Certificate of Lawfulness, When to Apply and What Protection It Gives
A Certificate of Lawfulness provides legal certainty that a development or use is not at risk of planning enforcement. This guide explains the two types, when to apply, and how it protects buyers and sellers.
Published: 16 Mar 2026 · Updated: 16 Mar 2026 · 5 min read
What is a Certificate of Lawfulness?
A Certificate of Lawfulness (also known as a Lawful Development Certificate or LDC) is an official document issued by a Local Planning Authority (LPA) confirming that a specific development, use, or operation is lawful for planning purposes. It does not grant planning permission, it confirms that planning permission is not required, or that the time limit for enforcement action has expired.
There are two types:
- **CLEUD (Certificate of Lawfulness of Existing Use or Development)**, confirms that an existing use or development is lawful, typically because enforcement time limits have passed
- **CLOPUD (Certificate of Lawfulness of Proposed Use or Development)**, confirms that a proposed development would be lawful (most commonly used to confirm that works fall within permitted development rights)
When Should You Apply?
| Situation | Certificate type |
|---|---|
| Extension built without permission more than 4 years ago | CLEUD |
| Change of use (not to a house) made more than 10 years ago | CLEUD |
| Breach of planning condition more than 10 years ago | CLEUD |
| Proposed extension you believe is permitted development | CLOPUD |
| Proposed change of use you believe needs no permission | CLOPUD |
| Selling a property where an undocumented change was made | CLEUD |
A CLOPUD provides certainty before you invest in construction. A CLEUD provides documentary evidence that existing works or uses are immune from enforcement action.
The Application Process
Applications are made to the relevant LPA, most conveniently via the Planning Portal. There is an application fee (currently set by the Ministry of Housing Communities & Local Government, check the current fee schedule before submitting). The LPA must determine the application within eight weeks.
For a CLEUD, you must demonstrate on the balance of probability that the relevant time limit has been satisfied. Evidence typically includes:
- Statutory declarations from the current and previous owners
- Builder invoices and contracts with dates
- Dated photographs
- Historic aerial imagery
- Council tax or utility records showing continuous occupation in the relevant use
For a CLOPUD, you must demonstrate that the proposed works fall within the relevant permitted development class set out in the Town and Country Planning (General Permitted Development) (England) Order 2015 (as amended).
What Protection Does a Certificate Give?
A certificate issued by the LPA is conclusive evidence for planning purposes that the use or development described in it was lawful at the date of the application. It cannot be revoked. It is registered at the LPA and binds all future owners of the land.
For sellers, a certificate resolves a significant uncertainty that might otherwise cause buyers to reduce their offer or withdraw. For buyers, it removes the risk of having to demolish works or cease a use after completion. Most mortgage lenders and conveyancers will accept a certificate as sufficient comfort in lieu of the relevant planning permission.
Limitations to Be Aware Of
A certificate only covers the specific use or works described in the application, it does not provide a blanket clearance for other aspects of the property. It also does not override other legal consents that may be required, such as listed building consent, building regulations approval, or any restrictive covenant in the title deeds. Property Passport UK records planning data linked to properties, giving buyers an early indication of planning history before formal searches are ordered.
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