A Lawful Development Certificate is the most underused tool in UK planning. Most people who build under permitted development never apply for one — and then find themselves in difficulty when they sell, when a buyer is refused a mortgage, or when an enforcement officer questions works that happened years ago.
CLUD (Certificate of Lawful Use or Development — proposed): confirms that a proposed project would be lawful. Applied for before starting work. CLEUD (Certificate of Lawful Existing Use or Development): confirms that an existing use or completed development is lawful — either because it was permitted when carried out, or because the time limit for enforcement has expired. Applied for after the fact.
You want certainty that your planned project is permitted development before starting. The project is borderline and you want formal confirmation. You are planning to sell and want to evidence the lawfulness of proposed works. Your mortgage lender requires confirmation. A planning condition is ambiguous and you want the council to confirm your interpretation.
Works were carried out under permitted development but you have no formal record. A use of land has been established for the relevant period. You are selling a property where previous works may be questioned by buyers or their solicitors. A previous owner carried out works without planning permission and the time limits have passed. You want to regularise an existing use before any enforcement action is threatened.
A CLEUD based on 10 years\' continuous use requires evidence of when the breach began (a specific date), that the breach continued without substantial interruption, and that the ten-year period was complete before any enforcement notice was issued. The evidence standard is the balance of probabilities. Useful evidence includes utility bills, council tax records, electoral roll entries, delivery records, dated photographs, and properly sworn statutory declarations. Personal statements without corroboration carry limited weight.
Submit the application form with evidence and the fee (£258 for householder equivalent). The council has 8 weeks to decide. If granted, the LDC runs with the land permanently. If refused, you can appeal to the Planning Inspectorate. The most common mistake is not applying at all. A CLEUD refused for insufficient evidence is not a bar to reapplying with better evidence — but it signals to the council that the lawfulness of the use has been questioned. A CLEUD withdrawn before a decision also appears in the planning history.
Standard searches check the public register. We go further — querying live portals, blocked legacy systems, pre-merger authority databases, committee PDF archives, Land Registry title constraints, and comparable decisions across your postcode cluster. What we retrieve determines what you know before you build, buy, or appeal.