Invertebrate Surveys for Planning & Development
Planning-focused invertebrate surveys for brownfield, mosaic and sensitive habitats — clear evidence, practical guidance and predictable outcomes.
Do you need an Invertebrate Survey?
You may need an invertebrate survey if your site contains brownfield land, open-mosaic habitat, species-rich grassland, wet features or early-successional habitat. PEAs often highlight this potential early.
What is an Invertebrate Survey?
A targeted assessment of habitat and species value used to understand ecological constraints, planning risk and proportionate mitigation. It provides early clarity so your planning route stays predictable.
Early Signs an Invertebrate Survey is Needed
These indicators suggest your site might require more than a basic walkover and may attract LPA scrutiny:
- Possible refugia (rubble, log piles)
- wet areas, drainage ditches, ephemeral pools
- early-successional habitat, scrub or deadwood
- a PEA flagging invertebrate potential
- works planned between May–August
- adjacency to SSSIs, SINCs or reserves
Where these occur, planning applications without evidence frequently receive validation queries, requests for additional surveys or time-sensitive conditions.
What We Deliver
| Service | Purpose | Outcome |
|---|---|---|
| Preliminary Risk Assessment | Identify early constraints and confirm survey scope. | Clear recommendations on what you need — and what you don’t. |
| Walkover & Habitat Assessment | Locate features linked to notable invertebrate species. | Proportionate survey strategy aligned to risk. |
| Multi-Visit Invertebrate Surveys | Gather robust habitat and species data. | Evidence suitable for planning, design and mitigation. |
| Specialist Sampling (Netting, Pitfall, Sweep) | Provide species-level certainty where required. | Targeted data for practical mitigation. |
| Mitigation & Enhancement Planning | Integrate biodiversity with development needs. | Practical measures supporting BNG and compliance. |
We keep guidance clear and planning-ready — supporting predictable project delivery.
How it Works
Scope & Schedule
Share your site location and programme. We confirm the level of survey required based on habitat and planning context.
Fieldwork
Walkovers or multi-visit surveys depending on your sites potential.
Reporting
Clear, proportionate and planning-ready. Includes mitigation and BNG integration.
Timing & Survey Windows
High-potential sites missing these windows often face delays.
Securing survey capacity early keeps planning timelines predictable.
Main Survey Season
May to September
Specialist Surveys
Generally May to August
What You Receive:
- habitat assessment and risk rating
- species data (where required)
- planning-ready reporting
- practical mitigation strategies
- BNG and layout design input
- clear guidance for contractors
Clarity for planners. Stability for your programme.
Why Developers Choose ProHort:
- proportionate, risk-based approach
- clear planning guidance
- nationwide survey capability
- fast mobilisation during peak season
- straight, honest communication
- support from early scoping through BNG delivery
Legal Compliance & Planning risk
LPAs must request evidence wherever notable invertebrate species or high-value habitat may be affected. Missing or inadequate evidence often results in:
- validation delays
- requests for additional surveys
- pauses if species appear during clearance
- incorrect BNG scoring
- redesigns late in the programme
Relevant legislation includes:
- Wildlife and Countryside Act 1981 (Schedule 5 species)
- NERC Act 2006 (S41 species/habitats)
- Environment Act 2021 (BNG requirements)
- National Planning Policy Framework
- Local planning policy
We provide clear, proportionate and planning-aligned evidence across the UK.
Your Next Step
Need an invertebrate survey? We’ll confirm what’s required and align survey windows with your programme.
Phone: 0800 494 7479
Email: [email protected]
Areas We Cover
We cover many areas across England and Wales. Click below to find out more.
Case Note
Invertebrate Survey FAQs
What is an invertebrate survey for planning and development?
An invertebrate survey is an ecological assessment that identifies and evaluates invertebrate species present on a site, including insects, spiders, and other organisms without a backbone. These surveys support planning applications by assessing biodiversity value, identifying notable or protected species, and informing mitigation or enhancement strategies where required.
When is an invertebrate survey required for planning?
Invertebrate surveys are typically required where a site contains habitats of potential ecological importance, such as grassland, brownfield land, woodland edges, wetlands, or areas with high structural diversity. Local Planning Authorities may request these surveys where biodiversity impacts are likely or where preliminary ecological appraisal findings highlight invertebrate potential.
What types of habitats require invertebrate surveys?
Habitats that commonly require invertebrate surveys include:
• Species rich grassland
• Brownfield and previously developed land
• Wetlands and ponds
• Hedgerows and scrub
• Woodland edges and veteran trees
These habitats can support rare or priority invertebrate species and are often scrutinised during the planning process.
What does an invertebrate survey involve?
An invertebrate survey involves a combination of habitat assessment and targeted sampling methods. These may include sweep netting, pitfall trapping, hand searching, and visual inspections. The approach is tailored to the site and its habitats to ensure accurate identification of key species and ecological value.
What is the purpose of an invertebrate survey report?
The survey report provides a clear, planning ready assessment of the site’s invertebrate interest. It includes:
• Habitat descriptions and ecological context
• Species findings and conservation status
• Evaluation of ecological importance
• Recommendations for avoidance, mitigation, or enhancement
This information supports planning decisions and helps demonstrate compliance with biodiversity policies.
How do invertebrate surveys support Biodiversity Net Gain?
Invertebrate surveys help establish baseline ecological conditions and identify valuable habitats that contribute to biodiversity. This ensures that Biodiversity Net Gain calculations are accurate and that important invertebrate habitats are retained, enhanced, or appropriately compensated within development proposals.
Are invertebrates protected under UK legislation?
While most invertebrates are not individually protected, many species are listed as priority species under the UK Biodiversity Action Plan or are considered rare or notable. Their habitats can be material considerations in planning, particularly where development may result in biodiversity loss.
What time of year are invertebrate surveys carried out?
Invertebrate surveys are seasonally sensitive and are typically undertaken between spring and early autumn when species are most active. Multiple visits may be required depending on the target species and habitat type to ensure a robust assessment.
Can development proceed without an invertebrate survey?
If a site has ecological potential for supporting notable invertebrates, proceeding without a survey can lead to planning delays or refusal. Local Planning Authorities often require sufficient ecological evidence before validating or approving an application.
How do Local Planning Authorities assess invertebrate survey requirements?
Local Planning Authorities review ecological information submitted with planning applications and may request further surveys where necessary. Requirements can vary by region, and guidance is often available through the relevant authority, for example via the Planning Portal or your local council such as:
https://www.planningportal.co.uk/
What happens if important invertebrate species are found?
If notable or priority invertebrate species are identified, the development design may need to be adjusted. This could include habitat retention, creation of compensatory habitats, or implementation of long term management strategies to ensure biodiversity is maintained or enhanced.
How do invertebrate surveys reduce planning risk?
Undertaking an invertebrate survey early in the planning process provides clarity on ecological constraints. This reduces the risk of delays, redesigns, or additional survey requirements later in the project, helping to keep development programmes on track.
