BAT ECOLOGY · PLANNING & DEVELOPMENT
Bat surveys for
planning permission.
Understand your building. Plan the right surveys. Move your project forward.
From a preliminary roost assessment to bat emergence surveys, ACP helps you establish what your planning application needs, what it will cost and what happens next.
PRA from £275 + VAT (£330 including VAT)
- 1 · Eaves and access features — gaps, junctions and potential entry points.
- 2 · Roof void and internal evidence — accessible spaces and signs of use.
- 3 · Roof coverings and crevices — tiles, flashing and concealed roost features.
- 4 · Surrounding habitat — connections to trees and potential flight routes.
Roost features, proposed works and surrounding habitat together inform the survey scope.
YOUR PROJECT BRIEF
Start with the planning requirement.
Share the proposed works and the council’s comments. We will identify whether a PRA, further survey work or review of existing evidence is the appropriate starting point.
START WITH THE RIGHT QUESTION
A clear route from council request to survey evidence.
Send us your planning officer’s comments, drawings or existing ecology report. We will identify the relevant survey stage before proposing a fee. A request for a “bat survey” does not always mean night-time surveys are needed.
Preliminary roost assessment
A daytime inspection assesses potential roost features and looks for evidence of bats. Often called a PRA, preliminary bat survey or bat scoping survey.
Explore the inspection →Emergence & further surveys
Where the findings warrant it, targeted fieldwork investigates use of the building, access points and roost characteristics.
Understand the survey work →Reporting & practical next steps
The evidence informs your application, design and programme. Where necessary, the next stage addresses mitigation and licensing.
See the report deliverables →We can review its recommendations alongside your proposals and quote for the appropriate next stage. You do not need to start again automatically.
Tell us about your project →01 / PRELIMINARY ROOST ASSESSMENT
Read the building.
Understand the risk.
A PRA examines whether the structures affected by your project could support bat roosts.
We consider accessible roof spaces, roof coverings, eaves, hanging tiles, cracks and other potential access features. Evidence may include droppings, feeding remains or bats themselves. The assessment also considers the surrounding landscape and the work you intend to carry out.
The report explains the findings, inspection limitations and whether further surveys are needed. Where access is restricted, the implications should be addressed rather than treating an unseen area as clear.
Scope my preliminary assessment →THE QUESTIONS THAT MATTER
What could bats use?
Identify features within and around the structure, including small crevices as well as larger roof voids.
What will the works change?
Relate the findings to roof replacement, demolition, extensions, conversions or changes to access and lighting.
What evidence is still needed?
Set out a proportionate next step, with survey timing and access requirements made clear.
02 / BAT EMERGENCE SURVEYS
Observe how bats use the building.
An emergence survey investigates bats leaving a potential or known roost around dusk. It serves a different purpose from a daytime inspection: it gathers evidence of actual use under suitable survey conditions.
- 1 · Potential emergence point — observe relevant access points and features.
- 2 · Surveyor observation — position to maintain appropriate coverage.
- 3 · Night-vision and recording — select suitable equipment for the survey.
- 4 · Review the evidence — distinguish emergence from passing activity.
A survey design that fits the site
Building size, visibility, potential roost features and previous evidence determine coverage and survey effort. The brief should identify the required visits, survey team and appropriate night-vision or recording methods.
Evidence beyond a bat flying past
Observations and recordings help distinguish emergence from general activity. Interpretation considers species, numbers, timing, access points and the limitations of the evidence.
Findings connected to your proposal
Results inform how works may affect roosts and how impacts can be avoided or addressed. Wider foraging, commuting or lighting questions may need a separate survey scope.
PROGRAMME YOUR PROJECT EARLY
Survey timing can shape your planning timetable.
A PRA can generally be undertaken throughout the year, subject to suitable access and conditions. Emergence work is seasonal. We will confirm an appropriate programme for the species, roost type and survey purpose.
May–September is an indicative summer window, not a guarantee that every date suits every survey. Weather, visit spacing and the type of roost matter; specialist survey purposes can require different timing.
Use the time to complete the PRA, resolve access and establish any further survey requirements. That gives your design team a clearer programme.
BAT SURVEY COST
Know what your quotation covers.
The right fee reflects the building, the survey stage and the work needed. We scope these together so you can budget for your planning application with greater clarity.
from £275 + VAT
£330 including VAT
Starting fee for a PRA. Larger buildings and more complex projects cost more. We confirm the site-specific scope, deliverables and fee in writing.
Request my PRA quote →What changes the cost?
- Scale & accessNumber of buildings, size, roof complexity and safe inspection arrangements.
- Further fieldworkEmergence survey visits, staffing, recording and analysis where required.
- Reporting & next stagesProject complexity, design changes, mitigation or licensing support.
The PRA starting price is not a package price for emergence surveys or a mitigation licence. Additional work is scoped separately; the quotation will identify what is included.
EVIDENCE YOUR DESIGN TEAM CAN USE
More than a survey.
A practical way forward.
From loft conversions and barn conversions to roof repairs, extensions and demolition, the report should connect ecological findings to the proposed works.
What was assessed
Survey methods, site context, relevant features, evidence and any limitations, supported by appropriate photographs or plans.
What it means for the project
How the proposals relate to bat roosts and habitat, what further evidence is needed and what should inform the design.
What happens next
Recommendations for further work, avoidance or mitigation, with licensing considerations identified where relevant.
Planning permission and protected-species licensing are separate matters. Where bats or roosts may be affected, the project needs the appropriate ecological advice and authorisation before relevant works proceed.
LOCAL PROJECT. SITE-SPECIFIC ADVICE.
Where is your development?
Select your region, then your county or local area. We will scope the survey around your site, proposed works and planning requirements.
Greater London
Projects across London’s boroughs and the City of London, including extensions, roof works, conversions and redevelopment.
Provide the site postcode and the council’s request. We will check the project-specific requirements and confirm availability and any travel allowance in your quotation.
Tell us your site postcode →Coverage profiles identify locations, not separate council policies. The relevant planning authority and its current requirements are checked for your project.
YOUR BAT SURVEY QUESTIONS
Clear answers before you book.
Unsure which survey the council needs? Tell us what you are proposing and share any existing advice. We can help identify the appropriate next step.
Is a PRA the same as a bat emergence survey?
No. A preliminary roost assessment is a daytime inspection of potential roost features and evidence. An emergence survey observes use of a building around dusk. The PRA findings help establish whether further surveys are appropriate.
Will I need a bat survey for a loft conversion or extension?
It depends on the building, proposed works and potential effects. Roof alterations, demolition and conversions can affect suitable features. Share your drawings and any council comments so the need and scope can be assessed.
What if I have never seen bats at the property?
Bats can use small concealed features and may only be visible briefly. A lack of sightings by an owner does not establish that a building is unused. A professional assessment considers the features and evidence systematically.
Can I arrange a survey in winter?
A daytime PRA is generally possible year-round, subject to access and conditions. Summer emergence surveys cannot simply be replaced with a winter visit. Where further fieldwork is needed, we will explain the relevant seasonal programme.
Does finding bats stop the development?
It does not automatically mean a project cannot proceed. The response depends on the species, roost, effects and available design options. Avoidance, mitigation and licensing may need to be considered before works.
How much does a bat survey cost?
ACP’s PRA starting price is £275 + VAT (£330 including VAT). The final price depends on your site and agreed scope. Emergence surveys, complex assessments and licensing work require separate quotations.
Can you use our existing bat report?
Send it with your current drawings and any planning comments. We will review its scope, age, recommendations and relevance to the current proposal before advising whether updates or additional surveys are needed.
How quickly will I receive the report?
We confirm the proposed inspection and reporting programme when quoting. Where seasonal fieldwork is needed, the final report depends on completion of the required visits and analysis.
LET’S SCOPE YOUR PROJECT
The right survey starts with a short conversation.
Tell us about your building and the works you are planning.
- Send the essentialsYour postcode, project type and any council request.
- We clarify the scopeA consultant can request drawings, photographs or previous reports.
- Receive a project-specific quoteUnderstand the proposed work, deliverables, fee and programme.
Have plans or planning comments?
Submit the enquiry first. We can then request the documents needed to scope your project, keeping your brief and supporting information together.
Tell us what you need.
Loading the enquiry form. You can also call 0330 236 7329 or email hello@acp-consultants.com.
Technical references
Technical references: Natural England: bats and planning; Historic England: bat surveys; Bat Conservation Trust: professional survey guidelines. Checked 22 October 2026. Survey scope requires professional judgement.