Biodiversity Net Gain (BNG) Surveys and Consultants in South West England
At ACP Consultants Ltd we specialise in providing biodiversity net gain (BNG) surveys and consultants in BNG in South West England for planners, architects, developers and landowners throughout the region.
South West England contains some of the country’s most sensitive and diverse habitats. Development proposals often intersect with protected landscapes, river catchments, coastal habitats and ecological corridors. Developers therefore face increasing pressure to demonstrate measurable biodiversity enhancement from the earliest planning stages.
across Cornwall, Devon, Somerset, Dorset, Wiltshire, Gloucestershire and Bristol. We support developers, architects, planners, landowners and planning consultants throughout the South West. Our team prepares habitat surveys, statutory biodiversity metric calculations, Biodiversity Gain Plans and Habitat Management and Monitoring Plans.
We advise on residential, mixed-use, infrastructure, commercial and rural development projects throughout the region.
Our consultants regularly support projects within Cornwall Council, Dorset Council, Somerset Council, Wiltshire Council, Bristol City Council, Bath and North East Somerset Council, South Gloucestershire Council and Gloucestershire County Council areas.
The South West contains major development pressures linked to housing growth, tourism, energy infrastructure, agricultural change and coastal regeneration. At the same time, authorities increasingly prioritise Local Nature Recovery Strategies, green infrastructure delivery and ecological connectivity. Early BNG input therefore helps reduce planning risk and supports smoother validation and determination.
Our Biodiversity Net Gain (BNG) Services in South West England
- BNG baseline habitat surveys (Metric 4.0 compliant)
- Biodiversity unit calculations & deficit analysis
- Habitat creation, enhancement & on-site mitigation design
- Biodiversity Gain Plans (BGP) for planning submission
- Off-site BNG strategy & unit sourcing advice
- Habitat Management & Monitoring Plans (HMMP)
- Pre-application BNG feasibility & risk reviews
- Planning condition discharge & post-consent support
We follow a simple, transparent process to ensure your project runs smoothly from the very first contact to the final report. Our approach is designed to provide you with clarity at every step, so you’re fully informed and confident in moving forward.
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Step 1: Request a Quote
Fill out our quick quote form or call us, and our team will provide a free, no-obligation quote, outlining the services tailored to your needs.
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Step 2: Confirm Your Booking
Once you approve the quote, simply return the booking form. We’ll schedule your survey and ensure all the details are taken care of.
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Step 3: Receive Your Report
After your survey is completed and payment is received, we’ll promptly issue your survey report, ensuring you get the results as quickly as possible.
In the past year, we’ve delivered over 750+ audit-ready reports supporting 400+ projects for developers, planners, and architects nationwide. We put quality over quantity and build lasting relationships based on trust, ensuring your planning applications are backed by robust evidence and delivered on time.
What is Biodiversity Net Gain in South West England?
Biodiversity Net Gain is a mandatory planning requirement in England. Most qualifying developments must deliver at least a 10% measurable biodiversity increase following development. The requirement forms part of the Environment Act 2021 and applies through Schedule 7A of the Town and Country Planning Act 1990.
In South West England, BNG requirements often involve sensitive habitat and landscape considerations. Development proposals may affect coastal marsh, species-rich grassland, ancient woodland, hedgerow corridors, heathland, floodplain habitat or river systems. Local authorities therefore expect robust ecological evidence and well-designed mitigation strategies.
The BNG process normally begins with a baseline habitat survey. Ecologists classify habitats using the UK Habitat Classification system and assess habitat condition, strategic significance and connectivity. The statutory biodiversity metric then calculates existing biodiversity units and predicted post-development units.
Developers must first avoid habitat loss wherever possible. Schemes should then minimise impacts before considering habitat compensation or off-site delivery. Many South West authorities strongly prioritise on-site enhancement before off-site solutions.
The region also contains nationally important designated landscapes and ecological networks. These include Exmoor National Park, Dartmoor National Park, the Mendip Hills National Landscape, the Dorset National Landscape and internationally protected coastal habitats. BNG strategies therefore require careful integration with wider planning and environmental objectives.
Early ecological input usually improves scheme design, reduces redesign costs and helps avoid validation delays.
Environment Act 2021 and Local BNG Policy Across South West England
Mandatory Biodiversity Net Gain now forms part of the planning process across South West England. Major developments became subject to mandatory BNG requirements in February 2024. Most minor developments followed in April 2024.
Local planning authorities across the South West increasingly publish BNG validation requirements, local guidance notes and green infrastructure policies. These documents often expand upon national policy expectations and reflect local habitat priorities.
Cornwall Council places strong emphasis on ecological resilience, coastal habitats and landscape sensitivity. Dorset Council and Bournemouth, Christchurch and Poole Council focus heavily on heathland mitigation, nutrient neutrality and habitat connectivity. Somerset Council references long-term habitat delivery and monitoring obligations through its BNG guidance. Wiltshire Council links biodiversity enhancement with green infrastructure and ecological networks.
Authorities across Gloucestershire and the West of England also increasingly align planning decisions with emerging Local Nature Recovery Strategies. Strategic habitat enhancement areas may therefore influence metric calculations and habitat prioritisation.
Many South West authorities expect:
- Submission of the statutory biodiversity metric at validation stage.
- Habitat plans showing baseline and post-development habitats.
- Long-term management commitments lasting at least 30 years.
- On-site enhancement before off-site unit purchase.
- Alignment with local ecological networks and green infrastructure strategies.
- Early ecological engagement during design development.
The region’s planning context also includes protected landscapes, river catchments, nutrient neutrality pressures and recreational mitigation zones. These constraints can directly influence achievable biodiversity outcomes.
Experienced regional BNG advice therefore helps reduce planning delays and supports defensible submissions.
Using DEFRA’s Statutory Biodiversity Metric
The DEFRA Statutory Biodiversity Metric provides the national framework for calculating biodiversity change. The metric converts habitats into measurable biodiversity units using habitat area, condition, distinctiveness and strategic significance.
The process begins with a baseline habitat survey. Ecologists map habitats across the site and assess habitat quality using recognised condition criteria. The metric then calculates baseline biodiversity units.
The proposed development layout is then assessed. Habitat retention, enhancement and creation measures generate projected post-development biodiversity units. The completed metric must demonstrate at least a 10% net gain.
The South West contains many habitats with elevated distinctiveness or strategic importance. These include:
- Coastal grazing marsh.
- Species-rich grassland.
- Heathland.
- Ancient woodland.
- Traditional orchards.
- Wet woodland.
- Hedgerow networks.
- Saltmarsh habitat.
- River corridors.
Many sites also sit near protected landscapes, Special Areas of Conservation, Ramsar sites or Sites of Special Scientific Interest. Ecological connectivity therefore remains an important planning consideration.
Local Nature Recovery Strategy areas may also affect strategic significance multipliers within the metric. Authorities increasingly scrutinise habitat assumptions, condition assessments and temporal risk calculations.
ACP Consultants prepares metric calculations, habitat plans and supporting technical reports for planning submissions throughout South West England. Our team also advises on habitat enhancement opportunities, off-site delivery options and long-term management obligations.
Book a Biodiversity Net Gain Survey in the South West
Our ecologists deliver Defra Metric 4.0-compliant BNG surveys across the South West, providing robust baseline habitat data, condition assessments and early planning advice to support successful applications.
BNG Reports and Surveys We Offer
ACP Consultants provides comprehensive Biodiversity Net Gain support throughout South West England. We tailor each assessment to local planning policy, habitat context and development constraints. Our consultants regularly support projects within Cornwall Council, Somerset Council, Dorset Council, Wiltshire Council, Bristol City Council, Bath and North East Somerset Council and South Gloucestershire Council authority areas. We also consider Local Nature Recovery Strategies, green infrastructure priorities and biodiversity validation requirements across the region.
The South West contains extensive ecological diversity and planning sensitivity. Many development sites include species-rich grassland, coastal habitat, woodland corridors, river catchments, wetland habitat and important hedgerow networks. Our team, therefore, prepares locally informed BNG strategies designed to support efficient planning progression and long-term habitat enhancement.
Baseline Habitat Surveys
We undertake UK Habitat Classification surveys and habitat condition assessments across development sites throughout South West England. Surveys identify habitat distinctiveness, ecological connectivity and enhancement opportunities across habitats commonly found within the region, including species-rich grassland, coastal habitat, wet woodland, hedgerow corridors and river systems. Our assessments support residential, commercial, mixed-use and infrastructure planning applications.
Biodiversity Metric Calculations
We prepare DEFRA statutory biodiversity metric calculations for planning applications throughout Cornwall, Devon, Somerset, Dorset, Wiltshire, Gloucestershire and Bristol. Our reports include baseline units, post-development units, habitat trading assumptions and strategic significance considerations linked to Local Nature Recovery Strategies and ecological network priorities.
Biodiversity Gain Plans (BGPs)
We prepare Biodiversity Gain Plans and supporting planning documents for submission to local planning authorities across South West England. Our reports align with local biodiversity guidance, green infrastructure objectives and habitat enhancement priorities commonly referenced by South West councils and planning authorities.
Habitat Management and Monitoring Plans (HMMP)
We produce Habitat Management and Monitoring Plans covering management prescriptions, monitoring schedules, remedial actions and long-term ecological objectives. Plans are tailored to local habitat conditions and commonly include grassland management, hedgerow establishment, woodland planting, wetland enhancement and ecological corridor maintenance measures designed for long-term biodiversity delivery.
BNG Planning Support
Our consultants liaise with local planning authorities, architects, design teams and project managers throughout the planning process. We regularly support projects within environmentally sensitive areas affected by protected landscapes, coastal constraints, river catchments and green infrastructure requirements. We also review evolving layouts and update biodiversity metric calculations where required.
Off-Site Biodiversity Net Gain Advice
We advise on off-site biodiversity unit delivery where on-site enhancement cannot achieve policy requirements. This commonly applies where developments face land constraints, nutrient neutrality pressures, protected landscapes or ecological sensitivity. Our advice includes habitat bank reviews, strategic habitat suitability assessments and guidance relating to ecological connectivity and long-term habitat resilience across South West England.
Counties, Councils, Towns and Planning Context Across South West England
ACP Consultants supports projects throughout Cornwall, Devon, Somerset, Dorset, Wiltshire, Gloucestershire and Bristol. We also regularly advise within Bath and North East Somerset, North Somerset, South Gloucestershire, Bournemouth, Christchurch and Poole, Plymouth and Torbay authority areas.
Our work covers major towns and cities including Bristol, Exeter, Plymouth, Truro, Bath, Gloucester, Cheltenham, Salisbury, Swindon, Bournemouth, Poole, Dorchester, Taunton, Yeovil and Weston-super-Mare.
Planning authorities across the South West increasingly require robust ecological evidence at validation stage. Many authorities now publish biodiversity validation requirements, ecological standing advice and green infrastructure guidance.
Several areas also face overlapping environmental pressures. Coastal authorities often manage recreational impacts and habitat fragmentation. Rural authorities focus heavily on hedgerow retention, habitat connectivity and landscape sensitivity. Urban authorities increasingly prioritise green infrastructure and multifunctional habitat design.
Local Nature Recovery Strategies are also becoming increasingly important across the region. These strategies identify habitat opportunity areas, ecological corridors and nature recovery priorities. BNG proposals that align with these priorities may achieve stronger planning support.
The South West also contains extensive protected landscapes and designated ecological sites. Habitat creation proposals therefore require careful consideration of local ecological character and long-term management practicality.
Early ecological assessment helps identify constraints before layouts become fixed. This approach usually reduces redesign costs and improves planning outcomes.
Regional Expertise Across South West England
ACP Consultants provides Biodiversity Net Gain consultancy throughout the South West region. Our team understands the distinct planning and ecological pressures affecting coastal, rural and urban developments across the area.
We regularly support planning applications within Cornwall Council, Devon County Council, Somerset Council, Dorset Council, Wiltshire Council, Bristol City Council and South Gloucestershire Council areas. We also advise on projects within Bath and North East Somerset, North Somerset, Torbay and Bournemouth, Christchurch and Poole.
Our experience includes residential development, renewable energy schemes, commercial projects, infrastructure upgrades and rural land management proposals. We tailor every assessment to local habitat characteristics, planning policy and ecological opportunity.
The region contains extensive habitat diversity. Coastal wetlands, estuarine habitats, heathland systems, ancient woodland, chalk grassland and species-rich pasture all require careful ecological consideration. Development pressures linked to housing growth, tourism and infrastructure expansion continue to increase across the South West.
Our consultants therefore focus on practical, policy-compliant biodiversity strategies that support efficient planning progression. We also advise on habitat enhancement opportunities that align with local green infrastructure objectives and Local Nature Recovery Strategy priorities.
Explore Our Services in the South West Region
ACP’s South West practice includes locally focused BNG consultancy services across the following areas:
- Cornwall – specialist surveys and BNG assessments for projects under Cornwall Council.
- Devon – BNG metric calculations and habitat management plans supporting Devon County Council’s planning requirements.
- Somerset – ecological surveys and biodiversity gain plans in line with Somerset Council’s 2024 BNG Guidance Note.
- Dorset – tailored biodiversity net gain assessments for Dorset Council’s Local Nature Recovery Strategy.
- Wiltshire – BNG consultancy and habitat management planning compliant with Wiltshire Council’s green infrastructure objectives.
- Gloucestershire – site-specific BNG assessments and monitoring for developments within Gloucestershire County Council’s jurisdiction.
- Bristol – urban and mixed-use biodiversity net gain solutions aligned with Bristol City Council’s environmental planning policies.
Each of these county-level services has its own dedicated page providing further details, survey options and planning guidance.
References
- Defra & Natural England – Biodiversity Metric: Calculate the biodiversity net gain of a project or development
- Lichfield District Council – Biodiversity Net Gain (BNG) Guidance for Planning Applications
- East Devon District Council – How is Biodiversity Net Gain Measured?
- Defra (July 2025) – The Statutory Biodiversity Metric: User Guide
- North Hertfordshire District Council – How to Measure Biodiversity Net Gain
- Chartered Institute of Ecology and Environmental Management (CIEEM) – Biodiversity Net Gain Case Studies & Good Practice
- CIEEM – Biodiversity Net Gain Report and Audit Templates
- UK Statutory Instruments – The Biodiversity Gain Requirements (Exemptions) Regulations 2024
- Natural England – Habitat Management and Monitoring Plan (HMMP) Template (JP058)
- Defra – Biodiversity Gain Plan: Template and Guidance
- Defra – Guidance: Understanding Biodiversity Net Gain
- Natural England – Biodiversity Net Gain: Where to Start
- Biodiversity Net Gain: Bristol
- Biodiversity net gain (BNG): Bath & North East Somerset
- Biodiversity Net Gain (BNG): Gloucester City Council
- Biodiversity Net Gain: Exeter: Devon County Council
- Biodiversity Net Gain (BNG): Truro Cornwall Council
- Biodiversity and development: Salisbury Wiltshire Council
- Biodiversity Net Gain: Somerset Council
Useful Resources
- Dorset Council – Biodiversity Net Gain
- South Gloucestershire Council – Biodiversity Net Gain
- Cornwall Council – Biodiversity Net Gain
- Wiltshire Council – Green Infrastructure and Ecological Networks: Gloucestershire Local Nature Recovery Strategy
- Devon Local Nature Recovery Strategy
- West of England Nature Recovery Network
- Natural England – Biodiversity Net Gain: Landscape and Ecological Enhancement Principles
- Natural England – Local Nature Recovery Strategies
- Cotswolds National Landscape – Nature Recovery Plan
- Exmoor National Park Authority – Nature Recovery and Biodiversity
- Dartmoor National Park – Nature Recovery and Habitat Management
- Bristol City Council – Ecology, Wildlife and Biodiversity Guidance
- Bournemouth, Christchurch and Poole Council – Biodiversity and Planning Guidance
- Somerset Council – Green Infrastructure Strategy
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Frequently Asked Questions
Mandatory Biodiversity Net Gain requirements continue to evolve across South West England. Developers, planners and landowners often require early clarification on surveys, metric calculations, habitat management obligations and planning policy expectations.
The answers below address common questions relating to BNG requirements across Cornwall, Devon, Somerset, Dorset, Wiltshire, Gloucestershire and Bristol. The guidance reflects current national legislation alongside regional planning and ecological considerations.
What developments require Biodiversity Net Gain?
Most qualifying developments across South West England now require mandatory Biodiversity Net Gain under the Environment Act 2021. This applies to many residential, commercial, mixed-use and infrastructure developments throughout Cornwall, Devon, Somerset, Dorset, Wiltshire, Gloucestershire and Bristol. Local planning authorities including Cornwall Council, Somerset Council, Dorset Council, Wiltshire Council and Bristol City Council increasingly expect biodiversity metric calculations, habitat plans and long-term ecological management proposals during the planning process. Development pressures linked to housing growth, tourism, renewable energy infrastructure and coastal regeneration continue to increase across the region, making biodiversity planning more important within both urban and rural authority areas.
When should a BNG survey be completed?
BNG surveys should begin early during project design and planning stages. Early ecological assessment helps identify habitat constraints, ecological opportunities and planning risks before layouts become fixed. Across South West England, many development sites contain hedgerow networks, species-rich grassland, woodland edges, river corridors or coastal habitat that may significantly influence biodiversity metric outcomes. Local authorities increasingly scrutinise ecological information at validation stage, particularly within environmentally sensitive areas such as Dartmoor, Exmoor, the Dorset coast and protected landscapes throughout Cornwall and Wiltshire. Early ecological input usually improves scheme flexibility and reduces redesign costs later in the planning process.
Can BNG be delivered off-site?
Yes. Off-site biodiversity delivery can be used where on-site habitat enhancement cannot achieve required biodiversity units. Planning authorities across South West England normally expect developers to demonstrate that on-site opportunities have been fully explored before relying on off-site solutions. Many councils strongly prioritise habitat retention, enhancement and ecological connectivity within the development boundary. Off-site delivery may become necessary where developments face land constraints, protected landscapes, nutrient neutrality pressures or complex ecological sensitivities. Local Nature Recovery Strategies across Devon, Gloucestershire and the West of England increasingly influence where strategic habitat delivery may provide greater ecological benefit.
How long must habitats be managed?
Most Biodiversity Net Gain habitats require management and monitoring for at least 30 years. Long-term habitat delivery is commonly secured through planning conditions, Section 106 agreements or conservation covenants. Across South West England, management plans often include monitoring of species-rich grassland, wetland habitat, woodland planting, hedgerow establishment and river corridor enhancement. Coastal authorities and rural councils frequently expect detailed habitat management prescriptions reflecting local ecological character and landscape sensitivity. Long-term monitoring also helps ensure habitats continue to function as ecological corridors supporting wider green infrastructure and nature recovery objectives throughout the region.
What habitats commonly affect BNG calculations in the South West?
Habitats commonly affecting BNG calculations across South West England include species-rich grassland, hedgerows, heathland, wetland habitat, woodland, coastal habitat and river corridors. The region contains extensive ecological diversity linked to agricultural landscapes, estuaries, coastal marsh, upland habitats and protected landscapes. Habitat condition, connectivity and distinctiveness significantly influence biodiversity metric outcomes. Many sites across Cornwall, Devon and Dorset also sit near designated ecological sites, protected landscapes or strategic habitat corridors. Local planning authorities increasingly expect habitat enhancement proposals to support ecological connectivity, climate resilience and wider landscape-scale biodiversity objectives.
Why do local planning policies matter?
Planning authorities across South West England increasingly publish biodiversity guidance, green infrastructure policies and Local Nature Recovery Strategy priorities. These local policies often influence habitat enhancement expectations, ecological connectivity priorities and planning validation requirements. Councils including Somerset Council, South Gloucestershire Council, Bristol City Council and Wiltshire Council increasingly expect robust biodiversity metric submissions and long-term ecological management proposals at an early stage. Local policy priorities may also vary depending on habitat sensitivity, development pressure, protected landscapes, river catchments and green infrastructure networks. Understanding these local planning signals helps reduce delays and supports more policy-compliant BNG strategies.
How do protected landscapes affect Biodiversity Net Gain in South West England?
South West England contains some of the country’s most environmentally sensitive landscapes. These include Dartmoor National Park, Exmoor National Park, the Cotswolds National Landscape, the Dorset National Landscape and extensive protected coastline throughout Cornwall and Devon. Development proposals within or near these areas often face greater ecological scrutiny during planning. Habitat enhancement strategies may therefore require stronger emphasis on landscape character, ecological connectivity, habitat restoration and long-term management. Local authorities also frequently assess how development proposals interact with wider green infrastructure and protected habitat networks.
Do South West councils require biodiversity metric information at validation stage?
Many South West authorities increasingly expect biodiversity metric calculations, habitat plans and supporting ecological information during validation or early determination stages. Cornwall Council, Somerset Council, Wiltshire Council, Dorset Council, Bristol City Council and South Gloucestershire Council all continue to strengthen biodiversity and green infrastructure requirements within planning submissions. Validation expectations can vary between authorities and project types, particularly where developments affect protected landscapes, river corridors, coastal habitats or strategic ecological networks. Early submission of robust ecological information usually helps reduce planning delays and requests for further information.
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- Last Updated:
- September 2026
Disclaimer: Our content is prepared by ACP Consultants’ in-house specialists and is based on current guidance, standards, and best practice in environmental consultancy. While we make every effort to keep information accurate and up to date, it is provided for general guidance only and should not be relied upon as a substitute for professional advice on specific projects. Planning authorities retain final decision-making powers, and requirements may vary between local authorities and over time. ACP Consultants accepts no liability for any loss arising from reliance on this content without obtaining tailored advice for your project.