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

BNG baseline survey cost: PEA and UKHab pricing (2026)

A CIEEM-registered PEA plus UKHab baseline survey typically falls in the £1,500 to 4,000 band; survey window, site complexity, and Phase 2 trigger drive the spread.

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

What you actually pay for

The ecologist deliverable comprises a Preliminary Ecological Appraisal (PEA) and a UKHab baseline survey. Headline bands are £1,500 to 4,000 plus VAT; the cheaper end covers a single small parcel with simple habitat composition surveyed inside the optimal window. The higher end reflects multi-day survey, complex mosaics, and write-up of condition assessments per habitat row in the JP039 spreadsheet.[S6]

Survey window

UKHab condition assessment is reliable from April to September; outside that window the surveyor either defers, or surveys at indicative condition and flags a re-visit at planning condition discharge. April / May surveys command a premium in pinch years.

What feeds the JP039 calculator

When Phase 2 species survey is triggered

If the PEA flags potential European Protected Species (great crested newt, bats, dormice, water vole) presence, Phase 2 species surveys are triggered; these add £1,500 to 8,000 per species depending on survey effort. The cost is a separate line item from the BNG baseline.[S6]