Rights of Light UK: Obstruction Notices & Claims

What this document is

A right of light is a form of easement: a private property right that entitles the owner of a building to keep receiving a reasonable amount of natural daylight through defined apertures, usually windows. It is not a right to direct sunlight, and it is not a right to a view.

What it protects is enough light to make ordinary use of the rooms behind those windows, judged by the standards of the property's normal purpose. These rights attach to the building, not to the person, so they pass with the land when it changes hands.

The most common way they arise is through long use, often called prescription. If a building has enjoyed light through a particular window without interruption or written permission for at least 20 years, the owner can generally claim a right against the neighbouring land.

Rights of light can also be created expressly, by deed, or implied into a transfer when land is sold off in parts. Once established, they can restrict what a neighbour builds, and in some cases a court will order an injunction or damages where a new structure substantially interferes with the light.

How to use this document

1. Work out whether a right of light exists. Look at how long the building has enjoyed light through the relevant windows, whether there has been any interruption, and whether anyone granted written permission for the light to pass. Twenty years of uninterrupted enjoyment is the usual threshold for a prescriptive claim, and earlier title documents sometimes grant or reserve rights expressly.
2. Commission a technical light assessment. Rights of light disputes turn on measurable loss of light, not general feelings about a darker room. A specialist surveyor can model the light levels before and after a proposed development using established methods, giving you an objective picture of whether the interference is likely to count as actionable in law.
3. Consider a Light Obstruction Notice if you are the developer. Under the Rights of Light Act 1959, a developer or landowner can register a notional obstruction as a local land charge. This functions as if a physical screen had been put up on the boundary, and it interrupts the 20-year clock that would otherwise let the neighbour build a prescriptive right.
4. Open a dialogue before litigation. Most rights of light disputes settle through negotiation, often with the developer paying a sum to release or modify the right. Early communication, supported by surveyors on both sides, tends to produce far better outcomes than positions hardened by solicitors' letters and threatened injunctions.
5. Take formal steps if agreement cannot be reached. Remedies can include an injunction to stop or cut back the development, or damages in lieu where the court considers money a fair substitute. The choice depends on the seriousness of the interference, the conduct of the parties, and the stage the building work has reached.

Common questions