Can You Lose a Right of Light? Abandonment, Obstruction and Release

By Margaret Shields · 22 August 2026

Once a right of light has been established over your property, many people assume it lasts forever. That is not always the case. There are several ways a right of light can be lost, and understanding these is essential if you own property that benefits from natural light through long-standing windows or apertures.

The most common way a right of light is extinguished is by express release. This happens when the property owner signs a deed giving up the right, usually in exchange for compensation. Developers frequently seek these releases before starting construction projects, and if you sign one, the right is gone permanently. You should always take professional advice before agreeing to release any right, and you can find practical guidance on next steps if a developer has approached you.

Abandonment is often raised as a defence in rights of light disputes, but it is actually very difficult to prove. Simply not using a room, or even boarding up a window temporarily, does not automatically mean you have abandoned your right. The courts require clear evidence that the property owner intended to give up the right permanently. In Moore v Rawson (1824), the court held that removing a window and bricking up the wall could amount to abandonment, but only where the circumstances showed a genuine intention never to use that aperture again. Merely leaving a window shuttered or covered for a period of years will not usually be enough.

Another route to losing a right of light is through statutory extinguishment under the Rights of Light Act 1959. This allows a developer to register a light obstruction notice with the Upper Tribunal, which has the same legal effect as if a physical obstruction had been erected. If the property owner does not challenge the notice within a year, the right of light can be defeated. This is a deliberate tactic used by developers, and if you receive one of these notices, the clock starts ticking immediately. You can read more about your legal rights as a property owner in these situations.

A right of light can also be lost if the dominant building is demolished and not rebuilt within a reasonable time. The right attaches to the building and its apertures, not to the land itself. So if your building is knocked down and you wait many years before rebuilding, a court may find the right has been extinguished. However, there is no fixed time limit in law, and each case turns on its own facts.

It is worth distinguishing between losing a right entirely and having it reduced. If your neighbour builds something that partially blocks your light but does not reduce it below the threshold of adequate illumination, you may not have a claim for that specific interference. But the underlying right still exists. If a future development then pushes your light below the adequate level, you would still be able to bring a claim at that point. Understanding what a right of light is and how it works in practice helps clarify this distinction.

One scenario that confuses people is where planning permission has been granted for a neighbouring development. Planning consent does not extinguish your private legal rights. A developer can have full planning approval and still be liable for infringing your right of light. These are entirely separate legal regimes.

Finally, unity of ownership can extinguish a right of light. If one person comes to own both the dominant property (yours) and the servient property (the one that must not obstruct your light), the easement merges and ceases to exist. If the properties are later separated again, the right does not automatically revive. A new 20-year period of enjoyment under the Prescription Act 1832 would need to begin.

If you are concerned that your right of light may be at risk, whether through a developer's actions, a neighbour's construction plans, or a notice you have received, you can request a free assessment to understand where you stand. Acting quickly is often the key to preserving rights that might otherwise be lost through delay or inaction.

Reference: Rights of Light Act 1959; Prescription Act 1832; Moore v Rawson (1824) 3 B & C 332