The Act establishes clear distance thresholds triggering notice requirements. If you intend to excavate within 3 metres of an adjoining structure and your proposed foundations are to a lower depth than your neighbour’s existing foundations, you must serve an adjacent excavation notice.

For piled foundations, the threshold extends to 6 metres. Piling operations can transmit vibrations and ground movements over larger areas than conventional excavations, hence the increased distance.

These measurements are taken from the nearest point of your neighbour’s structure to the edge of your proposed excavation. “Structure” includes their main building, outbuildings, boundary walls with foundations – any constructed element that could be affected by your groundworks.

We measure these distances carefully for every project. Getting the assessment wrong and failing to serve required notices can halt your project entirely once discovered. It’s not worth the risk – proper professional assessment at the start prevents expensive complications later.

The 3-metre measurement applies to conventional excavations – dig holes, foundation trenches, drainage excavations etc.. If any part of your excavation comes within 3 metres of your neighbour’s structure, notice becomes mandatory.

The 6-metre rule covers deep excavations such as basement excavations or piled foundations – driven piles, bored piles, continuous flight auger piles, and other piling techniques. If your piling equipment or the piles themselves operate within 6 metres of neighbouring structures, you must serve notices.

London’s dense development patterns mean these thresholds apply to countless projects. Victorian terraces sit immediately adjacent to each other. Modern developments often butt right up to boundaries. Basement excavations frequently trigger both the 3-metre rule (for the excavation itself) and sometimes party structure requirements if you’re also affecting shared walls.

Our extensive London experience across Westminster, Kensington & Chelsea, Camden, and other central boroughs means we understand these challenges intimately.

Before we dive into notice requirements, let’s clarify what party structures actually are. They include:

Party walls between properties – the most common example is the dividing wall between terraced or semi-detached houses. These walls stand on the boundary line, shared equally between neighbouring properties.

Party floors in flats – the floor separating flats in converted buildings or purpose-built blocks counts as a party structure. Different rules apply compared to party walls, but the notice requirements are similar.

Shared structural elements – any wall, floor, or structural element that separates buildings belonging to different owners and forms part of both buildings falls within the Act’s scope.

We’ve handled party structure matters across every type of London property imaginable – Victorian terraces, Edwardian conversions, modern developments, commercial buildings, and everything in between. Our extensive London experience means we understand the particular challenges each building type presents.

Party structure notices are required for a specific list of works. Understanding these categories helps you identify when professional guidance becomes essential.

Underpinning or raising party walls. Whether you’re addressing subsidence through underpinning or adding height to create additional storeys, these works fundamentally alter the party structure. We manage complex underpinning projects regularly, particularly across South London where ground conditions can be challenging.

Repairing party walls where work is necessary due to defect. Normal maintenance might not require notice, but substantial repairs addressing structural defects certainly do. The distinction isn’t always clear-cut, which is why early professional advice proves valuable.

Demolishing and rebuilding party walls. This represents the most comprehensive intervention in party structures. Full demolition and reconstruction affects both properties significantly and requires careful management through detailed party wall awards.

Cutting into party walls. Common examples include inserting steel beams for open-plan layouts, installing damp-proof coursing, or adding flashing for weatherproofing. Even relatively minor intrusions into the party structure trigger notice requirements. We’ve processed thousands of these notices for architects and developers across the UK.

Cutting away from party walls. Removing chimney breasts projecting from party walls is the classic example. What seems like simple removal work actually affects the shared structure and requires proper notification.

Line of junction notices are required when you intend to build either astride the boundary (meaning the wall will be partly on your land and partly on your neighbour’s land) or immediately on to the boundary but wholly on your own land.

The “line of junction” is simply the boundary line between your property and your neighbour’s. If your proposed wall touches or straddles this line, you’ll need to serve a line of junction notice.

We see these situations constantly in our practice:

Extending your property where the new wall touches the boundary. Side extensions are classic examples. If your extension wall runs along or across the boundary with your neighbour’s garden, formal notice becomes mandatory. We’ve processed thousands of these notices across London boroughs and beyond.

Building a new garden wall. Constructing a boundary wall where none currently exists requires a line of junction notice. Important note: the Act specifically excludes fences. Only walls trigger these requirements. If you’re unsure whether your structure counts as a wall or fence, give us a call – we’re happy to clarify.

Here’s what matters for your project planning: you must serve the notice at least one calendar month before commencing any works. Not one month before you’d like to finish – one month before the first spade goes in the ground or the first brick gets laid.

This is a genuine calendar month (30 or 31 days depending on the month), not a fixed 30-day period. We always recommend our clients serve notices well ahead of this minimum period to allow for any complications.

Once served, your neighbour has precisely 14 days to respond. They can consent to your proposals or dissent from them. This 14-day window is strict – we track these deadlines carefully for all our clients.

The Party Wall etc. Act 1996 provides a clear framework for property owners who need to carry out certain types of work. It’s designed to prevent disputes whilst allowing you to exercise your legitimate rights to develop your property. Think of it as a sensible set of rules that protects everyone involved.

The Act covers three principal types of work that we see every day in our practice:

Building new walls on or astride the junction line with another property. This is your boundary line – where your land meets your neighbour’s. Whether you’re building a garden wall or extending your property right up to the boundary, specific notice requirements apply. We help hundreds of clients each year navigate these requirements efficiently.

Carrying out works directly to a party structure or wall. This includes inserting steel beams, adding flashing, underpinning, or making any structural alterations to shared walls. These works affect both properties, which is why the Act requires proper notification and often professional oversight. Our team ensures these works proceed smoothly whilst protecting all parties.

Adjacent excavation close to adjoining buildings or structures. If you’re digging within 3 metres of your neighbour’s building or structure (or 6 metres for piled foundations), you’ll need to serve notices. London’s dense urban environment means this applies to countless basement and foundation projects we manage across the capital and beyond.

Let’s clarify the terminology, because understanding who’s who matters.

The Building Owner is you if you’re carrying out the works. You’re the person “desirous of exercising the rights under the Act” – essentially, you want to build something that triggers party wall procedures. Whether you’re a homeowner planning an extension or a developer managing a major project, our Building Owner services provide comprehensive support from start to finish.

The Adjoining Owner is your neighbour – anyone whose property might be affected by your works. They have rights under the Act, including the right to receive proper notice, appoint their own surveyor, and have their property protected. If you’ve received a party wall notice, our Adjoining Owner services ensure your interests are properly protected.

Why Notices Matter

Whenever works are notifiable under the Act, you as the Building Owner must serve written notices on all affected adjoining owners. This isn’t optional – it’s a legal requirement, and we make sure it’s done correctly the first time.

Here’s what happens: if an adjoining owner doesn’t agree with anything in your notice or requires an additional layer of protection, a dispute arises. Don’t worry – “dispute” in party wall terms doesn’t necessarily mean conflict. It’s simply the formal mechanism that requires party wall surveyors to step in and prepare a party wall award.

This is where our expertise makes all the difference. We’ve handled thousands of party wall matters, and our solution-focused approach means disputes are resolved efficiently and professionally, maintaining good neighbourly relations wherever possible.

At Akt. Neighbourly Surveyors, we offer transparent pricing through two primary models:

Hourly Rate Basis: Typically ranging from £150–£250 per hour depending on surveyor experience and project complexity, with an estimated time allocation provided upfront.

Fixed Fee Proposals: For standard residential works, fixed fees typically range from £1,050–£1,650 per adjoining owner for straightforward matters, increasing to £2,000–£2,500+ for more complex projects involving basements, structural alterations, or multiple adjoining owners.

We can act as an Agreed Surveyor, serving both the Building Owner (who is undertaking the works) and the Adjoining Owner in a completely impartial capacity. This approach offers significant cost efficiency, as there is only one surveyor’s fee, payable by the Building Owner. For residential projects, we provide a clear quotation either fixed fee or hourly rate with projected hours before engagement, ensuring cost certainty and preventing fee escalation.