If you are an Adjoining Owner dealing with party wall works in London, LENIO explains your rights and options under the Party Wall etc. Act 1996 and manages the process on your behalf, protecting your property, usually at the Building Owner's expense. Every matter is handled personally by a Chartered Civil and Building Engineer (ICE and CABE).
If your neighbour has sent you a Party Wall Notice, you are the Adjoining Owner under the Party Wall etc. Act 1996. This term simply means the owner of a property that may be affected by a neighbour’s proposed building works.
You do not need to take immediate action. However, your response to the notice, or your decision not to respond, has formal consequences under the Act. Understanding your position as an Adjoining Owner before you reply is the right first step.
“Owner” has a specific meaning. It covers a freeholder, a leaseholder with more than a year remaining, or someone under contract to buy. In a block of flats that can mean the notice is served on both a leaseholder and the freeholder, so more than one person may need to respond.
This trips up almost everyone. Under the Party Wall Act, to dissent does not mean you disagree with your neighbour’s project. It simply means you would like a Party Wall Award prepared before works begin, so that the conditions protecting your property are set out formally.
You cannot use the party wall process to stop the works themselves. If you object to the project on its own merits, for example its size or its impact on light, that is a matter for your local planning authority, not the Party Wall Act. The two are entirely separate.
So dissenting is not a hostile act, and it is not a personal disagreement with your neighbour. It is a procedural step that puts proper protections in place. Many Adjoining Owners dissent precisely so that they end up with a written, agreed record of how the works will be carried out.
Not every notice is correctly prepared. Before responding, check that the notice meets the basic requirements of the Party Wall etc. Act 1996.
If any of these details are missing or incorrect, the notice may be invalid. We can review the notice you have received and confirm whether it meets the legal requirements before you decide how to respond.
Once you receive a Party Wall Notice, you have 14 days to respond. The Act gives you four possible responses. Each leads to a different next stage in the adjoining owner party wall process.
You agree to the proposed works in writing. The party wall process moves forward without the need for surveyor appointments. Works may proceed, though a Schedule of Condition is still advisable to protect your property.
You require your own additional works to the party wall, carried out at the same time for your benefit, such as building it higher or chasing in for services. It must be served within one month, and you meet the cost of the works that benefit you.
You ask for a Party Wall Award before works begin. This does not stop the works and is not an objection to the project. It triggers the statutory route and surveyors are appointed to prepare the Award.
If you do not respond within 14 days, a dispute is treated as having arisen. This is deemed dissent. It removes your control, because the process continues without your say. See the box below.
As a general rule, the Building Owner covers the reasonable costs of the party wall process, including the Adjoining Owner’s surveyor fees. In most cases, you can appoint an Adjoining Owner’s Surveyor without paying for it yourself. You did not ask for these works, so you should not have to pay to have your property protected from them.
The exact amount depends on the complexity of the works and the number of properties involved. LENIO provides a clear written confirmation of the fee position before accepting any appointment. There are no surprises.
Alongside the response you choose, the Act builds in a set of protections for your property. These are the ones that matter most in practice.
The Act can give your neighbour a right to enter your land to carry out the works, but only where it is necessary and with the required notice, normally 14 days. The Party Wall Award sets out exactly when and how any access happens, so it is controlled rather than open-ended.
If the works damage your property, the Building Owner is responsible for putting it right, or for a payment in lieu so you can arrange your own repairs. The Schedule of Condition, taken before works begin, is the record used to decide what is attributable to the works.
Where the works carry real risk to your property, such as a basement excavation, you may be able to request that money is set aside as security before works begin, so funds exist to put right any damage. We advise whether this is appropriate for your situation.
In defined circumstances the Act provides for compensation for loss or damage caused by the works. Your surveyor ensures any such provision is reflected properly in the Award and pursued if the situation arises.
Speak directly with a party wall surveyor in London. In one short call, we review your notice, explain your rights as an Adjoining Owner and tell you exactly what to do next.
Call LENIO for Free AdviceAs your party wall surveyor for adjoining owners, LENIO protects your property and your rights throughout the full adjoining owner party wall process.
We review the Party Wall Notice you have received and confirm whether it is valid and correctly served. If it is defective, we advise on the right course of action before you respond.
We explain what the proposed works mean for your property and set out your response options clearly. You understand your adjoining owner rights before you make any formal response to the notice.
Where you dissent or are deemed to have dissented, we accept formal appointment as your Adjoining Owner’s Surveyor. We represent your interests throughout the surveyor appointment process and during Party Wall Award preparation.
Before works begin, we carry out a Schedule of Condition survey of your property. This creates a detailed written and photographic record of its condition, protecting you if damage is alleged later.
We review the draft Party Wall Award to ensure it properly protects your interests. This includes checking the scope of works, access arrangements, protective measures and the conditions governing how works proceed.
During the works, we remain available to advise on compliance with the Party Wall Award. We respond to any concerns about construction and inspect any reported damage against the Schedule of Condition record.
As an Adjoining Owner, your property and your neighbour relationship are both affected. An inadequately prepared Party Wall Award can leave your property without proper protection during construction. For this reason, having your own party wall surveyor for adjoining owners is the most practical approach.
In London, adjoining owner party wall matters arise on most renovation projects. The city’s dense housing stock means that shared walls, tight boundaries and close-proximity excavations are the norm. You have the right to representation and you do not have to manage this alone.
LENIO is led by a Chartered Civil Engineer and Member of the Institution of Civil Engineers (ICE), and a Chartered Building Engineer and Member of the Chartered Association of Building Engineers (CABE). A chartered surveyor leads every instruction personally, across London. See the GOV.UK explanatory booklet for the official guidance, or read about the full party wall process.
LENIO acts as party wall surveyor for adjoining owners across London, backed by two chartered professional memberships.
The Institution of Civil Engineers (ICE)
The Chartered Association of Building Engineers (CABE)Send us the Party Wall Notice you have received, or a short description of the works next door. We will review it and explain exactly where you stand, with no obligation.
You are not legally required to respond. However, if you do not reply within 14 days, the Act treats this as a dispute having arisen automatically. This is known as deemed dissent.
A further request is then served giving you 10 days to appoint a surveyor, and if you still do not, the Building Owner can appoint one on your behalf. Responding clearly gives you control over your position, so it is always worth replying within 14 days, even if only to say you are taking advice.
No, and this is one of the most common misunderstandings. To dissent under the Party Wall Act simply means you would like a Party Wall Award prepared before works begin. It is a procedural step, not a personal objection.
You cannot use the party wall process to stop the works. If you object to the project itself, for example its scale or its effect on light, that is a matter for your local planning authority, which is entirely separate from the Party Wall Act.
A valid Party Wall Notice must include the Building Owner’s name and address, the address of the property where works are planned, a clear description of the proposed works and the intended start date. It must state that it is served under the Party Wall etc. Act 1996.
If any details are missing or incorrect, the notice may be invalid. We can review the notice you have received and advise on whether it meets the legal requirements before you respond.
No. The Party Wall etc. Act 1996 is designed to allow certain works to proceed, not prevent them. As an Adjoining Owner, you cannot use the party wall process to block your neighbour’s project entirely.
However, you can use the process to ensure your property is properly protected. Dissenting triggers the formal route under the Act, which leads to a Party Wall Award setting out the conditions under which works must proceed.
A counter-notice lets you require your own additional works to the party wall, to be carried out at the same time for your benefit or convenience, for example building the wall higher or chasing in for services. It must be served within one month of the original notice.
Where those additional works benefit you, you generally meet the cost of that element. Whether a counter-notice helps depends on your situation, so it is worth taking advice before you respond.
In some cases, yes. The Act can grant the Building Owner a right to enter your land where it is necessary to carry out the works, but only with proper notice, normally 14 days. This is not an open-ended right.
The Party Wall Award sets out exactly when and how any access takes place, and what protective measures apply. Your surveyor makes sure the access provisions in the Award are reasonable and properly controlled.
In most cases, no. As a general rule, the Building Owner covers the reasonable fees of the Adjoining Owner’s surveyor as part of the party wall process. This is set out in the Party Wall etc. Act 1996 and applies to most standard residential matters.
The exact position can vary depending on the complexity of the works. LENIO provides a clear written confirmation of the fee position before accepting any appointment.
If your neighbour carries out notifiable works without serving a valid Party Wall Notice, you have legal recourse. You can apply to court for an injunction to stop the works and may also pursue a claim for any damage caused.
In practice, seeking advice promptly is important. We can advise you on the correct steps to take if works have already started without the required notice. Acting early gives you the strongest position under the Act.
The Schedule of Condition is the key document in this situation. It records the condition of your property before construction began and provides the baseline for assessing whether any damage is attributable to the works.
We compare the affected areas against the Schedule of Condition record and advise both parties accordingly. The Building Owner is responsible for making good any damage attributable to the notifiable works, or for a payment in lieu so you can arrange your own repairs.
Yes. As an Adjoining Owner, you have the right to appoint your own surveyor independently. You do not have to accept the surveyor the Building Owner suggests.
The only exception is an Agreed Surveyor arrangement, where both parties consent to a single impartial appointment. This requires your agreement. If you prefer independent representation, you are entitled to appoint your own surveyor.
Whether you have just received a notice or are unsure about works already underway next door, the right first step is a conversation. LENIO provides free initial advice to Adjoining Owners across London. There is no obligation.
