Is planning permission required?
Since 2008, hip to gable loft conversions are within Permitted Development rights. A permitted development means you don’t have to apply for planning permission. This permitted development rights only covers residential houses, not flats or maisonettes. You need to have your planning drawings ready to apply for a corticated of lawfulness (COL). This certificate is for you if you wish to ascertain that the conversion is legal under permitted development.
Even if you have the permitted development rights, there are some considerations and limitations you have to adhere to and your planning drawings for hip to gable loft extension should indicate that you comply with the considerations and limitations to get the COL from your council for your loft conversion. Note that you are required to have:
- A volume of allowance of 50 cubic metres additional roof space for detached and semi-detached houses.
- A volume of allowance of 40 cubic metres additional roof space for terraced houses.
This volume allowance includes any previous roof extensions done by you or the previous owner on the roof. Since almost every successful hip to gable loft conversions achieve an extra 60 cubic metres exceeding the volume allowance of 50 cubic metres, you may need planning permission for your hip to gable loft extension if you want to create as much space as possible.
If you do not know if you require planning permission or you have any doubt or suspicion, you have to check with your local council and have the details of hip to gable permitted development just so you do not run into any legal problems.