What the Act is for
Party walls are shared structures: each owner usually owns their half, and the Act treats the wall as a whole. Without the Act, cutting into or raising a wall you half own could be a trespass against your neighbour. The Act resolves that by giving the building owner statutory rights, and the adjoining owner statutory protection, through a notice-and-dispute procedure. It is designed to prevent disputes and, where they arise, settle them quickly without going to court.
The key sections at a glance
| Section | What it does | Notice |
|---|---|---|
| s.1 | New walls on the line of junction (the boundary), either astride it with consent or wholly on your land | 1 month |
| s.2 | Rights of the building owner over existing party walls and structures: raising, underpinning, cutting in, cutting away projections, flashings and more | Via s.3 |
| s.3 | The party structure notice needed before any s.2 work | 2 months |
| s.4 | Counter notices: the adjoining owner can ask for extra works for their benefit | Within 1 month |
| s.5 | No consent within 14 days means a dispute is deemed to arise | 14 days |
| s.6 | Excavation within 3 m or 6 m of a neighbouring building or structure | 1 month |
| s.7 | No unnecessary inconvenience; compensation for loss or damage; protection when premises are laid open; works to follow agreed plans | – |
| s.8 | Rights of entry to the neighbour’s land to carry out notified work | 14 days |
| s.10 | Resolution of disputes by surveyors and the Award; appeal | – |
| s.11 | Who pays for the work itself; payment in lieu of making good | – |
| s.12 | Security for expenses | – |
| s.15 | How notices are served, including by email where agreed | – |
| s.16 | Offence of refusing or obstructing lawful entry | – |
| s.20 | Definitions: party wall, party structure, owner, special foundations | – |
Key definitions (section 20)
- Party wall has two meanings. First, a wall that forms part of a building and stands on the land of different owners (beyond just its footings), such as the shared wall between a pair of semis. Second, the part of a wall on one owner’s land that separates buildings belonging to different owners, such as where your neighbour’s extension has been built against your wall.
- Party fence wall: a masonry wall, not part of a building, standing astride the boundary and separating two gardens. Timber fences are not party fence walls.
- Party structure: a party wall, and also a floor or other structure separating parts of a building approached by separate staircases or entrances, such as the floor between two flats.
- Owner: includes a freeholder, a leaseholder with a lease of more than a year, and a purchaser under contract.
- Special foundations: foundations using an assemblage of beams or rods to distribute load, which in practice means reinforced concrete. They cannot be placed on a neighbour’s land without written consent (s.7(4)).
Section 2 rights in more detail
Section 2(2) lists the building owner’s rights, lettered (a) to (n). The ones that come up most in domestic work are: (a) underpin, thicken or raise a party structure; (b) repair or rebuild a defective party structure; (e) demolish and rebuild a party structure that is not strong enough or high enough for the intended building; (f) cut into a party structure for any purpose, including inserting a damp-proof course or a beam bearing; (g) cut away footings or projecting chimney breasts, jambs or flues; (j) cut into the neighbour’s wall to insert flashings; and (n) expose a party wall previously enclosed, subject to adequate weathering. Many of these come with built-in obligations to make good damage (s.2(3)–(6)). Our section 2 guide covers all of them.
The protections for neighbours
- Advance notice, with details of the work.
- Work must not cause unnecessary inconvenience (s.7(1)).
- The building owner must compensate for any loss or damage resulting from the work (s.7(2)), and the adjoining owner can ask for a payment instead of the builder making good (s.11(8)).
- Where the work lays open the neighbour’s property, the building owner must provide hoarding, shoring or temporary protection (s.7(3)).
- The work must follow the agreed or awarded plans, with no deviation unless agreed or determined (s.7(5)).
- Security can be required before work starts (s.12).
How disputes are settled (section 10)
If the neighbour dissents, or is deemed to dissent, the owners either concur in appointing one Agreed Surveyor (s.10(1)(a)) or each appoint a surveyor, and those two select a third surveyor (s.10(1)(b)). Appointments must be in writing and cannot be rescinded (s.10(2)). If a party will not appoint, the other can appoint for them after a 10-day request (s.10(4)). The Agreed Surveyor, or any two of the three, settle the dispute by Award (s.10(10)); the third surveyor is called on only if the two cannot agree (s.10(11)). The Award may determine the right to do the work, the time and manner of doing it, and costs (s.10(12)). It is conclusive unless appealed to the county court within 14 days of service (s.10(16)–(17)).
Surveyors appointed under the Act are not advocates. Even a surveyor appointed by one owner has a statutory role to settle the dispute fairly between both.
Worked example: three neighbours, three notices
Illustrative only. Tom owns a mid-terrace house and plans a rear extension and a loft. The loft steels bear on both party walls (s.2, two months’ notice to both neighbours). The extension’s foundations are within 3 m of the left-hand neighbour’s back addition and deeper than its foundations (s.6, one month), and its new flank wall is built up to the boundary (s.1, one month). The house behind is more than 6 m from the dig, so it is not an adjoining owner for s.6. Tom serves combined notices to both neighbours two months ahead. One consents with a Schedule; the other dissents and appoints their own surveyor, so the two surveyors select a third and agree an Award between them.
What the Act does not do
- It does not change who owns a wall or where the boundary is, and surveyors cannot decide boundary disputes.
- It does not replace planning permission or Building Regulations.
- It does not let a neighbour veto work the building owner is entitled to do.
- It does not apply in Scotland or Northern Ireland.
Sources and further reading
- Party Wall etc. Act 1996, section 1: New building on line of junction (legislation.gov.uk)
- Party Wall etc. Act 1996, section 2: Repair etc. of party wall: rights of owner (legislation.gov.uk)
- Party Wall etc. Act 1996, section 3: Party structure notices (legislation.gov.uk)
- Party Wall etc. Act 1996, section 4: Counter notices (legislation.gov.uk)
- Party Wall etc. Act 1996, section 5: Disputes arising under sections 3 and 4 (legislation.gov.uk)
- Party Wall etc. Act 1996, section 6: Adjacent excavation and construction (legislation.gov.uk)
- Party Wall etc. Act 1996, section 7: Compensation etc. (legislation.gov.uk)
- Party Wall etc. Act 1996, section 8: Rights of entry (legislation.gov.uk)
- Party Wall etc. Act 1996, section 10: Resolution of disputes (legislation.gov.uk)
- Party Wall etc. Act 1996, section 11: Expenses (legislation.gov.uk)
- Party Wall etc. Act 1996, section 12: Security for expenses (legislation.gov.uk)
- Party Wall etc. Act 1996, section 15: Service of notices etc. (legislation.gov.uk)
- Party Wall etc. Act 1996, section 16: Offences (legislation.gov.uk)
- Party Wall etc. Act 1996, section 20: Interpretation (legislation.gov.uk)
- GOV.UK: The Party Wall etc. Act 1996 explanatory booklet
- GOV.UK: Party walls and building work
- Faculty of Party Wall Surveyors (FPWS)
Section references are to the Party Wall etc. Act 1996 as it applies in England and Wales, checked against legislation.gov.uk. This guide is general professional guidance, not legal advice; every project should be assessed on its own drawings.
- Party wall notices for building owners
- Fixed fees: party wall agreement cost
- Do I need a party wall agreement? (1-minute check)
Areas we cover include Party Wall Agreement Essex · Party Wall Agreement Kent · Party Wall Agreement Hertfordshire and more.
Sources: Party Wall etc. Act 1996 (legislation.gov.uk) · The Party Wall etc. Act 1996: explanatory booklet (GOV.UK) · Faculty of Party Wall Surveyors (FPWS). Last reviewed 27 October 2026. General guidance on the law in England and Wales, not legal advice.