When should I begin a BNG assessment in Wigan?

Biodiversity Net Gain assessments in Wigan should start early in the design process. Early baseline work helps avoid late design changes and gives the planning team confidence during validation.

What does a BNG assessment include in Wigan?

A Biodiversity Net Gain assessment in Wigan typically includes a UKHab baseline survey, a completed Metric, habitat mapping and a clear plan for delivering and securing the required biodiversity uplift over the long term.

Are small sites in Wigan exempt from BNG?

Some small sites in Wigan may be exempt from Biodiversity Net Gain, but only in limited cases defined by national policy. Many smaller plots still require BNG assessment because of the local ecological context and potential habitat value.

Biodiversity Net Gain (BNG) in Wigan

Q: Do I need a Biodiversity Net Gain assessment for development in Wigan?

Yes. Most developments in Wigan now require Biodiversity Net Gain evidence to support the planning application, as Wigan Council expects a clear ecological baseline and a measurable uplift in biodiversity.

Q: What triggers the need for a BNG survey in Wigan?

In Wigan, sites close to rivers such as the Douglas, canal corridors, former industrial or mining land, wetlands, public parks and key transport routes often require a full Biodiversity Net Gain assessment to support the planning process.

Q: What happens if my Wigan site cannot deliver the required uplift onsite?

If a site in Wigan cannot deliver the required Biodiversity Net Gain uplift within its boundary, off site biodiversity units within Greater Manchester may be used, with statutory credits considered only when no other suitable options are available.

Developing or submitting a planning application in Wigan and require Biodiversity Net Gain?

BNG is now a mandatory requirement – we specialise in providing compliant reports to achieve planning consent.

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Do you need a Biodiversity Net Gain Assessment in Wigan?

Biodiversity Net Gain is now a standard requirement for most developments, and Wigan Council applies this expectation across a wide range of proposals. Each scheme must demonstrate how biodiversity on the site will increase from the confirmed baseline, supported by clear evidence and a defensible Metric. Planning officers use this information to judge whether the proposal meets national policy and aligns with Wigan’s local priorities. When BNG information is missing or unclear, applications can face validation problems or delays, so providing accurate baseline data and a workable uplift strategy is important for a smooth planning process in Wigan.

Planning officers in Wigan often request BNG information where development may affect key habitat networks, such as:

• River corridors along the Douglas

• Former mining land and brownfield sites with emerging habitat

• Local parks, woodland edges and community greenspace

• Rail lines, canals and transport routes that form linked habitat corridors

Clear and well presented BNG evidence helps avoid validation delays in Wigan.

We support projects across the Wigan borough, working in areas such as Wigan town centre, Leigh, Ashton in Makerfield, Hindley, Standish, Atherton, Ince, Tyldesley and the wider neighbourhoods within the Wigan local authority boundary.

Why planning authorities in Wigan request a BNG?

Wigan Council encourages applicants to consider BNG requirements early in the design process so the planning team can clearly see how the required biodiversity uplift will be achieved. This usually involves confirming an accurate ecological baseline, completing a Metric that shows the change in biodiversity units and setting out a practical approach for delivering and securing the gains. These steps follow national policy under NPPF Section 15 and help ensure BNG submissions are robust when reviewed by planning officers.

Establishing the baseline at the outset reduces the likelihood of later amendments and supports a smoother planning process in Wigan.

Local Case Insight

A BNG assessment for a residential infill scheme in Hindley identified unexpected habitat value along the boundary of an old footpath that adjoined the site. What looked like ordinary verge vegetation included patches of species rich grassland, young native shrubs and a damp area supporting rushes and wet tolerant plants. These features contributed more biodiversity value than the design team anticipated during early concept work. By adjusting the layout to keep the footpath margin intact and adding new planting to strengthen its link with nearby greenspace, the development was able to deliver the required biodiversity uplift within the site. This approach helped the planning application progress smoothly through Wigan Council and avoided the need for off site units or late changes to the design.

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How the BNG process works

We produce planning-ready BNG Assessments aligned toWigan’s policy expectations.

Key BNG Deliverables for Wigan Projects

For developments in Wigan, our BNG assessments provide the key information planning officers expect. Each assessment includes:

• a verified UKHab baseline

• a clear and defensible Metric

• a practical uplift approach that suits the site

• planning ready reporting for validation

• optional long term management and gain plan material

This structure aligns with Wigan Council requirements and provides a straightforward route to demonstrating BNG.

Step 1

Habitat baseline surveys

Year-round, with optimal survey seasons

Step 2

Metric 4.0 calculations

Completed once habitat data is verified.

Step 3

Uplift strategy development

Aligned with design progression and layout refinement.

Step 4

Integration with Other Surveys

Only if needed. PEA, EIA, and Protected Species surveys

Next Steps

Contact us and we’ll confirm exactly what your Wigan site requires and support a planning-ready, proportionate route forward.

0800 494 7479

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FAQ - BNG in Wigan

Do I need a Biodiversity Net Gain assessment for development in Wigan?

Yes. Most planning applications in Wigan now require evidence that a development will deliver a measurable net gain in biodiversity.

You can review local planning guidance here:

Wigan Metropolitan Borough Council – Planning services main page: https://www.wigan.gov.uk/Resident/Planning-and-Building/Planning.aspx
Wigan Metropolitan Borough Council – Planning applications search portal: https://www.wigan.gov.uk/Resident/Planning-and-Building/Planning/Applications/Search-planning-applications.aspx
Warrington Borough Council – Nearby authority’s planning and environment page (useful for cross-borough context): https://www.warrington.gov.uk/info/200570/planning_and_building/42/planning_applications
Lancashire County Council – Minerals, waste and ecology policy page (relevant for wider ecological context around Wigan): https://www.lancashire.gov.uk/planning/environment/minerals-waste-and-environment/

What triggers the need for a BNG survey in Wigan?

BNG is commonly needed on sites near rivers such as the Croal, Tonge and their floodplains, former mill land, parks, wooded cloughs and transport corridors.

When should I start a BNG assessment in Wigan?

You should commission a BNG assessment early in the design process to avoid redesign later and support smooth validation

What does a BNG assessment involve in Wigan?

It typically includes a UKHab baseline habitat survey, the biodiversity metric calculation, habitat mapping and a plan for achieving and securing uplift.

Are small development sites in Wigan exempt from BNG?

Only in very limited circumstances defined by national policy. Many small urban and edge-of-town sites still need BNG evidence.

What if my Wigan site cannot achieve the ten percent uplift on its own?

Off site biodiversity units within Greater Manchester may be used to meet requirements, and statutory credits are available only when no other options are suitable.

Biodiversity Net Gain (BNG) Assessment in Wigan