wall
- Building a new wall at or near the boundary
- Excavating for new foundations near a neighbouring property
- Building a rear or side extension
- Carrying out basement works or underpinning
- Making structural openings close to a shared wall
4. Identify the Adjoining Owners Early
Before notices can be served, you need to know who should receive them. In many cases this is straightforward, but London properties can be more complicated, especially where flats, leaseholds, freeholds, management companies or multiple adjoining owners are involved.
If there is more than one affected adjoining owner, each may need to be considered separately. Missing an owner can cause problems later, so it is worth checking this properly before the project timeline is fixed.
5. Allow Enough Time Before the Builder Starts
Party wall notices are not something to leave until the week before work begins. Depending on the type of work, notice periods may apply before the work can start.
If a neighbour consents, the process may be straightforward. If they dissent or do not respond, surveyors may need to be appointed and a Party Wall Award may be required before notifiable work can proceed.
For this reason, homeowners should deal with party wall matters before booking a firm start date with the builder.
6. Speak to Your Neighbour Before Formal Notices Are Served
A friendly conversation can make the party wall process smoother. Letting your neighbour know what you are planning, when the works may happen and how disruption will be managed can reduce concern.
This does not replace the formal notice process where a notice is required, but it can help avoid misunderstandings. Many disputes begin because neighbours feel surprised or excluded from the process.
7. Consider a Schedule of Condition
A Schedule of Condition records the condition of the adjoining property before work starts. It usually includes written notes and photographs of relevant areas.
This can be useful where works are close to a neighbouring property, particularly for excavation, structural work, basement projects, loft conversions and extensions. If damage is alleged later, the record can help both sides understand whether the issue was pre-existing or related to the works.
8. Understand the Difference Between Consent and Dissent
When an adjoining owner receives a party wall notice, they may consent, dissent, or fail to respond. Consent usually means the work can proceed under the notice, although good practice and careful construction still matter.
If the adjoining owner dissents or does not respond within the required period, the matter usually moves to surveyor appointment and a Party Wall Award. This does not necessarily stop the project, but it does mean the correct process must be followed.
9. Do Not Start Notifiable Work Too Early
Starting work before the party wall process is handled correctly can create avoidable risk. It may lead to neighbour complaints, legal issues, site delays or disputes about damage.
Before work begins, make sure you understand whether notices are required, whether the adjoining owner has responded, and whether an award is needed.
10. Get Advice Before the Project Timeline Becomes Tight
The best time to get party wall advice is before the project becomes urgent. If you already have drawings, structural calculations or a builder’s scope of work, a party wall surveyor can usually review the project and explain what may be required.
This gives you more control over timing, neighbour communication and the overall process.
London Party Wall Checklist Before Booking a Builder
- Check whether your work affects a shared wall, boundary or nearby foundations
- Confirm whether the Party Wall etc. Act 1996 may apply
- Identify the adjoining owner or owners
- Allow time for notices before works begin
- Speak to your neighbour early where possible
- Consider whether a Schedule of Condition is sensible
- Do not assume planning permission removes party wall duties
- Get advice before confirming a fixed builder start date
Need Party Wall Advice Before Building Work Starts?
Express Party Wall helps homeowners, landlords, developers and adjoining owners across London with Party Wall Notices, Schedules of Condition and Party Wall Awards.
Whether you are planning a loft conversion, rear extension, basement project, chimney breast removal or structural alteration, we can review your project and explain the next step clearly.
For wider support, visit our Party Wall Surveyor London page. You can also read more about Party Wall Notices for Extensions, Party Wall Awards in London and our party wall pricing.
If you are ready to check your project, request a quote and send us your plans or a short description of the proposed works.