Calculating and Using Biodiversity Units


This course provides training on biodiversity unit calculations based on Defra’s guidance. It is for individuals wishing to develop or enhance skills in undertaking and using biodiversity unit calculations.


Through presentations, case studies and practice sessions, the course focuses on biodiversity unit calculations for development footprints (baselines), habitat clearance, site restoration landscaping, offset proposals and offset monitoring including:
• Translating Phase One and landscape-design habitats into ‘biodiversity unit’ habitats
• Undertaking condition assessments using the Farm Environment Plan (FEP)
• Addressing situations when no relevant FEP condition assessment
• Using multipliers for offsets
• Developing easy-to-use survey datasheets
• Reporting formats for calculations
• Undertaking technical and 'QA' reviews

Case studies are presented on using biodiversity units to understand whether a development achieved ‘no net loss’ through combinations of on-site planting and offsets. Practical sessions are then held on range of offsets types for attendees to be able to estimate the type and amount of offset needed to achieve ‘no net loss’ and ‘net gain’ targets.

Finally a brief overview is given on applying biodiversity units in combination with ecological impact assessments to design ‘no net loss’ and ‘net gain’ projects.

Who Should Attend?

Ecological consultants who undertake and/or technically review biodiversity unit calculations, and design 'no net loss' and 'net positive' projects;
EIA practitioners, sustainability and environmental managers working on projects that involve biodiversity unit calculations and/or technically review biodiversity units;
Local authority ecologists and planners working on projects that involve biodiversity unit calculations and/or technically reviewing biodiversity unit calculations;
Conservation officers and individuals undertaking biodiversity unit calculations and/or reviewing biodiversity unit calculations of development sites and offsets.

Knowledge Level

Beginner - Intermediate

Prior Knowledge

This course is aimed at individuals with no previous experience in or knowledge of biodiversity unit calculations as well as those with some experience and wishing to develop their skills and gain further knowledge.

Learning Outcomes

  • Design field surveys to obtain the information needed for biodiversity unit calculations of development sites and offset proposals.
  • Undertake the habitat condition assessments required for biodiversity unit calculations and be better able to address any limitations that may arise.
  • Undertake biodiversity unit calculations for both development sites and offset proposals.
  • Undertake technical checks and Quality Assurance reviews of biodiversity unit calculations.


The course fee includes refreshments throughout the day. Lunch is not included.


Tickets Person(s) Price
Member Ticket 1 £110.00
Non Member Ticket 1 £180.00