The most important daylight story of the past year was decided in a courtroom, not a planning committee. In Cooper & Powell v Ludgate House Limited [2025] EWHC 1724, the High Court awarded record rights to light damages against a completed London office building — but refused to order its demolition. For anyone designing, objecting to or assessing schemes in 2026, the ruling changes the risk calculation around daylight and neighbouring amenity.
This post explains what a rights to light claim is, how it differs from the daylight and sunlight assessment you submit with a planning application, and why the Bankside decision matters for developers and their neighbours alike.
Rights to light versus a daylight report
These two things are constantly confused, so it is worth being precise. A right to light is a private legal easement — a property right that a window can acquire, usually after 20 years of uninterrupted light under the Prescription Act 1832. If a new building substantially reduces that light, the affected owner can sue for an injunction or damages. It is a matter for the courts, measured using the Waldram method and the long-standing “50/50 rule” for adequately lit rooms.
A daylight and sunlight assessment, by contrast, is a planning document. It tests a scheme against the Building Research Establishment guidance (BRE BR 209, 2022 edition) using metrics such as Vertical Sky Component, No-Sky Line and Annual Probable Sunlight Hours. Passing the BRE tests helps you win consent; it does not extinguish a neighbour’s separate legal right to light. Our explainer on right to light versus a daylight report unpacks the distinction in full.
What the court actually decided
The dispute concerned Arbor, a 19-storey office building completed in 2022 as part of the £1bn Bankside Yards regeneration on London’s South Bank. Two sets of flat owners at Bankside Lofts argued the new tower injured the light to their homes. The judge agreed there was an actionable injury — but declined to grant an injunction, one of the first significant cases in years to refuse one.
The court weighed the public interest, harm to third parties and the practical futility of an order: the London Borough of Southwark had agreed to use its powers under section 203 of the Housing and Planning Act 2016 to protect the wider development, so demolition would have achieved little. Instead the judge awarded negotiating damages — £350,000 to one claimant and £500,000 to the other, understood to be the highest ever award in a rights to light case. Rather than the usual one-third share of developer profit, the court settled on a 12.5% “profit pot” split between affected neighbours, reflecting the scheme’s risk.
Why 2026 developers should still take daylight seriously
It would be easy to read the case as good news for developers — injunctions are harder to obtain and demolition is unlikely. That reading is dangerous. The award confirms that courts will put a very large price on lost light where a developer proceeds without settling. Six- and seven-figure damages, plus legal costs and years of uncertainty, are a poor substitute for early assessment.
The planning system is moving the same way. The December 2025 draft revisions to the National Planning Policy Framework push higher-density housing while keeping daylight, sunlight and neighbour amenity as a core design test, and the Mayor’s 2026 housing design guidance still leans on London Plan Policy D6. In dense urban sites the two regimes now bite together: you must satisfy the planners on BRE grounds and manage private rights to light exposure. Our guide to daylight and sunlight for tall buildings and our note on London Plan daylight standards in 2026 set out the planning side in detail.
Practical steps for schemes at risk
If your project rises near existing residential windows, three actions reduce risk. First, commission a daylight and sunlight assessment early, at massing stage, so the design can flex before it is fixed. Second, obtain a separate rights to light appraisal where neighbouring windows may have acquired an easement — the planning report will not cover this. Third, where an injury is identified, negotiate and, if appropriate, insure or settle rather than build and hope. The Ludgate House damages show what “build and hope” can cost.
For neighbours and objectors, the case is a reminder that a genuine loss of light has real value even when the building is already up — but that the courts increasingly prefer compensation to demolition, so early legal advice matters.
How Fortress Associates can help
Fortress Associates prepares BRE 2022 and BS EN 17037 daylight and sunlight reports for planning applications across the UK, typically within four to five working days and with no advance payment. We assess VSC, NSL and APSH for your scheme and neighbouring properties, flag where amenity is at risk, and set out mitigation before your design is locked in. If you are unsure whether your project needs a report, get in touch or see our full range of planning services. Note that a planning daylight report is distinct from a formal rights to light easement appraisal, which is a legal matter.
Sources & further reading
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