I spoke with the local council and they said permission wouldn't be needed, I would just need to inform them that it was now being used for residential purposes rather than commercial. (money.stackexchange.com)
The agent providing the rental insurance quote will also need to be told whether the rental space will be used for private residential purposes or for commercial activities. (rentersinsurance.net)
Most islands will be used for residential purposes, with between 100 and 500 houses and apartments. (newscientist.com)