Section 192 certificates and the half fee rule

A certificate of lawfulness for proposed use or development, applied for under section 192 of the Town and Country Planning Act 1990, costs half the fee of the planning application it corresponds to. That is the headline for anyone budgeting a section 192 certificate fee, and it is set out in the fee regulations rather than being a local concession. The saving is real but narrow, because a section 192 certificate does nothing except confirm that what you propose would be lawful without permission. If the answer is that permission is needed, you have spent half a fee to find out.

The difference between section 191 and section 192

Both sections produce a lawful development certificate, and they behave quite differently.

Section 191 covers what already exists. It asks the authority to certify that an existing use, existing operations or a breach of condition is lawful, usually because the relevant time limit for enforcement has passed. The burden of proving the facts sits with the applicant, on the balance of probabilities, and evidence means statutory declarations, invoices, utility bills, aerial photography and tenancy records.

Section 192 covers what you intend to do. It asks whether a proposed use or proposed operations would be lawful if begun at the date of the application. There is no history to prove. The question is legal, and the evidence is the description and the drawings.

Why the fee is half the equivalent application fee

The fee regulations set the charge for a section 192 application at half the fee payable for the application for planning permission that would correspond to the proposal. So the first task is identifying the corresponding application, because that determines the base figure.

For a single dwelling extension it is the householder fee. For a new dwelling it is the per-dwelling rate. For a change of use it is the change of use category. Mixed proposals need the fee calculated as if you were applying for permission, then halved, and the arithmetic is the same arithmetic that governs full application fees based on floorspace and site area.

The figures themselves move. Planning fees were uplifted in December 2023 and are indexed annually, so take the current number from the published fee schedule rather than from an old file. The mechanics of that uprating are covered in how planning fees are indexed each April.

One caution on budgeting. The half fee applies to the application, not to the work of preparing it. A section 192 application that turns on a contested reading of Class A of Part 1 of Schedule 2 to the General Permitted Development Order can take more drafting time than the planning application would have done, because the submission has to argue the law rather than the merits.

What a proposed use certificate can confirm

A certificate can confirm that a proposal would be lawful. It cannot make an unlawful proposal lawful, and it cannot grant permission.

The usual uses are these. That a change of use falls within the same use class and so is not development. That works fall within a permitted development class and satisfy every limitation and condition in it. That an operation is not development at all under section 55 of the Act. Building control sits outside all of this, and building control charges run alongside the planning fee whichever route you choose. That an existing permission can still be implemented. That a condition does not prevent what you intend.

Where a certificate is granted, the lawfulness of the use or operations described in it is conclusively presumed, provided there is no material change in the relevant matters before the use starts or the operations begin. That conclusive effect is the real product. A planning officer's informal email saying "that looks like permitted development to me" has no legal weight at all.

Describing the proposal precisely enough to be certified

A certificate only covers what it describes, so a loose description produces a useless certificate. This is where most applications fail.

Write the description as the authority would write a condition. Identify the land by address and plan, state the use in use class terms where a class applies, and reference drawings by number and revision. For operations, give dimensions: depth from the original rear wall, height to eaves, ridge height, materials, and the position relative to the boundary.

• Include every limitation the relevant permitted development class turns on, and state the figure for each
• Confirm the original building and its curtilage, with evidence of what was there on 1 July 1948 or at first construction where that matters
• Confirm the absence of an Article 4 direction, a conservation area designation or a condition removing the rights
• Attach a plan showing the whole curtilage rather than only the works

An illustrative example. An applicant seeks a certificate for a single storey rear extension on a semi-detached house, described as 3m deep, 2.9m to eaves and flat-roofed, with no part forward of a principal elevation and no side extension already built. The description names the drawing, states each dimension against the Class A limits and confirms that the house has not been extended since 1948. That certificate is useful. A description reading "proposed rear extension as shown on the attached plan" is not, because it leaves the authority to work out which limitation it is certifying compliance with.

Where permitted development rights are in doubt

Section 192 earns its fee where the rights themselves are arguable. Conservation area status, an Article 4 direction, a condition on an earlier permission removing Class A rights, a house that is actually a flat, a building whose curtilage is not what the owner assumes, or a previous extension that nobody recorded.

It is also the sensible route where the proposal depends on whether a use has changed at all. Running a business from a house, splitting an annexe into a separate planning unit or intensifying an agricultural use are all questions of fact and degree, and a certificate resolves them with legal effect rather than with an officer's opinion.

The honest caveat is that the authority can refuse, and refusal is not neutral. A refusal records the council's view that the proposal is not lawful, which an enforcement officer will read later. Weigh that before applying on a weak argument.

The effect of a certificate on a later enforcement dispute

A certificate is the strongest document you can hold if the council later questions the works. The conclusive presumption means the authority cannot enforce against what the certificate describes, provided the works match the description and nothing relevant has changed since the application date.

The limits matter. Build 3.4m deep when the certificate says 3m and the certificate does not cover the extension as built. Change the use beyond the certified description and the protection goes with it. And making a false or misleading statement to obtain a certificate is a criminal offence under the Act, so the evidence in the application needs to be accurate rather than optimistic.

There is a right of appeal to the Secretary of State against refusal or against a certificate issued in different terms from those applied for, and against non-determination after eight weeks.

When a planning application is the better buy

Half a fee is only a saving if the certificate answers the question you actually have.

A planning application is usually the better purchase where the proposal plainly needs permission, where the design is likely to change during determination, where you want the council's judgement on the merits, or where a lender or buyer wants a permission rather than a certificate. Permission also gives you a decision notice with conditions you can discharge, which is sometimes easier to explain to a conveyancer than a certificate.

Section 192 is the better purchase where you are confident the proposal is lawful without permission, where the client needs certainty before exchanging or starting work, and where the legal point is clean enough to argue in a few pages.

If the budget question is the one in front of you, see PlanScope pricing and draft the supporting statement for your own review before you commit to either route.

This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it. A lawful development certificate is the only formal way to confirm that works are lawful. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.