Protected species and planning: bats, newts, birds and other wildlife

 

Protected species can affect a planning application even where the site is not inside an SSSI, SPA, SAC or any other designated nature-conservation site. A house roof can contain a bat roost, a pond can support great crested newts, a hedge can be used by dormice or nesting birds, and rough grassland or a brownfield site can support reptiles and important invertebrates.

The planning issue is not simply whether wildlife has been seen on the site. The local planning authority needs enough information to understand whether protected species are likely to be present, how the development could affect them, and whether the impact can be avoided, mitigated or compensated.

Planning permission does not cancel wildlife law. A development can have full planning permission and still need a separate Natural England or Defra licence before particular works can lawfully start.

 

Protected species are a planning issue in their own right

 

Natural England’s protected-species standing advice is a material planning consideration for local planning authorities in England. It is designed to help councils decide applications where protected species may be affected without consulting Natural England on every individual case.

The council should consider protected species where suitable habitat exists, where records suggest a species may be present, or where the proposed development creates a realistic impact pathway. An absence of existing records does not prove that a species is absent; it may simply mean nobody has previously surveyed the site.

This is separate from the protected-site regime. If the proposal also affects an SSSI or requires Habitats Regulations Assessment, further duties and consultation requirements apply.

 

Different species have different legal protection

 

There is no single Protected Species Act. The relevant protection depends on the species.

• Bats, great crested newts and hazel dormice are examples of European protected species protected under the Conservation of Habitats and Species Regulations 2017, with additional protection for some activities under the Wildlife and Countryside Act 1981
• Wild birds are protected under the Wildlife and Countryside Act 1981, including protection for nests while they are in use or being built. Schedule 1 species receive additional protection from disturbance
• Reptiles are not all protected in the same way. Smooth snakes and sand lizards are European protected species; adders, grass snakes, common lizards and slow worms have more limited but still important protection under the Wildlife and Countryside Act 1981
• Water voles are protected under the Wildlife and Countryside Act 1981
• Badgers and their setts are protected principally by the Protection of Badgers Act 1992
• Other protected or priority wildlife can include otters, beavers, natterjack toads, white-clawed crayfish, protected plants, fungi, lichens and certain invertebrates and fish

The practical consequence is that the ecologist and planning authority need to identify the particular species, protection and likely impact. A generic statement that a site has ‘wildlife value’ is not enough.

 

When should you commission an ecology survey?

 

Early. Ideally before the planning layout becomes fixed.

A Preliminary Ecological Appraisal (PEA) can identify whether the site contains habitats capable of supporting protected species and whether more detailed work is needed. Natural England advises councils to ask for a survey where suitable habitat exists, where protected species are likely to be present and affected, or where species are present but the effect is uncertain.

Some surveys can be undertaken throughout the year, but others have narrow seasonal windows. Our Ecological Survey Calendar sets out the main Natural England survey windows for bats, great crested newts, birds, dormice, reptiles, water voles, badgers and other species.

Natural England also says LPAs should not usually use a planning condition simply to postpone basic protected-species survey work until after permission. The authority normally needs enough evidence to assess the impact before it makes the decision.

 

Common development scenarios

 

Roof works, loft conversions and demolition

Older houses, barns, churches, outbuildings and other structures can provide bat roosts and nesting-bird habitat. A small domestic project can therefore raise protected-species issues even where the planning impact looks modest.

Bat issues are not limited to visible bats. Roosts and their access points can be protected even when bats are not physically present at the moment works take place. Lighting around buildings, trees, hedges and water can also affect bat commuting and foraging habitat.

Ponds, ditches and great crested newts

Natural England’s standing advice tells LPAs to consider great crested newts where suitable water bodies and connected terrestrial habitat occur around a development. The familiar 500 metre figure is a screening consideration, not a rule that every pond within 500 metres automatically requires the same survey or prevents development.

In areas with District Level Licensing, developers may be able to use a strategic licensing route rather than the traditional site-by-site survey, mitigation and compensation process. The appropriate route should be considered before commissioning unnecessary seasonal work.

Hedgerows, scrub and woodland

Hedgerows and scrub can support nesting birds, bats, dormice, reptiles and other species. Woodland can also overlap with separate planning protection for ancient woodland, ancient trees and veteran trees.

The presence of a hedge does not automatically prove dormice are present, but Natural England advises that woodland, hedgerow and scrub impacts can justify dormouse survey where the species could occur.

Rough grassland and brownfield sites

Previously developed land is not ecologically empty by definition. Rough grassland, scrub mosaics, rubble, bare ground and unmanaged corners can support reptiles, invertebrates, nesting birds and other protected or priority species.

This is an important distinction from the planning definition of previously developed land. A site can be brownfield in planning terms and still have substantial ecological interest.

Rivers, streams, ditches and wetlands

Watercourses can raise issues involving water voles, otters, beavers, fish, crayfish and other aquatic species. The development may affect them directly through bank works or indirectly through lighting, pollution, hydrological change, noise, access or habitat fragmentation.

 

The mitigation hierarchy: avoid first

 

National planning policy and Natural England’s standing advice use the mitigation hierarchy. In practical terms the order is:

1. Avoid the impact where possible
2. Mitigate the impact where avoidance is not possible
3. Compensate as a last resort where residual harm remains

This matters at design stage. Retaining a roost, pond, hedge, watercourse buffer or connected habitat can be more robust and less expensive than designing the feature out and then trying to replace its ecological function later.

Ecology therefore should not be treated as a report-writing exercise carried out after the architect has finished. It can be a site-layout constraint in the same way as access, flood risk, trees or heritage.

 

Planning permission and wildlife licences are separate

 

This is one of the most important points on the page.

Natural England states that protected-species licensing requirements are in addition to planning permission. Where the development would otherwise involve an unlawful act, the developer may need a wildlife mitigation licence before carrying out the affected works.

For protected animals and plants, including European protected species, the developer needs to check that the relevant licensing tests can be met:

• whether the activity is for an authorised purpose
• whether there is no other satisfactory solution that would cause less harm to the species
• whether the development would avoid harming the long-term conservation or survival of the licensed species

Where a licence is expected to be necessary, the local planning authority should consider whether the licence is likely to be obtainable before granting planning permission. A permission that cannot lawfully be implemented because the licensing tests cannot be met is of little practical use.

A protected-species licence will not generally be issued until relevant planning conditions which are intended to be, and are capable of being, discharged before development begins have been discharged.

 

Environmental Delivery Plans can provide a different route

 

The Nature Restoration Fund and Environmental Delivery Plan regime can also apply to protected species. Where a made EDP specifically covers a protected species and the relevant development impact, the EDP can set out the terms of a species licence which is treated as having been granted, together with how the licensing tests are met. A developer using that EDP can then rely on it in the planning application in place of the ordinary project-specific species licence for the environmental feature covered by the plan.

This is not a general replacement for wildlife licensing. The EDP must actually be in force and cover the particular species, impact, development type and area. Other species or impacts remain subject to the ordinary legal regime. The Government’s initial EDP programme is focused on nutrient pollution; it says further detail on potential great crested newt EDPs will follow, building on the evidence from District Level Licensing.

See the Government’s Nature Restoration Fund implementation plan and our guide to Environmental Delivery Plans.

 

Wild birds are slightly different

 

All wild birds are protected under the Wildlife and Countryside Act 1981. It is an offence, among other things, to take or destroy eggs or to take, damage or destroy a nest while it is in use or being built. Schedule 1 birds receive extra protection from disturbance around nests and dependent young.

Natural England’s planning guidance makes an important point: it cannot issue a wild-bird licence simply to allow development to proceed. In many ordinary projects the practical solution is therefore to programme vegetation clearance or building work to avoid active nesting, backed by appropriate ecological checks where necessary.

The familiar phrase ‘bird nesting season’ is a useful planning shorthand but not a statutory fixed date range. Species can nest outside the usual spring and summer period. The legal question is whether a protected nest is active, not whether the calendar says February or September.

 

Reptiles do not all have the same protection

 

It is also wrong to treat ‘reptiles’ as one legal category. Natural England distinguishes smooth snakes and sand lizards, which are European protected species, from the more widespread native species such as adders, grass snakes, common lizards and slow worms, which have more limited protection under the Wildlife and Countryside Act.

That affects licensing and mitigation, but all native reptiles are relevant to biodiversity planning and suitable habitat can justify survey and avoidance or mitigation measures.

 

BNG does not buy your way out of protected-species law

 

Biodiversity Net Gain and protected-species protection are related but legally different.

A development can achieve the required BNG percentage and still be unacceptable or unlawful because it would destroy a bat roost, harm great crested newts or interfere with another protected species. Conversely, a carefully designed protected-species mitigation scheme does not by itself satisfy statutory BNG where BNG applies.

The same distinction applies to HRA. HRA protects particular designated habitats sites; a protected species on development land can require separate assessment and licensing even where HRA is not engaged.

 

Can a council make the application invalid without a survey?

 

Potentially, but the route matters.

A council can have biodiversity and ecology requirements on its local validation list. Whether a missing report makes the application invalid depends on the legal and local-list tests explained in our guide to planning application validation requirements.

Do not confuse validation with determination. Even if an application is technically valid without a particular ecology survey, the LPA can still be unable to approve it because the information is insufficient to assess protected-species effects.

Natural England expressly advises LPAs not to decide applications until the necessary surveys are available.

 

What should an applicant do?

 

1. Identify habitats before fixing the design. Buildings, ponds, hedgerows, trees, scrub, rough grassland, watercourses and brownfield mosaics can all matter
2. Use a competent ecologist. Some survey methods require appropriate licences as well as professional competence
3. Check the survey calendar immediately. A missed seasonal window can control the whole planning programme
4. Design to avoid harm where possible. Retention and buffers are often preferable to complex compensation
5. Check whether a strategic route applies. Great crested newt District Level Licensing is the obvious current example, with EDP routes capable of covering protected species in future
6. Submit enough information for the planning decision. Do not assume basic survey work can always be conditioned until later
7. Check the wildlife licence separately. Planning permission is not normally the licence unless an applicable EDP modifies that requirement for the covered species impact
8. Recheck ecology before works start. Species use and site conditions can change between application and construction

 

Key sources

 

• Natural England and DEFRA: Protected species and development – advice for local planning authorities
• Natural England: bats – advice for making planning decisions
• Natural England: great crested newts – advice for making planning decisions
• Natural England: wild birds – advice for making planning decisions
• Natural England: reptiles – advice for making planning decisions
• Natural England: badgers – advice for making planning decisions
• Natural England: hazel dormice – advice for making planning decisions
• Natural England: water voles – advice for making planning decisions
• Government: Nature Restoration Fund implementation plan

Conservation, Heritage & Protected Sites

 

Protected Species Page Added: 21st August 2026 | Updated: 3rd September 2026