Certain types of extensions and alterations can be carried out without the need to apply for planning permission under what are called "permitted development" rights. However, please note separate approval under building regulations or listed building consent may be required even where planning permission is not required.
Check if you need planning permission
Pre-application advice is a way of finding out whether a specific proposed development would be likely to be acceptable and what the key issues will be before the submission of a formal application. How to contact us for pre-application advice.
Building regulations approval
You may require separate building regulations approval where planning permission is not required.
Listed buildings consent
You may require separate listed building consent where planning permission is not required.
Please note if you build something which needs planning permission without obtaining permission first, you may be forced to make changes later. This could prove problematic and sometimes costly and may even result in legal action to require removal of the unauthorised works.