An evidence checklist for a lawful development certificate

A lawful development certificate succeeds or fails on the evidence the applicant puts in, because the burden of proof sits with you and the council is not required to produce anything to the contrary. The standard is the balance of probabilities, so you have to show that your version is more likely than not. Lawful development certificate evidence that is precise, dated and internally consistent will carry an application even where the council starts out sceptical. Vague recollection will not.

Applications under sections 191 and 192 of the Town and Country Planning Act 1990 are decided as questions of fact and law, so planning merits play no part. An officer who thinks the use is unacceptable still has to grant the certificate if the evidence is made out.

Existing and proposed certificates compared

Section 191 deals with what already exists: a use, an operation or a breach of condition that has become lawful through the passage of time, or that never needed permission. Section 192 deals with something you propose to do and asks whether it would be lawful.

The evidence differs completely. A section 192 application is an argument about the meaning of the General Permitted Development Order or the Use Classes Order applied to a set of drawings. A section 191 application is a history, and histories need witnesses and documents.

Fees differ too, so take the figure from the current published schedule rather than assuming one is half the other.

Burden of proof and the standard applied

The applicant carries the burden. The council does not have to disprove your case, and an absence of council records is not evidence in your favour.

The standard is the balance of probabilities rather than anything higher. And the applicant's own evidence can be enough on its own, provided it is sufficiently precise and unambiguous and there is nothing to contradict it. That principle does real work in practice, because many long-standing uses leave very little paper behind.

What defeats applications is not thin evidence so much as inconsistent evidence. A declaration saying the annexe was occupied continuously from 2012, filed alongside a council tax record showing a single dwelling until 2016, hands the council its refusal.

Time limits and which period applies

For a section 191 application relying on time, the period matters more than anything else.

The Levelling-up and Regeneration Act 2023 moved England to a single ten year time limit for taking enforcement action, in force from 25 April 2024 and applying to breaches from that date. Breaches that had already become immune under the earlier four year rule for operational development and for change of use to a single dwellinghouse are not reopened by the change. Work out which regime your breach falls under before you draft anything, and say so explicitly in the application, because the answer determines how many years of evidence you need.

Continuity is the other half of the test. The period has to be unbroken, and a gap of several months in the middle of it is the single most common reason a certificate is refused.

Documentary evidence that carries weight

Rank your evidence before you collect it. Contemporaneous documents created for another purpose carry far more weight than anything written for the application.

Strong material includes council tax records and banding history, utility bills showing separate supply and consumption, tenancy agreements and rent books, electoral roll entries, business rates records, HM Land Registry entries, insurance policies and claims, invoices from builders and suppliers with dates, delivery notes, VAT returns and accounts for a business use, school registration addresses, and dated correspondence with the council or with utility providers.

Weaker material includes undated photographs, general recollection, marketing particulars, and anything produced after the dispute arose. It still helps, but it will not carry the case alone.

Build a chronology. One table with a row per year, a column for what happened and a column naming the document that proves it, does more for an application than a folder of loose papers.

Statutory declarations and who can give them

A statutory declaration made under the Statutory Declarations Act 1835, sworn before a solicitor or commissioner for oaths, is the standard way to put personal evidence before the council.

Good declarations are specific. They say who the declarant is, how they know the facts, what they observed, and when, with dates as precise as memory allows. They avoid conclusions of law, so a declarant should describe the property being occupied as a separate home rather than asserting that a lawful residential use existed.

Get declarations from more than one source. The applicant, a former tenant, a neighbour who has lived opposite throughout, a tradesperson who worked on the building and an accountant who prepared the business accounts together produce a picture no single declaration can. Where a declarant only knows part of the period, say so rather than stretching them.

Photographs, bills and their dating

Photographs are persuasive when they can be dated and located, and worthless when they cannot.

Use images with reliable metadata, printed dated photographs, photographs that include a datable object such as a registration plate or a newspaper, or images from dated third party sources such as historic aerial photography and street imagery archives. Say in the application how each image is dated.

Utility bills should show consumption rather than a standing charge alone, because an empty building still has a meter. Council tax records showing a separate band, and the date a band was created, are among the strongest single documents for a residential use case.

Common gaps that cause refusal

Six recur.

A gap in the period with no evidence at all. Evidence that starts well but thins out in the most recent years. Declarations that describe the situation today rather than throughout the period. An inconsistency between the declarations and the documents. A red line that does not match the area the evidence covers. And a description of the development that does not match what the evidence proves, which is fatal even when the underlying facts are good.

Draft the description last, once you know what the evidence supports, rather than first. A Planning Statement setting out the legal test, the chronology and the evidence against each element of the test makes the officer's job straightforward, and straightforward applications get decided faster.

Appealing a refusal on the evidence

An appeal against refusal of a certificate goes to the Planning Inspectorate under section 195, and it is reheard as a question of fact and law rather than as a planning judgement.

New evidence can be introduced at appeal, which is worth knowing if a document surfaces late. Cross-examination is available at an inquiry where declarations are disputed, and a declarant who will not attend is worth less than one who will. Appeals on evidence succeed reasonably often where the applicant has filled the gap that caused the refusal, so read the decision notice carefully and answer it directly.

Where a certificate is refused and you fall back on a full planning application, the submission changes shape entirely. The question becomes one of planning merits rather than fact, and a Design and Access Statement may then be required alongside the usual drawings.

But assemble the file before you apply. Evidence gathered under appeal deadlines is always worse than evidence gathered calmly.

This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it.

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