Rights of light and planning daylight: two different systems

Planning permission does not give you the right to block a neighbour's light. Rights of light is a private property right, enforced in the civil courts, and a local planning authority has no power over it. A scheme can pass every BRE test, get consented unanimously at committee, and still be stopped by an injunction.

Developers who learn this at the wrong moment learn it expensively. The two workstreams need running in parallel from feasibility.

The civil easement and how it is acquired

A right of light is an easement: a property right benefiting one piece of land at the expense of another. It attaches to light passing through a defined aperture, meaning a window or a rooflight, into the room behind it.

It can arise in three ways. By express grant in a deed. By implied grant, typically on the sale of part of a property. Or, most commonly, by prescription through long enjoyment.

Two consequences follow that surprise people. Open land has no right of light, so a garden, a yard or a roof terrace acquires nothing however long it has been enjoyed. And a solar panel is not an aperture into a room, so no easement can arise for one.

The right belongs to the land, not to the current occupier. A tenant who has been there two years benefits from an easement the building acquired 40 years ago.

What the Prescription Act 1832 provides

Section 3 of the Prescription Act 1832 is the usual route. Where light has been enjoyed through a defined aperture without interruption for 20 years, the right becomes absolute and indefeasible, unless it was enjoyed by written consent.

Three details do most of the practical work.

Twenty years is counted backwards from the date proceedings would be issued, so the clock is not fixed at the moment you look at it.

Interruption means an actual physical obstruction acquiesced in for a year. That is why the Rights of Light Act 1959 exists: it allows a notional obstruction to be created by registering a light obstruction notice as a local land charge, which has the effect of a physical hoarding without building one. It is a defensive tool, principally used by owners who want to stop a neighbour's right maturing.

And written consent defeats prescription. A licence granted to the neighbour, however informal, can stop the clock, which is why old correspondence files repay a search before you assume a right exists.

How the civil test differs from BRE 209

The two systems measure different things, to different standards, for different purposes.

The test in the civil cases is not whether light has been reduced. It is whether enough light remains for the ordinary purposes of the occupier, a formulation running back to the House of Lords decision in Colls. A substantial reduction that still leaves an adequately lit room gives rise to no claim. A smaller reduction to a room already poorly lit may be.

That means a scheme can comfortably pass the planning tests and still cause an interference a court would act on, and the reverse is also true.

Why a planning permission is no defence

Permission authorises the development in planning terms. It does not authorise interference with private rights, and the courts have said so repeatedly. Planning permission can be relevant to how a court exercises its discretion, and the character of a locality established through planning decisions has been treated as relevant to nuisance claims, but it is not a defence.

There is one route that does override easements, and it is a public one. Section 203 of the Housing and Planning Act 2016 allows a qualifying authority to override easements and restrictive covenants where land has been acquired or appropriated for planning purposes, with the affected party entitled to compensation rather than an injunction. It converts an injunction risk into a payment.

That route requires a public body's participation and its own process, and it is not available to a developer acting alone. Where it is available, it is often the difference between a scheme being financeable and not.

Injunctions, damages and release agreements

The remedy is what makes this a board-level issue rather than a technical one.

A court may grant an injunction restraining the development, and in principle a mandatory injunction requiring part of a completed building to be taken down. Injunctions of that kind have been granted, which is why lenders and insurers treat unresolved rights of light as a real risk rather than a theoretical one.

More often the court awards damages in lieu. The approach to that discretion was revisited by the Supreme Court in Coventry v Lawrence, and the quantum in rights of light cases has frequently been assessed by reference to a share of the developer's profit attributable to the interference rather than to the diminution in value of the affected property. That is why release negotiations are expensive.

The practical routes to certainty are three: negotiate a release with each affected owner, take out a rights of light indemnity policy where the risk profile suits it, or design the interference out. Insurers usually require that no approach has been made to the beneficiary, so the decision to insure has to be taken before the negotiation, not after it.

Sequencing the two workstreams

An illustrative sequence for a city centre scheme.

1. At feasibility, commission a rights of light appraisal alongside the massing study, identifying which neighbouring apertures have or may have rights and what the injury looks like.
2. Test the massing against both systems. Where the two pull in different directions, know which constraint is binding before the design is fixed.
3. Decide the strategy: design out, insure, negotiate, or explore a section 203 route with the local authority.
4. If insuring, do it before any approach to a beneficiary.
5. Run the planning Daylight and Sunlight Assessment for the application, which addresses the planning tests and says nothing about the civil position.
6. Keep the civil work confidential and outside the planning submission, because material submitted with an application is public.

Point six matters and gets overlooked. Publishing a rights of light appraisal on the council's website tells every potential claimant exactly what their claim is worth.

What to tell a client at feasibility stage

Three sentences, and they should be in writing.

Planning consent will not protect the scheme from a rights of light claim, and the two assessments answer different questions.

The remedy for a claim can be an injunction, so the risk runs to the building itself rather than to the budget alone.

And the cost of dealing with it falls dramatically the earlier it is identified, because at massing stage the answer may be a setback of a metre on one elevation.

Where the concern is amenity space rather than windows, that is a planning matter and an Overshadowing Study is the right document, because no easement of light can arise for open land. PlanScope drafts the planning daylight and amenity documents structured to UK planning policy, with a "to be confirmed" flag wherever modelling outputs are missing, and a reviewer from the professional directory can review and sign off a draft. This is general guidance, not legal advice, and rights of light is a legal question for a solicitor and a specialist surveyor. 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.