Bat Roost Exclusions: Welfare Standards in Building Work

Bat roost exclusions during building renovation require licensed supervision and species-appropriate timing. Understanding the legal and welfare framework protects both bats and property owners.

Key Facts

All bat species and their roosts are protected under the Conservation of Habitats and Species Regulations 2017
Roost exclusions can only be conducted under a European Protected Species licence
Timing of exclusions must avoid hibernation (October-March) and maternal roost periods (May-August)
Replacement artificial roost features must be provided to offset lost roost capacity
Ecological surveys by licensed ecologists are required before works affecting potential roosts
Prosecution for bat roost destruction can result in fines and imprisonment

Welfare Considerations

Bat roost exclusions, when conducted correctly, represent a welfare-acceptable approach to building works affecting bats. Bats excluded at appropriate times outside hibernation and maternal periods can relocate to replacement roosts. Exclusions during hibernation disrupt torpor, causing bats to burn essential fat reserves and potentially die. Exclusions during maternal periods orphan dependent pups. Licensing requirements exist precisely to prevent these welfare harms.

What You Can Do

Commission ecological surveys before any building works affecting old structures
Follow Natural England guidance on bat mitigation timing and replacement roost features
Report bat roost destruction to the relevant statutory authority