If you're planning an extension, loft conversion, or structural work near a shared wall, you've probably started looking into party wall surveyors — and felt a cold sweat at the numbers. Fees of £900 to £2,700. Hourly rates of £150 to £300. Timescales stretching to months.
Here's the thing most people don't realise: nearly half of all party wall notices never get to that stage at all.
Around 45% of adjoining owners consent to a party wall notice. Their signature on a consent form, and the process is over. No surveyor appointment. No Party Wall Award. No bill beyond the cost of serving the notice itself.
That's not a loophole. It's exactly how the Party Wall etc. Act 1996 is designed to work.
What "consent" actually means under the Act
When you serve a party wall notice, your neighbour has 14 days to respond. They have three options:
- Consent — they're happy for the works to proceed, subject to the normal protections of the Act
- Dissent and appoint a surveyor — triggering the formal dispute resolution process
- Do nothing — which after 14 days counts as a deemed dissent, and surveyor appointments follow
Consent is the best outcome for everyone. It means the relationship is intact, the project can move forward after the relevant notice period (one or two months depending on the type of work), and nobody has to spend money on surveyors unless works actually cause a problem.
Why does consent rate matter so much?
Because the alternative is expensive — and the cost falls almost entirely on you, the building owner.
Under the Act, you pay not just your own surveyor's fees but also your neighbour's reasonable costs. A single-surveyor agreed case typically costs £900–£2,700. If each party appoints their own surveyor, those numbers can double. And if works are complex or the relationship is difficult, costs climb further still.
Consent sidesteps all of that. It doesn't remove your legal obligations — you still need to serve the notice properly, respect notice periods, and behave reasonably during works — but it keeps the process proportionate.
For a modest extension, the difference between a consented notice and a contested one can be several thousand pounds.
So what determines whether a neighbour consents?
Three things, mostly:
1. How the notice is served
Neighbours who feel blindsided, confused, or suspicious are more likely to dissent — not necessarily because they object to the works, but because they don't understand what they're agreeing to. A clear, professionally worded notice that explains what's happening and what their rights are sets a very different tone from a scribbled letter shoved through the letterbox.
2. Whether the notice is correct
An incorrect or incomplete notice isn't just a legal risk — it creates doubt. If a neighbour's solicitor spots a defect, the whole thing may need to be re-served, wasting weeks and flagging to your neighbour that the process wasn't handled carefully. That erodes trust before the conversation has even started.
The notice must include the building owner's name and address, the adjoining owner's name and address, a description of the works (with drawings for excavation works), the proposed start date, the relevant section of the Act, and the correct service method.
3. The works themselves
Major structural interference — removing party wall sections, deep excavations close to foundations — naturally creates more concern. But most domestic extensions, loft conversions, and single-storey rear extensions don't fall into that category. The neighbour's main concerns are usually noise, dust, and damage. A notice that addresses those concerns in plain English, and reminds them that a schedule of condition protects their interests, goes a long way.
What a good notice looks like in practice
A correctly served party wall notice is a short, formal document. It names both parties. It describes the works clearly and without jargon. It states the notice type (Section 1 for line of junction works, Section 3 for party structure works, Section 6 for excavations near foundations). It gives the proposed start date. And it tells the neighbour exactly what their options are — and how to respond.
It's not complicated, but the details matter. The wrong section number, an incomplete works description, or a failure to name a mortgagee where one exists are the kinds of errors that invalidate a notice — sometimes months later, after works have already started.
Why "DIY" notices carry risk
You can serve a party wall notice yourself. The Act doesn't require a surveyor to prepare one. But the statutory form is a starting point, not a complete solution.
Most self-served notices fail because of what they leave out: inadequate works descriptions, incorrect party identification, missing drawings for Section 6 notices, or wrong notice periods. These errors may not become apparent until the neighbour takes advice — at which point the project is already under way.
Professionally prepared notices get the detail right from the start. And a correct, professional-looking notice signals to your neighbour that the process is being taken seriously — which is itself a reason to consent rather than appoint a surveyor.
The practical approach: get the notice right, then talk to your neighbour
The most effective strategy is simple:
Step 1: Serve a properly prepared, legally correct notice.
Step 2: Talk to your neighbour separately — not to pressure them, but to make sure they understand what the notice means. Reassure them about disruption, explain how a schedule of condition protects their property, and answer any questions.
Step 3: Wait for their response. Many neighbours who were uncertain initially will consent once they've had a conversation and feel informed.
The Act requires the notice. The conversation is your own initiative. Together, they're the most reliable path to the 45%.
What if your neighbour dissents?
Dissent isn't the end of the project. It's the beginning of the formal process, and the Act provides a clear structure for it. Surveyors are appointed, a Party Wall Award is drawn up setting out the conditions under which works proceed, and the project moves forward.
The costs are real — but so is the protection the Award provides. Once an Award is in place, both parties have legal certainty. Works can proceed on defined terms.
Our panel includes surveyors whose professional qualifications and memberships include RICS, the Faculty of Party Wall Surveyors, and the Pyramus & Thisbe Society. A panel surveyor can act as Agreed Surveyor for both parties, keeping costs lower than the two-surveyor route. If your neighbour dissents, we'll explain your options and what to expect at every stage. You can also find a surveyor by postcode.
Ready to serve your notice?
The best time to start the party wall process is now — notice periods run from the date of service, not the date you started planning. Waiting until you're ready to break ground is the most common cause of project delays.
Generate a legally correct party wall notice in minutes, from £30 inc VAT. Not sure whether you need one? Take the free eligibility checker first.