For many property owners, the passage of time can offer a route to regularising unauthorised development or changes of use. Whether it is a converted annex, an extended outbuilding, or a long-running breach of condition, a Certificate of Lawfulness of Existing Use or Development (CLEUD) can provide certainty and protection from enforcement action.
However, unlike a standard planning application, successfully securing a CLEUD does not depend on planning merit, but on satisfying specific legal tests through quality, consistent and credible evidence.
In addition, since legislative changes were introduced in April 2024, applicants must now generally demonstrate ten years of continuous use, rather than four – making rigorous record-keeping for an entire 10-year period more critical than ever.
This article outlines the key legal tests, common pitfalls and practical steps property owners should take to maximise the prospects of securing a lawful development certificate.
Understanding the burden of proof
In a standard planning application, the Local Planning Authority (LPA) weighs up the merits of an application, balancing policy considerations, potential harm and public benefits.
A CLEUD application is fundamentally different. The burden of proof rests entirely with the applicant, who must demonstrate that the breach of planning control has occurred continuously for the required period and has therefore become lawful through the passage of time.
Importantly, the test is not ‘beyond reasonable doubt’. Applicants must show, on the balance of probability, that continuous use is more likely than not. Where evidence is ‘precise and unambiguous’ and the LPA has no evidence to the contrary, there is no sound basis for refusal.
The distinction is crucial – a CLEUD is not about whether the LPA considers the development acceptable in planning terms, but whether sufficient evidence exists to establish lawfulness.
From 4 years to 10 years
Historically, it was only required to demonstrate 4-years of continuous breach in some circumstances. This applied to the creation of new dwellings and physical building works.
However, as of 25 April 2024, applicants must now demonstrate 10 years of continuous use before lawful status can be established.
There are limited transitional arrangements for developments that were substantially completed before 25 April 2024, but the 4-year rule is rapidly becoming a thing of the past. For most current and future breaches, the evidential requirement is now a full decade.
Demonstrating continuous use
One of the most common challenges in CLEUD applications is demonstrating continuous use over the relevant period.
If a use ceases, the ‘immunity clock’ can reset, meaning that the 10-year threshold has not been achieved. However, case law does recognise some flexibility for “de minimis” gaps. Continuous use does not necessarily require continuous occupation in every circumstance.
For example, short gaps between tenancies or brief periods where a property is temporarily vacant may not automatically defeat an application. High Courts have accepted that some activities, particularly of works to further the breach such as redecoration, may help demonstrate a continuous breach during limited vacant periods.
The Covid-19 pandemic also created unusual circumstances. Temporary interruptions caused by lockdowns or wider market conditions may not be fatal where the wider evidence demonstrates that the breach itself continued uninterrupted.
In a recent case, we successfully demonstrated that a breach of condition had been continuous for the requisite 10-year period despite a longer Covid-related vacancy. The application succeeded because the broader factual history clearly evidenced an ongoing and established use.
Ultimately, what constitutes a ‘de minimis’ gap will always depend on the specific facts of the case. This is why maintaining robust evidence throughout the breach period is so important.
It’s all about the evidence
The success of the case mentioned above hinged on having a paper trail dating back to July 2007. Without signed tenancy agreements, bank statements and statutory declarations from previous tenants, the application may have failed on the balance of probabilities.
If you are currently relying on the passage of time to regularise a breach of planning – whether it is an unauthorised annex, a business running from a garage, or a breach of condition – maintaining clear records is essential.
Useful forms of evidence may include:
- Statutory declarations
- Signed tenancy agreements
- Dated photographs
- Bank statements
- Dated trade invoices and receipts
- Utility bills
- Council tax or business rates documentation
- Correspondence relating to the use or occupation of the property
Key Takeaway
Securing a Certificate of Lawfulness is ultimately an evidence-led process. With the transition from the former 4-year rule to the more demanding 10-year requirement, maintaining detailed records has never been more important.
For property owners currently relying on the passage of time to regularise development, proactive record keeping and early professional advice can make the difference between securing lawful status and facing potential enforcement action. If you would like advice or assistance with a Certificate of Lawfulness application, please feel free to get in touch.
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