Overlooking refusals and the evidence that shifts them

An overlooking refusal appeal is won on drawings and photographs rather than on argument, and on a householder application you have twelve weeks from the date of the decision notice to lodge it. That deadline is shorter than the six months allowed for most other appeals, and the householder appeals service runs on the material that was already before the council plus your appeal statement. You cannot feed in a new survey later. So the section drawings, the sightline plan and the photographs from the neighbour's side of the fence either exist by the time you appeal or they never do.

Start by working out whether the inspector can realistically disagree with the council. On overlooking, the answer is often yes, because separation distance standards are guidance rather than rules.

How overlooking is assessed

Overlooking is assessed as a loss of privacy to a neighbouring property, and the areas that attract protection are habitable rooms and the part of a garden immediately behind the house that is used as private outdoor space. The far end of a long garden attracts much less protection, and inspectors say so regularly.

The assessment looks at what can actually be seen from where. That means the position and height of the proposed windows, the eye level of a person standing or sitting inside, the distance to the neighbour's windows or private garden area, the angle of view, any difference in ground level between the two properties, and what already stands between them.

Two framing points worth getting straight before you write anything. There is no right to a view in planning, so a neighbour complaining that they will see your extension is not raising a privacy issue. And a degree of mutual overlooking is normal in most residential areas, so the question is whether the proposal causes a material loss of privacy beyond what already exists.

Our note on neighbour amenity refusals for overlooking and overbearing effect covers how the two issues differ, because councils often run them together in one reason for refusal and they need separating in the response.

Separation distances and where they come from

Most councils publish separation distances in a householder design guide or a supplementary planning document. The figures in common use are around 21 metres between facing habitable room windows across rear gardens, and a shorter distance, often in the region of 10 to 13 metres, between a habitable room window and a blank wall or a boundary.

Those numbers are not national policy. They descend from local design guidance and they are applied as a starting point rather than as a test. That matters, because a refusal which says the proposal fails to achieve 21 metres and stops there has not assessed the actual effect, and an inspector will often say the standard has been applied mechanically.

So handle them in two steps. State the distance your scheme achieves, measured and annotated on a drawing rather than asserted. Then explain why the effect is acceptable despite any shortfall, by reference to the angle of view, the existing situation, the levels and the boundary treatment.

Where the scheme meets the published distance, say so once and move on. Where it does not, address the shortfall directly in the first paragraph of that section. Burying it invites the inspector to find it.

Oblique views and intervening features

The angle matters as much as the distance. A window looking squarely into a neighbour's rear window at 15 metres is a real privacy issue. The same window set at 60 degrees to the neighbour's elevation, so the view along the glass line is oblique, usually is not, because the practical view is of your own boundary rather than into their room.

Show the angles on a plan with view cones drawn from each proposed window, and annotate what falls inside each cone. This single drawing does more work than several pages of text.

Intervening features are weighed by how permanent they are. A brick boundary wall, a garage, a retained outbuilding or a change in level is durable and carries real weight. A close-boarded fence is accepted but carries less, since it can be removed or replaced at a lower height. Planting carries the least weight of all, because it is seasonal, it can be removed, and the council cannot rely on a neighbour maintaining it. Offer planting as an enhancement rather than as the answer.

Levels cut both ways. A proposal on ground that falls away from the neighbour reduces the overlooking; one on rising ground increases it, and an inspector will notice if your drawings show no levels at all.

Offering obscure glazing or a screen

Obscure glazing with a fixed lower pane is the standard mitigation and it is accepted in the right circumstances. The usual form is obscure glazing to a stated privacy level, with the window non-opening below a cill height of around 1.7 metres above internal floor level so it cannot be leaned out of.

The circumstances in which it works: a secondary window to a room that has another source of outlook and daylight, a stair or landing window, a bathroom or utility window, or a first floor flank window facing a neighbouring boundary at close range.

The circumstances in which it does not: the only window serving a habitable room, where obscuring it creates a room with no outlook, and a window whose purpose is to provide daylight that a Daylight and Sunlight Assessment shows is needed. Offering to obscure the only window in a bedroom usually replaces a privacy objection with an amenity objection.

Screens are the equivalent mitigation for balconies and roof terraces, which are far more sensitive than windows because people linger on them and look around. A screen of around 1.7 to 1.8 metres in an obscure or solid material, returning along the sides, is the standard solution. On a householder appeal, offering to reduce a terrace to a Juliet balcony, or to delete it entirely, is often the move that resolves the case.

Put any offer in the appeal as a suggested condition with wording. An inspector can impose a condition and cannot redesign your scheme.

The photographs and sections that carry weight

Four pieces of evidence do most of the work, and none of them requires a consultant.

1. A cross-section through both properties at the point of closest approach, drawn to scale, showing ground levels, boundary treatment, the proposed window cill and head heights, and a sightline from a standing eye level of about 1.5 metres inside the room.
2. A plan with view cones from each proposed window, annotated with distances to the neighbour's windows and to the nearest private garden area.
3. Photographs taken from the neighbour's likely viewpoint, meaning from their rear windows or their patio, looking towards your site. Ask politely for access. If access is refused, photograph from the equivalent position on your own property at the same height and say that is what you have done.
4. Photographs from the proposed window positions, taken from a platform or an upstairs window at approximately the right height, showing what would actually be visible.

Date every photograph and mark the camera positions on a plan. An inspector deciding on written representations is working from your drawings and will be grateful for a plan that shows where each image was taken.

Where the council has relied on a site visit note or an officer report describing the view, read it carefully and respond to what it actually says rather than to what you assume it says. Our note on reading a refusal notice and turning it into a plan covers that step.

Where the refusal is likely to stand

Be honest with yourself before spending the fee, because some schemes are hard to rescue on appeal.

New first floor windows in a flank elevation looking directly down a neighbour's garden at close range. Roof terraces and balconies overlooking a neighbour's patio area, where no screen fully answers the point. A rear extension with first floor windows at a short separation distance and no intervening feature. Dormers on a side roof slope facing a neighbour's private amenity space. Development on land raised above a neighbour's garden level.

In those cases the better route is usually a revised application rather than an appeal, and the revision is often small: move the window, change the opening to a rooflight above the eye level, delete the terrace, or flip the internal layout so the sensitive elevation carries the bathroom.

A revised application also avoids the twelve week clock, since you can submit a new application at any time, and a free-go application may be available where the first was refused. Check the position with the council.

Assembling a householder appeal

Keep the appeal itself short and evidenced.

Complete the appeal form online within twelve weeks of the decision notice, and check that you have included every document that was before the council, since the inspector works from the same material. Write a statement of no more than a few pages that takes each reason for refusal in turn, states what the drawings show, addresses the separation distance shortfall if there is one, explains the angle and the intervening features, and offers conditions with wording.

Do not use the appeal to introduce a different scheme. Where the design needs to change, that is a new application. And do not argue that other houses in the street overlook each other unless you can identify them on a plan with distances, because unevidenced comparisons irritate inspectors.

A well prepared Planning Statement at application stage means most of this material already exists, and the design reasoning belongs in the Design and Access Statement where the window positions can be explained as a choice rather than defended as an accident.

This is general guidance rather than legal advice, so check the position with your local planning authority or a qualified professional before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.