- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 27 Apr 2018
Light obstruction notice
Rights to light refer to rights to receive sufficient light through an opening (such as a window), allowing ordinary comfortable use and enjoyment of a dwelling, or ordinary beneficial use and occupation of other buildings. Generally, rights to light are acquired by prescription where the light has been enjoyed for 20 years.
Rights to light can become an issue when a new development, or proposed development affect the access to light of an adjoining property. Rights to light also apply to obstructions caused by trees, hedges and so on, but there are no rights to light for open ground.
Rights to light are attached to the land and so can perpetuate even if a new building is constructed. It cannot be assumed that no rights to light exist simply because neighbouring buildings appear to be new.
See Rights to light for more information.
It is possible to prevent rights to light being acquired by creating a continuous obstruction to the light for 12 months, starting before 19 years enjoyment of the light has accumulated. However there is obviously considerable risk to doing this.
Alternatively, Light Obstruction Notices (LON) can be registered under the Rights of Light Act 1959, even where no obstruction has actually been created yet. If the notice is not challenged within a year the notional infringement of the enjoyment of the light can be considered to have been accepted, the rights defeated, and the 20-year clock ‘reset’.
Notice of LON’s must be given to affected parties in a way determined by the Lands Tribunal and LON’s must be registered with the local authority on the Local Land Charges Register. Applications for registration should include:
- An application form.
- A plan showing the location of the property enjoying the light and the proposed obstruction.
- A Lands Tribunal certificate confirming that appropriate notices have been given to affected parties.
If the LON remains valid for a year, then any accruing rights are defeated.
LONs can be challenged if an affected party can demonstrate that they have had enjoyment of the light for 20 years. They can either be challenged or negotiated directly with the applicant, or challenged through the courts, and this may result in cancelling or altering the notice.
LON's are a relatively inexpensive way of defeating rights, and can be used even if it is only suspected that there may be rights, simply to identify potential claims.
If the applicant can demonstrated to the Lands Tribunal that the application is urgent, an expedited process may be adopted, and a temporary certificate given, which is followed later by the definitive certificate.
 Find out more
 Related articles on Designing Buildings Wiki
Featured articles and news
BSRIA calls on government to reach deeper into the causes of pollution.
George Demetri brings a whole new level of technical knowledge to Designing Buildings Wiki.
Quality professionals need to take an active role in driving the completion process forwards.
The innovations needed to move from rhetoric to realisation.
Creating a sense of place, with radically-low running costs and the highest comfort levels.
A conversation between David Mitchell and Caitlin DeSilvey.
A quick guide to brick sizes.
The Union Street development in Southwark was a passion, as well as a business endeavour.
Do our water quality standards demonstrate to the public that their supply is clean?
A third of practitioners do not have easy access to the knowledge they need.
Sustainable approaches to relief, recovery and reconstruction after a natural disaster.
An introduction to a complex issue, the legal status of which remains unclear.