Preliminary Bat Roost Inspections (PRI)

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What do I need to know about a Preliminary Roost Inspection (PRI)?

A PRI is undertaken as part of the Initial Ecological Assessment when there are buildings (or mature trees) on site that may be impacted by the proposed development works.

A PRI is an initial inspection of the building / tree to assess the suitability for it to contain bats, which are a European and locally protected species. It is a day-time scoping survey that can be undertaken at any time of year. Lots more information on bat surveys can be found on the PDF download button below.

Bat surveys can be a complicated subject...thats why we offer a FREE and no obligation face-to-face site meeting to discuss your requirements and hep you understand the process. 


Why do I need a Preliminary Roost Assessment?

Bat populations have declined drastically throughout Europe (and the world), and as such they are now a protected species in many countries. In Jersey bats (and their roosts) are protected under the Conservation of Wildlife (Jersey) Law 2000, therefore any development which may impact a protected species needs to have an ecological survey undertaken. 


What does a Prelimenary Roost Inspection involve?


What About Costs?

Our report costs start from £375*

Exact costs will depend on the size of your property and the scope & complexity of the works proposed. That is why we offer a free site meeting to discuss your project and ensure the best value report and approach is quoted for.

*An additional charge from the Jersey Biodiversity Records Centre (to get a report on protected wildlife known to the vicinity of your site) may also be required in some circumstances. Additional charges for DNA analysis of droppings may also apply.


Further Information about bat surveys


The States of Jersey Department of the Environment require all bat surveys to follow the Bat Conservation Trust Best Practice Guidelines (Collins 2016) when undertaking surveys for bats. These guidelines can be found here ...but we know that this can all be a bit overwhelming so we have produced a summarised version of this on the PDF link below. Also we are very happy to come to site for a face to face chat to talk you through the process and requirements at no charge!


Can this survey be completed this time of year?

This survey can be undertaken at ANY TIME OF YEAR and may be required as part of your Planning Application



What happens next?

If the PRI shows no evidence or suitability for a building (or mature tree) to contain bats, then a simple report is written which may include some precautionary mitigation measures. It will prove that a scientifically robust survey has been undertaken to show that use of the structure / tree by bats is unlikely, in line with best practice guidelines for survey effort. 

If evidence of bats is found or the buildings show ‘suitability’ for these species, then further surveys may be required – see Protected Species Surveys. Further surveys are typically restricted to certain times of the year so it is important to determine if they are needed as early as possible to prevent delays to your development project.


See what some of our clients have to say about our ecological services

Whilst having any Planning Condition imposed on one’s proposed development plan can be a source of frustration, Nurture Ecology helped us to navigate the best way to meet the requirements of the Department of the Environment. This was achieved in a timely and pragmatic way, and I have no hesitation in recommending them to either assist with ecological planning conditions or more general requirements.

Peter Mossop, Honestead, St.Ouen

Give us a call for no obligation advice and quotation! (01534) 481211

Give us more information

The more information we have about your project the easier it will be to answer any and all of your questions regarding price and availability.

  • Tel01534 481211
  • Visit our officeNurture Ecology Ltd, The Barn, La Ruelle du Coin, St Ouen, JE3 2LL
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