Legal & Tenure

What is a Planning Enforcement Notice? How It Affects Owners and Buyers

A planning enforcement notice requires the owner of a property to remedy an unauthorised development or breach of planning conditions. This guide explains the process, your rights, and the risks for buyers.

Published: 16 Mar 2026 · Updated: 16 Mar 2026 · 6 min read

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What is a Planning Enforcement Notice?

A planning enforcement notice (EN) is a formal notice issued by a Local Planning Authority (LPA) requiring the owner and occupier of land to remedy a breach of planning control. A breach of planning control occurs when development is carried out without the required planning permission, or when the conditions attached to a planning permission are not complied with.

The LPA has a general discretion about whether to take enforcement action, it is not automatically required to act on every breach. The Ministry of Housing Communities & Local Government's planning enforcement guidance states that enforcement action should be proportionate to the harm caused by the breach.

What Can Trigger an Enforcement Notice?

Common triggers include:

Building an extension, outbuilding, or conversion without planning permission
Changing the use of a building without permission (e.g. converting a house into flats)
Breaching conditions attached to an existing planning permission
Carrying out works in a conservation area without consent
Displaying an advertisement without consent

The Enforcement Notice Process

Stage	What happens
Investigation	LPA investigates a complaint or identifies a breach
Pre-enforcement dialogue	LPA may invite the owner to remedy the breach voluntarily
Enforcement notice issued	Notice served on owner, occupier, and any other interest holders
Compliance period	Minimum 28 days after the notice takes effect; typically longer
Appeal window	Owner has the right to appeal to the Planning Inspectorate within the compliance period
Prosecution	Non-compliance after the notice takes effect is a criminal offence

The enforcement notice must specify the alleged breach, the steps required to remedy it, and the compliance period.

Appealing an Enforcement Notice

You have the right to appeal an enforcement notice to the Planning Inspectorate on a number of grounds, including that planning permission ought to be granted for the development, that the breach has not occurred, or that the compliance period is too short. An appeal suspends the effect of the notice until the appeal is determined.

Appeals are most commonly conducted by written representations, though hearings and public inquiries are also used for more complex cases. A planning consultant or specialist planning solicitor can advise on the prospects of success and prepare the appeal.

Enforcement Notices and the Four-Year / Ten-Year Rules

There are time limits on enforcement action:

**Four years**, for operations (building works) or a change of use to a single dwellinghouse, the LPA cannot serve an enforcement notice after four years have passed since the breach occurred
**Ten years**, for any other change of use or breach of planning condition, the limitation period is ten years

Once these time limits have passed, the development becomes lawful by efflux of time and a Certificate of Lawfulness can be applied for (see the separate guide on Certificates of Lawfulness on Property Passport UK).

Risks for Property Buyers

An outstanding enforcement notice is a serious encumbrance. It is registered as a local land charge and will appear in the Local Authority Search. It binds the land, not just the original owner, meaning a buyer who completes a purchase knowing of an unresolved enforcement notice takes on the obligation to comply.

Before exchanging contracts, your solicitor must review any enforcement notices revealed by the search and advise on the cost and feasibility of compliance. If a notice requires works to be demolished or use to cease, this can significantly affect value.