In normal circumstances, it’s unlikely you’ll need planning permission to re-roof your house or to insert lights or skylights. The permitted development rules allow for alterations subject to the limitations and conditions below:

  • Any alteration to project no more than 150 millimetres from the existing roof plane.
  • No alteration to be higher than the highest part of the roof.
  • Side facing windows to be obscure-glazed; any opening to be 1.7m above the floor.

The permitted development regime for solar panels has different limits on projections and in relation to protected areas.