Do I need permission for an extension?

The planning rules covering extensions are explained in this section on the Planning Portal¹.

You may also find our extensions mini guides useful, they illustrate visually what is covered in our text guidance:

• Extensions guide (single storey)²
• Extensions guide (two storey)³

If, after using our site guidance, you have further questions about a particular aspect of planning permission you should contact your local planning authority, usually your council. Our Service Desk aren’t planning experts so you will need to talk to your local authority planning team.

You can find contact information for your local planning authority on the Planning Portal: 

Find your local planning authority ^{(https://www.planningportal.co.uk/find-your-local-planning-authority)}

1. https://www.planningportal.co.uk/permission/common-projects/extensions/planning-permission
2. https://interactive.planningportal.co.uk/mini-guide/extensions-single-storey/0
3. https://interactive.planningportal.co.uk/mini-guide/extensions-two-storey/0