Prior Approval for house extensions
The Government has changed Permitted Development rights so that householders can build larger extensions. However to do so, they must gain Prior Approval from the council before commencing work. This increase is from 3 metres to 6 metres for a terraced or semi-detached property, and 8 metres for a detached property. This legislation is now valid until 30 May 2019.
The new Prior Approval procedure requires a developer to provide some basic information about a proposed extension and involves a process of consultation with immediate neighbours. This process lasts 42 days. If you gain Prior Approval it does not necessarily mean your development is lawful, as there are other Permitted Development rules you must comply with (See Permitted Development Guide). Combining the extension with other development also might not be allowed, even if those developments have permission separately. The combination of developments may change the circumstances in such a way that permission or lawfulness would no longer be valid. The Council recommends you obtain a Certificate of Proposed Lawful Development.
To apply for Prior Approval please download the application form and read our guidance notes. Applications can be sent using the details in the contact us section.
- Householder Extensions Prior Approval Application form
- Validation requirements and helpful tips
- Guidance notes (Please Read before Applying)
Please note, smaller extensions, typically 3 metres or under for semi detached houses or 4 metres for detached houses do not need prior approval, but are subject to all relevant permitted development restrictions.
For office conversions, please see the further info section.