Any development which requires planning permission and does not have that permission, or which is going ahead in breach of the specific conditions set out in its planning permission, is classed as 'unauthorised development'.
The carrying out of unauthorised development is an offence and any person who has carried it out may be subject to enforcement proceedings. Enforcement is simply the planning authority's way of making sure that unauthorised development becomes compliant with planning law.
Planning enforcement action can only be taken when something has been done without the appropriate permission or consent. It is important to appreciate that planning enforcement action cannot be taken if the work carried out does not require permission/consent in the first place, such as:
- A change of use of a structure where the change is not material
- Developments of a minor nature, such as a small extension to a house or the installation of solar panels on the roof of your house.
There are usually certain thresholds relating to, for example, size or height. Where these thresholds are exceeded, the exemptions no longer apply.