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Form T383 UK: Rights of Light Tribunal Certificate

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Part ofUK Court & Tribunal Forms

Updated June 2026 · England & Wales
If a neighbouring property has enjoyed natural light through its windows for many years, that light may be protected by law. When a landowner wants to put up a building or structure that might block that light, there is a formal route to prevent the neighbour from acquiring a permanent right to it. Form T383 is the application used to ask the Upper Tribunal (Lands Chamber) to issue a certificate, which then allows a Light Obstruction Notice to be registered as a local land charge. This page walks through what the form is for, how the process fits together under the Rights of Light Act 1959, and what you need to prepare before submitting an application. It is written for landowners, developers and their advisers who are weighing up a development that might affect a neighbour's light.

What this document is

Form T383 is the application you send to the Upper Tribunal (Lands Chamber) to obtain a certificate under section 2 of the Rights of Light Act 1959. The certificate is the gateway to registering a Light Obstruction Notice against a neighbouring building in the local land charges register.

That registration has a specific legal effect: it is treated as if an actual structure of the described height and position had been built on the applicant's land, interrupting the passage of light to the neighbour's window. Why does this matter?

Under the Prescription Act 1832, a person who has received uninterrupted natural light through a defined aperture for at least twenty years can acquire a permanent right to that light. Registering a Light Obstruction Notice is a way to create that interruption on paper, without actually building anything, so that the twenty-year clock is broken.

The Tribunal's certificate confirms that appropriate notice has been given to those affected, or, in urgent cases, that a temporary notice can be registered while wider notification takes place.

How to use this document

  1. Check whether a notice is the right tool. Before filing Form T383, think carefully about whether registering a Light Obstruction Notice actually fits your situation. It is typically used where a neighbour's window is approaching the twenty-year threshold that would give them a permanent right of light. If you are unsure, take a view on the age of the neighbouring building and the likely impact of your proposed development.
  2. Gather information about the servient land. You will need to clearly identify the land you own or occupy, along with your capacity (for example, freeholder, long leaseholder, or mortgagee in possession). A plan showing the land and the position, height and dimensions of the notional obstruction is usually required. Accurate descriptions reduce the risk of the Tribunal asking for further information.
  3. Identify everyone likely to be affected. The form asks you to list the occupiers and those with a proprietary interest in the dominant building, which is the property that benefits from the light. This may include freeholders, tenants, subtenants and mortgagees. Attach a continuation page if the list is long, and take reasonable steps to check the register of title and on-site occupation.
  4. Decide whether urgency applies. The Act allows the Tribunal to direct registration of a temporary notice where the matter is one of exceptional urgency, for instance if the twenty-year period is close to expiring. If you rely on urgency, you must say so clearly on the form and be ready to explain why the ordinary notification process cannot be completed in time.
  5. Submit the application and pay the fee. Send the completed Form T383, supporting plan and any continuation pages to the Upper Tribunal (Lands Chamber), together with the applicable fee. Check gov.uk for the current amount. Once the certificate is issued, you then apply to the local authority to register the Light Obstruction Notice against the dominant property.

Common questions

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Common questions

Q What is a Light Obstruction Notice?
It is a notice registered in the local land charges register that has the same legal effect as if you had built a physical obstruction on your land at the height and position described. It is used to interrupt the period of uninterrupted light enjoyment that would otherwise let a neighbour acquire a permanent right of light under the Prescription Act 1832.
Q Why do I need a Tribunal certificate first?
The local authority will only register a Light Obstruction Notice once the Upper Tribunal (Lands Chamber) has issued a certificate confirming that the right people have been notified, or that the matter is sufficiently urgent to justify a temporary registration. Form T383 is how you ask the Tribunal for that certificate.
Q Who can apply using Form T383?
Typically the freehold owner of the servient land, a tenant holding under a long lease, or a mortgagee in possession can apply. You will need to state your capacity on the form. If your interest is less straightforward, it may be worth taking a closer look before filing, as the Tribunal will want to see a clear connection between you and the land.
Q What does 'exceptional urgency' mean on the form?
It refers to situations where there is not enough time to complete the usual notification process before the neighbour's right of light would crystallise. If the Tribunal accepts urgency, it can direct registration of a temporary notice, giving the applicant breathing space while the full process runs its course. You should be ready to explain the timing in some detail.
Q Will registering a notice stop my neighbour from claiming compensation?
Not necessarily. A Light Obstruction Notice is about preventing the acquisition of a future right of light, not about resolving an existing one. If the neighbour already has an established right of light, your development may still need to deal with that separately, potentially including compensation or design changes.
Q How long does the Tribunal process take?
Timescales vary depending on the Tribunal's workload, whether urgency is claimed, and how complete the application is. Straightforward applications can move reasonably quickly, while contested or complex cases take longer. Planning ahead and getting the paperwork right first time is usually the single biggest factor in keeping things on track.
Q Can I withdraw a Light Obstruction Notice later?
Yes, a registered notice can be cancelled or varied in certain circumstances, for example if the development no longer proceeds or if the parties reach an agreement. The cancellation is dealt with through the local land charges register. If you are thinking about this, it is worth planning the route out at the same time as the application in.
If you're dealing with this kind of situation, speak to an experienced legal adviser who can walk you through it — from £89.

Sources

This guide is based on primary UK law and official guidance.

Brad Askew, Solicitor (non-practising)

Written & reviewed by

Brad Askew Solicitor (non-practising)

Brad is on the roll of solicitors of England & Wales but does not hold a practising certificate and does not provide legal advice. LegalDocuments.co.uk is not a law firm and does not provide regulated legal advice.

Legal disclaimer
This article is for general information only. It is a tool to help you find your way — not legal advice, and not a substitute for speaking to a qualified adviser about your situation.