What Happens if Protected Species are Found on Site?

When planning a development project, one of the most common concerns for landowners and developers is what happens if protected species are discovered during ecological surveys.

In the UK, many animals and plants are protected by law. If they are present on a development site, it does not automatically mean your project cannot proceed. However, it does mean the planning process must carefully consider how those species and their habitats will be protected.

Understanding what happens next can help avoid delays, ensure legal compliance, and keep your planning application moving forward.

Protected species are safeguarded under UK legislation designed to protect the natural environment and conserve important habitats and wildlife populations.

Key legislation includes the Wildlife and Countryside Act 1981, the Conservation of Habitats and Species Regulations, and the Protection of Badgers Act 1992. These laws make it illegal to kill, injure, capture, or deliberately disturb certain protected animals. They also prohibit damaging or destroying breeding sites or resting places.

Because of these legal protections, local authorities must consider the presence of protected species when assessing a planning application. If ecological impacts are not properly addressed, planning permission may be delayed or refused.

Protected species are usually identified through ecological surveys carried out by qualified ecologists as part of the planning process.

These surveys often begin with a Preliminary Ecological Appraisal (PEA), sometimes called a walkover survey. During this stage, an ecologist assesses the habitats on a site and identifies whether there is potential for protected species to be present.

If suitable habitats are found, additional protected species surveys may be required. These might focus on species such as:

• Great crested newts in breeding ponds
• Bats roosting in buildings or mature trees
• Badgers and their setts
• Water voles along rivers, streams, or ditches
• Reptiles in rough grassland or scrub habitats

These surveys help confirm whether protected animals are present and determine how development could affect them.

If ecological surveys confirm the presence of protected species, the next step is usually to assess how the proposed development could affect them and identify ways to reduce potential impacts.

Finding protected species does not automatically prevent development. In many cases, projects can proceed with the right ecological advice and mitigation measures in place.

An ecologist will normally prepare an ecological report outlining the survey findings and recommending appropriate steps to protect the species and their habitats. This report is submitted alongside the planning application so the local authority can assess the environmental impacts.

Where protected species are present, mitigation measures are typically introduced to ensure the development complies with environmental legislation.

Mitigation may include:

• Adjusting site layouts to avoid important habitats
• Timing construction work to avoid breeding seasons
• Creating new habitats such as ponds, grassland, or woodland
• Installing bat boxes, bird boxes, or other wildlife features
• Carefully relocating species under specialist supervision

In some cases, a formal mitigation plan is required. This document explains how ecological impacts will be avoided, reduced, or compensated for throughout the development.

These measures allow development to proceed while protecting biodiversity and supporting the conservation of important species.

One of the biggest impacts of protected species is on project timelines rather than whether development can occur.

Many ecological surveys must be carried out during specific seasons when species are active and easier to detect. For example, surveys for great crested newts are typically conducted between spring and early summer, while bat activity surveys take place during warmer months.

If these seasonal windows are missed, surveys may need to wait until the following year. This is why ecological advice early in the planning process is strongly recommended.

Early surveys allow potential ecological issues to be identified and managed before they become costly delays.

What counts as a protected species in the UK?

Protected species are animals and plants that receive legal protection under legislation such as the Wildlife and Countryside Act 1981 and the Conservation of Habitats and Species Regulations. Common examples include bats, great crested newts, badgers, dormice, water voles, and certain reptiles and birds.

Can planning permission be refused if protected species are present?

Yes. If a planning application does not properly consider protected species, a local authority may delay or refuse permission. However, development can often still proceed if ecological surveys are completed and suitable mitigation measures are proposed.

How long can protected species surveys take?

Survey timelines depend on the species and the time of year. Many surveys can only be carried out during specific seasonal windows. If these are missed, surveys may need to wait until the following survey season.

Can development still go ahead if protected species are found?

Yes, in most cases development can still proceed. Ecologists will usually recommend mitigation measures such as habitat creation, timing works carefully, or relocating species under licence to ensure legal compliance.

Discovering protected species on a development site can initially feel like a setback, but with the right ecological guidance it is usually manageable.

Early ecological surveys help identify potential issues before designs are finalised or planning applications are submitted. This allows developers to incorporate mitigation measures from the outset, reducing the risk of delays and unexpected costs later in the process.

Working with experienced ecological consultants ensures that both development goals and environmental responsibilities are properly balanced.

Navigating ecological requirements during the planning process can sometimes feel complex, particularly if protected species are discovered on site. Seeking professional ecological advice early can make the process far smoother.

Collington Winter provides a range of ecological services to support planning applications, including Preliminary Ecological Appraisals, protected species surveys, ecological impact assessments, and mitigation planning. Our experienced team works closely with clients, planners, and local authorities to ensure ecological requirements are clearly understood and addressed.

By identifying ecological constraints early and providing practical solutions, we help projects move forward while ensuring compliance with environmental legislation.

If you are planning a development project and need ecological advice, our team would be happy to help. You can contact Collington Winter via info@collingtonwinter.co.uk or with our on-page enquiry form to discuss your site and arrange the appropriate surveys to support your planning application.