As an associate surveyor at Oxford Surveyor, party wall work is one of my specialisms. Every week I hear from homeowners in Oxford who are surprised to learn that their planned extension or loft conversion has triggered legal obligations under the Party Wall etc. Act 1996. This guide will explain the Act in plain English and tell you exactly what you need to do.
What Is the Party Wall Act?
The Party Wall etc. Act 1996 is a piece of legislation that provides a framework for preventing and resolving disputes in relation to party walls, party structures, and excavations near neighbouring buildings. It applies across England and Wales and covers three types of work:
- Section 1: Building a new wall at or astride the boundary with a neighbouring property
- Section 2: Carrying out work to an existing party wall or party structure (this includes most work to shared walls between terraced or semi-detached houses)
- Section 6: Excavating within 3 metres of a neighbouring building to a depth greater than their foundations, or within 6 metres if your excavation is deeper than a line drawn at 45° from the base of the neighbour's foundation
Does the Party Wall Act Apply to My Project?
It probably does if you're planning any of the following in Oxford or Oxfordshire:
- A rear or side extension that involves building on or near the shared boundary
- A loft conversion involving work to cut into or support from a shared gable wall
- A basement conversion
- Removing a chimney breast that forms part of a shared chimney stack
- Underpinning foundations or excavating near a shared boundary
If you're not sure, the safest course is to ask a party wall surveyor before starting work.
What Do You Need to Do?
If the Act applies to your project, you must serve formal notice on your neighbour(s) before starting work. The notice period is two months for most party wall work (one month for new boundary walls). Your neighbour then has 14 days to respond. They can either:
- Consent: Work can proceed as planned (though a Schedule of Condition is still recommended)
- Dissent: The Act requires the appointment of a party wall surveyor (or surveyors) to draw up a party wall award
- Not respond: After 14 days without response, they are deemed to have dissented, and a surveyor must be appointed
What Is a Party Wall Award?
A Party Wall Award (also called an Agreement) is a document prepared by the surveyor(s) that sets out exactly what work may be carried out, when and how it can be done, access arrangements, and what measures must be taken to protect the neighbouring property. It also records the condition of the adjoining property before work starts — this is the Schedule of Condition — so that any claims for damage can be properly assessed.
"The most important thing I tell clients is: serve the notice early. Many projects are delayed because the party wall process wasn't started until work was already underway — or worse, had already started without any notice at all."
— Sarah Mitchell, Associate Surveyor, Oxford Surveyor
The Agreed Surveyor Approach
Where both you and your neighbour agree, one surveyor can be appointed to act for both parties. This is called the "agreed surveyor" approach. It's faster, simpler and significantly cheaper than each party appointing their own surveyor. At Oxford Surveyor, we regularly act as agreed surveyor for both parties — saving time and keeping costs down for everyone involved.
What Are the Costs?
Party wall surveyor fees vary depending on the complexity of the project and the number of adjoining owners. As a general guide:
- Simple agreed surveyor appointment (both parties): from £600–£900
- Two surveyors appointed (each party has their own): combined fees of £1,200–£2,000+
- Third surveyor determination (a formal dispute): additional fees apply
In most cases, the building owner (the person carrying out the work) is responsible for the costs. If your neighbour appoints their own surveyor unreasonably, the costs can be significant — which is why the agreed surveyor approach, where possible, is usually the better option.
What Happens If You Don't Serve Notice?
Proceeding without proper party wall notice is a mistake I see homeowners make — and it can be an expensive one. Your neighbour can apply to the courts for an injunction stopping work. You may become liable for any damage caused. You may not be able to sell the property without retrospective party wall documentation. In short: don't skip this step.
Our Party Wall Service
At Oxford Surveyor, Sarah Mitchell handles all party wall matters. We offer:
- Advice on whether the Act applies to your project
- Party wall notices served on your behalf
- Schedule of condition surveys for adjoining properties
- Party wall awards prepared and agreed
- Acting as agreed surveyor for both parties
- Post-construction sign-off inspections
We cover Oxford and all of Oxfordshire. Contact us to discuss your project — we'll tell you whether the Act applies and what you need to do.
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