Council enforcement priorities and how complaints work

Planning enforcement is discretionary. A council that finds a breach of planning control is not obliged to act on it, and the legislation says so: section 172 of the Town and Country Planning Act 1990 allows an authority to issue an enforcement notice where it appears to them expedient to do so. That single word explains most of the frustration people feel when they report something and nothing visible happens.

Understanding what a council can do, what it must do, and what it is likely to prioritise makes a complaint far more effective. So does providing the right information at the start.

Making a complaint and what to include

Most councils take enforcement reports through an online form. The quality of what you send determines how quickly the case moves, because an officer with a clear description can often establish the position from the file before visiting.

Useful to include:

• The exact address, with a description of the location if the works are on land without a street number.
• What is happening, described factually rather than characterised. "A single storey extension has been built across the rear of the house, approximately 5 metres deep" is worth more than "an unauthorised monstrosity".
• When it started and whether it is continuing, with dates.
• Photographs taken from your own property or from public land, dated.
• Whether you have raised it with the owner, and what they said.
• Any planning reference you have already checked.

Do not trespass or photograph inside someone's home. Evidence gathered that way causes problems for the council rather than helping it.

Your identity is normally kept confidential by the enforcement team, though a council cannot give an absolute guarantee, because information can become disclosable in some circumstances. Anonymous reports are usually investigated, but they are harder to progress because the officer cannot come back with questions.

Enforcement as a discretionary power

The discretion is not unlimited, but it is real. National policy asks authorities to act proportionately, and to consider whether a breach causes harm that justifies formal action. A council must also be satisfied that taking action is expedient, weighing the harm against the cost and the prospect of success on appeal.

There is a related point that surprises many complainants. A breach of planning control is not, in itself, a criminal offence. Building without permission is unlawful but not criminal, and it becomes criminal only where an enforcement notice is served and then not complied with. The exceptions are works to a listed building without consent, works to a protected tree, and unauthorised display of advertisements, all of which are offences from the outset.

That is why the response to a report is usually an invitation to submit a retrospective application rather than immediate action. It is also why a council will often say a breach is minor and it will not pursue it.

Published enforcement policies and priorities

Most authorities publish a local enforcement plan setting out how they prioritise cases, what response times to expect, and the circumstances in which they will not act. Find your council's plan before you complain, because it tells you how your case will be categorised.

Priorities differ between authorities, but the pattern is recognisable. Highest priority usually goes to unauthorised works to listed buildings, works to protected trees, development causing immediate harm to safety or to a protected habitat, and breaches in conservation areas. Middle priority covers unauthorised change of use with amenity effects, breaches of conditions and non-compliance with approved plans. Lowest priority covers minor householder matters where harm is limited, such as a fence slightly over height, a dropped kerb formed without consent or an outbuilding marginally too tall.

Time limits also shape priority. Under changes made by the Levelling-up and Regeneration Act 2023, the immunity period in England became ten years for all breaches, replacing the previous split between four years for operational development and change of use to a single dwelling and ten years for other breaches. The change applies to breaches occurring after the commencement date, with earlier breaches keeping the previous position, so check which period applies to the date the works were carried out.

Investigation steps and typical timescales

The sequence is broadly consistent across authorities.

1. Registration of the complaint and an initial check of the planning history.
2. A site visit or an external inspection, often unannounced.
3. A decision on whether a breach has occurred, which sometimes requires a planning contravention notice under section 171C requiring the owner to provide information about the use of the land.
4. Where a breach exists, a decision on whether formal action is expedient.
5. Negotiation, which is the route most cases take, typically an invitation to apply retrospectively or to cease the activity by an agreed date.
6. Formal action where negotiation fails.

Timescales are the part people find hardest. An initial visit within days or weeks is common for a priority case and much longer for a low priority one. Negotiation can run for months, particularly where a retrospective application is submitted and then determined on its merits like any other application. Councils are generally under-resourced in enforcement, and that is a structural problem rather than a sign that your case has been ignored.

The formal tools available

Enforcement notices are the best known but not the only option. A breach of condition notice under section 187A deals with non-compliance with a condition and carries no right of appeal to the Planning Inspectorate, which makes it quicker where the breach is clear. A temporary stop notice can halt activity immediately for a limited period. A full stop notice can accompany an enforcement notice. An injunction under section 187B is available where the harm is serious and urgent.

An enforcement notice must specify the breach, the steps required, and a compliance period, and it takes effect after a stated date, usually at least 28 days later. The recipient can appeal to the Planning Inspectorate on statutory grounds, which suspends the notice until the appeal is decided. Appeals commonly take months, and one of the available grounds is that planning permission ought to be granted, so an appeal can end with the development being permitted.

The enforcement register and what it shows

Section 188 of the 1990 Act requires each authority to keep a register of enforcement notices, stop notices and breach of condition notices, available for public inspection. Most councils publish it online alongside the planning register.

The register records formal notices, not complaints. A case being investigated, negotiated or closed without action will not appear, which is why the register often looks empty in an area where enforcement officers are busy. If you want to know what happened to your report, ask the case officer for an update and the case reference rather than searching the register.

When no action will be taken

Councils close cases for reasons that are usually legitimate, even when they are unwelcome. There is no breach, because the works are permitted development or match an approved plan. Householder cases often turn on rules such as rear extension depth or the limits on an outbuilding used for business or letting. The breach is immune because the time limit has expired. Action is not expedient because the harm is limited. Or a retrospective application has been granted, which regularises the position entirely.

A council should tell you the outcome and the reason. Where it does not, ask. Where the reason is that permission has been granted retrospectively, that decision carries the same appeal and challenge routes as any other planning decision, though third parties have no right of appeal against a grant of permission.

Escalating through the ombudsman

The Local Government and Social Care Ombudsman investigates maladministration, meaning fault in how a council handled a matter, rather than the merits of a decision it was entitled to make.

That distinction is the one to grasp before complaining. The Ombudsman will not overturn a decision that enforcement action was not expedient, because that is a judgement Parliament gave to the council. It can look at whether the council failed to investigate at all, took an unreasonable time, failed to follow its own published enforcement plan, or failed to keep you informed.

You normally have to exhaust the council's own complaints procedure first, and there is a time limit for bringing a complaint, usually 12 months from when you became aware of the problem. Keep your correspondence, dates and case references, because the Ombudsman works from the paper trail.

This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it.

If you are on the other side of this and have been asked to submit a retrospective application, the supporting documents are the same ones any application needs. PlanScope drafts them, structured to UK planning policy and flagged where site facts are missing. Browse the report types to see what a retrospective application is likely to require. Reports should be reviewed before submission, and we do not guarantee planning approval.