Certificate of Lawfulness: When & Why You Need One
A Certificate of Lawfulness (CLPUD) is a legal document confirming that your proposed extension falls within Permitted Development rights. It is not planning permission — it is proof that you do not need it. And it is one of the most important documents you will need when you sell your home.
What it is
What it is
A Certificate of Lawful Proposed Use or Development (CLPUD) confirms that the proposed work is lawful — either because it falls under Permitted Development or because it does not constitute 'development' under planning law. It is a positive statement from the council that the work is legal.
Why you need one
When you sell your home, the buyer's solicitor will ask for proof that any extensions were built legally. Without a certificate, they may require an indemnity insurance policy (which has limitations) or raise enquiries that delay the sale. A certificate provides definitive proof.
How to apply
The application includes: existing and proposed floor plans and elevations, a site plan, a compliance statement explaining how the proposal meets PD conditions, and the application fee (£129 — half the planning application fee). The council targets 8 weeks for a decision. We handle the full application for £1,500.
Common questions
Frequently asked questions
Extension guides
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What is a Certificate of Lawfulness, when you need one, how to apply, and why it protects you at resale. Complete guide for homeowners.
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