How Timing Affects Your Rights of Light Claim: Before and After Construction

By Neil Goddard · 19 August 2026

The timing of your rights of light claim matters enormously. Whether a development is still on the drawing board, partly built, or fully complete changes your leverage, the remedies available to you, and the likely outcome. This is one of the most misunderstood aspects of rights of light law, and getting the timing wrong can cost you tens of thousands of pounds.

If you learn about a proposed development before construction begins, you are in the strongest possible position. At this stage, you can seek an injunction to prevent the building work from going ahead. Courts are far more willing to grant injunctions before a developer has spent millions on construction. The threat alone often brings developers to the negotiating table quickly. If you understand what a right of light is and can demonstrate that the proposed building would substantially interfere with your light, a developer will usually prefer to negotiate rather than risk having the project blocked entirely.

During the planning stages is also when developers tend to send out letters to neighbouring property owners. These letters often downplay the impact or offer modest sums in exchange for a deed of release. Many people sign these without realising their claim might be worth considerably more. The pre-construction phase is when your bargaining power peaks, because the developer needs your cooperation to proceed without legal risk.

Once construction is underway, the picture shifts. Courts become more reluctant to grant injunctions that would require partially completed work to be torn down, though they can still do so in appropriate cases. The leading authority here is Shelfer v City of London Electric Lighting Co (1895), which set out the circumstances where damages might be awarded instead of an injunction. More recently, the Supreme Court in Coventry v Lawrence (2014) confirmed that courts have broad discretion in deciding between injunctions and damages, but emphasised that property rights should not be overridden lightly.

If a building is already complete, you can still bring a claim. Many people assume it is too late once the bricks are up, but that is not the case. You can pursue damages for the interference with your light, and in rare circumstances a court might still order demolition or modification. However, your practical leverage is reduced. A developer who has already finished and sold units has less commercial pressure to settle generously. The calculation of damages also changes, because the court looks at what a willing buyer and willing seller would have agreed before the infringement, not at the diminution in your property value. You can find out more about how compensation is calculated in these situations.

The limitation period for bringing a rights of light claim is six years from when the interference began. This means six years from when the offending building was substantially complete and actually blocking your light. If you miss this window, your claim is statute-barred. So while you do not need to rush, you should not sit on your hands either.

From a practical standpoint, acting early almost always produces better results. If you have received notice of a proposed development or spotted a planning application nearby, getting professional advice quickly is sensible. A rights of light surveyor can assess the potential impact using daylight modelling, and a solicitor can advise on the strength of your position. If you are unsure about whether you can make a claim, getting an initial assessment done costs nothing in most cases and gives you clarity.

One common mistake is waiting until you actually notice the light reduction in your room. By that point, the development may be nearly finished and your strongest negotiating window may have closed. The lesson is straightforward: the earlier you engage with the process, the more options you have and the better your likely outcome.

Timing also affects costs. Pre-construction claims that settle through negotiation are far cheaper to resolve than post-completion disputes that end up in court. If you want practical guidance on next steps, acting promptly is the single best thing you can do to protect your position and keep costs proportionate to the value of your claim.

Reference: Shelfer v City of London Electric Lighting Co [1895] 1 Ch 287; Coventry v Lawrence [2014] UKSC 13; Limitation Act 1980, s.2