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Biodiversity Net Gain Assessment

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Nationwide BNG assessments

Biodiversity Net Gain is now a mandatory consideration for most planning applications across England, requiring developers to demonstrate measurable improvements to biodiversity as part of their project. Under the Environment Act 2021, developments must deliver a minimum 10% net gain in biodiversity, secured for at least 30 years.

Failing to meet BNG requirements can result in significant delays to planning approval, increased costs, or the need for off-site offsetting — which many local authorities and stakeholders may resist. As a result, responsible developers, landowners, and financial institutions increasingly require early-stage ecological input to ensure compliance and manage risk.

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BNG Report you'll receive

Gradwell Group has a highly experienced team of BNG assessors, operating nationwide across the UK. All our assessors are fully qualified, accredited, and insured. Our field teams are supported by a dedicated in-house technical department, enabling us to deliver Biodiversity Net Gain reports swiftly and with precision. We work to the highest industry standards to ensure your project meets both planning requirements and environmental targets.

At Gradwell Group, we combine intelligent software with expert insight to deliver high-quality BNG reports. While the system generates an initial set of biodiversity recommendations, our assessors thoroughly review and refine these—removing any that are unsuitable for your site and incorporating bespoke suggestions based on real-world conditions. This approach ensures that, although some advice may appear standard, the final report you receive is accurate, relevant, and actionable for your specific project.

How it works

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Step 1
Get your
Free quote
Simply request your quote using our contact form or by phone. Our customer care team will quickly get in touch during opening hours.
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Step 2
Survey & Payment
We will arrange an appointment with you, carry out the survey, and once completed send you an invoice.
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Step 3
Get Your report
As soon as we receive payment of the invoice, we will email your BNG Report

BNG Assessment Report details

Our team of highly experienced ecological consultants provides Biodiversity Net Gain assessments across the UK, supporting planning applications from small-scale developments to major infrastructure schemes. All our ecologists are fully qualified, professionally accredited, and insured.
supporting planning applications from small-scale developments to major infrastructure schemes. All our ecologists are fully qualified, professionally accredited, and insured.

Understanding Biodiversity Net Gain

The concept of Biodiversity Net Gain (BNG) is a transformative approach to development and conservation, ensuring that post-construction environments exhibit greater biodiversity than before. This principle has been made compulsory for all new developments across England, including those deemed nationally significant infrastructure projects. Beginning in February 2024, the legislation stipulates that these projects are required to deliver at least a 10% improvement in terms of biodiversity value. Developers can achieve this net gain by enhancing on-site natural features or supporting off-site ecological improvements—or alternatively by securing statutory biodiversity credits that represent quantified increases in nature’s richness.

Established through the Environment Act passed in November 2021, BNG aims for long-lasting positive impacts on ecosystems from every development project undertaken. As part of its guidelines, developers must ensure any habitat enhancements last no fewer than three decades—a provision put forth to guarantee enduring advantages for wildlife and plant life alike.

Going beyond mere compliance with legal requirements, achieving BNG presents an avenue for constructive engagement with environmental stewardship among developers. Pursuing strategies aligned with BNG principles empowers them not only to mitigate but also reverse declines in native species and habitats while fostering sustainable growth within their sectors—marking a commitment toward bolstering our planet’s biological diversity through conscious building efforts.

Habitat Enhancement Strategies

Strategies for enhancing habitats are critical to securing a net gain in biodiversity. These strategies strive to both establish new habitats and elevate the condition of existing ones, thereby bolstering species diversity and the functions they provide within ecosystems. Should prior measures fall short of attaining the targeted biodiversity net gain, it becomes imperative to forge new habitats at the project site itself. To this end, initiatives might encompass sowing indigenous plant species, rehabilitating deteriorated environments, or constructing passages that facilitate wildlife movement.

At a local level, Nature Recovery Strategies play an instrumental part in guiding how and where these gains in biodiversity should be achieved – pinpointing specific locations along with suitable types of habitat development involved. This ensures that any enhancement efforts undertaken align strategically with ecological needs for maximum impact.

By deploying robust strategies aimed at fostering habitat improvements effectively, developers not only significantly boost on-site biological diversity but also contribute positively towards overarching objectives focused on conservational outcomes.

Calculating Biodiversity Units

Achieving biodiversity net gain necessitates the accurate calculation of biodiversity units. For development projects to satisfy prescribed criteria, they must engage the statutory biodiversity metric when evaluating these units. This assessment hinges on various aspects such as type, size, distinctiveness, condition, and strategic location of habitats, which are essential in precisely determining the number of biodiversity units and confirming that there is a net gain.

During major developments’ planning process stages, it’s mandatory for them to integrate this standardized biodiversity metric into their assessments. The application ensures uniformity and precision across diverse initiatives concerning evaluations related to natural diversity. Accurate delineation and measurement of habitat areas using this metric tool are pivotal for accurately representing their value for biological diversity. Optimizing design processes through continuous use with an aim towards enhancing overall gains in biological diversity becomes crucial for developers.

In cases involving irreplaceable habitats—considered typically beyond compensation due to their unique characteristics—it’s acknowledged that they do not add toward measurable increases in ecological richness unless accompanied by particular enhancement measures aimed at augmenting them directly or indirectly while ensuring conservation efforts persist unharmed by developmental impacts. Therein lies a key principle behind preserving ecosystems’ core values among development undertakings according to targeted standards set out by regulations governing how environments benefit from proposed activities via documented evidence showcasing compliance alongside beneficial contributions geared towards sustaining nature’s variety.

The Role Of Biodiversity Net Gain

Biodiversity net gain assessments form the core of the BNG system, designed to enhance biodiversity value after development takes place. The purpose is to measure and compare a site’s ecological worth before any changes occur and following completion of the project. Such assessments use an established statutory biodiversity metric that provides uniformity and precision in measurement. To establish improvement benchmarks, these evaluations focus on capturing pre-development biodiversity values, which stay unaltered throughout the duration permitted for planning.

The standardized method applied across England to appraise relative biodiversity value during development projects comes from DEFRA’s statutory biodiversity metric. It serves as a benchmarking tool facilitating comparisons between different developments by quantifying their effects on local ecosystems consistently. This mechanism ensures developers are aware of how their projects impact ecological balance while mandating compensatory enhancements or exceeding them where losses occur.

Completing a B&D assessment necessitates meticulous recording of existing environmental elements and living habitats at risk within developmental areas—identifying all relevant species along with significant ecosystems present beforehand. Gathering such comprehensive data is crucial when devising an effective plan aimed at securing not just compensation but actual advances in post-development biodiversity through clearly laid out strategies demonstrating attainable net gains over time.

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Habitat Enhancement Strategies

Strategies for enhancing habitats are critical to securing a net gain in biodiversity. These strategies strive to both establish new habitats and elevate the condition of existing ones, thereby bolstering species diversity and the functions they provide within ecosystems. Should prior measures fall short of attaining the targeted biodiversity net gain, it becomes imperative to forge new habitats at the project site itself. To this end, initiatives might encompass sowing indigenous plant species, rehabilitating deteriorated environments, or constructing passages that facilitate wildlife movement.

At a local level, Nature Recovery Strategies play an instrumental part in guiding how and where these gains in biodiversity should be achieved – pinpointing specific locations along with suitable types of habitat development involved. This ensures that any enhancement efforts undertaken align strategically with ecological needs for maximum impact.

By deploying robust strategies aimed at fostering habitat improvements effectively, developers not only significantly boost on-site biological diversity but also contribute positively towards overarching objectives focused on conservational outcomes.

How do I book?

To get a quote for a Biodiversity Net Gain (BNG) report for your site, simply give us a call on 01827 284488, or fill in our contact form and a member of our team will be in touch shortly.

We require the following details to provide an accurate survey price:

Red line boundary plan
Site plan
Landscape layout plan

Once you've accepted our quote, we’ll just need your invoicing details and the contact information for the person who will meet us on site. We don’t require upfront payment—an invoice will be issued upon completion of the survey, and your BNG report will be released once payment is received. Our pricing is all-inclusive, covering all analysis, reporting, and quality assurance, so the amount quoted is the total price you’ll pay—no hidden fees.

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Key Components of a Biodiversity Net Gain Plan

A critical aspect of sustainable development is the Biodiversity Gain Plan, which outlines mandatory steps that developers must take to ensure they meet biodiversity net gain requirements. The plan should comprehensively specify how a minimum of 10% increase in biodiversity value will be realized through various enhancement and mitigation efforts. It needs to include detailed data encompassing existing biodiversity metrics as well as comparisons between pre-development and post-development scenarios.

The two principal elements within the Biodiversity Gain Plan are strategies for habitat improvement and measures for mitigating harm. Enhancement strategies concentrate on constructing and enriching habitats, aiming to bolster species diversity along with ecosystem services. Mitigation tactics strive to minimize detrimental effects on these environments while compensating for any inevitable damage caused by development activities so that overall net gains in post-development biodiversity are guaranteed.

Habitat Enhancement Strategies

Strategies for enhancing habitats are critical to securing a net gain in biodiversity. These strategies strive to both establish new habitats and elevate the condition of existing ones, thereby bolstering species diversity and the functions they provide within ecosystems. Should prior measures fall short of attaining the targeted biodiversity net gain, it becomes imperative to forge new habitats at the project site itself. To this end, initiatives might encompass sowing indigenous plant species, rehabilitating deteriorated environments, or constructing passages that facilitate wildlife movement.

At a local level, Nature Recovery Strategies play an instrumental part in guiding how and where these gains in biodiversity should be achieved – pinpointing specific locations along with suitable types of habitat development involved. This ensures that any enhancement efforts undertaken align strategically with ecological needs for maximum impact.

By deploying robust strategies aimed at fostering habitat improvements effectively, developers not only significantly boost on-site biological diversity but also contribute positively towards overarching objectives focused on conservational outcomes.

Key Components of a Biodiversity Net Gain Plan

A critical aspect of sustainable development is the Biodiversity Gain Plan, which outlines mandatory steps that developers must take to ensure they meet biodiversity net gain requirements. The plan should comprehensively specify how a minimum of 10% increase in biodiversity value will be realized through various enhancement and mitigation efforts. It needs to include detailed data encompassing existing biodiversity metrics as well as comparisons between pre-development and post-development scenarios.

The two principal elements within the Biodiversity Gain Plan are strategies for habitat improvement and measures for mitigating harm. Enhancement strategies concentrate on constructing and enriching habitats, aiming to bolster species diversity along with ecosystem services. Mitigation tactics strive to minimize detrimental effects on these environments while compensating for any inevitable damage caused by development activities so that overall net gains in post-development biodiversity are guaranteed.

Meeting Biodiversity Net Gain Requirements

The planning process now necessitates adherence to mandatory biodiversity net gain stipulations, as enforced by the Environment Act. It is a requirement that all development projects bring about at least a 10% enhancement in terms of biodiversity value, with this improvement being quantified using the Biodiversity Metric. As a result, developments are expected not only to avoid damage but also to actively enhance local ecosystems. Local plans must clearly depict how they will achieve these gains through various development initiatives.

It falls upon local planning authorities to review and confirm the accuracy of developers’ submissions concerning their calculations according to the Biodiversity Metric, ensuring compliance with established standards. A prerequisite for initiating any form of development includes obtaining approval for a Biodiversity Gain Plan from the relevant local planning authority under an imposed biodiversity gain condition—a plan which has robust evidence supporting anticipated net gains essential for granting permission for construction activities.

When recent changes within habitats have been minimal or non-existent, developers may incorporate data from past surveys into current assessments. This provision allows them to use historical yet reliable habitat information in fulfilling requirements where applicable. There exists an obligation spanning no less than 30 years regarding maintenance enhancements tied directly to on-site habitats as part of ongoing planning obligations—this extended timeframe ensures that achieved biodiverse benefits persist well into future decades.

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Off-Site Biodiversity Gains

When on-site habitat improvements do not suffice to fulfill net gain objectives, off-site biodiversity gains become essential. These can be acquired by entering into either conservation covenants or Section 106 agreements with the understanding that both cannot be used simultaneously. Developers have the option to acquire off-site biodiversity units from landowners who undertake enhancements on their property or purchase credits from state-sanctioned habitat banks, offering a solution for developers to satisfy biodiversity net gain requirements when they are unable to achieve them onsite.

To encourage developers first and foremost towards improving habitats at development sites themselves, biodiversity credits carry costs above typical market values - elevating on-site advancements as primary over alternate offsite solutions in terms of consideration.

Local planning authorities bear the responsibility for monitoring whether offsite gains are properly recorded and attributed. These intrinsic achievements must endure a minimum period of thirty years upkeep. Through securing such external contributions towards ecological improvement, constructors can reach mandated benchmarks for net gain while also aiding wider preservation initiatives.

The Biodiversity Gain Hierarchy

The Biodiversity Gain Hierarchy offers a structured approach for attaining biodiversity net gain, emphasizing the execution of the most efficacious measures first. The hierarchy provides an ordered strategy to enhance positive outcomes for biodiversity where foremost actions are directed at completely sidestepping impacts on biodiversity. In scenarios where avoidance is unfeasible, it progresses through minimizing negative effects, restoring affected habitats, and compensating any remaining detrimental impacts.

Biodiversity Gain Plans must reflect developers’ compliance with this prioritized framework by showcasing strategies employed to circumvent, reduce and rectify harm to biodiversity before resorting to compensation options. Regulatory bodies responsible for planning must take into account how well these plans adhere to the hierarchical structure when evaluating them.

Adhering strictly to the steps laid out in the Biodiversity Gain Hierarchy enables projects not only meet obligatory requirements but also contribute beneficially towards achieving a net increase in biodiversity. This methodical process underscores initiatives that yield maximum advantages for biodiverse ecosystems while managing potential repercussions in an efficient manner.

BNG For Planning Permission

Engaging with local planning authorities early on can make navigating the complexities of biodiversity net gain in the planning process more straightforward. This proactive approach ensures that considerations for biodiversity net gain are woven into the project from its inception.

The National Planning Policy Framework endorses initiatives aiming to achieve a quantifiable increase in biodiversity value, setting forth guidelines for both developers and local planning authorities to integrate these gains within various stages of development. A key stipulation is fulfilling a minimum 10% enhancement in biodiversity value as part of securing permission for projects.

Subsequent to obtaining approval for plans, it’s imperative that an endorsed Biodiversity Gain Plan be presented before any construction commences. Local authorities may necessitate supplemental details concerning how developments will meet requirements related to net gains in biodiversity when reviewing applications. Developers who proceed without sanctioned Biodiversity Gain Plans risk enforcement measures being taken against them. Successfully managing this aspect of the development process not only aligns with regulations, but also contributes beneficially towards preservation efforts.

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“Outstanding service from start to finish. The team at Gradwell Ecology were professional, knowledgeable, and incredibly responsive. They guided us through the entire biodiversity assessment process with clarity and care. The report was delivered on time and tailored specifically to our site. We felt completely supported and confident in meeting our planning requirements. Highly recommended!”

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Such fantastic staff
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Such fantastic staff
Such fantastic staff, everyone I spoke to was so friendly and quick working. Would re...
Ilki Jackson, 5 days ago
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Such fantastic staff
Such fantastic staff, everyone I spoke to was so friendly and quick working. Would re...
Ilki Jackson, 5 days ago
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Such fantastic staff
Such fantastic staff, everyone I spoke to was so friendly and quick working. Would re...
Ilki Jackson, 5 days ago
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Such fantastic staff
Such fantastic staff, everyone I spoke to was so friendly and quick working. Would re...
Ilki Jackson, 5 days ago
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Such fantastic staff
Such fantastic staff, everyone I spoke to was so friendly and quick working. Would re...
Ilki Jackson, 5 days ago
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Frequently Asked Questions

FAQ Section

What is Biodiversity Net Gain (BNG)?
How is the pre-development biodiversity value calculated?
What are the long-term habitat management requirements for BNG?
Can off-site biodiversity units be used to meet BNG requirements?
What is the role of the Biodiversity Gain Hierarchy in BNG?
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