Nullity and invalidity of an enforcement notice

There are two different complaints hidden inside the phrase "the enforcement notice is defective". One is enforcement notice nullity, where the document is so deficient on its face that it is not an enforcement notice at all and has no legal effect. The other is invalidity, where the notice is a notice but contains an error that an inspector can correct or vary under section 176 of the Town and Country Planning Act 1990.

The distinction changes what you do. A nullity needs no appeal to defeat it, although you will usually appeal anyway as insurance. An invalid notice has to be appealed, and the error may be cured along the way.

The line between nullity and invalidity

The classic formulation comes from Miller-Mead v Minister of Housing and Local Government, where the Court of Appeal asked whether the notice tells the recipient fairly what they have done wrong and what they must do to put it right. A notice that is hopelessly ambiguous and uncertain on that test is a nullity.

Invalidity is different in kind. The notice does convey what is alleged and what is required, but it contains a mistake: a misdescription, a wrong date, an error in the steps, a reference to the wrong provision. Section 176(1) allows the inspector to correct any defect, error or misdescription, or to vary the terms of the notice, if satisfied that the correction or variation will not cause injustice to the appellant or to the local planning authority.

So the two routes are not alternatives. A nullity cannot be corrected, because there is nothing to correct. An invalid notice cannot be ignored, because it takes effect unless appealed.

Defects that make a notice a nullity

The cases cluster around omissions rather than errors. A notice is likely to be a nullity where it fails to do one of the things the Act requires it to do at all.

• It does not identify the land to which it relates, or identifies it so vaguely that the boundary cannot be worked out.
• It does not state the matters that are alleged to constitute the breach of planning control.
• It does not specify the steps required to be taken, or the activities required to cease.
• It does not specify any period for compliance.
• The requirements contradict each other so that compliance is impossible to determine.

Notice what is absent from that list. A failure to serve a copy on someone entitled to receive one is not a nullity; it is the subject of ground (e) of section 174, and the inspector will consider whether anyone was substantially prejudiced. Nor is a notice a nullity because the council has got the planning merits wrong, which is what grounds (a) to (d) are for.

Defects the inspector can correct

Section 176 is used regularly and most defects fall on this side of the line. Common corrections include amending the description of the breach so it matches what has actually happened, adjusting the stated purpose of the notice between remedying the breach and remedying injury to amenity, correcting a plan reference or a compass direction, deleting a requirement that goes further than necessary, and extending the compliance period.

Two consequences follow for the appellant. Pointing out a modest defect may simply produce a better notice, corrected at your expense in time and fees. And a correction that changes the notice materially can affect which grounds you should be running, so keep the grounds under review once the council's statement arrives and you can see what it is prepared to concede.

The correcting power has a boundary. An inspector cannot use section 176 to turn one notice into a substantially different one, and cannot correct a defect where the correction would cause injustice, for example by alleging a different breach that you have had no chance to answer.

Injustice and the limits on correction

Injustice is the control on the power, and it is assessed practically. The question is whether the correction leaves either party worse off in a way they could not deal with in the appeal.

Arguments that succeed tend to involve a change in the substance of the allegation. Where a notice alleges an unauthorised use as three flats and the council seeks a correction to two flats plus an office, the appellant's evidence was directed at a different case. Where a correction would deprive the appellant of a ground that would otherwise have succeeded, the same reasoning applies.

Arguments that fail tend to involve tidying. A misspelled street name, a transposed grid reference, a wrong section number, or a description that is imprecise but not misleading. Inspectors correct those and move on.

If you want to resist a correction, say what the injustice actually is in concrete terms: which evidence you would have obtained, which witness you would have called, which ground you would have pleaded. An assertion of unfairness with no particulars carries little weight, in much the same way that a bare assertion carries little weight when you are reading reasons for refusal before deciding to appeal.

Raising the point before the appeal

Section 285 of the 1990 Act restricts challenging the validity of an enforcement notice in other proceedings, with an exception for a person who was not served and had no knowledge of it. In practice that means the appeal is where the argument happens.

Before the notice takes effect, write to the council setting out the defect and inviting it to withdraw the notice. Authorities can withdraw a notice under section 173A and issue a fresh one, and many will do so rather than defend a hopeless document.

Weigh that carefully, because a withdrawal and re-issue restarts the clock and gives the council a chance to draft properly. If the unauthorised use is approaching immunity through the passage of time, forcing a re-issue may be exactly what you do not want. If the notice requires demolition and the new one might require less, it may be exactly what you do.

Lodge the appeal regardless, before the notice takes effect. If your nullity argument is wrong, the appeal is the only thing standing between your client and a notice in force, and you cannot appeal late.

The effect on the compliance period

A corrected or varied notice does not automatically give you longer to comply. The compliance period runs from the date the notice takes effect, and an appeal suspends the notice until it is determined, so in practice the period begins when the appeal decision is issued.

If you need more time than the notice allows, that is ground (g) and it needs its own evidence: a dated programme with quotations, lead times, statutory notices and any seasonal constraint. Do not rely on the correction power to buy time it was not designed to provide.

Whether to raise the point at all

Be honest with the client about what a nullity argument achieves. It defeats this notice. It does not make the development lawful, it does not prevent a new notice, and it does not confer immunity.

Raise it where the notice is plainly unintelligible, where the time gained matters because immunity is close, or where the council's drafting suggests the underlying case is weak. Leave it where the defect is cosmetic, because pursuing it costs credibility with the inspector and can attract a costs application if it was plainly hopeless. The council's own view of the strength of its notice usually shows in its statement, and our note on the appeal questionnaire and the council's statement explains how to read it.

Where you are also running the planning merits, keep that case in a properly structured Planning Statement, and remember that earlier decisions on comparable notices are indicative rather than binding when you are using appeal decisions as evidence.

One honest uncertainty. The boundary between a defect that is fatal and one that is correctable has been drawn case by case for sixty years, and inspectors are more willing to correct than appellants expect. Plan the appeal on the assumption that the notice will survive.

This is general guidance, not legal advice; check the position with your local planning authority or a qualified professional before relying on it. PlanScope can draft the planning documents an enforcement case needs in minutes, ready for review. Enter your postcode on PlanScope to see which reports your site is likely to need.

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