Surrey BNG / County planning guidance
Biodiversity net gain in Surrey starts with the right council requirements, habitat evidence and delivery plan. Use this guide to check local validation, the published nature recovery strategy and your next planning step.
A site in Guildford, Woking, Reigate, Epsom or the Surrey countryside may face different planning policies and habitat constraints. ACP helps project teams assemble surveys, statutory metric calculations, practical mitigation and evidence for the correct planning stage.
Reviewed 7 November 2026 · Surrey LNRS published March 2026 · Two new unitary councils scheduled for April 2027
6 August 2026 changes / national law
For most qualifying planning permissions, statutory Biodiversity Net Gain (BNG) means demonstrating at least 10% additional biodiversity value compared with the pre-development baseline. However, the correct answer depends on the planning route, red-line area, application date, onsite habitat and transitional arrangements. Do not assume that every Surrey project needs a full metric or that every small project is exempt.
For eligible planning applications submitted on or after 6 August 2026, developments on red-line sites no larger than 0.2 hectares may be exempt where no onsite priority habitat is impacted. The exemption is not simply based on the proposed building footprint.
A qualifying whole-development temporary permission of five years or less may be exempt from the same date where no onsite priority habitat is impacted. The separate de minimis, householder and other statutory rules have different tests. Transitional and section 73 applications need care.
The former self/custom-build exemption has been removed for new applications from 6 August 2026. In addition, the biodiversity gain hierarchy for eligible non-major schemes changed, but statutory credits remain the last resort. Check the current exemptions guidance and ACP exemptions guide before commissioning unnecessary work or claiming an exemption.
Keep the dated application form, red-line plan and evidence about priority habitat. A qualifying exemption does not remove protected species, protected site, tree or other ecological planning obligations.
Use the correct statutory metric, describe the baseline and proposed habitat, assess the gain hierarchy and plan for any relevant 30-year habitat management and monitoring duties.
11 current local planning authorities / 2027 transition
Surrey's county-level guidance is not a substitute for the local planning authority. At 7 November 2026, 11 district and borough councils still handle most district planning applications. Their BNG pages, adopted plans and validation lists vary. Surrey County Council also determines certain county-matter applications, notably minerals and waste. Therefore, identify the correct authority from the site and application type.
From 1 April 2027, West Surrey and East Surrey unitary authorities are scheduled to replace the current county and district council arrangement. Those future structures should not be used as the current determining authority for a November 2026 application. The groups below show future alignment while naming today's councils.
| Current council | BNG planning guidance | Evidence |
|---|---|---|
| Elmbridge | Check BNG information with the application and the live local validation checklist; confirm the baseline and metric. | Council BNG and validation guidance |
| Epsom and Ewell | The council identifies no adopted local BNG percentage. A proposed Local Plan policy is not an adopted requirement. | Council biodiversity page and emerging plan |
| Mole Valley | Adopted EN9 states 20%, but the council's current BNG page now requires the national 10% minimum following the August 2026 NPPF. | Adopted EN9; current BNG page |
| Reigate and Banstead | The council explains statutory 10% and current exemptions. Check the particular application's validation requirements. | Council guidance/FAQ |
| Tandridge | The council publishes a local validation checklist and a biodiversity checklist. However, its BNG webpage retains older exemption wording; use current national rules. | Council BNG guidance; validation checklists |
| Current council | BNG planning guidance | Evidence |
|---|---|---|
| Guildford | Council material has referred to 20%; the August 2026 NPPF restricts blanket requirements above 10%. Check any qualifying site allocation. | Council biodiversity guidance and NPPF |
| Runnymede | Apply the national statutory requirement and relevant Local Plan ecology policies; verify the latest borough checklist. | Confirm with current local validation documents |
| Spelthorne | Council guidance describes the statutory 10% approach and local delivery hierarchy. | Council BNG guidance |
| Surrey Heath | For applicable planning applications the council asks for a Biodiversity Statement and supporting metric evidence. | BNG page and local validation list |
| Waverley | Current national 10% baseline applies to qualifying schemes; older checklist language may predate statutory commencement. | Council validation guidance; national rules |
| Woking | The live application page links to its February 2024 validation checklist. Use that submission route alongside current national BNG rules; no newer checklist edition was verified. | Live submission page and linked checklist |
The comparison records official wording and source types; it is not a promise that the same policy applies to every application. Where older local guidance differs from newer national rules, the applicant should ask the local planning authority to confirm the applicable adopted policy and transitional position. The reorganisation order is available via legislation.gov.uk.
Statutory baseline / adopted plan / 2026 NPPF
The statutory minimum for qualifying development is normally 10%. However, some Surrey adopted documents and council websites historically refer to 20%. These sources should not be copied into a proposal as an automatic county-wide legal requirement. The current National Planning Policy Framework restricts higher requirements to justified, deliverable site allocations in up-to-date development plans. Its policies N1(2) and N2(3) explain this distinction.
Although adopted policy EN9 states 20%, Mole Valley's current BNG page says applications now need the national 10% minimum. The council attributes this change to the August 2026 NPPF. Therefore, use the council's current guidance alongside any relevant site-specific allocation.
Guildford's current biodiversity webpage still states 20% for non-exempt development. However, national policy restricts higher local requirements. Assess whether any current requirement relates to a particular justified site allocation under the revised NPPF. Avoid making a planning or legal conclusion from a webpage alone.
For other Surrey councils, do not infer a 20% rule by association. Also distinguish the percentage result in the statutory metric from habitat protection, net gain conditions, separate urban greening policies, designated sites and management commitments. These are related, but they answer different planning questions.
Published 31 March 2026 / strategic significance
Surrey's Local Nature Recovery Strategy (LNRS) was published on 31 March 2026. It identifies county biodiversity priorities and potential measures and provides a Local Habitat Map. This makes it a useful early-stage tool for planning teams selecting practical nature-recovery opportunities. The map is not a replacement for site surveys or a blanket approval of proposed habitat changes.
Compare the red-line boundary with the official Local Habitat Map and any mapped nature-recovery measures.
Record the existing UKHab type, condition, distinctiveness and potential ecological constraints.
Determine whether the precise proposed habitat and location qualify under the current metric's rules.
Check land, management, legal securing, monitoring and the realistic ability to achieve the target condition.
The mapped Areas of Particular Importance for Biodiversity and Areas that Could become of Importance for Biodiversity have different meanings. In particular, a mapped opportunity does not show that an off-site biodiversity gain has been legally registered or that units can be bought. Use the Surrey LNRS and interactive mapping resources alongside the current statutory biodiversity metric guidance.
Chalk downs / woodland / heathland / river corridors
Surrey includes chalk grassland and woodland on the North Downs, valuable lowland heath, parkland, hedgerows and river corridors. The survey design must follow the actual site. Historic land use, soil, light exposure, hydrology and protected designations can make apparently simple habitat proposals difficult to deliver.
Condition and distinctiveness are not interchangeable. Existing sensitive habitat may have limited scope for replacement. Survey woodland, grassland, mature trees and adjoining land before fixing design assumptions.
Heathland designated sites may require separate impact screening and mitigation. Watercourses and hedgerows are assessed through appropriate statutory metric modules, not simply folded into an area-habitat total.
Before fixing a landscape plan, commission an appropriate habitat survey, baseline condition assessment and protected-species checks where relevant. For watercourse works, consider whether a river condition assessment is needed. Where existing high-value habitats or designated sites are present, avoidance and suitable mitigation should shape the design before gains are calculated.
The Surrey LNRS can guide future connectivity, but local flood risk, drainage, tree protection, historic assets and long-term management requirements remain independent planning considerations. Avoid unsupported claims about site suitability from mapping alone.
Practical project briefing / stage-specific evidence
Use this checklist at the start of the design process. The right documentation depends on the permission route and on whether the project is exempt, a small scheme or more substantial development. A formal Biodiversity Gain Plan is normally dealt with after planning permission and before development commences; it is not the same document as the application-stage baseline information.
| Stage | Action and evidence | When |
|---|---|---|
| 1 — Scope | Confirm the correct LPA, date, red-line area, permission route, exemptions and potential priority habitats. | Before survey scope |
| 2 — Baseline | Prepare habitat/UKHab mapping, condition evidence, metric inputs and any relevant river/hedgerow data. | Early design |
| 3 — Design | Apply the gain hierarchy, minimise impacts, design credible new habitats and test the statutory metric. | Design development |
| 4 — LNRS | Check Surrey mapped measures, habitat suitability and justified strategic significance. | Before final metric |
| 5 — Submit | Supply current validation information; later prepare the Biodiversity Gain Plan, HMMP and legal evidence where required. | Application then pre-commencement |
| 6 — Manage | Agree long-term management, monitoring responsibilities and any required 30-year legal security. | Before delivery |
A useful site brief includes the address, red-line plan, site area, ecological reports, intended proposal, current metric file and a note of any council feedback. ACP can then advise on which BNG assessment and gain plan outputs are actually needed. Do not apply a one-size-fits-all checklist where the national exemption already applies.
Validation / Biodiversity Gain Plan / monitoring
Planning validation checks are not the same as final discharge of the statutory biodiversity gain condition. At application stage, the authority may need the applicant's statement on statutory scope, pre-development habitat information, the metric and other evidence under national rules and its adopted local list. Surrey Heath, for example, specifically refers to a Biodiversity Statement where BNG applies.
After permission, the formal Biodiversity Gain Plan normally requires approval before development begins. This must show how the required gain will be delivered and identify any registered off-site units or statutory credits. Where significant onsite gains or off-site provision are used, a habitat management and monitoring plan and suitable legal securing may be necessary for at least 30 years.
Statutory gain hierarchy / habitat units / costs
A metric shortfall does not itself identify available off-site units. An off-site provider must offer the right habitat type and unit quantity, with its gain site correctly registered and the units allocated to the development. Spatial-risk multipliers, ecological suitability and the statutory metric's trading rules can affect how much provision is needed.
For qualifying non-major developments under the August 2026 arrangements, onsite habitat enhancement and creation and the availability of registered off-site gains can sit at the same preference level in the modified hierarchy. Other cases and earlier permissions may follow different transitional rules. Statutory biodiversity credits remain a last-resort option where the other appropriate solutions cannot be delivered.
Onsite enhancement, onsite creation and off-site registered habitat have different practical, financial and legal requirements. Compare programme, certainty, long-term maintenance and the metric result rather than only unit prices.
Mentions of habitat banks or local initiatives do not prove that units are presently for sale. Ask for current supply, habitat specification, legal allocation terms and all relevant council fees before quoting a project price.
Read ACP's off-site biodiversity units guide and BNG costs and pricing guidance. The correct comparison starts with a validated baseline and the habitat units required after mitigation.
Surveys / metric / design coordination
ACP provides ecology and biodiversity net gain support to planning teams working across Surrey. We can help identify proportional survey requirements, calculate the habitat baseline and development scenario, discuss the appropriate gain route and prepare the technical information needed for the project's planning stage.
A useful first enquiry includes the site address, red-line plan, proposal description, application status and any habitat survey, metric file or local authority correspondence you already hold. We can then advise whether the next priority is survey work, a statutory metric assessment, an HMMP or a complete BNG delivery strategy.
Tell us which council is determining your application and any decision deadlines. We will focus on the evidence that matters to your specific Surrey site, not a generic county package.
Or call 0330 236 7329.
Practical answers / current planning rules
These answers relate to Surrey-wide planning. Apply the correct national rules and verify the relevant council's current adopted policy and validation checklist for the particular application.
No. It applies to qualifying planning permissions, but householder and other statutory exemptions may apply. Since 6 August 2026, developments on red-line sites no larger than 0.2 hectares may also be exempt if they do not impact onsite priority habitat. The application date and site evidence matter.
The statutory national minimum is normally 10% for qualifying schemes. Certain local plan documents refer to 20%, but the August 2026 NPPF limits blanket requirements above the statutory level. Confirm the site's applicable adopted policy or specific justified allocation with the planning authority.
Yes. The Surrey LNRS was published on 31 March 2026. Its strategy and Local Habitat Map can inform habitat location and strategic significance, but they do not replace field habitat surveys, metric rules or legal gain-site registration.
They are scheduled to take over local government functions on 1 April 2027. Until then, the current Surrey district and borough authorities remain relevant for most planning applications. Confirm the determining authority for your application's date and type.
Surrey Heath's BNG guidance refers to a Biodiversity Statement for applicable planning submissions. Check its current local validation list and the particular permission route rather than assuming the same form is mandatory for every Surrey council.
Yes. Statutory BNG exemption does not remove obligations relating to protected species, protected habitats, designated sites, trees or other planning policy. Survey needs follow the actual project and site risks.
For qualifying permissions the formal Biodiversity Gain Plan is normally approved before development starts, after planning permission. Application-stage BNG information and council validation requests are separate requirements.
Possibly, but published references to a habitat bank do not confirm stock, ecological suitability, price or legal allocation. Verify the gain site's registration and current availability before relying on units.
Significant onsite gains and registered off-site habitat delivery generally require legal securing and management for at least 30 years. Not every project or habitat measure has identical contractual obligations; confirm the applicable legal requirements.
Send the site location and red-line plan, the development proposal, relevant planning authority correspondence, surveys or UKHab plans, existing metric calculations and any timetable. Missing documents can be identified during scoping.
Talk to ACP / Site enquiries
Tell us where the site is, what you plan to build and how far the application has progressed. We’ll use that context to discuss the surveys, calculations or plans your project needs.
What to have to handA red-line plan, an existing ecology report or a request from the council can help us scope the work. Start with whatever you already have.
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Surrey BNG
Reviewed 7 November 2026.
