Early-stage
biodiversity
site screening

Draw a development boundary and get an initial biodiversity feasibility estimate using available UK environmental data.

Initial screening only. Results depend on your inputs, assumptions, and available data. BioGain does not replace an ecological survey or formal advice from a suitably qualified professional.

Try Free Assessment
Free to start
Measure & perimeter
BNG eligibility verdict
Early feasibility

Spot potential biodiversity constraints before committing time and money.

Initial screen, not a planning submission
Free
Core site screening
7
Available environmental data sources
Priority Habitats
Natural England inventory
Species Records
NBN Atlas biodiversity data
Plot accurately, for free
Measure every boundary edge in metres and see live perimeter — no paid CAD tool needed to get your site dimensions right.

Will your development need a Biodiversity Gain Plan?

Enter a UK postcode for an instant, free read on whether BNG rules likely apply to your site.

7
Data Sources
133
Statutory Habitats
Free
Core Screening
2024
Since April Launch

Free to screen. £79 to submit.

Start a site assessment at no cost. Pay a one-off fee only when you need the formal reports to hand to the Local Planning Authority.

Free Screening

£0
  • Draw your boundary and get area + perimeter
  • Measure every edge in metres
  • Instant BNG eligibility verdict (6 Aug 2026 rules)
  • Upload & trace your architect's site plan
  • 7 environmental data sources checked
  • Shareable results link
Start Free

Formal Submission Reports

£79 one-off / site
  • PDF Biodiversity Gain Plan
  • Excel statutory metric workbook (DEFRA 4.0)
  • Statutory CSV for the planning portal
  • Small Sites Metric (SSM) calculation
  • All formats in one unlock — no subscription
  • Generated client-side, nothing leaves your device
Screen First, Unlock Later

Screen early, then commission formal work with better context.

Formal Assessment

  • Site surveys and verified habitat condition
  • Development impact modelling
  • Trading rules and spatial risk
  • Submission-ready professional judgement

BioGain First Pass

  • Free screening + perimeter measurement
  • Available datasets brought together
  • Indicative baseline assumptions
  • Early constraints for discussion

How It Works

1

Find Your Site

Search by postcode or address on the interactive map.

2

Draw the Boundary

Use the polygon tool to outline your development area.

3

Review Available Data

Available environmental datasets are reviewed against the boundary.

4

Unlock Formal Reports

Screen free, then unlock the PDF, Excel and CSV submission packs for £79 when you're ready to file.

7 Environmental Data Sources

Available datasets brought together

Priority Habitats
Natural England
Ancient Woodland
Natural England
SSSIs
Natural England
Flood Risk
Environment Agency
Species Records
NBN Atlas
Soil & Geology
BGS
LIDAR Elevation
USGS/EA

Ready to stop fighting Excel?

Core screening is free. No account needed to start.

Try Free Now See What's Included