L'înformâtion et les sèrvices publyis pouor I'Île dé Jèrri
You'll always require planning permission to create or alter any means of access to your property where this falls within your domestic curtilage and opens onto a public road.
'Road' means a road, bridge, viaduct or subway which is repairable at the expense of the States or any parish, and includes the carriageway, footpath and any other part of such a road, bridge, viaduct or subway.
'Domestic curtilage’ is the area of land on which a dwelling house / flat sits and includes the residential land immediately around the building, which serves the building in some defined and meaningful way. It doesn't include a field or other open land next to a house, even if it's in the same ownership.