Side Return & Rear Extensions
The classic local project. New foundations near the neighbour, or building to the boundary, bring the Act into play under the excavation and boundary provisions.
Sections 1 & 6Planning works on a Ealing home, or just received a Party Wall Notice from a neighbour? LENIO Party Wall Surveyors handles the whole process for you.
Looking for a party wall surveyor in Ealing? LENIO Party Wall Surveyors works across Ealing Broadway, West Ealing, Northfields, Hanwell and Pitshanger, on both sides of the wall.
This is part of our West London coverage, and a busy party wall area for suburban homeowners. Most side returns, lofts and extensions here engage the Party Wall etc. Act 1996.
Most homeowners here ask this before a side return, loft or extension, usually when an architect raises it. Whether you need a notice depends on the works and how close they sit to your neighbour.
This guide sets out exactly which works are notifiable, how proximity to the boundary matters, and what to do if you are uncertain.
These semis share a wall with the house next door, so most projects affect that shared wall or dig near the boundary. That is why most works are notifiable, and the party wall notice Ealing projects require is the first formal step. Our guide on whether you need a Party Wall Notice covers it in full.
Ealing earned its “Queen of the Suburbs” name for a reason. Leafy streets of Edwardian and Victorian semis run through Northfields, Pitshanger and West Ealing, most with generous gardens. The side return is the classic local project.
These semis share a wall with the house next door, so a side return or loft almost always engages the Act. Large gardens also bring new boundary walls and garden rooms into play.
With so many homes sharing a party wall, most extensions here touch a neighbour. Getting the notice right early keeps a good relationship and the build on track.

Most Ealing projects engage the Act through one of four works. Each triggers a different notice.
The classic local project. New foundations near the neighbour, or building to the boundary, bring the Act into play under the excavation and boundary provisions.
Sections 1 & 6Steel beams bearing on the party wall, or raising it to form a gable, are structural works served under a Party Structure Notice.
Section 3Removing a breast that forms part of a shared stack is work to a party structure. That applies even when the rest of the job is on your side.
Party StructureA wall built on the boundary line, or a garden room with foundations near next door, is notifiable. A large garden does not put you outside the Act.
Section 1The most common mistake we see in Ealing is confusion over who pays the surveyor fees. Some Building Owners expect the neighbour to pay, while some neighbours fear a bill for simply being next door.
In most cases, the Building Owner carrying out the works pays the reasonable party wall fees, for both sides. The Adjoining Owner is being affected by the works, not benefiting from them.
So if you are planning the project, budget for the party wall costs from the start. If a neighbour has served notice on you, your surveyor is usually paid by them.
Whichever stage you are at, LENIO Party Wall Surveyors handles the full process for Ealing owners. The work falls into a few clear services, for Building Owners and Adjoining Owners alike.

We confirm which party wall notice Ealing homeowners need and serve it on the right Adjoining Owners. Serving the notice correctly keeps the project on programme.
Explore Party Wall Notices →
Our party wall survey records the photographic baseline of the neighbouring property before works begin. It protects both sides if a damage claim arises later.
Explore Schedule of Condition →
Where your neighbour dissents, we prepare the Party Wall Award that lets the works proceed. It sets out how the works proceed and how both properties are protected.
Explore Party Wall Awards →
If you are planning the works, we act as your surveyor, serving the notices and steering the process so your Ealing project stays on track.
Explore Building Owner Surveyor →
If a neighbour has served a notice on you, we act for you, protecting your property and your rights, usually at the Building Owner's expense.
Explore Adjoining Owner Surveyor →
Where both neighbours are happy with one impartial surveyor, LENIO can act as the Agreed Surveyor for both. It is the quicker, more cost-effective route after a dissent.
Explore Agreed Surveyor →Three terms Ealing homeowners ask about most, and what each one actually means for your project.
A Party Wall Award is the document surveyors prepare when a neighbour dissents to your notice. It sets out how the works are carried out, the working hours, access arrangements and a Schedule of Condition. You only need one if your neighbour dissents, or does not respond within 14 days. If they consent in writing, the works proceed on the notice alone.
Many homeowners say party wall agreement when they mean either written consent or the Award that follows a dissent. A verbal yes gives no protection. If your neighbour consents in writing, that written consent is the agreement Ealing owners rely on. If they dissent, the Award becomes the formal agreement that governs the works.
Before works begin, a party wall survey records the condition of the neighbouring property in photographs and notes. On these Edwardian semis, where your extension joins the shared wall, that baseline is what settles any later question about damage. Both owners hold the same record, so neither side can argue about what the property looked like before the works.
A quick review of your plans usually confirms whether notice is required, which notice applies, the likely timescales, and the next steps. LENIO Party Wall Surveyors gives free initial advice before work starts, with no obligation. For Ealing, that usually starts with a look at how your side return & rear extensions sits relative to the boundary.
A party wall surveyor Ealing homeowners trust does more than send a letter. The job is to confirm which notices your project needs and serve them on every qualifying owner. It also means resolving any dispute so the works can begin on time.
LENIO Party Wall Surveyors is a specialist practice, led by a Chartered Civil Engineer and Member of the Institution of Civil Engineers (ICE). The lead surveyor is also a Chartered Building Engineer and Member of the Chartered Association of Building Engineers (CABE). On Ealing side returns, lofts and suburban semis, that mix of engineering and party wall knowledge is exactly what the job needs.
LENIO knows the local suburbs and their semi-detached stock well, and handles the process end to end. We keep your neighbour relationship calm while the works go ahead. LENIO is the party wall surveyor Ealing homeowners call first.
Chartered Civil Engineer, Member of the ICE
Chartered Building Engineer, Member of the CABE
LENIO is based in central London and covers Ealing and the wider West London area in person. We attend for the party wall survey and the Schedule of Condition, so wherever your project sits in Ealing, a chartered surveyor comes to you.
Call LENIO TodayA party wall matter is rarely about conflict. It is about doing the works properly while protecting the property next door, and keeping a neighbour you will see again on side. A specialist party wall surveyor in Ealing handles it quietly and correctly, so the project does not stall. Here that most often means side return & rear extensions, so it is usually the first thing we ask about.
The risks of getting it wrong are real. An invalid notice restarts the clock and delays the build. A missing Schedule of Condition leaves you exposed to a damage claim that is hard to defend, especially on older properties. A neighbour who feels ignored is far more likely to dissent.
LENIO Party Wall Surveyors leads with reassurance, not alarm. The first conversation is free, and a clear quote follows once the drawings have been reviewed.
Still working through a party wall question? These guides answer the most common ones in full. Start with the one closest to your situation, or explore the full library.
Which works are notifiable, how proximity to the boundary matters, and what to do if you are uncertain.
Explore The Guide →If your neighbour dissents, your project is not blocked. The surveyor route, the Award, and how long a dissent adds.
Explore The Guide →What each one is, when each applies, and how a notice can lead to an Award, so you know which applies to you.
Explore The Guide →The timeline stage by stage, what makes it longer or shorter, and how serving notice early keeps you on schedule.
Explore The Guide →Typical fee ranges for notices and Awards, who pays, and how to keep your party wall costs down.
Explore The Guide →What it includes, when you need one, what it costs, and how it protects both sides if damage is alleged.
Explore The Guide →Yes. LENIO works across the whole borough, from Ealing Broadway and West Ealing to Northfields, Hanwell and Pitshanger. If your street is not named on this page, a quick call confirms that we cover it.
We travel to you for the party wall survey and the Schedule of Condition, as part of our West London coverage.
In most cases, the Building Owner doing the works pays the reasonable fees, for both sides. The neighbour is being affected by your project, not benefiting from it.
If a neighbour serves notice on you, your surveyor is usually paid by them. We set the fee basis out clearly at the start.
Usually, yes. A side return digs new foundations near the boundary and often ties into the shared wall, which engages the Act. A party wall notice in Ealing is decided by the works, not the size of the extension.
A quick look at your drawings confirms which notices apply before you commit to a start date.
It can, yes. A wall built on the boundary line, or a garden room with foundations within three or six metres of next door, is notifiable. A large Ealing garden does not put you outside the Act.
A quick look at your plans confirms whether notice is required before you start.
There is no single price, because the cost depends on how your neighbour responds and how many owners are involved. A consented notice sits at the low end, while a party wall award in Ealing, after a dissent, costs more.
LENIO gives free initial advice and a clear quote after reviewing your drawings. You will know the cost before any work begins.
Whether you are planning works or have received a notice, LENIO Party Wall Surveyors can help across Ealing and West London. Contact us for free initial advice and a clear quote based on your project. Side Return & Rear Extensions is the project we see most often here, so we usually know the ground before we start.