What happens if my neighbour objects to my extension in London?

If your neighbour objects to your extension, the council records the objection, weighs only the planning points in it, such as loss of light or overlooking, and still makes its own decision; a neighbour cannot veto a planning application. Our planning drawings start at £745, and that fixed fee covers redrawing the scheme if the case officer asks for a change to answer a fair objection. The one route where an objection changes the process itself is prior approval for a larger single-storey rear extension, which this post covers separately.

By the DrawingsDirect drawing team · 1 November 2026 · 9 min read

An objection is a comment, not a veto

Homeowners who search for what happens when a neighbour objects to a planning application are usually worried about one thing: can the person next door stop the extension? They cannot do it by objecting alone. Government guidance on decision-making says that local opposition or support for a proposal is not in itself a ground for refusing or granting permission, unless it is founded on valid planning reasons.

So the council is not counting votes. It reads each comment, separates the planning points from everything else, and puts the planning points into the officer's assessment alongside the drawings and the local plan. One well-argued objection about a blocked kitchen window can matter more than ten letters that only say the writers do not like the idea.

Neighbours usually learn about the application from a letter or a notice on a lamp post. For most householder schemes the council must either display a site notice for not less than 21 days or serve notice on the adjoining owners or occupiers. Our post on what happens after your planning drawings are finished walks through that whole timeline; this one stays with the objection itself.

What happens to a neighbour's objection on a householder application

Comment logged
The neighbour comments during consultation. Councils such as Wandsworth and Haringey publish comments with the writer's name and address.
Planning points sorted
The officer separates planning matters, such as light and privacy, from matters the council cannot weigh, such as property value.
Weighed with policy
Each planning point is tested against the local plan, the drawings and a look at the site, then given the weight it deserves.
Change or decide
The officer may ask for an amended drawing to answer a fair point, or decide the scheme as drawn.
Reasons recorded
The officer's report explains how each planning objection was dealt with, whatever the decision.

What counts as a material planning consideration, and what does not

A material planning consideration is simply one that is relevant to the planning decision. Government guidance says planning is concerned with land use in the public interest, so purely private interests, such as the effect on the value of a neighbouring property, cannot be material considerations.

London councils spell this out for objectors. Wandsworth's page for people commenting lists what it can take into account: traffic or parking, the appearance of the proposal, overlooking or disturbance, loss of light or privacy. The same page lists what it cannot: loss of property value, private disputes between neighbours, leases or covenants, the impact of construction work and party wall issues. Haringey's guidance names loss of view and loss of value among the points it cannot consider.

The line is finer than it looks. Nobody has a right to a private view across your garden, but a tall flank wall right on the boundary can still be objected to as overbearing, or as an unreasonable sense of enclosure, and that is a planning point. When we draw a rear or side extension, those are the effects we test the scheme against before it goes in, because they are the ones that carry weight.

Row of London terraced houses sharing party walls, where a rear extension on one house sits right beside the neighbours' windows — On a terrace the neighbours either side live inches from the new wall, so light and outlook are the usual objections.

How the case officer weighs the points that count

The officer starts from the council's own policies and any design guidance it has published for extensions, which may set tests for depth, height on the boundary and light to a neighbour's nearest window. An objection about loss of light is checked against those tests and against the drawings, often with a look from the neighbour's side of the fence.

That is why accurate drawings help you here. A scaled section showing exactly how far the eaves sit from the boundary, and an elevation showing the neighbour's window, let the officer answer the objection from the set in front of them rather than from a guess. Drawings that leave the relationship to next door unclear tend to draw a request for more information, which costs time.

The officer's report then explains how each planning objection was dealt with. If the officer decides that the effect on the neighbour is acceptable, the objection is noted and the scheme can still be granted. If the effect is not acceptable, the objection becomes part of the reason for asking for a change, or for refusing.

Prior approval for a larger rear extension: where an objection changes the process

There is one route where a neighbour's objection matters by itself. Under permitted development, a single-storey rear extension can go up to 6 metres beyond the rear wall of a semi-detached or terraced house, or 8 metres for a detached house, outside a conservation area, if you first go through the larger home extension prior approval process under paragraph A.4. The council writes to the adjoining owners or occupiers and gives them at least 21 days to make representations.

If no adjoining neighbour objects, the council does not assess the effect on neighbours. If any adjoining owner or occupier objects, prior approval of the impact on the amenity of adjoining premises is required, and the council then has to look at the effect on all adjoining premises, not only the one that objected. Either way, the council has 42 days from receiving the details to decide; if it gives no decision in that time, the work may go ahead as described.

This route is narrower than a full application. The council judges only neighbour amenity, not design or policy, so a clear, accurate set of drawings matters even more. Our prior approval service for larger home extensions and our step-by-step prior approval guide explain the forms and limits; our post on what a prior approval extension costs covers the fees.

Two routes for a rear extension, and what each costs to apply

Our planning drawings, survey included: £745
Council householder application fee: £548
Our prior approval drawings and forms: £595
Council prior approval fee: £249
Total: £2,137

Do objections send an extension to the planning committee?

Sometimes, and the rules differ from borough to borough. Each council sets its own scheme of delegation, which says which applications its officers decide and which go to a committee of councillors. Government guidance notes that these arrangements can include conditions or limits on the extent of delegation, and that is where the triggers sit.

In some London boroughs a set number of objections, or a request from a ward councillor, moves an application to committee; in others, small householder schemes almost never go there. We will not quote a single threshold, because there is not one. If your scheme draws a lot of comments, we read your council's scheme of delegation with you and tell you what it means for the timing.

Committee is not a worse outcome in itself. Councillors receive the officer's report and recommendation, and the same rule applies: they decide on planning grounds, not on the number of letters.

Amending the drawings to answer an objection

Most objections that matter are about one edge of the scheme: a wall that is too tall on the boundary, a window that looks straight into a neighbour's garden, or a depth that cuts light to a kitchen next door. Each has a drawing answer. A parapet can drop to a lower eaves line, a side window can be obscure-glazed and fixed shut below a set height, a roof can slope away from the boundary, or the depth can come back by a metre.

If the case officer agrees that an objection is fair, councils often ask for amended drawings rather than refuse. We redraw the scheme as part of our fixed fee, check the change with you first, and send the amended set back to the officer. The council may then let neighbours see the change; Wandsworth, for example, says neighbours typically have 14 days to comment on amended plans. Other councils set their own practice.

It is often worth talking to the neighbour before any of this. Showing them the drawings early, and the parts that affect their side, can settle a worry before it turns into a written objection. If they still object, you will at least know which edge of the scheme to look at.

Blockwork shell of a London house extension next to the neighbouring garden fence, showing how close the new wall sits to next door — The height and position of the wall on the boundary are the details an amended drawing usually changes.

A party wall dispute is a separate process

Neighbours often mix the two up, and so do some objection letters. Government guidance says plainly that party wall agreements are different from planning permission and building regulations approval. The council will not refuse an extension because of a party wall worry, and getting planning permission does not settle one.

If your work affects a shared wall or digs near the neighbour's foundations, you serve notice under the Party Wall etc. Act 1996. The neighbour must reply in writing within 14 days if they consent. If they refuse, or do not reply at all, the dispute resolution process starts and surveyors are appointed to settle the terms; you cannot treat silence as agreement.

So a neighbour who objected to the planning application keeps their party wall rights whatever the council decides, and a neighbour who did not object can still dissent to a party wall notice. Our post on what party wall notices cost and our party wall notices and drawings service explain the timing.

Victorian terrace with bay windows on a London street, where every house shares a party wall with the house next door — On a terrace, almost every extension needs both a planning decision and a party wall notice.

If the objection leads to a refusal

A refusal that cites a neighbour's light or outlook names the local policy behind it, and that gives the redesign a clear brief. You can amend the scheme and apply again, or appeal. Only the applicant has a right of appeal: under the Planning Act, it is the applicant who may appeal, so a neighbour cannot appeal a grant in the same way.

For a householder appeal, government guidance says that no one can comment on a householder planning appeal; the council must tell people who commented on the original application that the appeal has started. Our post on who can redraw your plans after a refusal explains how a refusal notice becomes the brief for the next set.

To get a fixed fee for drawings that show the effect on next door clearly from the start, use the form on our planning drawings page. All our fees are on the pricing page.

Sources

Every figure in this article, where it comes from and a link to the original.

21: DMPO 2015 art 15(5)(a) (source wording: "by site display in at least one place on or near the land to which the application relates for not less than 21 days"). www.legislation.gov.uk
not in itself a ground: PPG Determining a planning application, para 016 (source wording: "Local opposition or support for a proposal is not in itself a ground for refusing or granting planning permission" unless founded upon valid material planning reasons). www.gov.uk
not material: PPG Determining a planning application, para 008: protection of purely private interests such as the impact of a development on the value of a neighbouring property could not be material considerations. www.gov.uk
6 or 8: GPDO 2015 Sch 2 Part 1 Class A para A.1(g): single-storey rear enlargement up to 8 metres beyond the rear wall (detached) or 6 metres (any other dwellinghouse), subject to A.4. www.legislation.gov.uk
21: GPDO 2015 Sch 2 Part 1 Class A para A.4(5): notice served on each adjoining owner or occupier, period for representations not less than 21 days from the notice. www.legislation.gov.uk
objection triggers amenity assessment: GPDO 2015 Sch 2 Part 1 Class A para A.4(7) and (9): where any owner or occupier of any adjoining premises objects, prior approval is required as to the impact on the amenity of any adjoining premises; the authority assesses the amenity of all adjoining premises. www.legislation.gov.uk
42: GPDO 2015 Sch 2 Part 1 Class A para A.4(10)(c) (source wording: "the expiry of 42 days following the date on which the information referred to in sub-paragraph (2) was received"). www.legislation.gov.uk
14: Wandsworth Council, Comment on a planning application: when amended plans are re-consulted on, neighbours typically have 14 days to comment. www.wandsworth.gov.uk
14: GOV.UK Party walls and building work, Reaching an agreement with your neighbours (source wording: "Your neighbour must let you know in writing within 14 days if they consent to your notice"). www.gov.uk
no comments: GOV.UK Appeal a householder planning decision, Comment on an appeal (source wording: "No one can comment on a householder planning appeal"). www.gov.uk

Questions people ask

Can my neighbour stop my extension by objecting?

Not by objecting alone. The council weighs the planning points in an objection, such as loss of light or overlooking, and still makes its own decision. Opposition on its own is not a reason to refuse.

Does the council count how many objections there are?

Not as a vote. The number can matter in one way: some councils send applications with many objections to a committee instead of an officer. The decision is still made on planning grounds.

My neighbour says the extension will lower their house price. Does that count?

No. Government guidance says the effect on the value of a neighbouring property is a private interest, not a material planning consideration.

What if a neighbour objects to my prior approval extension?

Then the council must assess the impact on the amenity of all adjoining premises before it decides. It still has 42 days from receiving the details, and judges only the effect on neighbours.

Will I see what my neighbour wrote?

Usually, yes. Councils such as Wandsworth and Haringey publish comments on the application page with the writer's name and address. If the case officer asks for a change to answer one, we redraw within our fixed fee.

Does planning permission settle a party wall dispute?

No. Party wall matters are handled under the Party Wall etc. Act 1996, separately from planning. Your neighbour keeps those rights whatever the council decides.

Photographs: David Hawgood (CC BY-SA 2.0); Altaf Shah (Pexels License); David Hawgood (CC BY-SA 2.0); Martin Sepion (Unsplash License).

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