Report a breach of the planning regulations
Many residential extensions are ‘permitted development’ and do not require planning permission.
Guides on what is permitted, including an interactive house tool for you to check, are available on the Planning Portal.
Before reporting an alleged breach of planning, you should also check whether express planning permission has already been obtained.
If you suspect a breach of planning has taken place then please tell us.
The better the quality and detail of the information you provide, the more likely it is that the team will be able to investigate the matter.