Preliminary Ecological Assessment

An initial baseline ecological assessment based on the core principles of British Standard 42020: 2013

British Standard 42020: 2013 : BS42020: 2013 seeks to promote transparency and consistency in the quality and appropriateness of ecological information submitted with planning applications and applications for other regulatory approvals.


What we do

A Preliminary Ecological Assessment (previously known as an Extended Phase 1 Habitat Survey) is the basic starting point for most ecological appraisals of new sites. It is the first step to understanding the ecology on the site and assessing the implications of the proposed development.

It provides a map of the habitats present on a site, and each habitat type is assessed for its potential to support protected or notable species. In addition, a desk study is usually carried out as part of the Preliminary Ecological Assessment to collect any existing ecological data about the site and its surroundings

The Preliminary Ecological Assessment will provide information on:

  • The habitat types present on site, and their nature conservation importance;
  • Which species are present, or potentially present on site;
  • The potential impacts of the development on a particular habitat or species of importance;
  • The legal and planning policy issues that may need to be addressed through appropriate mitigation or further assessment.

The Preliminary Ecological Assessment provides information about the baseline ecology of the site based on a single survey visit. The report may highlight the need to complete further surveys to fully inform planning applications. These could be subject to seasonal constraints.

Additional Services – Ecology Assessments

In addition to Preliminary Ecological Assessments, Middlemarch Environmental has extensive experience of providing cost-effective ecological solutions for all aspects of ecology assessment and can also provide the following services:


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