When an enforcement notice is a nullity

An enforcement notice that is a nullity is not a defective notice. It is no notice at all, and nothing an inspector does on appeal can turn it into one. That distinguishes it from a notice that is merely invalid, where section 176 of the Town and Country Planning Act 1990 lets the Secretary of State correct a defect or vary the terms provided no injustice results.

The distinction has been settled since Miller-Mead v Minister of Housing and Local Government in 1963, where the Court of Appeal held that a notice is a nullity if it is so ambiguous and uncertain that the recipient cannot tell what they are said to have done wrong and what they must do about it. That is still the test.

Nullity against invalidity

A nullity has no legal existence. Time does not run from it, no offence can be committed by failing to comply with it, and it cannot be cured. The authority's only option is to serve a fresh notice, which restarts the whole process including the appeal period.

Invalidity is a defect in an otherwise identifiable notice. The recipient can tell what is alleged and what is required, but something about the notice is wrong: a misdescription of the land, an error in the date a use began, a requirement expressed more widely than necessary. Section 176(1) allows the Secretary of State to correct any defect, error or misdescription, or to vary the terms, if satisfied that the correction or variation will not cause injustice to the appellant or the authority.

The practical difference is where you can take the point. Section 285 prevents the validity of a notice being challenged in other proceedings on grounds that could have been raised on appeal. Nullity is outside that bar, because if there is no notice there is nothing for section 285 to protect, so the point can be taken in the magistrates' court on a prosecution.

Defects that make a notice a nullity

The categories are narrow and mostly procedural in nature.

• No statement of the matters alleged to constitute the breach, or a statement so unclear that the recipient cannot identify the conduct complained of
• No steps required and no activities required to cease, so the recipient cannot know what compliance means
• No period for compliance stated
• No date specified on which the notice is to take effect
• A description of the land so uncertain that it cannot be identified

Notice what those have in common. Each removes something without which the document cannot function as an instruction. A notice that requires unspecified works to be carried out within an unspecified period is not a hard notice to comply with. It is not a notice.

Defects an inspector can correct

Most things people describe as fatal are not. Inspectors routinely correct the description of the breach where the substance is clear, amend the extent of the land shown on the plan, adjust requirements that go beyond what is needed, and extend compliance periods.

The limit is injustice. A correction that changes the case an appellant came to answer, or that catches development the notice never described, will not be made. So the question to ask about any defect is not whether it is an error, but whether correcting it would leave either party materially worse off than if the notice had been right from the start.

Service defects sit in a different place again. Failure to serve a copy on someone entitled to it is ground (e) under section 174(2), and it only assists if substantial prejudice results. It does not make the notice a nullity.

One further category is worth separating out. A notice that alleges a breach which, on its own terms, is not a breach of planning control at all is not a nullity. It is a notice liable to be quashed on ground (c), that the matters alleged do not constitute a breach. The document functions perfectly well as an instruction. It is simply wrong, and being wrong is what the appeal process exists to deal with.

That distinction trips people up because the practical outcome feels similar. It is not similar at all, because a ground (c) point has to be taken on appeal within the time limit, and a nullity point does not.

Why an appeal is still usually advisable

You may be confident the notice is a nullity. Lodge an appeal anyway, before the date the notice purports to take effect.

The reasoning is asymmetric. If you are right, the appeal costs the fee and the preparation and adds nothing to the outcome, because the notice had no effect in any event. If you are wrong, and you did not appeal, the notice takes effect, the grounds of appeal are lost permanently, and non-compliance becomes a criminal offence. One of those outcomes is recoverable and the other is not.

Where ground (a) is being pleaded as part of that protective appeal, remember that it creates a deemed application carrying a fee at twice the ordinary rate, and that the ground lapses if the fee is not paid by the date the Inspectorate sets. Budget the appeal as a whole before starting it, and if you are weighing the cost of preparing the supporting evidence, PlanScope pricing sets out what drafting the documents costs against a consultant's quotation.

Consequences of simply ignoring a notice

Failing to comply with an effective enforcement notice is a criminal offence, and the risk of misjudging nullity falls entirely on the recipient. Councils prosecute, and a conviction can be followed by confiscation proceedings where the breach generated income, which on an unauthorised HMO or a commercial use can dwarf the planning issue.

There is also a reputational dimension that matters commercially. A client who has been prosecuted is a harder client to represent at the next application, and the file follows them.

So take the point, but take it in writing and take it early. Write to the authority setting out precisely why the document does not satisfy section 173, and invite them to withdraw it. Some will.

The tactical consequence of raising it early

Raising nullity early has a cost worth being honest about. If the authority accepts the point, it serves a fresh notice, correctly drafted this time, and your client is back where they started with a better notice against them.

That is sometimes the right outcome and sometimes not. Where immunity is approaching under the time limits in section 171B, a delay caused by a fresh notice can matter a great deal. Where the substantive case is strong, forcing the authority to serve a competent notice simply clarifies the argument. It is a judgement that depends on the client's position rather than a rule.

There is a further reason to act quickly. An authority that has been told its notice is defective will often check the rest of the file at the same time, and the fresh notice tends to arrive with better evidence, a tighter description of the breach and requirements that are harder to challenge under ground (f). If your client's case depends on the requirements being excessive, raising a drafting point early can cost more than it saves.

Recording the point for later

Whatever you decide, build the record now. Keep the notice, the envelope and any covering letter. Photograph the plan attached to it. Note the date of receipt and by whom. Keep any correspondence in which the authority describes what it says the breach is.

If a prosecution follows years later, that file is the evidence for a nullity argument in the magistrates' court, and reconstructing it from memory is not possible. Where the breach is likely to be regularised through a fresh application instead, assembling the supporting documents now means the application is ready when the decision is made rather than months afterwards.

Where the scheme can be made acceptable, the better answer is usually a fresh planning application prepared properly rather than a procedural skirmish. Enter your postcode on PlanScope to see which reports a site is likely to need before that application is made.

This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.