Injunction under section 187B or an enforcement notice

A section 187B injunction and an enforcement notice do different jobs on different timescales. The notice is a planning instrument with a built-in appeal to the Planning Inspectorate and an effect that is suspended while the appeal runs. The injunction is a court order that bites immediately, carries no merits appeal, and puts the defendant at risk of imprisonment for contempt if it is ignored.

Authorities reach for the court route in a narrow set of cases. Anticipated breaches where a notice would arrive too late. Defendants who have absorbed notices and prosecutions without changing behaviour. Harm that cannot be undone once it has happened.

What an injunction can restrain

Section 187B allows an authority to apply for an injunction where it considers it necessary or expedient for any actual or apprehended breach of planning control to be restrained, whether or not it has used any of its other powers.

Three features of that wording carry most of the weight. It covers apprehended breaches, so the authority does not have to wait for anything to happen. It sits alongside the other powers rather than after them, so no notice is required first. And under section 187B(3) the court can grant an injunction against a person whose identity is unknown, which is how the power is used against anticipated unauthorised occupation of land.

The order can be prohibitory or mandatory. Restraining the deposit of waste. Requiring the removal of a structure. Restraining the stationing of caravans on a defined area shown on a plan attached to the order.

Why an authority chooses the court route

Speed is the usual answer, though not the only one. An enforcement notice takes effect no earlier than 28 days after service, and a valid appeal suspends it until the appeal is decided. On a site being actively filled with imported material, that timetable is an invitation.

Irreversibility is the second reason. Where the harm cannot be remedied after the event, the authority can argue that a notice offers no real protection. Demolition of an unlisted building in a conservation area, felling of protected trees, engineering works in a flood plain.

And persistence is the third. Where a defendant has already had notices, prosecutions and fines, a court order with the threat of committal behind it is the only remaining escalation. The Planning Practice Guidance on effective enforcement expects authorities to consider whether other action would be more appropriate before applying, and an authority that has skipped the obvious steps will be asked why.

Compare the two instruments directly.

The standard the court applies

The court is not bound to grant an injunction because the authority thinks one is expedient. In South Bucks District Council v Porter the House of Lords held that the court exercises its own discretion, and must consider whether the order sought is just and proportionate on the facts before it.

In practice the court looks at the degree and flagrancy of the breach, the harm caused, whether other remedies have been tried, the conduct of both parties, the personal circumstances of the defendant, and the human rights consequences of the order, particularly where a home is involved. The severity of the sanction for breach is itself a reason for caution, because a court will not lightly make an order it may later have to enforce by committal.

That last point is the practical lever for a defendant. An order that would put a family on the roadside is harder to obtain than an order stopping a commercial operator importing waste.

Effect on an existing enforcement notice

The two do not cancel each other out. An injunction can run alongside a notice, and a breach can attract both contempt proceedings and a prosecution under section 179.

Where an appeal against a notice is pending, the position changes. The planning acceptability of the development has not been determined, and a court asked to restrain it is being asked to pre-empt the inspector. Courts are reluctant to do that, and authorities usually have to show something that cannot wait: irreversible harm, or activity going well beyond what the notice alleged.

So the sequencing matters when advising. Lodging a well-founded appeal promptly is not just a route to overturning the notice, it also strengthens the argument against an injunction in the meantime. Which appeal route is open depends on the application and notice type, and which appeal route applies is worth settling on day one.

Contempt and its consequences

Breach of an injunction is contempt of court. The available sanctions are committal to prison, a fine, and sequestration of assets, and committal has been imposed in planning cases where defendants continued after clear warnings.

Two things follow for a client. First, an injunction has to be complied with even if they believe it is wrong, because the route to challenge it is an application to the court rather than non-compliance. Second, the terms matter enormously, and an ambiguous order is dangerous for everybody. If the order refers to a plan, get the plan. If it prohibits residential occupation of an area, know exactly where the boundary runs.

Advise clients in writing on the terms, and advise them to come back before doing anything that might touch them.

Defending an application

There is no merits appeal, so the defence is built from different material.

1. Proportionality, with evidence of personal circumstances, health, children's education and the availability of alternative sites.
2. The authority's own conduct, including delay, acquiescence and inconsistency with how it has treated comparable sites.
3. The adequacy of other remedies, which is stronger where no notice has been served.
4. Any pending or intended application or appeal that would resolve the planning position.
5. An offer of undertakings, which the court can accept instead of an order and which may be the pragmatic landing point.

The fourth is often the most useful. A client who submits a properly evidenced application, with a Planning Statement addressing the development plan and the harm alleged, is in a different position from one who has done nothing for two years. Courts notice the difference.

As an illustrative example, an authority seeking to restrain the stationing of caravans on a paddock where no enforcement notice has been served, and where the occupiers have a pending application supported by a personal needs assessment, faces a real argument that the planning route should run first. The same application against an operator importing inert waste in breach of a notice upheld on appeal is a much shorter hearing.

Advising a client facing one

Deal with the papers, then the deadline, then the strategy. Read the order sought and the evidence in support before forming a view, because the drafting of the order determines what compliance means.

Then get the planning position moving in parallel. An application, an appeal or a lawful development certificate application gives the court something to wait for. Nothing in the file gives it nothing. The same logic runs through other notice-based regimes, and the comparison with a tree replacement notice against an enforcement notice shows how differently each one treats the right to be heard.

And warn the client about costs. Civil costs follow the event, and a defeated defendant pays the authority's legal costs on top of complying with the order.

Enter your postcode on PlanScope to see which documents a retrospective or regularising application would need.

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.