Loft Conversions

Planning permission for Loft Conversions

Listed below are permitted developments, presented in summary form.
This is a brief overview: please contact us for specific advice

Planning permission for loft extensions


Rear loft extensions are considered permitted development providing they conform to the following:

  • The additional roof volume created should not exceed 40m3 for attached houses and 50m3 for detached & semi-detached houses (the original house).
  • The additional roof construction must NOT exceed the existing height of the roof or the original house.
  • Any window on the side elevation must NOT be opening below 1.7m from the finished floor level and have obscured glazing.
  • The additional roof construction must be set back at least 200mm from the face of the external wall, distance measured along the roof plane.
  • Balconies, Verandas or raised platforms are NOT permitted.


Front loft extensions are NOT permitted development.


Side loft extensions are NOT permitted development.


Permitted development rights are NOT available on designated land, such as Conservation Areas, World Heritage Sites, National Parks, Areas of Outstanding Natural Beauty and National Parks.

Works on lofts may affect bats, should evidence of bats exist a specialist survey will be required.

This is not an exhaustive list and you should always seek advice before the commencement of any works. Contact us here