If you are planning building works close to a neighbour—or you have received a notice from next door—the Party Wall etc. Act 1996 sets out a clear process that must be followed in England and Wales. The Act provides a framework for preventing and resolving disputes connected to party walls, boundary walls and excavation near neighbouring buildings.
The practical aim is simple: lawful works can proceed, but neighbours must be properly notified and given the opportunity to respond. Where there is no written consent, the Act provides a structured way to conclude matters.
What the Act covers
Most notifiable projects fall into one (or more) of these three categories:
- Works to an existing party wall or shared structure
- New building at or astride the boundary line
- Excavation within 3 or 6 metres of a neighbouring building or structure (depending on depth and proximity)
What is a “party wall” and what counts as shared?
The Act recognises two common party wall types:
- A wall standing astride the boundary of land belonging to two (or more) owners. This can include a masonry boundary wall (often called a “party fence wall”), but not timber fences.
- A wall standing wholly on one owner’s land but used by two (or more) owners to separate their buildings (only the separating part is “party”).
The Act also uses the term “party structure”, which can include walls or floors/partitions separating parts of buildings in different ownership (for example, flats).
Works that are usually too minor to notify
Not every job triggers party wall procedure. Minor works—such as putting up shelves, chasing for recessed wiring/sockets, or replastering—are generally too small to require notice. The key question is whether the work affects a shared structure in a way the Act regulates, or involves notifiable excavation/boundary works.
Who must be notified?
A common reason party wall matters go wrong is serving notice on the wrong person—or missing an owner entirely. There may be more than one relevant owner (for example, freeholder and long leaseholder). Correct owner identification is fundamental to a valid process.
Party Wall Notices: what a valid notice should contain
There is no single official notice form, but notices must include core information such as:
- the building owner’s name and address (all joint owners should be named)
- the address of the building where work is proposed
- a clear description of the works
- the proposed start date (not before the notice period has expired)
For works to an existing party wall, the notice period is commonly at least two months, and notices are generally treated as valid for up to one year to commence the works (subject to the Act’s requirements and proper procedure).
After notice is served: consent, dissent, or silence
Once a notice is served, the adjoining owner may:
- consent in writing, or
- dissent in writing, or
- do nothing.
Silence is not a safe middle ground. If nothing is done within the statutory period (commonly 14 days for many notices), a dispute is treated as having arisen for procedural purposes and the matter moves into the surveyor appointment procedure.
The Act also allows for a counter-notice in certain circumstances, requesting additional or modified work (typically where the adjoining owner benefits).
What happens if agreement cannot be reached?
If agreement cannot be reached, owners either:
- appoint a single Agreed Surveyor, or
- each appoint their own surveyor, and the two surveyors select a Third Surveyor as the statutory backstop (used only if needed).
Although the Act defines “surveyor” broadly (essentially someone not a party to the matter), competence matters. In practice, you want someone experienced in party wall procedure and able to progress matters efficiently and impartially.
Boundary works: building up to or astride the line
If you propose building astride the boundary line, there is no right to do so without the neighbour’s written agreement. Where agreement is not given within the response period, the wall must be built wholly on your own land.
The Act also deals with footings and foundations near the boundary. In some circumstances, footings may extend beneath neighbouring land, but reinforced concrete placement beneath neighbouring land is not something a building owner should assume is permitted without express written consent.
Excavations: the 3m / 6m rules in plain English
Excavations are commonly notifiable where:
- you excavate within 3 metres and deeper than the neighbour’s foundations, or
- you excavate within 6 metres and the excavation would intersect a line drawn at 45 degrees from the bottom of the neighbour’s foundations.
Excavation notices should clearly explain what is proposed and are commonly accompanied by drawings/sections to show location and depth.
Access onto neighbouring land
Where necessary for works carried out under the Act, adjoining owners/occupiers must allow access for those works, typically during usual working hours. In normal situations, advance notice is required (commonly 14 days). The Act also contains provisions dealing with obstruction of lawful access.
In practice, access is often best controlled by setting out clear parameters: where access is needed, when, for how long, what protections will be used, and how areas will be left afterwards.
If you received a notice—or if no notice was served
If you receive a notice: reply in writing within the response period. Even if you have concerns, responding keeps you in control of the next steps.
If your neighbour starts notifiable work without serving notice: you should seek professional advice promptly. In serious cases, it may be possible to seek a court injunction or other legal remedies, but that is a legal route and requires proper advice before proceeding.
Who pays and what about appeals?
In many typical domestic situations, it is usual for the Building Owner to pay the reasonable costs associated with concluding party wall matters where the works are solely for their benefit.
Awards can be appealed in the county court within a strict timeframe (commonly discussed as 14 days from service). Appeals focus on legal validity and proper exercise of powers—not simply dissatisfaction.
Get Cost Saving Pro Advice Now
If you want the party wall process handled properly from the outset—clear notices, correct owners served, calm handling of responses, and practical progression where formal steps are required—contact Simple Survey. We keep matters professional, proportionate, and cost-controlled, and we aim to be the UK’s cheapest party wall surveyors without compromising standards.