Grimsby BNG advice
Biodiversity Net Gain in Grimsby
Plan your Grimsby 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 Grimsby site.
Local planning guidance
Who decides development applications in Grimsby?
North East Lincolnshire Council determines ordinary applications in Grimsby, Cleethorpes and Immingham. Check its adopted Local Plan, validation guidance and the actual site boundary. The Greater Lincolnshire LNRS covers this area, while Humber Estuary effects need their own assessment where relevant.
Local planning guidance
Adopted and emerging planning policy
Start with the adopted policies and the actual site boundary. Then establish the evidence needed for the proposal and its planning stage.
Which adopted biodiversity policies apply in Grimsby?
North East Lincolnshire's Local Plan 2013–2032 was formally adopted on 22 March 2018 and remains the borough's adopted development plan. Its Policy 41 Biodiversity and Geodiversity protects, manages and enhances internationally, nationally and locally important habitats, while Policy 42 Landscape guides setting and local landscape features. Policy 9 South Humber Bank Mitigation may matter for certain development and affected protected coastal/estuarine habitats. These adopted policies are different from Central Lincolnshire's S60/S61 and cannot be exchanged.
| Adopted policy or document | What it covers | Practical implication for the application |
|---|---|---|
| Policy 41 — Biodiversity and Geodiversity | North East Lincolnshire Local Plan adopted 22 March 2018 | Protect designated sites, local wildlife sites and priority habitat, minimise loss and provide defensible ecological mitigation/enhancement. |
| Policy 9 — South Humber Bank Mitigation | Adopted 2018 NELC plan | Screen relevant estuary-linked employment and infrastructure projects for designated bird habitat and strategic mitigation requirements independent of BNG. |
| Policy 42 — Landscape | Adopted 2018 NELC plan | Consider landscape setting, coastal/estuarine edge, retained vegetation and site design under correct borough policies. |
The requirements above are separate from the later national statutory BNG condition. A project should not achieve numerical gains by damaging priority habitats, designated land or protected species. Existing trees, water bodies, wetlands, wildlife corridors and high-value grassland must be assessed under their own applicable protections.
Which proposed plans should applicants monitor?
NELC published a new Pre-Submission Draft Local Plan in Regulation 19 consultation from 30 September to 12 November 2026. At Full Council on 24 September a majority had voted not to proceed, but on 25 September the Government issued a statutory intervention direction requiring the Council to continue consultation and submit the plan by year-end. This is still an emerging plan, not adopted. Applicants should use the 2018 adopted Policy 41 and currently applicable national BNG laws, treating the draft and any future inspector's recommendations appropriately.
A consultation or Gateway stage is not an adopted Local Plan. Therefore, the plan currently in force, any relevant made neighbourhood plan and the 2026 National Planning Policy Framework continue to guide decisions.
Local planning guidance
How does the Local Nature Recovery Strategy apply to Grimsby?
Grimsby is covered by the Greater Lincolnshire LNRS, formally published 31 July 2026, which also covers Lincolnshire County Council, North Lincolnshire and North East Lincolnshire. This statutory nature-recovery area crosses ACP's East Midlands and Yorkshire/Humber regional grouping: it does not change Grimsby's planning authority or regional navigation. Mapped measures for estuaries, saltmarsh, lowland grassland and urban/coastal connectivity require a matching actual habitat intervention before any metric significance score.
The Greater Lincolnshire Local Nature Recovery Strategy was published 31 July 2026, with Lincolnshire County Council as responsible authority. Its Local Habitat Map identifies existing important habitats and locations where specified measures can support nature recovery.
An ecologist must test whether a proposed enhancement genuinely matches the relevant mapped measure. An LNRS opportunity polygon cannot replace a field survey, create units automatically or make a habitat gain site legally registered. Download the current map and retain its source/date when justifying strategic significance.
Local planning guidance
Local habitats and site considerations
Use habitats within and connected to your site to scope surveys and retain important ecological connections.
What makes biodiversity assessment locally specific?
Grimsby docks, the River Freshney, Alexandra Dock and the Humber-side industrial waterfront create an unusual mix of hardstanding, tidal/coastal ecology and urban watercourse constraints. Open mosaic brownfield, scrub, mature trees, intertidal mudflat and wader feeding landscapes may occur in the wider area, but not every industrial plot supports each type. Habitat surveys should address any watercourse module and adjacent designated-site impacts where a real development has an effect.
The Humber Estuary is internationally protected as SPA, SAC and Ramsar, and relevant development may need a Habitats Regulations Assessment for birds, intertidal habitats, coastal water quality, hydrology, noise or recreation. A developer cannot assume that 10% more biodiversity units resolves likely adverse effects. Policy 9's South Humber Bank mitigation and bird-supporting functional land may be important for actual port or nearby industrial schemes, not every town-centre proposal.
Protected-species licensing, statutory site impact assessment, woodland or tree protection and any relevant watercourse assessment remain separate from BNG. A development exempt from the statutory condition may still need to avoid or mitigate ecological harm.
How should Grimsby development opportunities be approached?
NELC's adopted Grimsby Town Centre Masterplan and regeneration planning identify Alexandra Dock housing and improved waterfront public realm. The Alexandra Wharf redevelopment on former industrial land involves 120 homes and new green space. The council reports the scheme received planning approval in 2025 and that by early November 2026 construction had begun, with the first phase nearing completion. That does not demonstrate a statutory biodiversity-gain calculation or prove ecological unit delivery.
Three separate Grimsby questions: Policy 41, Humber HRA and statutory BNG
A former industrial Grimsby site may be subject to NELC adopted Policy 41 Biodiversity and Geodiversity, national statutory 10% BNG, and a separate Habitats Regulations Assessment if it could affect the Humber Estuary SPA/SAC/Ramsar. Policy 9 South Humber Bank Mitigation may add relevant requirements for some port and employment development. None of these can be replaced by another county’s Central Lincolnshire Policy S61. The actual red-line parcel, estuarine water quality, birds and mapped habitats determine what evidence and avoidance is proportionate.
For a constrained scheme, first map existing vegetation, watercourses and habitats, then compare the proposed layout with avoidance and retention options. Habitat creation must suit soils, drainage, shading, public access and achievable long-term management. Do not infer biodiversity condition from the former industrial or agricultural land use.
Local planning guidance
What can applicants learn from local evidence?
North East Lincolnshire Council published a 4 November 2026 account of Alexandra Wharf, a £20 million Keepmoat-led Grimsby docks housing scheme with 120 planned homes near Alexandra Dock. Council reports say the development had planning approval in 2025 and work was under way, with new green space planned. Its main ecology lesson is to assess industrial land and waterside networks before assuming a zero baseline.
Local planning guidance
What BNG evidence does North East Lincolnshire Council expect?
For development subject to statutory BNG, the national application-stage information normally includes:
- Whether the applicant considers the biodiversity gain condition applicable, with reason if exempt.
- The pre-development biodiversity value, completed appropriate published statutory metric, and version/publication date.
- Any earlier baseline date and reasons where relevant.
- Details of habitat degradation and earlier calculations where applicable.
- Any irreplaceable habitat on the red-line site.
- A scaled map showing current onsite habitats and a north point.
North East Lincolnshire Council's planning application validation is governed by the borough's own local requirements and current national BNG evidence. The 2026 proposed Local Plan Regulation19 documents and their Habitats Regulations Assessment are not an adopted application checklist. For estuary-linked schemes, protected bird and habitat information may be necessary, while ordinary exempt proposals should not be forced to provide the final statutory gain plan at the initial application stage.
Additional ecology or landscape reports may be necessary and proportionate for specific impacts. Confirm the current council validation checklist and application type rather than assuming one universal report package. The final Biodiversity Gain Plan is normally approved after planning permission, before commencement, rather than being required universally with the first application.
For help commissioning evidence, see our BNG assessment service and habitat surveys.
Local planning guidance
What are the current statutory rules?
Qualifying development in England normally needs 10% statutory BNG. From 6 August 2026, a new application on a whole development site of 0.2 hectares or less can be exempt where no onsite priority habitat is adversely affected. Certain wholly temporary schemes lasting five years or less may also qualify; the former dedicated self/custom-build exemption no longer applies to new applications. Older cases and section 73 permissions require their own transitional assessment.
The 29 September 2026 NPPF, policies N1(2) and N2(3), restricts mandatory local BNG requirements above the statutory level to specific, justified and deliverable allocations. A general aspiration to improve biodiversity should not be misrepresented as an adopted blanket 20% requirement.
The latest government statutory metric, as at 10 November 2026, is v1.1.1, updated 10 November 2026. GOV.UK permits any published statutory metric version where appropriate; pre-statutory Metric 4.0 is not an accepted mandatory tool. An eligible smaller scheme may instead use the separate Small Sites Metric.
For decision criteria, see our BNG exemptions guide and statutory biodiversity metric service.
Local planning guidance
What if suitable biodiversity gains cannot be delivered onsite?
The South Humber Bank mitigation strategy and Greater Lincolnshire LNRS identify protected habitat duties and possible recovery priorities but do not themselves create or allocate saleable statutory BNG units. For any registered offsite gain site, check government registration, actual habitat class and legal unit allocation.
For major development, appropriate onsite creation/enhancement normally has priority under the national gain hierarchy. For qualifying non-major applications made from 6 August 2026, onsite and registered offsite gains may be considered at an equivalent hierarchy level. Statutory biodiversity credits remain the last resort.
Any proposed offsite units must meet habitat-trading, spatial-risk, legal agreement, government gain-site registration and allocation rules. A local supplier's brochure, LNRS opportunity map or projected bank cannot demonstrate current saleable units. Significant onsite and registered offsite gains generally require at least 30 years of secure habitat management.
Our offsite biodiversity units guide and Habitat Management and Monitoring Plan service explain the respective stages.
Your site checklist
Seven checks before commissioning a BNG calculation
Use these seven checks to prepare a proportionate brief for your site assessment and planning submission.
| Check | Site evidence | Why it matters |
|---|---|---|
| Planning authority | Confirm the red-line boundary and the actual decision-maker: North East Lincolnshire Council; check any separately identified planning geography. | Select the correct adopted plan, map and application validation list. |
| BNG applicability | Record the application date, whole site hectares, onsite priority habitats, development type and any earlier or section 73 permission. | Test the legally correct exemption, transition and delivery hierarchy. |
| Surveyed habitat | Obtain UKHab parcels, habitat conditions, hedgerows, watercourses, trees, photographs and protected-species evidence. | Determine survey scope, habitat condition and appropriate statutory metric modules. |
| Published LNRS | Check the Greater Lincolnshire Local Nature Recovery Strategy current Local Habitat Map and the exact matching habitat measure, not just an opportunity colour. | Justify the proposed measure against the published LNRS map and site location. |
| Protected sites | NELC Policy41, South Humber Policy9, River Freshney/Alexandra Dock water quality, Humber Estuary SPA/SAC/Ramsar and any linked coastal waterbird habitat; site-specific HRA and UKHab evidence. | Identify HRA, protected species, watercourse or other separate safeguards. |
| Gain-delivery route | Test viable onsite habitat, current habitat trading, genuine government-registered off-site allocation and significant enhancement management. | Check actual habitat trading, registered allocations, spatial risk and feasible habitat creation. |
| Application and stewardship | Use the appropriate council's application documents and prepare final gain-plan and long-term management at the right stage. | Align initial evidence, postpermission gain-plan approval and long-term stewardship. |
Local planning guidance
Project planning and delivery
Build the planning evidence around a consistent habitat baseline, site layout and metric. The steps below connect the application documents with practical habitat delivery.
What should a Grimsby project budget for?
Keep the cost of UKHab/condition survey, statutory metric, design and habitat management separate from possible Humber Estuary HRA, coastal bird or hydrology studies. Council application, port/infrastructure legal and monitoring costs are scheme-specific. The £20m Alexandra Wharf regeneration investment is not a price for BNG units, and no universal NELC biodiversity unit tariff was identified.
Keep the costs of UKHab and condition surveys, the statutory metric, targeted protected-species work, registered offsite biodiversity units, legal obligations, and long-term habitat monitoring separate. These are not interchangeable fees. No generic market price can replace an actual quotation, and a council fee documented for a protected-site scheme is not the price of statutory BNG units.
A final Biodiversity Gain Plan for qualifying permission normally comes after consent and before commencement. Significant gains need realistic legal stewardship and a suitable habitat management/monitoring plan, often for at least 30 years.
Read our Biodiversity Gain Plan guide and BNG cost categories.
Practical assessment steps for Grimsby
First — establish the planning context. Supply the development boundary, proposals, expected application date and known planning authority. Identify current adopted policy, national BNG applicability, LNRS territory and any important constraints.
Next — survey and calculate. Scope UKHab, habitat condition, area/hedgerow/watercourse modules and, where justified, protected-species or Habitats Regulations work. Record metric version and survey assumptions transparently.
Then — plan realistic delivery. Seek habitat retention and appropriate onsite design. Assess any registered offsite shortfall and long-term management needs, without promising units or planning permission before a defensible assessment.
CTA: Request a Grimsby BNG project quotation — the approved original native three-step enquiry form, unchanged.
Local planning guidance
Frequently asked questions
These answers cover common planning, habitat and delivery questions for projects in Grimsby.
Is Grimsby in East Midlands or Yorkshire and the Humber for ACP BNG pages?
Grimsby lies in North East Lincolnshire Council and is grouped under Yorkshire and the Humber for regional navigation. Its wider Greater Lincolnshire Local Nature Recovery Strategy is shared across administrative areas, but that does not move its planning authority into Central Lincolnshire.
Does Central Lincolnshire Local Plan policy S61 apply in Grimsby?
No. Grimsby is governed by North East Lincolnshire's adopted 2018 Local Plan, including Policy 41 Biodiversity and Geodiversity. Central Lincolnshire S61 applies to Lincoln City, North Kesteven and West Lindsey, not Grimsby.
Is the 2026 North East Lincolnshire Local Plan already adopted?
No. A Regulation 19 consultation is open 30 September to 12 November 2026 following a ministerial direction. The adopted 2018 plan remains operative pending examination and formal adoption of any replacement.
Does 10% BNG automatically resolve Humber Estuary effects?
No. The Humber Estuary SPA, SAC and Ramsar site has separate protected-site legal requirements. A development with relevant water quality, bird disturbance or habitat pathways may require Habitats Regulations Assessment regardless of the biodiversity-unit score.
Was Alexandra Wharf approved and does it have completed BNG units?
Council reporting says the 120-home Alexandra Wharf scheme received planning permission in 2025 and was under construction by November 2026.
Which Local Nature Recovery Strategy covers Grimsby?
The Greater Lincolnshire LNRS was adopted and published in July 2026 under Lincolnshire County Council's responsible-authority role and includes North East Lincolnshire. The map can inform recovery actions but cannot substitute for actual site surveys or register BNG units.
Does North East Lincolnshire Policy 9 replace statutory BNG on South Humber sites?
No. Policy 9 South Humber Bank Mitigation concerns relevant protected-estuary effects and strategic mitigation. It does not replace the statutory 10% BNG calculation, nor does a metric increase automatically satisfy Habitats Regulations Assessment.
Has Alexandra Wharf's housing scheme delivered verified statutory BNG units?
The council reports that the 120-home Alexandra Wharf regeneration obtained planning approval in 2025 and was under development in November 2026. Those records do not establish an approved biodiversity-gain unit allocation or a completed 30-year habitat-management outcome.
Does every Grimsby development need 10% Biodiversity Net Gain?
No. Qualifying development normally needs 10%, but the legal exemptions and transitions are important. New applications from 6 August 2026 can qualify for the conditional exemption on a site of 0.2 hectares or less where no onsite priority habitat is adversely affected. Protected species and habitats can require separate evidence.
Can a small site in Grimsby use the Small Sites Metric?
Only if the development and habitats meet the government's Small Sites Metric eligibility rules. Site area or number of dwellings alone does not decide this. The main statutory metric may be required instead, particularly where sensitive habitats or other exclusions apply.
When is the final Biodiversity Gain Plan approved in Grimsby?
For eligible permissions the final Biodiversity Gain Plan is normally submitted and approved after planning permission and before development starts. The original application needs the national baseline information plus any necessary and proportionate evidence required under the correct authority's current validation list.
Can I purchase off-site biodiversity units for a Grimsby project?
Potentially, provided the units meet the relevant habitat-trading, registration, legal allocation and spatial-risk rules. Availability, unit classes and prices have to be checked for the actual scheme. A supplier's website or nature-recovery map is not proof of available allocated units.
Project support
How ACP can help with your Grimsby project
ACP can help you plan the surveys, calculations and documents your site needs. We agree the scope around your proposal, its planning stage and the habitats affected.
Survey, design and planning support
- Habitat surveys and condition assessments.
- Statutory metric calculations and design options.
- BNG reports and planning submission support.
- Gain plans and habitat management documents.
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.
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Grimsby BNG
Sources and references
Reviewed 10 November 2026.
Official planning and nature recovery sources
- Greater Lincolnshire LNRS published strategy
- North East Lincolnshire adopted Local Plan
- 2026 Local Plan Review
- Stage 4 Pre-submission Local Plan Draft
- 2024–26 Biodiversity Duty Council Report
- Grimsby Alexandra Wharf redevelopment update
- NELC housing schemes
- North East Lincolnshire local plan Policy41 local impact report
- Current national BNG guidance
- Updated statutory metric tools
- National Planning Policy Framework: biodiversity policies N1 and N2