Wildlife

Bat Roost Conservation in Buildings

Many bat species depend on buildings for maternity and hibernation roosts, and construction or renovation work can devastate entire colonies.

Key Facts

18 of the 17 UK bat species use buildings at some point in their life cycle
Maternity colonies may return to the same roost site for decades
Bats are protected by law in most European countries, requiring surveys before renovation
Licensed bat workers can design mitigation that maintains roosts during building work

Welfare Considerations

Disturbance of maternity roosts during June-August can cause mothers to abandon pups. Inappropriate exclusion during hibernation can trap or expose bats to lethal cold. Deaths of individual bats from roost destruction accumulate at population level for slow-reproducing species with single annual young.

What You Can Do

Arrange bat surveys before any building work involving roofs or loft spaces
Time external works to avoid maternity season when possible
Install purpose-built bat boxes on buildings losing roost access
Report roost disturbance to wildlife crime officers