Enforcement notice: what it means in planning

An enforcement notice is the formal notice a council issues under section 172 of the Town and Country Planning Act 1990 when it believes there has been a breach of planning control and that it is expedient to act. It tells the recipient what the council says is wrong, what has to be done about it, and by when. Ignoring one is a criminal offence. It is the heaviest of the routine enforcement tools, and because it attaches to the land rather than to a person, it follows the property when it is sold.

Most people meet the term in one of two ways: a notice arrives through the letterbox, or a neighbour asks the council to serve one.

What counts as a breach of planning control

Section 171A defines it narrowly. There are two kinds. The first is carrying out development without the planning permission required for it. The second is failing to comply with any condition or limitation attached to a permission that was granted.

That definition does a lot of work. Untidy land, a boundary dispute, a drainage nuisance or work that breaches building regulations are not breaches of planning control, whatever else they are. Councils receive a steady stream of complaints that fall outside the definition and can only be answered with a letter saying so.

A breach is not in itself a crime. Building without permission is unlawful, not criminal. It becomes criminal only once a notice has been served and the compliance period has run out.

The time limits that make a breach immune

Section 171B sets the periods after which no enforcement action can be taken. The position changed recently, so the date of the breach matters.

Anything that had already become immune under the old four-year rule keeps that immunity. The clock runs from substantial completion for building work and from the start of the breach for a use or a condition. Deliberate concealment can stop the clock through a planning enforcement order, so the rule is not a reliable shelter for work hidden behind a hoarding.

The only way to put immunity beyond argument is a lawful development certificate under section 191, which shifts the burden onto the applicant to prove the facts on the balance of probabilities.

What the notice must contain and when it bites

Section 173 prescribes the contents. The notice has to state the matters that appear to constitute the breach, say which limb of section 171A they fall under, set out the steps required or the activities to cease, specify the period for compliance, and give the council's reasons. It must be accompanied by a plan showing the land precisely.

Service rules are in section 172. Copies go to the owner, the occupier and anyone else with an interest in the land that the council thinks is materially affected. The notice must be served not less than 28 days before the date it is to take effect, and that effective date is stated on its face.

An appeal made before the effective date suspends the notice until the appeal is decided or withdrawn. If no appeal is made, the notice takes effect on the stated date and the compliance period begins to run. Failure to comply after that is an offence under section 179, prosecuted in the magistrates' court.

Enforcement notices are also entered on the council's enforcement register and show up on local land charges searches, which is how buyers find out about them.

Appealing: the grounds in outline

An appeal goes to the Planning Inspectorate, not to the council, and section 174 lists the grounds. In short form they are that permission ought to be granted, that the matters have not occurred, that they do not amount to a breach, that the time limits had already expired, that the notice was not properly served, that the required steps go beyond what is needed, and that the compliance period is too short.

Ground (a) carries a deemed planning application and therefore a fee, and it is the ground on which the merits of the development are argued. The others are technical. Our detailed walk-through of the seven statutory grounds sets out what evidence each one needs, and the companion piece on what a notice contains covers the drafting defects that appeals turn on.

Miss the deadline and the right of appeal is gone. There is no discretion to extend it.

An illustrative example

Take an illustrative case. A homeowner builds a detached garden studio with a shower room and lets it as a separate flat. The council receives a complaint about a second set of bins and investigates.

The building itself might well be permitted development under Class E of Part 1, because outbuildings incidental to the enjoyment of a dwellinghouse often are. But using it as a separate dwelling is a material change of use, and that is the breach. The notice would require the residential use as a separate unit to cease, and it would probably require removal of the cooking facilities rather than demolition of the building, because the steps must not exceed what is needed to remedy the breach.

Appealing on ground (f) would be the obvious move if the notice demanded demolition. That is the shape of a lot of domestic enforcement: the argument is about the scope of the remedy, not about whether something happened.

Notices that are not enforcement notices

A breach of condition notice under section 187A deals only with conditions and carries no right of appeal to the Secretary of State, which is why councils reach for it when the breach is a clear failure to comply with something like a working-hours condition or an aftercare condition on a restored site.

A planning contravention notice is a request for information, served under section 171C to find out who is doing what. A stop notice and a temporary stop notice halt activity quickly where harm is serious, and a temporary stop notice can take effect immediately. An enforcement warning notice, introduced by the Levelling-up and Regeneration Act 2023, invites a retrospective application where permission might realistically be granted.

None of these is an enforcement notice, and the consequences of each are different.

If one is served on you

1. Note the effective date on the front page and count back. That, not the compliance period, is your appeal deadline.
2. Read the alleged breach word for word. Appeals are frequently won because the notice describes something other than what is actually on the ground.
3. Gather dated evidence of when the work was done or the use began, because the time limit ground depends entirely on it.
4. Decide whether you are defending the development or the remedy. They are different cases and need different evidence.
5. Take advice before the deadline, not after. And do not assume that applying retrospectively pauses the notice, because it does not.

Where the answer is a retrospective application, the supporting documents are the same ones a normal application needs, and a planning statement that addresses the policies head-on does more work than any letter. You can see which reports a site typically requires on the report types index.

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.