BNG Calculatorv4.0 / JP039
Statutory Biodiversity Metric v4.0 (JP039)· Defra GOV.UK guidance, last updated 2 June 2026· NSIP extension live 2 November 2026· Reviewed 21 June 2026

South East biodiversity units: habitat bank availability and pricing

Off-site BNG unit supply in South East; covers Kent, Surrey, Sussex, Hampshire, Berkshire, Buckinghamshire, Oxfordshire. Strong supply in lowland mixed deciduous woodland and species-rich grassland; chalk grassland units are pinch-point.

Awaiting MCIEEM peer review · CIEEM (Chartered Institute of Ecology and Environmental Management)

Counties covered

Kent, Surrey, Sussex, Hampshire, Berkshire, Buckinghamshire, Oxfordshire.

Operators with active supply

Environment Bank
SE
£ / unit
£22k-95k
Distinctiveness
Low to High
Availability
Active inventory
Nattergal
SE-adjacent
£ / unit
Quote-only
Distinctiveness
Medium to V.High
Availability
Forward orders
Gaia (marketplace)
SE
£ / unit
£20k-80k listings
Distinctiveness
Low to High
Availability
Live listings

Regional supply commentary

Strong supply in lowland mixed deciduous woodland and species-rich grassland; chalk grassland units are pinch-point. Pricing drawn from the Feb 2026 Biodiversity Units UK market report and cross-referenced against public listings on Gaia and the Defra gain sites register.[S8][S13]

Trading-rule and spatial-risk note

Off-site units sourced inside the LPA carry the 1.0 spatial multiplier; neighbouring NCA discounts to 0.75; outside NCA discounts to 0.5. Combine with the like-for-like trading rule when triangulating compliant supply.