Biodiversity Net Gain (BNG) in Manchester
Developing or submitting a planning application in Manchester and require Biodiversity Net Gain?
BNG is now a mandatory requirement – we specialise in providing compliant reports to achieve planning consent.Â
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Do you need a Biodiversity Net Gain Assessment in Manchester?
Biodiversity Net Gain is now a mandatory part of the planning system for most developments in Manchester. The principle is straightforward: a project must demonstrate that the site will deliver an overall improvement in biodiversity compared with its starting condition. Planning authorities will not validate many applications without clear and correctly presented BNG evidence, and missing information often leads to further delays later in the process.
Planning officers in Manchester often request BNG information where development may affect key habitat networks. Typical examples include:
• Canal and riverside corridors linked to the Rochdale Canal, Bridgewater Canal and River Irwell
• Former industrial or regeneration sites that now support early stage habitat
• Urban parks, woodland remnants and greenspace used for local wildlife movement
• Valley systems such as the Irk and Medlock, plus transport routes that act as continuous habitat links
Clear and correctly presented BNG evidence is essential, as planning applications may otherwise face validation issues or delays.
We support projects across the city of Manchester, covering all neighbourhoods including the city centre, Hulme, Ancoats, Ardwick, Chorlton, Didsbury, Withington, Rusholme, Moss Side, Gorton and the wider surrounding areas within the Manchester local authority boundary.
Why planning authorities in Manchester request a BNG
Councils in Manchester look for BNG information at an early stage so they can be confident that your scheme will achieve the required ten percent increase in biodiversity before the layout is finalised. To satisfy this, they need a verified baseline, a completed Metric that shows the change in biodiversity units, and a clear approach for how the gain will be delivered and secured. These steps follow the expectations of NPPF Section 15 and ensure your BNG position is robust during planning.
Having the baseline confirmed early removes the risk of later reclassification and helps protect your programme from avoidable delays.
Local Case Insight
How the BNG process works
We produce planning-ready BNG Assessments aligned to Greater Manchester’s policy expectations.
Key BNG Deliverables for Manchester Projects
For developments in Manchester, our BNG assessments provide the core information planning officers expect. Each assessment includes:
• a verified UKHab baseline
• a clearly justified Metric
• a practical uplift strategy suited to the site
• planning ready reporting for validation
• optional long term management and gain plan material
This structure supports Manchester City Council’s requirements and offers a proportionate route to demonstrating BNG across a wide range of development types.
Step 1
Habitat baseline surveys
Year-round, with optimal survey seasons
Step 2
Metric 4.0 calculations
 Completed once habitat data is verified.Â
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 surveysÂ
Next Steps
Contact us, and we’ll confirm exactly what your Manchester site requires. We provide a planning-ready, proportionate route forward.Â
FAQ - BNG in Greater Manchester
Is a Biodiversity Net Gain assessment required for developments in Manchester city centre?
Yes. Where a development falls within the statutory scope of Biodiversity Net Gain legislation, a BNG assessment must demonstrate at least 10 percent measurable uplift, regardless of whether the site is located in the city centre or outer neighbourhoods.
How are tall building schemes assessed under Biodiversity Net Gain?
For high rise developments, baseline habitats are calculated using the Biodiversity Metric. The post development scenario may rely on green roofs, podium planting and public realm enhancements. The assessment must confirm these measures achieve the required uplift in measurable habitat units.
Do cleared or demolition sites still require a BNG assessment?
Yes. Even where buildings have been demolished, the site may support temporary grassland, scrub or ruderal habitats. A survey is required to establish the true baseline before modelling the redevelopment scenario.
How is biodiversity net gain calculated on very small urban plots?
The Biodiversity Metric calculates habitat units based on area, habitat type and condition. On small plots, available land for enhancement may be limited, making early feasibility modelling critical to avoid shortfalls.
How do river corridors such as the River Irwell affect BNG assessments?
Sites near the River Irwell or associated tributaries may contain riparian habitats or form part of ecological corridors. The assessment must accurately classify these features and consider connectivity within the post development layout.
Can basement car parks and podium decks limit biodiversity delivery?
Yes. Extensive basements or podium structures can restrict soil depth and habitat creation potential. The BNG assessment must reflect realistic deliverability rather than theoretical landscape capacity.
What are common causes of biodiversity unit shortfalls in Manchester?
Shortfalls often arise where baseline habitat value is underestimated or where roof and podium habitats are over specified without meeting Biodiversity Metric criteria. Early modelling reduces this risk.
Is off site biodiversity often required for Manchester schemes?
In dense urban contexts, on site uplift may be constrained. If the assessment identifies a deficit in habitat units, registered off site biodiversity units may be secured to meet the statutory requirement.
Which authority reviews BNG assessments in Manchester?
Manchester City Council acts as the Local Planning Authority and reviews Biodiversity Net Gain assessments submitted alongside planning applications.
Planning guidance can be accessed at:
https://www.manchester.gov.uk/planning
How can ProHort support Biodiversity Net Gain assessments in Manchester?
ProHort provides detailed habitat surveys and robust Biodiversity Metric modelling tailored to high density city centre schemes. We work with design teams to test feasibility early, optimise urban biodiversity measures and minimise biodiversity unit deficits.
