Ecology, biodiversity net gain, and open space consultancy for local authorities and developers across the UK.

BNG services

BNG Credits

As Biodiversity Net Gain (BNG) becomes embedded in the planning system, access to high- quality, deliverable biodiversity units is essential. We support both developers seeking units and landowners looking to create and sell them.

Ecology that works on the ground

Always someone to talk to

Reducing risk in the planning process

Free quotes and transparent pricing

Balancing ecology with project delivery

Direct access to experienced ecologists

Real-world land management expertise

Supporting sustainable communities

Trusted by Local Planning Authorities

Pragmatic solutions, proportional advice

Helping avoid planning delays

Surveys to BNG units - all in one place

What do I need to know?

Whether you need biodiversity units to unlock development or want to establish a habitat bank on your land, we provide clear, practical guidance at every stage.

If your development cannot achieve the required Biodiversity Net Gain (BNG) uplift on-site, you will need to secure off-site biodiversity units to meet planning requirements.

We support developers with BNG shortfalls by sourcing and securing compliant, deliverable off-site units. Our team ensures habitat types, distinctiveness, strategic location, and metric calculations align with your planning obligations and Local Planning Authority requirements.

Through our habitat bank map, you can view where we have established registered habitat banks and see the types of units currently available. This provides immediate visibility of suitable options within the relevant local authority area or strategic market.

In addition to unit sourcing, we provide BNG brokering services, managing the commercial and technical process from initial enquiry through to agreement. This includes:

Identifying suitable available units

Ensuring habitat and metric alignment

Coordinating with landowners and legal teams

Supporting Section 106 or conservation covenant requirements

Integrating off-site units into your BNG submission

Our focus is on certainty, compliance, and efficiency – helping you resolve BNG obligations quickly and avoid delays to planning or delivery.

Establishing a habitat bank can generate long-term environmental and financial returns while contributing to meaningful nature recovery.

We work with landowners, estates, and investors to design, register, and manage habitat banks that produce verified biodiversity units for sale within the BNG market.

Our support includes:

Baseline habitat surveys and condition assessments

Biodiversity Metric calculations and uplift modelling

Habitat creation and restoration design

Habitat Management and Monitoring Plans (HMMPs)

Registration and compliance guidance

Long-term ecological oversight and monitoring

We ensure habitat banks are ecologically robust, commercially viable, and aligned with local policy priorities. Our practical, land-based approach ensures enhancements integrate seamlessly with farming operations, grazing regimes, and estate management objectives.

With increasing demand for high-quality biodiversity units, well-designed habitat banks represent a significant opportunity to diversify land income while delivering lasting environmental benefits.

Most developments in England must deliver a minimum 10% Biodiversity Net Gain (BNG). However, some types of development are exempt.

Use the guide below to understand whether BNG is likely to apply to your site. If you are unsure at any stage, we can review your proposal and confirm your requirements.

BNG Exemption Flow Guide

Step 1 — Does your project require planning permission?

No

BNG does not apply.

Yes

Go to Step 2.

Step 2 — Is it a householder application?

For example extensions, loft conversions, or domestic outbuildings within residential curtilage.

No

Go to Step 3.

Yes

Exempt from BNG.

Step 3 — Does the development meet the de minimis threshold?

Development is exempt from BNG if it affects:

Less than 25 square metres of on-site habitat

Less than 5 metres of linear habitat (such as hedgerow)

No priority habitat is affected

No

Go to Step 4.

Yes

Exempt from BNG.

Step 4 — Is the development one of the following exempt types?

Self-build or custom build development (meeting statutory criteria)

Development granted temporary planning permission

Biodiversity gain sites (land being enhanced for BNG itself)

Development forming part of the high-speed rail transport network

No

Go to Step 5.

Yes

Exempt from BNG.

Step 5 — Is it permitted development?

Some permitted development may be exempt, depending on the specific class and whether prior approval is required.

No

BNG is likely required.

Yes

Further review needed to confirm exemption.

Important to know

Even very small habitat losses can require BNG if priority habitat is affected. Eligibility for exemption depends on both planning classification and on-site ecological conditions.

Still unsure?

We provide clear, early-stage exemption reviews to confirm whether BNG applies before you progress with planning.  

We can help with:

Checking your development against statutory exemption criteria

Preliminary habitat and site review

Advice before planning submission

Confirming whether a full BNG assessment is required

If you’re unsure whether BNG applies to your site,

we can provide a straightforward assessment and advise on the next steps.

Experienced Surveyors

Our team includes highly experienced, skilled surveyors. 

Proven Track Record

Extensive experience conducting BNG credit assessments across a variety of development projects.

Proportionate Approach

We deliver tailored solutions that balance ecological requirements with development objectives and always consider the most practical solution.  
Team planning session with notes on glass board and meeting in background

Timely Reporting

We provide clear, comprehensive reports to support planning applications. 
Ecologist installing dormouse tube in woodland habitat

Rapid site visit availability

Ensuring minimal delays to development timelines preventing costly delays.

Receive a detailed breakdown
for your project

We provide tailored solutions to help you deliver high-quality, sustainable green spaces. Contact us today to discuss your needs. Whether you require:
Biodiversity net gain
Policy advice
Full strategy
Ecological assessments.

01225 444114

info@ethosep.co.uk