Planning Enforcement: What Councils Can Do About Unauthorised Development

What happens when someone builds without planning permission - how enforcement works, time limits, and what you can do if you're affected.

Planning enforcement is how councils deal with development that has been carried out without the necessary planning permission, or where conditions attached to a planning permission have been breached. It is one of the most common concerns raised by homeowners, neighbours, and communities.

What Is a Planning Breach?

A planning breach occurs when:

• Building work is carried out without planning permission when permission was required (not permitted development)
• A change of use occurs without permission - e.g. converting a house to an HMO where an Article 4 Direction applies
• Conditions attached to a planning permission are not complied with - e.g. opening hours, landscaping requirements, or use of specific materials
• A listed building is altered without listed building consent
• Trees protected by a TPO or in a conservation area are felled or damaged

It is important to understand that carrying out development without planning permission is not a criminal offence in most cases (listed building and TPO breaches are exceptions). It is a breach of planning control that the council has discretion to take action on.

How to Report a Planning Breach

If you believe a planning breach has occurred, you can report it to your local council's planning enforcement team. Most councils have an online form or email address for enforcement complaints. You will need to provide:

• The address of the property
• A description of the alleged breach
• When the breach started (if known)
• Any evidence - photographs, dates, details

Reports are treated as confidential - the council will not disclose the identity of the complainant to the person being investigated.

What Happens After a Report?

The council's enforcement team will:

1. Investigate - assess whether a breach has actually occurred. This may involve a site visit, reviewing planning records, and writing to the property owner
2. Decide whether action is appropriate - enforcement is discretionary, not mandatory. The council will consider whether the breach causes sufficient harm to justify action
3. Negotiate - in many cases, the council will first ask the developer to submit a retrospective planning application or to voluntarily remedy the breach
4. Formal action - if negotiation fails, the council can issue an enforcement notice

Types of Enforcement Action

Enforcement Notice

The most common formal action. An enforcement notice specifies the breach, the steps required to remedy it (e.g. demolish an unauthorised extension, cease an unauthorised use), and a deadline for compliance. The recipient can appeal to the Planning Inspectorate within 28 days.

Breach of Condition Notice

Used when a planning condition has been breached. There is no right of appeal against a breach of condition notice - the recipient must comply. Non-compliance is a criminal offence with a maximum fine of £2,500.

Stop Notice

Issued alongside an enforcement notice in urgent cases where the council wants the activity to stop immediately (rather than waiting for the enforcement notice compliance period). Stop notices can attract compensation if the enforcement notice is later overturned on appeal.

Temporary Stop Notice

Can be served without an enforcement notice and takes effect immediately. Lasts up to 28 days. Used for urgent situations like unauthorised demolition or tree felling.

Planning Contravention Notice

An information-gathering tool. The council serves this to require the property owner to provide information about activities on the land. Failure to respond is a criminal offence.

Injunction

In the most serious cases, the council can apply to the courts for an injunction to prevent or require the removal of unauthorised development. This is rare and typically reserved for flagrant or repeated breaches.

Time Limits for Enforcement

There are important time limits on when the council can take enforcement action:

• 4 years - for unauthorised building works (including extensions built without permission) and for change of use to a single dwelling. If the breach has continued for more than 4 years without enforcement action being taken, it becomes immune from enforcement
• 10 years - for all other breaches, including changes of use (other than to a dwelling) and breaches of conditions

These time limits mean that some long-standing breaches may be immune from enforcement. The property owner can apply for a Certificate of Lawfulness to formally establish this immunity.

Important exception: there is no time limit for enforcement against listed building breaches or breaches that were deliberately concealed. The Localism Act 2011 gave councils the power to take action against concealed breaches even after the normal time limit has passed.

Can You Apply for Retrospective Permission?

Yes. If you have carried out work without planning permission, you can submit a retrospective planning application. The council will assess it on its merits, just like any other application. If approved, the breach is resolved. If refused, you may face enforcement action.

Submitting a retrospective application does not prevent the council from taking enforcement action - but in practice, most councils will wait for the application to be determined before proceeding with formal enforcement.

What If You Receive an Enforcement Notice?

If you receive an enforcement notice, you should:

1. Read it carefully - understand what breach is alleged and what you are required to do
2. Take professional advice - consult a planning consultant or solicitor before the appeal deadline
3. Consider your options - you can comply with the notice, appeal it (within 28 days), or apply for retrospective planning permission
4. Do not ignore it - failure to comply with an enforcement notice after the deadline is a criminal offence

Monitor Development in Your Area

You can search for planning applications near you on Planning Signal to check whether nearby development has planning permission. If a building is going up and there is no planning application on record, it may be either permitted development or an unauthorised breach worth reporting to the council.