How Insurance Policies Affect Developer Decisions on Rights of Light

By Stephen Buchanan · 7 September 2026

When a developer plans a new building that could block light to neighbouring properties, one of the biggest behind-the-scenes decisions involves insurance. Rights of light insurance is a specialist product that developers frequently rely on to manage the financial risk of claims. But how does this insurance actually work, and what does it mean for property owners whose light might be affected?

Rights of light insurance is typically taken out by a developer before construction begins. The policy covers the cost of potential claims from neighbours whose light the new building may obstruct. In simple terms, the developer pays a premium upfront and the insurer agrees to handle any compensation payments or legal costs that arise. This allows the developer to press ahead with construction while transferring the financial risk to an insurance company.

From the developer's perspective, insurance changes the calculation significantly. Without a policy, a developer faces the prospect of an injunction that could halt or even reverse construction. With insurance in place, the developer has already accepted that some claims may come forward and has budgeted accordingly. This is one reason why developers sometimes seem willing to build quickly, even when they know neighbours have potential claims. Speed matters because courts are far less likely to grant an injunction once a building is complete. If you want to understand what a right of light is and how it can be infringed, that context is essential for understanding why timing plays such a central role in the insurance strategy.

For property owners, the existence of an insurance policy does not remove or reduce your legal rights. You still have the same entitlement to natural light through your windows that the Prescription Act 1832 protects. What insurance does change is the practical dynamic of any dispute. If a developer has insurance, the insurer often takes charge of settlement negotiations. Insurers are experienced at handling these claims and will typically aim to settle for the lowest reasonable amount. They have their own surveyors and legal teams.

This is where things can get tricky. Insurers may approach you with a settlement offer that sounds reasonable but actually undervalues your claim. Understanding how compensation is calculated puts you in a much stronger position when responding to any offer. Compensation in rights of light cases often reflects a share of the developer's profit attributable to the obstruction of your light, not just the reduction in your property's market value. If you accept a low offer without professional advice, you could be leaving significant money on the table.

One detail that catches many people off guard is that insurance policies often contain a "non-approach" condition. This means the developer and their advisers cannot contact affected neighbours before construction, because doing so might alert them to the claim and trigger an injunction application before the building goes up. If a developer has been unusually quiet about a nearby project, insurance with a non-approach clause could be the reason. Once construction is underway or finished, the insurer then steps in to deal with claims reactively.

Some developers choose not to insure and instead negotiate directly with affected neighbours before building. This approach can be more transparent and sometimes leads to better outcomes for property owners, because the developer has a stronger incentive to agree fair terms to avoid delays. If you receive a letter from a developer about your light, you should take it seriously regardless of whether insurance is involved. Reading up on your legal rights as a property owner will help you understand what protections you have.

It is also worth knowing that insurance does not protect a developer against every outcome. Most policies exclude situations where the property owner was already aware of the potential claim before the policy was taken out, or where the developer failed to carry out adequate due diligence. Courts have also shown willingness to grant injunctions in cases where the interference with light is severe, regardless of insurance arrangements. The decision in Coventry v Lawrence [2014] confirmed that a defendant cannot simply buy the right to infringe by having deep pockets or an insurance policy.

If you think a new development is affecting or will affect the light to your property, acting early gives you the most options. You can request a free assessment to find out where you stand before a developer's insurance strategy limits your leverage. Whether or not a developer has insured, your right to adequate light through long-established windows remains a legally enforceable property right.

Reference: Prescription Act 1832; Coventry v Lawrence [2014] UKSC 13