One of the first questions clients ask when they’re planning a project that involves party wall works is how long the whole process is going to take. It’s a fair question, particularly when you’ve already got a builder lined up and a programme to stick to. The honest answer is that it depends on how early you start and how straightforward the response from your neighbour turns out to be.
Notice Periods: Where the Clock Starts
The clock starts from the date the notice is served. The Act specifies minimum notice periods before notifiable works can begin, and these vary depending on the type of notice. A Section 3 Party Structure Notice, which is the most commonly required notice for works such as loft conversions and extensions, carries a two-month notice period. A Section 1 Line of Junction Notice and a Section 6 Adjacent Excavation Notice each carry a one-month notice period. For a full explanation of which notice applies to which type of work, see The 3 Types of Party Wall Notices Explained.
If your neighbour consents in writing within the 14-day response window, you can proceed with the party wall works once the notice period has elapsed. In that scenario, assuming a two-month notice applies, you’re looking at approximately eight to nine weeks from serving the notice to being able to start work on the party wall. That’s the best-case timeline, and it’s one that’s very achievable when the process is started early enough.
When Dissent Extends the Timeline
Where things extend is when a neighbour dissents or fails to respond at all. Dissent or deemed dissent triggers the surveyor appointment process, and from there a Party Wall Award needs to be prepared and agreed before works can start. In reasonably uncomplicated cases, getting from dissent to a finalised Award typically takes four to six weeks on top of the original notice period, depending on how quickly the surveyors can assess the works and agree the document. More complex schemes involving significant excavation or works to multiple properties can take longer still.
The scenarios that cause the most delays in our experience are those where the adjoining owner appoints a surveyor very late in the process, or where there are disagreements between surveyors on specific conditions of the Award. While both surveyors have a legal obligation to act expediently, the Act does not set a strict deadline for the Award to be completed. Waiting until two weeks before your planned start date to serve notice is a situation we see far too often, and it almost always results in delays to the build programme that could easily have been avoided.
Running the Party Wall Process Alongside Your Project
It’s also worth understanding that the notice period and the Award process can run alongside other aspects of your project preparation. Planning permission applications, building regulations submissions, and design work can all continue while the party wall process is underway. The key is to make sure the party wall process is started early enough that it doesn’t become the bottleneck.
For projects requiring a Schedule of Condition survey, this adds a further step, though it doesn’t necessarily add significant time if managed efficiently. The Schedule is typically completed before works begin and can often be coordinated with the Award process. More detail on why a Schedule of Condition matters is available in What Is a Schedule of Condition Survey and Why Does It Matter?.
What If Your Neighbour Doesn’t Respond at All?
If a neighbour ignores the notice entirely, the deemed dissent route adds roughly two to three additional weeks before a surveyor can be formally appointed on their behalf. This is covered in full in What Happens If My Neighbour Ignores My Party Wall Notice?.
Planning ahead is the single most effective way to manage the party wall timeline. At ALD Surveying, we work with clients from the earliest stages of their project to make sure the process doesn’t slow down their build. You can find out exactly how we approach this on our Party Wall Notices page.