Do you need a Biodiversity Gain Plan in Hampshire before you can start work?
Where Biodiversity Net Gain applies, a Biodiversity Gain Plan becomes the legal document that allows work to begin. We put that plan together clearly, correctly and in a format councils approve, so your project moves ahead.
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You’ll need a Biodiversity Gain Plan in Hampshire if your planning permission includes a condition linked to Biodiversity Net Gain (BNG). The Biodiversity Gain Plan is the document that shows how the required biodiversity improvement will actually be delivered, how it will be maintained, and who is responsible for it.
Without an approved Biodiversity Gain Plan in place, many developments cannot legally begin, even where planning permission has already been granted.
Planning officers in Hampshire frequently require formal Biodiversity Gain Plan evidence where development affects:
If this evidence isn’t provided in the correct format, many planning applications aren’t validated at all, or they are delayed by conditions later in the process.
We provide Biodiversity Gain Plan services across: Southampton, Portsmouth, Winchester, Basingstoke, Andover, Eastleigh, Fareham, Gosport, Aldershot, Farnborough and all surrounding towns, villages and rural areas across the county.Â
Planning Authorities across Hampshire require a Biodiversity Gain Plan because Biodiversity Net Gain is now a statutory requirement under the Environment Act 2021. The Plan provides the legally enforceable route for delivering biodiversity improvements tied to a specific planning permission. Without an approved Plan, the BNG condition cannot be lawfully discharged, and development cannot commence on site.Â
We produce planning-ready BNG Assessments aligned to Hampshire’s policy expectations.
Your Biodiversity Gain Plan is structured to meet Hampshire‘s planning requirements and typically includes:
Habitat delivery strategy — how and where biodiversity uplift will be achieved
Mapped habitat parcels — legally reliable plans linking habitats to the approved metric
Optional integration with a Habitat Management & Monitoring Plan (HMMP) where 30-year management is required
Submission-ready planning document — formatted for Local Planning Authority approval
This ensures your BNG condition in Hampshire can be discharged cleanly and lawfully.
We assess your existing BNG assessment, site layout and planning condition.
Habitat delivery proposals, mapping and management requirements are drafted.
The plan is aligned with your build programme and any wider ecological or planning documents.
 We respond to any LPA queries or amendments required.
Ready to secure approval and start on site? We’ll confirm what your Hampshire site needs and help you move forward without unnecessary delay.Â
Yes. Where development falls within the statutory scope of Biodiversity Net Gain legislation, a Biodiversity Gain Plan must demonstrate at least 10 percent measurable uplift compared to the approved baseline habitat value.
Yes. Where development is permitted within National Park boundaries, statutory Biodiversity Net Gain requirements still apply. The Biodiversity Gain Plan must demonstrate compliant uplift while respecting sensitive landscapes and habitats.
In parts of Hampshire, nutrient mitigation measures may be required in addition to Biodiversity Net Gain. The Biodiversity Gain Plan must remain technically consistent with any nutrient neutrality strategy and avoid conflicting land use proposals.
Yes. Coastal location does not remove statutory requirements. The Biodiversity Gain Plan must quantify habitat losses and ensure uplift is delivered through realistic and ecologically appropriate habitat proposals.
On strategic greenfield sites, baseline habitats may include improved grassland, hedgerows and woodland edges. The Biodiversity Gain Plan must clearly demonstrate how the 10 percent uplift will be delivered and legally secured.
Approval is handled by the relevant Local Planning Authority, such as Winchester City Council, East Hampshire District Council, New Forest District Council or others depending on location.
Planning guidance for Winchester City Council can be accessed at:
https://www.winchester.gov.uk/planning
Can redevelopment of former military or institutional land trigger Biodiversity Net Gain?
Certain habitats may be classified as irreplaceable. In such cases, avoidance is typically expected. The Biodiversity Gain Plan must demonstrate how impacts are minimised and addressed in accordance with national guidance.
Yes. Where on site uplift is insufficient, developers may secure registered off site biodiversity units. The Biodiversity Gain Plan must confirm legal registration and long term securing arrangements.
ProHort prepares technically robust Biodiversity Gain Plans tailored to Hampshire’s coastal, National Park and nutrient constrained planning context. We ensure accurate metric modelling, realistic habitat proposals and clear securing mechanisms to minimise approval risk.
