Sign In

My Neighbourhood

Use your postcode to find local councillors, facilities, school catchment areas and more.

Find facilities in my area

Cardiff Council

Do I need planning permission

​​​​You will need planning permission if you want to alter a building, piece of land or a permanent structure (such as a wall) and you need to carry out building work to do it. You will also need planning permission if your work will change the way the building or land is used.


Apply for planning p​ermission.


You will usually need planning permission to: 

  • build a new building
  • extend or alter an existing building
  • make changes to the way a building is used, for example turning a house into flats or making an industrial building into a home
  • undertake engineering work or other works, such as sewerage
  • demolish a building or structure
  • carry out work on a listed building
  • carry out work in a conservation area
  • carry out work on protected trees or trees in a conservation area
  • build new agricultural buildings.


The Planning Application Wales website​​​​​​​​​​​External link opens in a new window has more information to help you find out what type of planning permission you need, including:Electronic applications for planning permission

  • learn about the planning system
  • find out about a development
  • appeal against a planning decision
  • research the latest government policy
  • read and download help guide
  • forms and other documents

Permitted developments where you don’t need planning permission 

There are some minor improvements, alterations and extensions you can make to your house that you don’t need planning permission for. These can include construction of some types of porch, glass conservatories under a certain size and also some internal changes. 

We call these permitted developments. You can get more advice about permitted developments and download an information booklet from the Welsh Assembly Gov​​ernment​​​​​​​​​​​External link opens in a new window or from the national Planning Application Wales site​​​​​​​​​​​External link opens in a new window.


Other ways to check if you need planning permission ​

If you are still unsure if you need planning permission, you can: 


If you require advice, please see Pre Application enquires.
© 2022 Cardiff Council