Bats and buildings

Many bats have adapted to roosting in buildings

Features such as roof voids, gaps between slates, cracks and crevices in the walls, gaps under facia boards, lead flashing and into the soffits can all be suitable for roosting bats.

National and European legislation requires landowners and developers to carry out a bat survey prior to modification or demolition of buildings suitable for roosting bats. Our staff has undertaken extensive training to allow us to assess a building’s potential for roosting bats.


All buildings are inspected on the inside and outside during daylight hours by a bat worker with the aid of strong torch light and an endoscope (if required) to look for evidence of roosting bats. This includes; roosting bats, dead bats, droppings, feeding remains, scratch marks and urine staining. Particular attention is paid to any cracks, crevices and holes in walls, roofs and ceilings. Visual inspections can be conducted at any time of year; but all buildings assessed as having high potential for roosting bats should have a bat activity survey conducted between May and September inclusive.