This page provides general practical guidance and does not replace project-specific legal, engineering, planning, ecological, asbestos or waste advice.
The short answer
Consider ecology early where a structure could provide habitat or where there is evidence of bats, nesting birds or other protected species. Bats and their roosts are protected under the Wildlife and Countryside Act 1981 and the Conservation of Habitats and Species Regulations 2017. Nesting birds are protected during the nesting season. The need for a survey or specialist advice depends on the individual site and proposed work — it cannot be determined from a photograph alone.
Why it matters
Ecological constraints can affect timing and method. Bat surveys can only be carried out during certain seasons, and a roost found after the programme has been fixed can cause significant delay. Early assessment allows any constraints to be built into the programme rather than discovered once mobilisation is planned.
Information that may be needed
Site photographs, information about the structure, evidence of wildlife and any previous ecological reports may be useful. A preliminary ecological appraisal (PEA) or bat survey report, where one exists, should be shared before the scope is finalised.
What can affect the scope
The building type, condition, location, visible evidence, season and proposed work can all affect the need for further assessment. Older buildings, buildings with roof voids, and structures in or near woodland, hedgerows or water are more likely to require assessment.
When specialist input may be needed
A suitably qualified ecologist is required where the site or evidence indicates a potential issue. Where a European Protected Species licence is needed, this must be obtained before work begins.