Can You Still Claim Rights of Light After a Building Is Built?

By RightsOfLight.org.uk · 29 May 2026

One of the most common questions property owners ask is whether they have missed the boat. A neighbouring development has gone up, your rooms are noticeably darker, and you are wondering if there is anything you can do about it now. The short answer is yes, you can still bring a rights of light claim after construction is complete. But the practical reality is more nuanced than that, and understanding the differences matters.

A right of light is a legal right that typically arises after 20 years of uninterrupted enjoyment of natural light through a defined aperture, usually a window. This right is rooted in the Prescription Act 1832 and exists independently of planning permission. So even if the developer had full planning consent, that does not extinguish your private legal right to light. These are two entirely separate regimes.

The key thing that changes after construction is the range of remedies available to you. Before a building goes up, a court can grant an injunction to prevent construction or require design changes. This is a powerful tool because it gives the property owner serious leverage in negotiations. Once the building is finished, however, courts are far less likely to order a mandatory injunction requiring demolition or partial removal of the new structure. It is not impossible, but it is rare. The leading authority on this point is Coventry v Lawrence [2014], in which the Supreme Court considered the circumstances under which damages should be awarded instead of an injunction.

In most post-completion scenarios, the court will award negotiating damages. This is sometimes called "release fee" compensation. The idea is to put you in the position you would have been in if you had negotiated a release of your right of light before construction started. The court looks at what a willing buyer and willing seller would have agreed, often calculated as a share of the developer's profit attributable to the part of the building that infringes your light.

There is also a tactical dimension worth understanding. Developers sometimes rush to complete construction precisely because they know that a finished building shifts the balance away from injunctions and towards damages. This was addressed in Regan v Paul Properties [2006], where the Court of Appeal confirmed that a developer who builds in the knowledge of a neighbour's rights cannot simply pay their way out with damages. The court will look at whether the developer acted in good faith or tried to present the court with a fait accompli.

If you find yourself in this situation, timing still matters even after the building is complete. Limitation periods apply. Under the Limitation Act 1980, you generally have six years from the date of the infringement to bring a claim. Waiting too long can weaken your position, both legally and in terms of negotiation leverage.

You should also be aware that a rights of light surveyor can still carry out a daylight assessment after the building is up. They will typically use a Waldram diagram or equivalent daylight modelling technique to measure how much light you have lost and whether the reduction crosses the threshold that the courts recognise as actionable. The conventional test is the "50/50 rule," which asks whether at least half of your room, measured at table height, still receives adequate natural light.

So while the strongest position is always to act before construction begins, a post-completion claim is far from hopeless. Many claims are brought and settled successfully after a development is already standing. The remedy shifts from "stop the building" to "compensate me fairly," but that compensation can still be substantial, particularly in high-value urban locations where developer margins are significant.

Reference: Prescription Act 1832; Coventry v Lawrence [2014] UKSC 13; Regan v Paul Properties [2006] EWCA Civ 1319; Limitation Act 1980