Homeowners are being warned that common renovation projects such as roof repairs, loft conversions or even gutter work could unintentionally break strict wildlife protection laws.
Ecologists at Arbtech, one of the UK’s leading ecological consultancies, are urging property owners to check for bats before starting any building works. In late summer and early autumn, bats begin mating and preparing for hibernation, making lofts and roof spaces particularly attractive for roosting.
In the UK, all bat species and the places they roost are protected under the Conservation of Habitats and Species Regulations 2017. Disturbing or destroying a roost is a criminal offence, regardless of whether it is currently occupied. Penalties can include fines of up to £5,000 per bat and prison sentences of up to six months.
A spokesperson for Arbtech explained: “Summer is a peak time for both home improvements and bat activity, which can be a dangerous combination if people aren’t aware of the laws. It’s not just about avoiding penalties. Disturbing a roost during the breeding season can devastate an entire local bat population. Even if you don’t see bats, they could be present, and you could still be committing a criminal offence by damaging their habitat, so it’s crucial to check for bats before any work begins, no matter how small the job may seem.”
Why roof spaces are at risk
Bats feed heavily in late summer and early autumn as they prepare for hibernation, making roofs and lofts an appealing habitat. Many homeowners remain unaware of how common bat roosts can be, especially in older or rural properties. As a result, ordinary DIY or building projects risk damaging protected roosts.
Signs that bats may be present
Arbtech advises homeowners to look out for the following indicators before beginning work:
Droppings: Resembling mouse droppings but crumbling into dust when touched, often found beneath entry points or within lofts.
Strange noises: Chittering, squeaking or rustling, especially around dusk and dawn.
Oily and greasy marks: Dark stains left around gaps in roof tiles or eaves.
Sightings at dusk: Bats emerging from loft spaces in the evening is a clear sign of a roost.
Scratches on walls: Marks on beams, rafters or near crevices where bats cling.
Odours: A strong, musty smell, particularly during maternity season when numbers increase.
By checking for these signs, property owners can avoid the risk of committing an offence and ensure roosts are preserved.
