Question 1

What is a BNG assessment in the UK?

Accepted Answer

A Biodiversity Net Gain (BNG) assessment is a mandatory calculation for most UK planning applications since February 2024, under the Environment Act 2021. It measures the biodiversity value of a development site before and after construction using the Statutory Biodiversity Metric 4.0, and the developer must deliver at least a 10% uplift in biodiversity units. BioNetGain Pro produces a legally compliant BNG report in under 30 minutes.

Question 2

How much does a biodiversity net gain report cost in the UK?

Accepted Answer

A BioNetGain Pro BNG report starts at £95 for sites under 0.1 hectares (micro sites). Pricing scales with site area: small sites (0.1–0.5 ha) from £195, minor developments (0.5–1 ha) from £295, and major developments (1+ ha) from £495. This is 70–90% cheaper than a traditional ecological consultancy, which typically charges £2,000–£8,000 and takes 5–10 working days.

Question 3

Is BioNetGain Pro BNG report legally compliant?

Accepted Answer

Yes. Every BioNetGain Pro report uses the DEFRA Statutory Biodiversity Metric 4.0, produces a Biodiversity Gain Plan (BGP) in the Natural England-accepted format, and includes a 30-year Habitat Management and Monitoring Plan (HMMP) alongside Section 106 or Conservation Covenant legal mechanism drafting. Reports are accepted by all 317 UK Local Planning Authorities.

Question 4

Which development sites need a BNG assessment?

Accepted Answer

Since 12 February 2024 most major developments in England require a 10% BNG uplift. Since 2 April 2024 small sites (fewer than 10 dwellings, or under 0.5 hectares) also require BNG. Nationally Significant Infrastructure Projects (NSIPs) come into scope in late 2025. Exemptions include householder applications, change-of-use without development, and de minimis sites under 25 m² of habitat impact.

Question 5

How does the BNG calculator work?

Accepted Answer

The BioNetGain Pro BNG calculator uses the Statutory Biodiversity Metric 4.0 formula: biodiversity units = area (ha) × habitat distinctiveness × condition × strategic significance × spatial risk × temporal risk. We automate the baseline assessment with AI-processed satellite imagery via our partnership with Gentian True Sight, then apply the developer's planned scenario to calculate post-development units and the 10% gain target.

Question 6

How long does a BNG report take?

Accepted Answer

A BioNetGain Pro report is delivered within 30 minutes of boundary submission. This compares with 5–10 working days for a traditional ecological consultancy. The speed comes from our AI-driven baseline habitat mapping and the automated Metric 4.0 calculation engine.

Glossary Page | Bio Net Gain Pro

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