A Preliminary Ecological Appraisal (PEA) usually involves a Phase 1 Habitat Survey (P1HS) or Extended P1HS, to appraise the ecology of a site. A PEA is often one of first surveys to be undertaken when establishing restrictions around planning.

As a PEA can form a key part of planning a development, and can inform elements of the development, we recommend as early as possible in the planning process.

Prior to any surveys taking place an analysis of the site will be made, using maps and satellite images, to highlight potential habitats, any adjacent protected areas and known presence of species.

During surveys for a Preliminary Ecological Appraisal, we identify areas which may pose risks to a proposed development, such as: presence of nesting birds, newts, bats, invasive species, etc. Once any risks are identified, mitigation measures can be planned and costed at an early stage of the planning process.

Matt Liston, our primary ecologist, is vastly experienced in P1HS and Extended P1HS surveys, having undertaken several per week since 2006. Matt has a vast knowledge of the natural world, with specialisms in aquatic environments, birds, invertebrates, amphibians and reptiles. He holds Natural England licences for several protected species.

If protected species are encountered, or likely to be encountered, on site during a standard Phase 1 Habitat Survey (JNCC 2010) then an Extended Phase 1 Habitat Survey is usually required.

The possible presence of protected species will usually require follow-up surveys, such as an Extended Phase 1 survey, which may have to be planned around the seasonal habits of the species. For example, many bats use different roost sites over the colder months as they become torpid or enter hibernation. The presence of bat droppings on a site during winter may require secondary surveys over the summer, to establish the presence of a nursery site or summer roost, dependent upon the planned development. This is most likely if the suspected roost site is located in a building which is planned to be significantly altered or demolished.

A key part of the PEA is the in-depth report compiled after the survey process is complete. This will give full details of our findings. The report categorises the habitats present on site, determines whether the site is likely to support protected species and provides a detailed assessment of potential ecological constraints to development. If required or requested, suggestions for ecological enhancement, such as Biodiversity Net Gain (BNG).

If no potential ecological constraints are found to be present on site, the client may use the report as evidence of this status, in the planning process.

Please contact us to discuss your requirements and the details of your site, so we can help ascertain which type of survey will be most suitable. We are happy to explain, in straightforward terms, any aspect or detail of the survey & appraisal process.

For further information on PEAs, visit the Joint Nature Conservation Committee website.