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Features/Land/Biodiversity net gain

Biodiversity net gain.

The statutory metric, habitat parcels and the 30-year monitoring plan.

30 years of monitoring, scheduled.

£25 a month add-on, on any plan

25% off when you take 3 or more land tools.

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General information as at October 2026. Not legal advice; check the regulation or ask a competent person.

Imagery: Esri, Maxar, Earthstar Geographics, and the GIS User Community

Site
Meadow Farm, phase 2
Reference
STE-MDF02
Area
1.9 ha, illustrative
Real imagery; the site and scheme are illustrative.

What it does.

  1. The statutory metric, parcel by parcel.

    Habitat parcels for the baseline and after development, each with habitat group, distinctiveness, condition and strategic significance. Post-development parcels add time to target, difficulty and spatial risk. Units update as you type and are recalculated whenever a parcel changes.

    • Habitat groups such as grassland, woodland, hedgerow and watercourse
    • Distinctiveness 0 to 8, condition 1 to 3
    • Time to target, difficulty and spatial risk multipliers
    • Area, hedgerow and watercourse units totalled separately

  2. 30-year monitoring schedule, generated in one click.

    SAMRISK creates 30 annual monitoring slots from the assessment date. Each year's due date appears on the calendar, and a slot past its date shows as overdue.

    • All 30 slots generated in one click
    • Year-by-year schedule on the assessment
    • Due dates on the site and portfolio calendars
    • Overdue years marked in red on the calendar

  3. Delivery route and the 10% check.

    Each assessment records its assessor and their qualification, the delivery route and its status from draft to monitoring. SAMRISK totals baseline and post-development units and shows whether the net gain meets the 10% minimum.

    • On-site, off-site, statutory credits or mixed
    • Net gain in units and as a percentage
    • Assessor name and qualification
    • Linked metric and ecology documents

Real screens

In the app.

How biodiversity net gain looks in SAMRISK, on the example estate.

app.samrisk.co.uk/sites/meadow-farm-phase-2/bng
Net gain against the statutory 10 per cent, and the 30 years of monitoring that follow. Illustrative records.
Biodiversity net gainNet gain against the statutory 10 per cent, and the 30 years of monitoring that follow. Illustrative records.

The example estate; records are illustrative.

Connects to.

Feeds it

  • It starts the threadIts records sit on the same buildings, sites and people as every other tool.
Biodiversity net gainLand

It feeds

  • CalendarInspections, deadlines and visits from every tool in one calendar, with an iCal feed.

Questions.

Is the calculator the official DEFRA tool?

No. The statutory biodiversity metric tool published by DEFRA is authoritative. SAMRISK's calculation is a simplified working version for planning and tracking, so submit the official metric with your application.

What about off-site BNG and statutory credits?

Yes. Choose on-site, off-site (with the provider's name), statutory credits (with the units purchased) or a mix.

Can I link the assessment to a planning consent?

Not from the screen yet. Record the consent reference in the assessment notes and attach the decision notice.

Related tools.

  • CalendarInspections, deadlines and visits from every tool in one calendar, with an iCal feed.Free
  • Boundaries and titleTitle, easements, covenants and party walls, drawn on the map.In Business, or £15
  • Grounds and treesTrees, hedges and landscape assets with QR tags and inspections.In Business, or £15
  • Tree preservation ordersProtected trees, consent applications on the eight-week decision clock, and six-week notices for trees in conservation areas.In Business, or £10

Keep 30 years of biodiversity net gain on one record.

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