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Biodiversity Appraisal in Dorset

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You may need to have an ecological survey carried out by a suitably qualified person prior to applying for planning permission.

Where a Biodiversity Appraisal is needed

Dorset Local Planning Authorities routinely ask for a Biodiversity Appraisal accompanied by an approved Biodiversity Mitigation Plan (pdf, 452kb) (opens in a new window) (BMP) to be submitted with a planning application. This applies to all development sites of 0.1ha or greater in size or where there are known protected species or important habitats/habitat features. More specifically, a BMP is required for a greenfield or brownfield site greater than 0.1ha, which isn't already being used as a residential or business premises. A BMP covers habitat as well as protected species matters.

Rural barns

A BMP will also be required for any sized site affecting a rural barn where the BMP should be used to secure nesting or roosting opportunities for Barn Owl.

Bat surveys

Dorset Local Planning Authorities will also routinely ask for a bat survey if a development involves the following:

  • any building or structure with an existing bat record or subject to a report of bat activity
  • demolition of an existing house
  • conversion of house attic space - includes installation of roof lights or dormer windows
  • house extensions that tie-in to an existing enclosed roof space
  • renovation or conversion of derelict building (structures with roofs)
  • conversion or demolition of agricultural barns / farm buildings (structures with roofs)

If evidence of bats is discovered a standardised BMP will need to be completed, and submitted with a planning application.

Further information

Information and guidance for householders who need to have a bat survey is available in the  CIEEM Bat Survey Guidelines (opens in a new window)

The  Dorset Biodiversity Appraisal Guidance for Consultants (pdf, 110kb) (opens in a new window) has been written to help ecologists to complete and submit Biodiversity Mitigation Plan forms and ecology reports. To obtain a Word version of the BMP form please contact Natural Environment Team

In addition,  Bat Protocol Flow Chart (pdf, 100kb) (opens in a new window) and Biodiversity Appraisal Survey Request Flow Chart (pdf, 71kb) (opens in a new window)provide further detailed information and guidance in particular to help local authorities to decide when ecological appraisal is required.

Biodiversity Appraisal in Dorset is designed to meet the requirements of the  Natural England Protected Species Standing Advice (opens in a new window)

The scope of Biodiversity Appraisal in Dorset

Development requiring Environmental Impact Assessment (EIA), or development affecting recognised wildlife sites:

  • European / international sites (SAC, SPA, Ramsar)
  • Site of Special Scientific Interest (SSSI)
  • Site of Nature Conservation Interest (SNCI)
  • Local Nature Reserves (LNR)

is outside the scope of this Biodiversity Appraisal process. In these circumstances, the Dorset planning authorities will consult conservation organisations after submission of an application. The planning authority may condition a BMP as a means of clearly identifying and securing mitigation and enhancement measures for developments affecting recognised wildlife sites.

For further advice and enquiries please contact the Natural Environment Team.

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