Enforcement notice: what it must specify to be effective

An enforcement notice that does not meet the statutory content requirements can be worthless, and the enforcement notice requirements are tighter than most recipients realise. Section 173 of the Town and Country Planning Act 1990 tells the authority what the notice must say: the matters alleged to constitute the breach, which limb of section 171A(1) the breach falls under, the steps required or the activity to cease, the date the notice takes effect and the period for compliance. Miss one of those and the notice may be a nullity rather than merely wrong.

That distinction decides what you do next, so it is worth getting straight before the appeal deadline passes.

The five things the notice has to state

A breach of planning control under section 171A(1) is either development carried out without the permission it needed, or a failure to comply with a condition or limitation on a permission that was granted. The notice has to say which of those two it alleges. Authorities sometimes hedge and plead both, which is lawful but tends to weaken the drafting.

The allegation itself has to be clear enough that the recipient knows what they are said to have done. Section 173(2) puts it in those terms: the notice complies if it enables any person served with a copy to know what the matters are. The Court of Appeal in Miller-Mead framed the underlying test as whether the notice tells the recipient fairly what they have done wrong and what they must do to put it right.

Then the steps. Section 173(3) requires the notice to specify what the authority wants done, or what activity must stop, and section 173(4) limits the purposes those steps can serve: remedying the breach by bringing the development into line with a permission, discontinuing a use, or restoring the land to its earlier condition; or remedying injury to amenity caused by the breach. A step that goes beyond those purposes is excessive and can be struck down on appeal.

Finally the dates. The notice specifies when it takes effect, which cannot be less than 28 days after service, and a compliance period running from that date. Different steps may carry different compliance periods.

The 2002 Enforcement Notices and Appeals Regulations add two more requirements: the notice must give the reasons why the authority considers it expedient to issue it, and it must define the land precisely, by plan or otherwise. The plan is where defective notices most often fall over, particularly on sites where the unauthorised use occupies part of a building.

Nullity against invalidity

A notice is a nullity when the defect is so fundamental that the document cannot do the job the Act gives it. No land identified. No steps specified. No date on which it takes effect. In those cases there is nothing to appeal against, and the notice can be treated as having no legal existence, though a declaration or judicial review is the cautious route.

A notice is merely invalid when it is defective but still recognisable as an enforcement notice. That has to go to appeal, because section 285(1) bars anyone from questioning the validity of an enforcement notice in other proceedings on the grounds available under section 174. Ignoring an invalid notice and arguing about it later when prosecuted does not work.

The inspector also has a corrective power. Section 176(1) allows the notice to be corrected or its terms varied where the Secretary of State is satisfied that doing so will not cause injustice to the appellant or the authority. Minor drafting errors get fixed on appeal rather than defeating the notice, so the "spot the typo" strategy rarely succeeds.

How time limits interact with the allegation

The old immunity rules gave four years for building, engineering, mining or other operations and for a change of use to a single dwellinghouse, and ten years for everything else, including other changes of use and breaches of condition. Section 115 of the Levelling-up and Regeneration Act 2023 replaces that split with a single ten-year period in England. When that change took effect, and how it treats breaches that began earlier, both need checking against the current legislation for your specific date of breach.

This matters to the allegation because the authority has to plead a breach that is still enforceable. Where a notice alleges a material change of use that began outside the relevant period, ground (d) of section 174 is the answer, and the burden of proving immunity sits with the appellant on the balance of probabilities. Continuous use evidence, utility bills, tenancy agreements and council tax records carry more weight than recollection.

A planning contravention notice often arrives first, and what you say in reply becomes the authority's evidence about when the use started. Answer it accurately and briefly.

An illustrative example

Take a mid-terrace house, illustrative only, where the owner has subdivided the ground floor and the rear outrigger into a studio flat with its own front door, leaving the upper floors as a two-bedroom flat. No permission was sought. The authority serves a notice alleging the material change of use of the dwellinghouse to two self-contained flats and requiring the owner to cease the use of the property as two separate dwellings and to remove the second kitchen and the additional entrance door.

Three things in that notice are worth testing. The removal of the entrance door goes to amenity and the external appearance, so it is arguably within section 173(4)(b). Removing the kitchen is a step towards discontinuing the use rather than restoring the building, which is usually accepted. But a requirement to reinstate internal walls that were never there before the breach would be excessive, because restoration cannot go beyond the earlier condition of the land.

And if both flats have been separately occupied and council-taxed for more than ten years, the use may be immune, in which case the right response is a certificate application rather than an appeal on the planning merits.

What it gets confused with

An enforcement notice is not a breach of condition notice, which is served under section 187A, carries no appeal to the Planning Inspectorate and is enforced by prosecution alone. It is not a stop notice, which only bites on an existing enforcement notice and exposes the authority to compensation. It is not a planning contravention notice, which is an information-gathering device.

It is also not the same as a section 215 notice about the condition of land, which addresses untidiness rather than a breach of control. Owners who receive a tidy-up notice sometimes assume the use itself has been accepted. It has not.

The appeal route is where most of the argument happens, and the seven statutory grounds in section 174 each demand different evidence. Choose them deliberately rather than pleading all of them.

Checking the position for a site

Start with the authority's enforcement register, which is kept separately from the application register and is not always published online. Then ask the enforcement team in writing whether any notice has been served on the land, including notices served on a previous owner, because a notice runs with the land once the compliance period has expired.

Work out the date the notice takes effect and the date compliance is required, and put both in a diary. Non-compliance with an enforcement notice is an offence under section 179, and it is the authority's choice whether to prosecute, carry out the works itself and recover the cost, or seek an injunction.

Where the breach is one you would rather regularise than undo, a retrospective application under section 73A can run alongside the appeal, and the supporting documents are the same ones a fresh application would need. A Planning Statement that addresses the policy position honestly, and the other reports the site calls for, give the authority something to grant.

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.