Do I Need Planning Permission for a double storey extension?

Permitted Development Rights

Permitted development rights allow certain types of work to be carried out without needing planning permission, provided specific conditions are met:

1. Size and Scale:

   • The extension must not extend more than 3 metres from the original rear wall for semi-detached or terraced houses, or 4 metres for detached houses.
   • The overall height of the extension must not exceed the height of the highest part of the existing roof or be higher than 7 metres from ground level.

2. Location:

   • The extension must be at least 7 metres away from the rear boundary.
   • It must not extend beyond the front or side elevation of the house that faces a highway.

3. Roof Design:

   • The roof pitch of the new extension should match the existing house.

4. Materials:

   • The materials used in the extension must be similar in appearance to those used in the existing house.

5. Restrictions:

   • No balconies, verandas, or raised platforms are allowed without planning permission.

6. Designated Areas:

   • In certain areas, such as conservation areas additional restrictions may apply, or permitted development rights might be more limited.
7. For further information on what is considered permitted development, please see here: https://www.4dplanning.com/what-is-permitted-development-