Certificate of Lawfulness Secured from Croydon for an Outbuilding Used as a Dwelling
Certificate of Lawfulness from the London Borough of Croydon confirming the continuous use of an outbuilding in South Croydon as a self-contained residential dwelling for over four years.
COL APPROVALSCROYDONLONDON
Andrew Ransome
7/25/20262 min read
In 2025, the London Borough of Croydon issued a Certificate of Lawfulness confirming that an outbuilding in South Croydon had been in continuous use as a self-contained residential dwelling for more than four years, making the use lawful under the four-year rule.
I assembled and presented a comprehensive evidence package that met the balance of probability standard required.
4 Year Rule Used in Croydon to Establish Continued Use as Dwelling
I secured a Certificate of Lawfulness from the London Borough of Croydon for a client whose outbuilding in South Croydon had been converted and used as an independent residential dwelling without planning permission.
The Certificate confirms that the use is now lawful under Section 191 of the Town and Country Planning Act 1990 — immune from enforcement action and eligible for formal legal recognition.
The four-year rule is a well-established principle in planning law. Where a building had been in continuous use as a single dwellinghouse for four years without enforcement action, that use becomes lawful by operation of statute.
Assembling the evidence is the critical task.
I worked closely with the client to gather and organise the documentation needed to demonstrate continuous occupation throughout the relevant period.
A clear legal commentary accompanied the application, explaining the applicable statutory provisions, citing relevant case law.
The London Borough of Croydon accepted the evidence and issued the Certificate.
Planning Application Advice
If an outbuilding or converted building on your property has been in residential use, a Certificate of Lawfulness is the route to regularising its status. Contact me to discuss your situation.
Andrew Ransome MRTPI - Email: andrew@andrewransome.co.uk
About me
Andrew Ransome is a Planning Director and a Chartered Member of the Royal Town Planning Institute (RTPI), with more than two decades of experience in town planning.
He specialises in delivering strategic planning solutions for complex developments across both rural and urban environments, helping clients navigate planning challenges and unlock development opportunities. Connect with Andrew on Linkedin.
Certificate of Lawfulness Successes
Permitted Development Information
Get in touch for planning advice: Email: andrew@andrewransome.co.uk
© 2026. All rights reserved.