Elmbridge BNG advice
Biodiversity Net Gain in Elmbridge
Plan your Elmbridge development around local habitats, planning requirements and practical biodiversity gains.
ACP Consultants can help with habitat surveys, biodiversity metric calculations and a practical BNG delivery plan for your Elmbridge site.
Local requirements
Elmbridge BNG requirements at a glance
| Check | Practical answer |
|---|---|
| Planning authority | Elmbridge Borough Council — verify the actual parcel, any special planning jurisdiction and site type |
| Adopted development plan | Elmbridge Core Strategy adopted July 2011 and Development Management Plan adopted 2015 |
| Specific biodiversity policies | CS15 – Biodiversity; DM21 – Nature Conservation and Biodiversity; CS13 – Thames Basin Heaths SPA |
| Emerging plan status | Elmbridge is preparing a new Local Plan under the reformed planning system introduced in March 2026. A 20% proposal appeared during an earlier draft's modification stage, but no blanket 20% policy has been verified as part of the adopted Core Strategy/DMP. Do not claim a draft is adopted. |
| LNRS | Surrey Local Nature Recovery Strategy, Published 31 March 2026; Surrey County Council |
| Statutory BNG | Normally at least 10% for eligible applications; exemption and application date checks are essential |
| Protected sites | Independent Habitats Regulations or protected-species evidence where a credible impact pathway exists |
Planning authority and policy
Local planning requirements for Elmbridge
Confirm the planning authority
Elmbridge Borough Council covers places including Cobham, Esher, Walton-on-Thames and Weybridge. Surrey County Council handles county matters such as minerals and waste. Confirm the authority using the site boundary.
See BNG in Surrey and the South East regional guide.
Use the adopted development plan
The adopted framework includes the 2011 Core Strategy and 2015 Development Management Plan. CS15 and DM21 address biodiversity and nature conservation. CS13 deals with Thames Basin Heaths SPA requirements.
The previous submitted Local Plan was withdrawn in February 2025. A new plan process began in October 2026. A 20% proposal in earlier draft material is not an adopted borough-wide requirement.
Establish the gain target
Eligible development normally needs at least 10% statutory gain. Establish the applicable target using current national policy, any relevant site-allocation policy and existing permission.
Plan habitat retention, suitable enhancement and long-term management alongside the site layout. Check the national biodiversity planning policies when establishing obligations.
Check dates and exemptions
For applications from 6 August 2026, sites up to 0.2 hectares may qualify for an exemption if no onsite priority habitat is adversely affected.
Householder, de minimis, temporary-development and transitional rules have their own conditions. Record the application date, site area and supporting habitat evidence.
Use the BNG exemptions guide to identify the relevant route.
Nature recovery and local geography
Local habitats and nature recovery in Elmbridge
Use the local nature recovery map
The published Surrey Local Nature Recovery Strategy provides priorities and mapped opportunities for habitat recovery. It was published in March 2026.
For Elmbridge, consider Thames and Mole river corridors, Chatley Heath, Cobham and Esher woodland, and Walton or Weybridge urban plots. Match the actual site location and proposed habitat to a relevant recovery measure.
Local habitats to consider in Elmbridge
Use the landscape context to scope the survey, then record the habitats actually present within the site boundary.
| Local setting | Potential habitat or evidence issue |
|---|---|
| River Thames and River Mole corridors | Floodplain, riparian trees, bankside vegetation and habitats connected to watercourses, where affected. |
| Chatley Heath and Ockham/Wisley Commons | Heathland and associated protected birds; avoidance strategies can apply to some residential schemes. |
| Cobham and Esher woodland | Ancient woodland, veteran trees and connected wooded boundaries, where present on the site. |
| Walton/Weybridge urban plots | Gardens, street trees and planted boundaries can have significant baseline value despite urban location. |
Plan protected-site and species evidence
Residential proposals within the relevant Thames Basin Heaths SPA zone can need SANG and SAMM measures. Use the council’s CS13 guidance, mapped zone and current contribution schedule.
Check heathland effects around Chatley Heath and Ockham/Wisley Commons, and woodland or veteran-tree constraints where present. Riverbank proposals along the Thames or Mole may require additional watercourse evidence.
Planning and delivery
Preparing evidence and delivering biodiversity gain
Prepare the habitat baseline and metric
Start with the site’s habitat baseline and condition. Use the appropriate statutory metric; the Small Sites Metric is suitable only where its eligibility conditions are met.
In Elmbridge, survey Thames and Mole river corridors, Chatley Heath, Cobham and Esher woodland, and Walton or Weybridge urban plots where these occur within or affect the proposal. Record the actual habitat condition and relevant watercourse evidence.
See BNG assessments and habitat surveys, habitat condition assessment and Small Sites Metric assessments.
Prepare the planning submission
Confirm the planning authority, application date, relevant policies and whether statutory BNG applies. Then agree a proportionate submission scope with the council.
- An applicability or exemption explanation supported by site evidence.
- The red-line boundary, baseline habitat plan and metric where required.
- Proposed layout, retained habitats and feasible habitat gains.
- Any protected-species, watercourse, drainage or Habitats Regulations evidence.
Test the layout against local habitat constraints
Retain sensitive habitats and useful connections where possible. Use these questions to compare realistic layout and habitat options.
| Local setting to test | Useful design and survey question |
|---|---|
| River Thames and River Mole corridors | Can the proposal avoid impacts? Floodplain, riparian trees, bankside vegetation and habitats connected to watercourses, where affected. |
| Chatley Heath and Ockham/Wisley Commons | What would retaining or improving connectivity involve? Heathland and associated protected birds; avoidance strategies can apply to some residential schemes. |
| Cobham and Esher woodland | Do the existing habitats or species interests restrict the proposed gain type? Ancient woodland, veteran trees and connected wooded boundaries, where present on the site. |
| Walton/Weybridge urban plots | Can the layout integrate useful green infrastructure? Gardens, street trees and planted boundaries can have significant baseline value despite urban location. |
Choose habitats suited to the site and its long-term management. Match nature recovery measures to the published LNRS map, then calculate all relevant unit categories.
Development and regeneration context
For intensification or redevelopment in Elmbridge, apply CS15 and DM21 alongside statutory BNG and any relevant allocation. Preserve useful river, woodland and garden connections early in the layout. Track the new Local Plan separately from the adopted policy framework.
A practical Elmbridge planning example
Illustration: a redevelopment site contains mature trees and a riverbank. Retain valuable trees and allow sufficient space for their long-term condition. Assess the river habitat and proposed works. If the scheme creates new homes, check the applicable Thames Basin Heaths SPA route as well.
Plan off-site delivery and long-term management
Calculate the genuine shortfall before committing to off-site units. Apply the relevant gain hierarchy, habitat trading rules and location requirements to the proposed delivery route.
Use the Surrey Local Nature Recovery Strategy to explore habitat opportunities. Confirm registration, suitable units and current availability directly with the proposed supplier.
Read about off-site biodiversity units, Biodiversity Gain Plans and Habitat Management and Monitoring Plans.
Council and delivery costs
What should your Elmbridge BNG budget cover?
Budget for habitat surveys, metric calculations, planning reports and any gain-plan or management work. The scope depends on the site, habitat types and planning stage.
Elmbridge publishes separate Thames Basin Heaths contributions, including SAMM charges. Use the current schedule for the dwelling mix and relevant zone; keep these costs separate from any BNG unit purchase.
Planning evidence
Elmbridge BNG preparation checklist
Free resource: Use the local BNG planning evidence route worksheet. It provides a light, accessible reference to official documents and the difference between BNG and separate ecological duties.
Planning evidence worksheet
Find your Elmbridge planning and evidence route
Use these questions to identify the planning documents, habitat evidence and delivery information relevant to your site.
Open the question relevant to your project
Which planning authority and adopted plan?
Adopted framework: Elmbridge Core Strategy adopted July 2011 and Development Management Plan adopted 2015. Policies: CS15 – Biodiversity; DM21 – Nature Conservation and Biodiversity; CS13 – Thames Basin Heaths SPA.
Check the red-line boundary, current local list and official policies map. The county parent is Biodiversity Net Gain in Surrey.
Is a new Local Plan or higher BNG target already operative?
Elmbridge is preparing a new Local Plan under the reformed planning system introduced in March 2026. A 20% proposal appeared during an earlier draft's modification stage, but no blanket 20% policy has been verified as part of the adopted Core Strategy/DMP. Do not claim a draft is adopted.
The current national 10% requirement applies to eligible development, subject to exemptions. An emerging percentage must not be presented as an adopted obligation.
Which published LNRS and map apply?
Surrey Local Nature Recovery Strategy — Published 31 March 2026. Responsible authority: Surrey County Council.
Match the site to an actual mapped measure and suitable habitat. Record the mapped recovery measure and survey evidence supporting the metric entry.
Could my application qualify for a 2026 BNG exemption?
For applications from 6 August 2026, a red-line site up to 0.2 hectares may qualify if no onsite priority habitat is adversely affected. Other householder, de minimis, temporary and transitional categories have distinct conditions.
What separate habitat or designated-site issue matters here?
Elmbridge's council specifically identifies Chatley Heath and part of Ockham and Wisley Commons SSSI within the Thames Basin Heaths SPA. The council's CS13 guidance references residential recreational mitigation for affected parts of Cobham, Weybridge and Hersham. Check its official influence-zone map, exact development type and any SANG/SAMM contribution.
Coordinate any Habitats Regulations, protected-species and water-quality evidence with the BNG work.
When do I need a gain plan and habitat management?
Planning-stage documents depend on the current council validation list and proposal type. The final statutory gain plan is normally approved after permission and before commencement. Significant habitat gains may need at least 30 years of secured management and monitoring.
Details to gather before an enquiry
Sources reviewed: 10 November 2026
Project support
How ACP can help with your Elmbridge project
ACP can help scope the habitat surveys, metric calculations and planning reports needed for your Elmbridge proposal. Early advice is most useful while the layout can still change.
We can consider Thames and Mole river corridors, Chatley Heath, Cobham and Esher woodland, and Walton or Weybridge urban plots alongside the site’s planning route and proposed works.
Local planning questions
Frequently asked questions about BNG in Elmbridge
For a site-specific question, discuss your project with ACP.
Does Elmbridge's 2011 Core Strategy still apply?
Yes. It remains the adopted strategy alongside the 2015 Development Management Plan. The council is preparing a new Local Plan, but that is not an adopted replacement.
Is Elmbridge's BNG requirement 20%?
An earlier draft proposed a 20% percentage, but it is not a verified adopted blanket rule. Use national statutory BNG requirements and the adopted CS15/DM21 policies.
What is Elmbridge's 2026 SAMM charge?
The council publishes bedroom-based 2026/27 contributions for relevant Thames Basin Heaths SPA housing. For example, £809.92 per one-bedroom dwelling and £1,088.14 per two-bedroom dwelling. These are not BNG units.
Can works next to the Thames require a watercourse metric?
Possibly. Survey the actual bank and watercourse intervention. Habitat, flood, protected species and river condition assessment may also require separate evidence.
Which habitat surveys might a site in Elmbridge need?
Scope the assessment around the habitats and proposed effects. In Elmbridge, relevant settings include Thames and Mole river corridors, Chatley Heath, Cobham and Esher woodland, and Walton or Weybridge urban plots. The red-line plan, habitat condition and any water or species pathways determine the survey work.
How should I use the local nature recovery map?
Use the published map to match the site and proposed habitat to a recovery measure. Survey evidence and feasible management then support the design and metric calculation. Confirm the planning authority separately, including any National Park jurisdiction.
How do BNG exemptions work for a small Elmbridge development?
Since 6 August 2026, a red-line site of 0.2 hectares or less may qualify for exemption if the statutory conditions are satisfied, including no adverse effect on onsite priority habitat. Other ecological duties may remain.
How can habitat retention help with BNG in Elmbridge?
Retain valuable habitats and connections where feasible, and test how the layout affects them. If a genuine shortfall remains, use the applicable gain hierarchy and habitat trading rules to select a suitable delivery route.
When is the final gain plan needed for Elmbridge Borough Council?
For eligible ordinary applications the final statutory Biodiversity Gain Plan normally needs approval after planning permission and before commencement. Check what the council asks for during validation and whether a management plan is needed.
Talk to ACP / Site enquiries
What does your site need next?
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.
Request a site-specific quotation
Start with the information you have. We ask for your email, site location and enquiry, with a telephone number at the final step.
We use your details to respond to your enquiry. Read our Privacy Policy.
Elmbridge BNG
Sources and references
Reviewed 10 November 2026.
Official planning and nature recovery sources
- Current GOV.UK exemption guidance
- Surrey LNRS
- Appropriate assessment guidance
- Elmbridge adopted Core Strategy
- Elmbridge Development Management Plan
- Elmbridge council biodiversity advice note
- Elmbridge future Local Plan status
- Thames Basin Heaths 2026/27 SAMM tariff
- GOV.UK's BNG guidance
- statutory biodiversity metric downloads
- National Planning Policy Framework: biodiversity policies N1 and N2
- Elmbridge: new Local Plan preparation
- Elmbridge: withdrawal of the previous submitted plan