There is a rhythm to building work in London. Every spring, surveyors see a surge of party wall notices as homeowners gear up for summer projects. Knowing when to serve a party wall notice helps you beat that rush.
This post explains why spring is party wall season and how the notice periods shape your timeline. It also shows how to plan so the paperwork never holds up your build. It is written for homeowners, not for surveyors.
Why Spring Is Party Wall Season
Spring is when London homeowners commit to building work. The weather improves, and people want projects finished before the next winter.
That creates a seasonal spike. Architects file plans, builders fill their diaries, and party wall notices land on neighbours’ doormats from February onward.
The result is a busy few months for surveyors. That is why knowing when to serve a party wall notice early in the season really pays off.
Winter is quieter, which makes it the ideal time to get notices served and Awards agreed. The early birds start digging while others are still waiting.
A Month-by-Month View of Party Wall Season
The pattern repeats most years in London. It helps to know where the pressure points fall.
- January to February: owners finalise designs and architects file drawings.
- February to April: notices peak, and surveyors’ diaries fill quickly.
- May to August: the build season runs, with work underway across the city.
- September to November: a smaller autumn wave aims to finish before winter.
Serving your notice ahead of the February to April peak is the single best move. It keeps you out of the busiest stretch and protects your start date.
When to Serve a Party Wall Notice
The honest answer is as early as you can. You should serve a Party Wall Notice as soon as your design is settled.
Knowing when to serve a party wall notice is mostly about counting backwards. The notice period must expire before work can begin, so early service protects your start date.
When to Serve a Party Wall Notice for a Summer Build
For a summer build, that usually means serving in late winter or early spring. Leave it until the clocks change, and you risk a delayed start.
In practice, the owners who serve early in the season rarely wait. The ones who leave it late join the spring backlog.
There is no penalty for serving ahead of time, as long as you start within twelve months. So early is almost always the right call.
Notice Periods and Why Timing Matters
Every type of work has its own notice period. The notice period is the minimum time between serving and starting.
A notice for cutting into the wall needs two months. A notice for excavation needs one month. The notice period runs from the day the neighbour receives it.
So your real start date is the notice period plus any time spent agreeing an Award. Counting the notice period in early keeps your plan realistic.
In London, where many homes share walls on both sides, you may serve more than one neighbour. Each notice period runs separately, so the longest one sets your date.
Here is how the periods compare:
| Type of work | Notice period |
|---|---|
| Cutting into or altering the party wall | 2 months |
| Excavation within 3 or 6 metres | 1 month |
| New wall at the boundary line | 1 month |
The Two Months Notice for Structural Work
The longest wait is the two months notice. This applies when you cut into, raise, or alter the party wall itself, under section 2 of the Act.
Loft conversions and many extensions fall under this two months notice. So if your project touches the shared wall, plan for the full period.
Serving the two months notice early in spring is the simplest way to protect a summer start. It is the period most likely to catch people out.
Many owners assume a few weeks is enough. For wall work it never is, and that gap is where summer starts quietly slip.
The Schedule of Condition
Whatever the season, a Schedule of Condition should be taken before work starts. It records the neighbour’s property in its current state.
In the spring rush, do not let the Schedule of Condition slip. It is your best protection if a crack is later blamed on your build.
A surveyor can usually complete a Schedule of Condition quickly, even in a busy season. Booking it early avoids a last-minute scramble.
In a busy spring, the best surveyors book up fast. Reserve your Schedule of Condition slot the moment your notice goes out.
The Party Wall Award and Your Build Date
If a neighbour dissents, surveyors prepare a Party Wall Award before work begins. In spring, surveyors are busiest, so allow time.
A Party Wall Award usually takes a few weeks to agree. A single Agreed Surveyor is quicker than two, which matters most in peak season.
Building the Party Wall Award into your timeline means a dissent never derails your start date. Our guide on how long the process takes sets out realistic timings.
In high season, a two surveyor route can stretch things out. Agreeing a single surveyor early is worth real effort, and your neighbour often prefers it.
Plan Backwards From Your Start Date
The simplest planning trick is to work backwards. Fix your ideal start date, then subtract the notice period and any Award time.
For a summer loft, that often means serving notice in February or March. The official government booklet explains the periods, and a surveyor can map your dates precisely.
As an example, a June start needs a two months notice served by early April at the latest. Add a buffer for any dissent, and March is safer still.
Getting when to serve a party wall notice right is the difference between a smooth start and a delayed one. Early movers in spring keep control of their timeline.
Frequently Asked Questions
When should you serve a party wall notice?
As early as your design allows. Serve at least the notice period before you want to start, which is two months for wall work and one month for excavation. Earlier is always safer.
Why is spring the busiest time for party wall notices?
Because homeowners commit to summer projects when the weather turns. Plans are filed and builders are booked, so notices spike from February to May, and surveyors fill up fast.
How much notice do you give for a party wall?
Two months for cutting into or altering the party wall, and one month for excavation near a neighbour. The period runs from when the neighbour receives the notice.
How long before building work should I serve notice?
Allow the notice period plus a few weeks for any Award. For a summer build that means serving in late winter or early spring.
Can I serve a party wall notice too early?
A notice is valid for twelve months from service, so very early notice can lapse before you start. Serving once your design is fixed is the sweet spot.
Does the notice period start when I send it or when it arrives?
When the neighbour receives it. So allow for delivery, and keep proof of service in case the date is ever questioned.
What happens if I start work before the notice period ends?
The work is unlawful, and your neighbour can seek an injunction to stop it. Waiting out the notice period is always cheaper than fighting an injunction.