Statutory declarations for a lawful development certificate

A lawful development certificate application under section 191 of the Town and Country Planning Act 1990 is won or lost on evidence, and the statutory declaration is the spine of that evidence. The burden of proof sits entirely with the applicant, the standard is the balance of probabilities, and national guidance is clear that where the applicant's evidence is sufficiently precise and unambiguous, and the authority has nothing to contradict it, the applicant is entitled to the certificate.

Precise and unambiguous is the test. Most refused applications fail because the declaration is vague about dates, not because the use was not happening.

What the application has to prove

Two sections do different jobs. Section 191 certifies that an existing use, operation or activity, or something done in breach of a condition, is lawful. Section 192 certifies that a proposed use or operation would be lawful. A section 192 application is a legal argument about whether what you intend requires permission. A section 191 application is a factual argument about what has happened and for how long.

For a section 191 application you have to establish the use, its continuity and its duration. Continuity is where cases collapse. A period of shared occupation with a gap of eight months in the middle is not a continuous period, and a declaration that describes the use in general terms will not show whether the gap existed.

Time limits changed. The Levelling-up and Regeneration Act 2023 moved the immunity periods in England to ten years for breaches occurring on or after the date those provisions took effect, replacing the four-year rule for operational development and for change of use to a single dwellinghouse. Older breaches keep the rules that applied when they occurred, so establish the date the breach began before deciding which period you must cover. Check the current position on legislation.gov.uk.

Who may administer a declaration

A statutory declaration is made under the Statutory Declarations Act 1835 and must be administered by someone authorised to take it: a solicitor holding a practising certificate, a commissioner for oaths, a notary public, or in some circumstances a justice of the peace or an authorised court officer.

Two practical rules. The person administering it cannot be acting for you in the same matter, which rules out your own solicitor on the transaction. And the declarant signs in the administering officer's presence, so a declaration signed at home and posted for signature is defective.

A statutory fee is set by order, with an additional amount per exhibit. Check the current order, because the figures are set by statutory instrument and have been amended.

Witness statements and letters are not statutory declarations and carry less weight, though they are still evidence. Where a witness will not attend a solicitor, take a signed and dated letter rather than nothing, and say in the covering submission why it is not a declaration.

Content that makes a declaration useful

A declaration is worth what its detail is worth. Write it as a chronology, in the first person, from the declarant's own knowledge.

What it must contain:

1. Who the declarant is, their address, and their relationship to the property and the period they can speak to.
2. The basis of their knowledge, stated plainly: they lived there, they managed it, they collected the rent, they delivered to it weekly.
3. A dated chronology with months and years rather than approximations, covering the whole period relied on.
4. A precise description of the use at each point: how many bedrooms let, to how many households, whether facilities were shared, what the building was used for.
5. An explicit statement that the use was continuous, with any interruption identified and explained.
6. A list of exhibits, each referenced in the text and marked in the usual way.
7. The declaration wording itself, the place and date, and the signature of the person administering it.

What ruins one: "for many years", "around 2015", "to the best of my recollection" used as a substitute for a date, and hearsay from someone who is not making their own declaration. An authority is entitled to treat vague evidence as insufficient rather than to give the applicant the benefit of the doubt.

Where the declarant truly cannot remember an exact month, say which season and tie it to an event that is documented elsewhere. "The first tenants moved in the week after my father's funeral in March 2016" is precise. "Sometime in 2016" is not.

Corroborating evidence to assemble

The declaration is the frame. Documents fill it in, and each one should map to a period in the chronology.

• Council tax bills and, for shared houses, records of any class N exemption or banding change.
• Utility bills showing consumption rather than standing charges only, which distinguishes occupation from an empty property.
• Tenancy agreements, rent books, deposit protection records and rent statements.
• Electoral roll entries for the address.
• Bank statements showing rent received, with irrelevant lines redacted.
• Business rates records, insurance policies naming the use, and accountant's records.
• Dated photographs with metadata where available, and dated aerial imagery.
• Correspondence with the council, including any licensing or environmental health contact, which is powerful because it is the authority's own record.

Two habits help. Build a single schedule listing every document, its date, and which part of the chronology it supports, and put it at the front of the submission. And redact carefully rather than heavily, because a document with the crucial date blacked out proves nothing.

When the council challenges the evidence

An authority can refuse where it considers the evidence insufficient, and it can put contrary evidence of its own: officer site visit notes, aerial photography, its own council tax or licensing records, complaint records.

The response is not more assertion. It is either a further declaration from someone who can speak to the disputed period, or a document that fixes the date. Where the council's own record is the problem, ask for it under an information request and address it directly rather than around it.

Officers sometimes raise the quality of the report accompanying the application rather than the underlying facts, and there are limits on when a council can reject a report because of its author that are worth knowing.

Deliberately false evidence is a criminal matter. Section 194 makes it an offence to knowingly or recklessly make a false or misleading statement, or to withhold material information, with the aim of procuring a certificate, and a certificate obtained that way can be revoked.

Appeals and cross-examination

Refusal carries a right of appeal to the Secretary of State under section 195. The appeal is a fresh determination on the evidence, and the choice of procedure matters more here than on most appeals.

Written representations suit a case where the documents speak for themselves. Where the facts are actively disputed and witnesses need to be tested, an inquiry allows cross-examination, and a declarant whose account survives cross-examination is far more persuasive than the same account on paper.

Prepare declarants for that possibility from the outset. A witness who wrote "approximately" in a declaration and is then asked in the witness box how they arrived at the date will either have an answer or will damage the case. That is a reason to get the detail right in the declaration rather than to leave it soft.

An illustrative example

An owner applies for a certificate that a terraced house has been in use as a small shared house since 2014, before an Article 4 direction removed the permitted change. The bundle contains a declaration from the owner with a month-by-month letting chronology, a declaration from the long-standing letting agent who collected rent, 11 years of tenancy agreements, council tax records showing continuous occupancy, and bank statements showing rent received. The council's aerial photography adds nothing either way, and the certificate is granted. This example is illustrative and not drawn from a decided case.

Fees and where the burden sits

The fee for a certificate of an existing use under section 191 is calculated by reference to what a planning application for that development would cost. A certificate of a proposed use under section 192 is charged at half that amount. Fees are indexed, so check the current schedule rather than a figure from an old article.

The burden of proof rests with the applicant throughout, and that is the point to design the submission around. The authority does not have to disprove anything. It only has to conclude that what you have put in front of it does not establish the position on the balance of probabilities.

That is why the work is front-loaded. Assemble the documents, then write the declaration around them, then write the covering statement that ties both to the statutory test. The planning statement is where the legal argument belongs, separate from the factual evidence, and separating the two makes the officer's job easier. PlanScope drafts are AI-assisted and structured to UK planning policy, with missing facts flagged rather than invented. Reports should be reviewed before submission. We do not guarantee planning approval.

This is general guidance, not legal advice. A lawful development certificate is the only formal way to confirm that a use or operation is lawful, and you should take advice from a qualified professional on the facts of your case. Work out which of the supporting documents your application needs, or find a reviewer through the professional directory.