What Happens If You Disturb or Destroy a Bat Roost (and How Not To!)
Bat roosts are protected in Scotland, and for good reason. Bats rely on safe, stable roosts at every stage of their life cycle. If a roost is disturbed or damaged, the consequences can be serious. Many people are unaware that roost protection applies all year, whether bats are present or not.
This blog explains why disturbing a bat roost is taken seriously, the severity of potential penalties, and the correct steps to follow if you unexpectedly encounter bats during work.
Roosts are protected by law
In Scotland, bats and their roosts are protected under the Conservation of Habitats and Species Regulations 2017 (as amended in Scotland) and the Wildlife and Countryside Act 1981. These laws make it an offence to disturb bats or damage or destroy their roosts.
This legal protection is strict because roosts are essential to survival. A roost used in summer may also be important in winter or the following year.
What counts as disturbing or damaging a roost?
Disturbance or destruction can happen when:
roof materials, soffits, or tiles used by bats are removed
access points are blocked
tree cavities or crevices are cut, pruned, or felled
lighting changes affect roost entrances
noise or vibration occurs close to sensitive roosts
works take place during periods when bats or pups cannot move away safely
These impacts can occur during small jobs as well as major projects.
Accidental harm is not a defence
A common misconception is that accidental disturbance is acceptable if you “didn’t know” bats were there. This is not true. Under Scottish law, accidental harm is not a defence, and roosts remain protected regardless of intent.
If you discover bats or a suspected roost during work, the only lawful and responsible action is to:
Stop work immediately
Withdraw from the area
Contact a licensed ecologist as soon as possible
An ecologist can assess the situation, arrange any required surveys, and advise whether a licence is needed before work can continue.
What may happen if a roost is disturbed or destroyed
The consequences vary depending on the severity of the impact, but can include:
1. Harm to bats
Disturbing a roost can injure or kill bats, especially during maternity season when pups cannot fly.
2. Project delays
Work may need to pause while ecologists assess the situation and determine next steps.
3. Significant penalties
Courts can issue substantial fines for offences involving bat roosts. Penalties can reach several thousands of pounds per offence, and may increase if multiple bats or roosts are affected. In serious cases, enforcement action may extend beyond financial penalties.
(This is not legal advice; penalties depend on individual circumstances.)
These outcomes are preventable when surveys and advice are sought early.
How to avoid problems in the first place
The most effective way to stay within the law is to speak to an ecologist early, especially before:
roof repairs
loft conversions
repointing stonework
tree works
demolition or extension work
Early checks are simple, cost-effective, and prevent unexpected issues. Ecologists will explain whether surveys are needed and, if so, help plan them within the May–September survey season.
Responsible action protects everyone
Roost protection is not designed to block development. Instead, it ensures that projects proceed safely, lawfully, and without harming bats. Most work can continue once the correct surveys, mitigation, and licensing (if needed) are in place.
By stopping work immediately if a roost is found and seeking expert advice as early as possible, you protect your project, stay compliant, and help Scotland’s wildlife thrive.
References
Bat Conservation Trust 2023. Bat Roosts in Buildings. Bat Conservation Trust, London.
NatureScot 2020. Bats: Licensing and Guidance. NatureScot, Inverness.
Scottish Government 2019. Wildlife Crime and Protected Species. Scottish Government, Edinburgh.