Certificate of Lawfulness: Proving Your Build Is Legal

What is a Certificate of Lawfulness and when do you need one? How to prove that existing or proposed development is lawful.

A Certificate of Lawfulness is a formal confirmation from the council that a specific development or use is lawful - meaning it does not require planning permission, or that the time for enforcement has passed. It is one of the most useful but least understood documents in the planning system.

Two Types of Certificate

CLEUD - Certificate of Lawful Existing Use or Development

A CLEUD confirms that an existing development or use is lawful. This is used when:

• Building work was carried out more than 4 years ago without planning permission, and no enforcement action was taken - the development is now immune from enforcement and the CLEUD confirms this
• A change of use occurred more than 10 years ago without permission - same principle
• An existing use has been continuous and the council questions its lawfulness

The council does not assess the planning merits of the development - they only consider factual and legal questions: was the development carried out? When? Has the time limit for enforcement passed? The burden of proof is on the applicant, on the balance of probabilities.

CLOPUD - Certificate of Lawful Proposed Use or Development

A CLOPUD confirms that a proposed development or use would be lawful - typically because it qualifies as permitted development. This is used when:

• You want formal confirmation that your proposed extension, outbuilding, or alteration is permitted development before you build
• A mortgage lender or solicitor requires evidence that a proposed development does not need planning permission
• You want certainty before committing to construction costs

Again, the council does not assess planning merits - they only determine whether the proposed development falls within the scope of permitted development rights.

Why Get a Certificate?

A Certificate of Lawfulness is not legally required before carrying out permitted development. But there are strong practical reasons to get one:

• Certainty - permitted development rules are complex. A CLOPUD provides legal confirmation that your interpretation is correct
• Selling your property - solicitors acting for buyers routinely check whether building work had the necessary approvals. A CLEUD or CLOPUD provides definitive evidence
• Mortgage and insurance - lenders may require evidence that work is lawful before approving a mortgage. Insurers may want confirmation before covering the building
• Protection from enforcement - once a certificate is issued, the council cannot take enforcement action against the development described in it
• Neighbour disputes - if neighbours challenge whether your development is PD, a CLOPUD settles the matter

How to Apply

The application process is straightforward:

1. Complete the application form - available on the Planning Portal or your council's website. Use the correct form (CLEUD for existing, CLOPUD for proposed)
2. Provide supporting evidence:
   • For a CLOPUD: detailed plans and drawings showing the proposed development, with a written statement explaining which PD class applies and demonstrating compliance with each condition
   • For a CLEUD: evidence of the date the development was completed or the use began - photographs, utility bills, council tax records, aerial photographs (Google Earth historical imagery), statutory declarations from witnesses
3. Pay the fee:
   • CLOPUD: same as the equivalent planning application fee (e.g. £258 for a householder application)
   • CLEUD: half the equivalent planning application fee
4. Council determination - the council must determine the application within 8 weeks (or 13 weeks for a CLEUD requiring investigation). If the council fails to determine in time, you can appeal to the Planning Inspectorate

What Evidence Is Needed for a CLEUD?

The applicant must prove, on the balance of probabilities, that the development is immune from enforcement. Useful evidence includes:

• Dated photographs - showing the development in place at the relevant time. Metadata from digital cameras or mobile phones can help establish dates
• Google Earth / aerial imagery - historical satellite images often show when a building appeared
• Council tax records - if a building was added and the council tax band changed, this can indicate when it was built
• Utility connections - records of gas, electric, or water connection to the building
• Statutory declarations - sworn statements from people with knowledge of when the development took place (neighbours, tradespeople, family members)
• Building control records - if the building had a building regulations inspection (even without planning permission), this dates the work
• Insurance records - buildings insurance that included the structure

Common Uses

• Garden buildings - confirming that a garden room or large shed is within PD limits
• Loft conversions - confirming that a loft conversion with dormers meets all PD conditions
• Extensions - particularly useful for larger rear extensions under the prior notification scheme
• Long-standing buildings - garages, workshops, or annexes that have been in place for decades without any formal approval
• Changes of use - confirming that a long-established business use or HMO use is now lawful by virtue of time

What If the Certificate Is Refused?

If the council refuses to issue a certificate, you have the right to appeal to the Planning Inspectorate. The appeal process is similar to a planning appeal - you submit written representations explaining why the council's decision is wrong.

Common reasons for refusal include:

• Insufficient evidence to prove the 4-year or 10-year period
• The development does not comply with PD conditions (for CLOPUD)
• The council has evidence that the time period has not been continuous (e.g. the building was demolished and rebuilt within the 4-year period)

Tips

1. Apply for a CLOPUD before building - for significant PD projects (large extensions, outbuildings near boundaries, loft conversions), the fee is modest and the certainty is invaluable
2. Gather evidence early - if you are buying a property with unauthorised development, collect evidence of the timeline before completion
3. Don't assume immunity - deliberately concealing a breach can reset the enforcement clock. The Localism Act 2011 allows councils to take action against concealed breaches regardless of the time limit
4. Keep your certificate - store it with your property deeds. Your solicitor will need it when you sell