If you share a wall, floor, ceiling, or certain boundary walls with a neighbour, some building works are regulated by the Party Wall etc. Act 1996. The Act is designed to enable development while protecting adjoining owners and occupiers, by requiring advance written notice and providing a structured route to resolve matters if agreement isn’t reached.
The principle is simple: if the Act applies, you must follow the statutory process before works begin. Skipping the process can lead to delay, disputes, and avoidable legal risk.
What is a “party wall”?
A party wall is a wall used by more than one owner. The most obvious example is the dividing wall between two houses.
The Act also recognises related shared elements, including:
- party structures (for example, floors between flats), and
- certain masonry boundary walls that sit astride the boundary (often called “party fence walls”).
(Timber fences are not treated the same way.)
What buildings are covered?
The Act is not limited to houses. It can apply to all types of buildings—residential, commercial, and industrial—so long as there is a relevant shared wall/structure or the excavation/boundary criteria are met.
What types of work are covered?
Most works of a structural nature can be caught by the Act, including:
Works to an existing shared wall or shared structure
Typical examples include:
- structural repairs to a shared wall
- underpinning or raising a shared wall
- removing a chimney breast where the shared wall is affected
- cutting into a shared wall to insert structural supports (for example for loft works)
Excavation close to a neighbour’s building
Excavations can be notifiable where they are close enough and deep enough to be relevant to a neighbour’s foundations—often where digging for foundations to support new walls or structural supports.
Certain shared boundary wall works
Demolishing and rebuilding, or altering, a masonry boundary wall that qualifies as a party fence wall can be notifiable.
Which “owners” are involved?
Party wall procedure often involves more people than expected. The Act affects:
- the Building Owner (the owner proposing the works), and
- the Adjoining Owner(s) (owners and certain occupiers who may be affected).
There can be several owners to consider in one property—for example freeholders and long leaseholders. Identifying the correct owners is essential, because mis-served notices are a common cause of delay.
What should you do if your work is within the Act’s remit?
If your proposed work is likely to be notifiable, you should:
- Give written notice to all relevant adjoining owners (and any other parties who must be notified).
- Ensure the notice clearly identifies all building owners proposing the work.
- Describe the work plainly so the recipient can understand what is proposed (plans and details help).
- Serve notice in the correct timescales.
As a general guide:
- Works involving party walls or party structures typically require two months’ notice.
- Certain excavations and some boundary wall situations typically require one month’s notice.
What happens after notice is served?
Once notice is served, the adjoining owner generally has 14 days to reply. If they agree, that agreement should be in writing.
If they do not agree—or if they do not respond—then a statutory dispute is treated as having arisen for procedural purposes.
Adjoining owners may also serve a counter notice requesting additional works for their own benefit (usually at their own cost where they are the beneficiary).
What happens if a dispute arises?
If a dispute route applies, owners must either:
- appoint one Agreed Surveyor to act impartially for both owners, or
- each appoint their own surveyor, in which case those surveyors select a Third Surveyor as a safeguard (used only if needed).
The Act defines “surveyor” broadly (anyone other than the owners themselves), but in practice it is sensible to appoint someone with strong construction knowledge and proven experience of party wall procedure.
What is the Party Wall Award?
Where surveyors are required, the matter is concluded by an Award. An Award is a legally binding document that regulates the way the works are carried out and deals with related incidental matters such as procedure, responsibilities, and costs.
A properly drafted Award is there to facilitate progress and protect both sides—without becoming a needless obstacle.
The practical warning that saves most trouble
If you do not comply with the Act—by serving the required notices and obtaining the necessary written position through the correct route—your works can be delayed, challenged, and become far more expensive than they needed to be.
The best approach is always:
- check early,
- serve correctly,
- plan realistically, and
- keep communication calm and professional.
Get Cost Saving Pro Advice Now
If you want to know whether your planned works fall within the Party Wall etc. Act 1996—or you need notices and the formal process handled properly—contact Simple Survey. We keep party wall matters clear, proportionate, and moving, and we aim to be the UK’s cheapest party wall surveyors without compromising professional standards.