Natural England can provide advice on what species are protected by legislation, and what course of action should be taken. Your local planning authority should also be able to advise on any species or habitats that may be affected by your proposals.
Even when your development proposal benefits from permitted development rights, the legal protections for wildlife still apply.
Some houses may hold roosts of bats. The Wildlife and Countryside Act 1981 gives special protection to bats because of their roosting requirements.
Natural England must be notified of any proposed action (eg, remedial timber treatment, renovation, demolition and extensions) which is likely to disturb bats or their roosts. They must then be allowed time to advise on how best to prevent inconvenience to both bats and the owners.
Information on bats and the law can be obtained from Natural England.