Birmingham BNG advice
Biodiversity Net Gain in Birmingham
Plan your Birmingham 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 Birmingham site.
Local planning guidance
Which planning authority covers a development in Birmingham?
Birmingham City Council determines ordinary planning applications across Birmingham, including the city centre, Edgbaston, Erdington and Sutton Coldfield. The West Midlands Combined Authority is the regional LNRS responsible authority, not the local planning decision-maker. Sandwell, Solihull and Coventry are separate councils even when a postal address or road corridor lies near the Birmingham boundary.
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.
The adopted Local Plan and biodiversity policies
Birmingham's operative strategic plan is the Birmingham Development Plan (BDP) 2031, adopted 10 January 2017. The Development Management in Birmingham DPD, adopted 7 December 2021, supplements the strategic plan with detailed development-management policies and replaced remaining saved 2005 UDP policies.
| Policy or development-plan document | Current adopted status | What it means for an applicant |
|---|---|---|
| Birmingham Development Plan 2031 | Adopted 10 January 2017, principal strategic Local Plan | Apply current city-wide and allocated-site strategy, including ecological protection and green infrastructure. |
| TP8 — Biodiversity and Geodiversity | Adopted BDP ecology policy | Identify protected sites, important habitats and ecological corridors before designing avoidance, mitigation and statutory gain. |
| Development Management in Birmingham (DMB) | Adopted 7 December 2021 | Use current detailed city development management policies, not superseded saved 2005 UDP paragraphs. |
| Approved area plans and site-specific documents | Adopted or material only where relevant to mapped parcel | Check city centre, strategic development and neighbourhood policy boundaries; do not assume a promotional masterplan is an adopted consent. |
Birmingham City Council explains that biodiversity and geodiversity are material planning considerations whether or not a feature is statutorily designated. Its planning guidance supports avoidance of harm and further improvements. The current national statutory metric must be applied in addition to these adopted local-policy protections, not as a replacement.
Which Local Plan proposals are still emerging?
The council is preparing a replacement Birmingham Plan, with issues/options and preferred-options work undertaken since 2022. The public portal and related sustainability appraisal documents discuss future housing, green belt and biodiversity choices, but no adopted replacement superseding the 2017 BDP/2021 DMB had been verified by 10 November 2026.
Published historical timetable targets for consultation/adoption were ambitious and may now be out of date. Do not treat an expired timetable date as proof of Regulation 19, submission or adoption. Applicants should check the actual Birmingham Plan portal and current status for later development proposals.
Local planning guidance
Which Local Nature Recovery Strategy applies?
The West Midlands Local Nature Recovery Strategy was approved by the WMCA Board in November 2025 and publicly launched 27 November 2025. It covers the seven metropolitan unitary councils, including Birmingham, and outlines 62 nature-recovery actions across urban green space, trees, waterways and habitats.
For Birmingham, this can guide connected parks, River Rea/Tame enhancement, canal corridors, priority woodland, grassland and tree networks. Nevertheless, only the appropriate final mapped measure matched to the actual proposed habitat may support enhanced strategic significance under the statutory metric; there is no automatic uplift across the whole WMCA area.
View the official nature-recovery source for its current publication status, actual mapped measures and applicable technical notes.
Local planning guidance
Local habitats and site considerations
Use habitats within and connected to your site to scope surveys and retain important ecological connections.
Sutton Park SSSI and National Nature Reserve
Sutton Park is a nationally designated Site of Special Scientific Interest and National Nature Reserve with heathland, woodlands, seven lakes, wetlands and marsh. Birmingham City Council reports around 2,400 acres of landscape. Projects affecting the site or its setting must consider designation, relevant species, recreational pressures and habitat condition separately from BNG units.
River Rea, River Tame and urban green corridors
The River Rea in Digbeth and the River Tame corridor connect neighbourhoods and industrial land. Birmingham's own monitoring records describe earlier schemes intended to improve riverside habitat around the Rea and Tame, demonstrating the relevance of green and blue infrastructure in redevelopment. A site-specific river condition or habitat assessment is needed where direct effects arise.
Urban brownfield, canals and biodiversity networks
The city centre has extensive hardstanding, canals, railway edges, green roofs, street trees and derelict plots. Some previously developed land may support open mosaic habitat, scrub or important species; other sites are truly sealed. A UKHab survey distinguishes those cases before metric assumptions or early vegetation clearance.
A habitat being found elsewhere in the area does not prove it exists on the proposed development site. Existing priority habitats, species and condition must be assessed against the actual parcel and impacts.
Separate designated-site and planning obligations
Birmingham's two SSSIs include Sutton Park and Edgbaston Pool. Other habitats are protected at local site level, including Sites of Importance for Nature Conservation along river and canal corridors. An applicant should screen protected habitats and tree/roosting potential, particularly when a major site allocation adjoins ecologically sensitive land.
A project near Sutton Park may need evidence of direct habitat impacts or recreational effects, but Request the current applicable council schedule and project-specific habitat quotation. Local designation/HRA and species legislation must not be treated as satisfied by a 10% metric calculation alone.
A 10% biodiversity metric gain does not automatically discharge Habitats Regulations Assessment, protected-species licensing, nutrient restrictions or a specific local mitigation obligation. Scope those routes before assuming units will solve every ecological planning issue.
Local planning guidance
What local development and regeneration examples show
Birmingham Smithfield is a published city-centre regeneration project covering around 17 hectares in council material, with phase-one infrastructure/construction expected from 2026 and later building plots. The council's 2025 programme described archaeology before redevelopment and a multi-year regeneration timetable.
This is an illustrative urban growth and landscape-planning context. For constrained city plots, high-quality biodiversity outcomes depend on surveying the existing baseline, retaining mature trees/connected habitats, and securing realistic green roof/SuDS/landscape management rather than assuming every public-space design feature counts as habitat units.
Local planning guidance
What has Birmingham reported about river corridor schemes?
Birmingham City Council's 2021–22 monitoring report references planning decisions 2016/08273/PA for improvements to the urbanised River Rea corridor in Digbeth and 2020/08399/PA for habitat improvements along the River Tame in Witton. These council-reported projects illustrate river-corridor enhancements in defined locations.
Their relevance for today's BNG is the value of protecting/renaturalising watercourse links in dense development. A developer should not convert historic statements about ecological improvement into current habitat units without the relevant statutory baseline, metric version, approved allocation and management records.
A project that touches a river or canal may also require assessment of water quality, flood risk and species obligations independent of metric area habitat units.
Local planning guidance
Ecological evidence for a planning application
Birmingham City Council publishes BNG application guidance and an ecology/geology assessment pathway. It requests site-appropriate ecological information where land or buildings may affect important assets, even where the habitat is not part of a nationally designated site.
For relevant planning applications, submit current national BNG baseline, statutory metric and habitat plan, plus proportionate PEA/EcIA, protected-species, tree or watercourse evidence as dictated by the site. In constrained urban schemes, designers should show how significant green roofs, public-realm planting or SuDS habitats can be legally managed; not every private curtilage planting area is significant for 30-year obligations.
For mandatory BNG, national application information normally includes an applicability statement, pre-development biodiversity value, completed statutory metric and tool version, any relevant earlier baseline or habitat-degradation explanation, irreplaceable habitat information and a scaled onsite-habitat map with north indicated.
For assessment scope see the ACP BNG survey guide and BNG assessment service.
Local planning guidance
Does statutory 10% BNG apply to this development?
Normally, qualifying developments in England must deliver at least 10% statutory Biodiversity Net Gain. Under reforms effective 6 August 2026, a new application for a whole development site of 0.2 hectares or less can be exempt if no onsite priority habitat is adversely affected. Certain wholly temporary developments of five years or less can qualify, and the former dedicated self-build/custom-build exemption was removed for relevant new applications.
Application date, section 73 history, the actual red-line site, development class, priority habitat and other exemptions matter. A small building or household proposal is not automatically subject to the same rules. The ACP exemptions guide explains the main decision process.
The 29 September 2026 NPPF N1(2)/N2(3) limits local compulsory BNG above the national minimum to specific, justified and deliverable site allocations. Do not assume a general 20% requirement from a withdrawn, superseded or emerging planning document.
Local planning guidance
How to calculate biodiversity units correctly
As of 10 November 2026, the latest government statutory biodiversity metric workbook is version 1.1.1, updated 10 November 2026. GOV.UK allows other published statutory metric versions where appropriate. Pre-statutory Metric 4.0 is not a valid statutory submission tool. The Small Sites Metric can be used only for qualifying smaller schemes.
The WMCA LNRS is published, so the current statutory metric can use appropriately mapped actions and matching proposed habitat interventions for strategic significance where supported. Sutton Park SSSI designation is a habitat-protection fact, not automatic permission for numerical replacement or a 15% score at another site.
The calculator considers habitat type, extent, condition, strategic significance, creation/enhancement risk and separate hedgerow or watercourse units. An LNRS opportunity polygon alone does not guarantee a High multiplier. Read our statutory biodiversity metric guide or Small Sites Metric guidance.
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.
Onsite habitat, registered offsite units and delivery
Birmingham's high urban density can constrain onsite 10% gain. Vegetated roofs, carefully specified street trees, riparian restoration or SuDS can contribute if they meet metric definitions and management rules. Registered offsite units may be suitable for a remaining shortfall after habitat trading and the current gain hierarchy.
WMCA's nature investment programme and proposed regional habitat-bank work are important market context but are not proof that a particular Birmingham unit is registered and available at a fixed price. Check actual gain-site registration, habitat type, spatial risk, allocation and legal documents.
For major development the statutory hierarchy generally prioritises suitable onsite habitat creation/enhancement. For eligible non-major new applications from 6 August 2026, onsite and registered offsite gains may be considered at an equivalent hierarchy level. Statutory credits remain the last option.
Significant onsite and registered offsite gains usually need secure management for at least 30 years. A suitable Habitat Management and Monitoring Plan and a Biodiversity Gain Plan set out realistic establishment, legal security, management and monitoring. The statutory register confirms actual legally registered and allocated offsite units, not a supplier brochure.
For unit procurement principles, see offsite biodiversity units.
What affects BNG assessment costs?
Birmingham assessment costs vary widely between a predominantly sealed town-centre parcel and a scheme near Sutton Park or a river. Building/bat surveys, tree protection, habitat condition, watercourse assessment and phased green infrastructure can materially affect scope.
Birmingham Smithfield's regeneration budget is not a proxy for biodiversity-unit prices or ACP fees. Keep planning/ecology report costs, protected sites/species work, registered units, monitoring and any actual council planning/legal fees separate.
Survey/metric fees, protected-site or species mitigation, legally secured offsite biodiversity units, authority/legal monitoring and long-term habitat management are distinct cost categories. No universal Birmingham biodiversity-unit price or local council charge is asserted without a current source. Check the ACP BNG costs guide for typical cost drivers.
Local planning guidance
A documented local planning or nature-recovery example
In its 2021–22 Authority Monitoring Report, Birmingham City Council recorded decisions intended to enhance sections of the River Rea and River Tame, with published planning references 2016/08273/PA and 2020/08399/PA. Those records illustrate habitat enhancement within an urban ecology network.
These are older planning records and predate the current mandatory BNG regime. Their status must not be advertised as current statutory gain-plan approvals, measured achieved biodiversity units or ACP project outcomes.
Your site checklist
Seven checks before submitting a Birmingham BNG assessment
Use these seven checks to prepare a proportionate brief for your site assessment and planning submission.
| Check | What to collect | Decision supported |
|---|---|---|
| 1. Confirm the decision-maker | Check the red-line boundary for employment parks, canal/river corridors and sites adjoining Sutton Coldfield or the West Midlands green belt. The metropolitan **West Midlands county** and the wider **West Midlands English region** have different geographic scopes; this page owns Birmingham only. | Use the actual adopted planning policies and correct local validation list. |
| 2. Test national BNG eligibility | Full red-line area, application date, priority habitat impact, development type and any section 73 history | Check 6 August 2026 exemptions before assuming a metric is mandatory. |
| 3. Map existing habitat | UKHab parcels, condition, hedgerows, trees, watercourses and protected-species features | Select the correct baseline and appropriate statutory metric modules. |
| 4. Check nature recovery | West Midlands Combined Authority LNRS published 27 November 2025 — use its current official Local Habitat Map and site-specific proposed measures | Test strategic significance using actual published status and mapped habitat intervention. |
| 5. Identify special ecological duties | Sutton Park SSSI/NNR and Edgbaston Pool SSSI, River Rea/Tame, canals, possible bats in older buildings, urban trees and brownfield open mosaic. | Check separate HRA, licensing, nutrient or habitat protection before counting units. |
| 6. Plan a realistic gain | Onsite space, habitat trading and actual registered/allocated offsite units | Avoid relying on a marketing listing or assumed spatial-risk score. |
| 7. Secure management | Land manager, funding, legal agreement where required, HMMP and monitoring schedule | Prepare the relevant final gain plan and long-term management commitments. |
Project support
How ACP can help with your Birmingham 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.
Local planning guidance
Birmingham Biodiversity Net Gain FAQs
These answers cover common planning, habitat and delivery questions for projects in Birmingham.
Which council deals with Birmingham BNG applications?
Birmingham City Council is the unitary LPA for Birmingham. The West Midlands Combined Authority is responsible for the metropolitan LNRS, not individual planning permissions; neighbouring Sandwell, Solihull or Coventry have their own adopted plans.
Which Birmingham planning policies currently apply?
The Birmingham Development Plan was adopted on 10 January 2017, including TP8 Biodiversity and Geodiversity. The Development Management in Birmingham DPD was adopted 7 December 2021 and adds detailed policies.
Is the new Birmingham Plan adopted?
No final adoption replacing the 2017 BDP and 2021 DMB was verified on 10 November 2026. Earlier options and dated timetables are emerging evidence, not operative planning policies.
Which LNRS covers Birmingham?
The published West Midlands Combined Authority LNRS, launched 27 November 2025, covers Birmingham and six other metropolitan authorities. It differs from the separately published Warwickshire LNRS.
Does Sutton Park require a separate ecological check?
Potentially. Sutton Park is an SSSI and National Nature Reserve with heath, wetland and woodland. A scheme with relevant impacts requires protected-site consideration; a 10% BNG calculation cannot automatically compensate for ecological harm.
Can a Birmingham city-centre plot be exempt from BNG?
Eligible new applications from 6 August 2026 on whole red-line sites of 0.2 hectares or less may qualify where no onsite priority habitat is adversely affected. Actual habitat and permission history must be checked; not all brownfield plots are ecologically empty.
Could green roofs and rain gardens deliver statutory units?
Potentially, if the habitat types, area/condition, design, metric trading and management obligations are properly recorded. Decorative public space or private garden landscaping does not automatically qualify as significant secured habitat.
Are River Rea improvement schemes evidence of current BNG credits?
Birmingham's historic monitoring report mentions river corridor enhancement proposals, but those predate mandatory BNG and do not prove current government-registered units, allocations or achieved gains.
Does Birmingham have a general 20% BNG rule?
No adopted blanket citywide 20% rule was established here. Qualifying development normally needs 10% national statutory gain; September 2026 NPPF limits compulsory higher standards to specific justified and deliverable allocations.
Can Birmingham schemes buy offsite biodiversity units?
Where eligible and appropriate, yes. Units must be legally registered and allocated and meet habitat trading and spatial-risk rules. A WMCA nature investment programme alone does not establish available units or price.
When is the final gain plan due?
For eligible permissions, ordinarily after planning consent but before commencement. Additional justified ecological or draft delivery evidence may be requested at application stage under the local validation list.
What should I provide to ACP for a Birmingham BNG assessment?
Send the postcode, complete red-line plan, proposed development, drawings, existing ecology reports and expected application date. Mention any tree, watercourse, older building or protected-site impacts if known.
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
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Birmingham BNG
Sources and references
Reviewed 10 November 2026.
Official planning and nature recovery sources
- West Midlands Local Nature Recovery Strategy
- Birmingham Development Plan
- Development Management in Birmingham adopted DPD
- Birmingham Plan
- Do I need an ecological or geological assessment?
- Biodiversity Net Gain planning guidance
- Sutton Park nature reserve
- Birmingham Smithfield Masterplan
- Authority Monitoring Report 2021–22
- GOV.UK Biodiversity Net Gain
- the government statutory metric
- National Planning Policy Framework: biodiversity policies N1 and N2