The government has changed Permitted Development rights. Householders can now build larger extensions. However before starting your project you must get prior approval from the council.
The increase is from 3 metres to 6 metres for a terraced or semi-detached property. It is 8 metres for a detached property. Completion means practical completion. This is when the walls, roof, doors, and windows are done, and the building is watertight.
The procedure requires the developer to provide basic information about the extension. It also requires consulting with immediate neighbours. This process can last 42 days.
Approval does not make your development lawful. You must follow other rules on permitted development. Combining the extension with other developments might not be allowed, even if they have separate permissions.
It's because the changes may make it unlawful. We recommend you get a Certificate of Proposed Lawful Development.
Apply for prior planning approval
To apply for prior planning approval:
- submit your application on the Planning Portal website
- You will need to log in or register for a planning portal account
Postal applications can be sent to our Planning and Building Control Team.
Smaller extensions, up to 3 metres for semi-detached houses and 4 metres for detached ones, do not need prior approval. But, they are subject to all permitted development rules.