England · National documents
Lawful development certificates
Explains certificates establishing whether existing or proposed development is lawful, and the evidence needed for an application.
AI-generated summaries of the linked official sources; not editorially reviewed. Sources and limits
Where this document applies
England: relevance depends on the proposal, site and planning process.
Lawful development certificates (official source, opens in a new tab) · Reference ID 17c-001-20140306
A certificate answers a lawfulness question
The guidance distinguishes certificates for existing development under section 191 from proposed development under section 192. The authority applies the relevant legal tests and evidence; this process is different from deciding the planning merits of a fresh application.
Read the official source (official source, opens in a new tab) · Reference ID 17c-001-20140306
Limits and checks
- This national source does not establish the local policies, designations or site facts that apply to an individual proposal.
- Some guidance predates the August 2026 Framework and may refer to earlier policy numbering. Read it with the current Framework and any applicable transition provisions.
Read alongside this document
Put the national source in your local context
Start with the exact refusal reason. Note the policy and paragraph it cites, then check your authority’s policy summary and the facts discussed in relevant appeal decisions. Each appeal turns on its own facts and does not predict another outcome.