The Planning Portal
The easiest way to find out if you need planning permission is through the Government’s Planning Portal. This has:
- common examples of building projects
- advice on fees and charges
- matters you should think about before starting work
With all building work, the owner of the property (or land) in question is ultimately responsible for complying with the relevant planning rules and building regulations.
You should use the Planning Portal for guidance but you must decide for yourself whether your project requires planning permission. You should check whether previous planning permission has restricted your permitted development rights.
Lawful development certificates
If you think your project doesn't need planning permission but you want to be certain, you can apply for a Lawful Development Certificate (LDC). It is not compulsory to have an LDC but there may be times when you need one to confirm that the use, operation or activity named in it is lawful for planning control purposes. You can apply for a LDC online - see our section 'Apply for planning permission'.
Single storey rear extensions
Some single storey rear extensions do not need planning permission but you do need to notify us in writing before you start the work. You should read our page 'Single storey rear extensions' to find out more.