Preliminary Roost Assessment (PRA) in Hampshire
Unsure whether bats could delay your planning application in Hampshire?
Our expert-led PRAs provide early clarity on constraints and protect your programme from avoidable setbacks.
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Do you Need a Preliminary Roost Assessment (PRA) in Hampshire?
If you’re a homeowner, a PRA is typically required where loft conversions, roof replacements, barn conversions or structural alterations affect buildings with any potential bat roost features. Hampshire councils will usually seek confirmation that bats are not using the structure before works proceed.
For developers, PRAs are required where existing buildings, trees or structures form part of a planning submission and planners need early, defensible evidence of bat risk before determining whether further surveys are necessary. This commonly affects housing schemes, conversions, infrastructure upgrades and regeneration sites.
Early confirmation at PRA stage prevents seasonal bottlenecks, redesign and unexpected licensing risk.
Across Hampshire, Preliminary Roost Assessments are most frequently requested where development interacts with:
Historic and period properties in towns like Winchester, Basingstoke, and Southampton, where older buildings, roof voids, and brickwork gaps present bat roosting opportunities
Agricultural buildings and barns in rural areas such as the New Forest, East Hampshire, and the Test Valley, where traditional barns and farm structures provide potential bat habitats
Brownfield and regeneration sites in urban areas like Portsmouth, Andover, and Havant, where older industrial and commercial buildings remain within redevelopment plans
River corridors, wetlands, and coastal areas including the River Itchen, Solent coastline, and areas of heathland and woodland, which intersect with both rural and urban development zones
PRA requirements are routinely tested at validation wherever bat roost potential exists.
Our Bat Dusk Emergence Survey services cover the whole of Hampshire, from urban centres to rural landscapes.
Why Hampshire Planning Authorities Request Preliminary Roost Assessments
Hampshire planning authorities require PRAs wherever buildings, trees or structures present any credible roost potential to ensure compliance with the Wildlife & Countryside Act 1981, the Conservation of Habitats and Species Regulations 2017, and national planning policy. Without a PRA, planners cannot lawfully determine whether emergence surveys or licensing will be required. Where early evidence is missing, applications commonly face validation blocks, additional ecological conditions or forced seasonal delay.
If a Hampshire project involves demolition, conversion or structural alteration, PRA evidence should be confirmed before the application reaches validation.
Local Case Insight
The Preliminary Roost Assessment Process
Our Preliminary Roost Assessments in Hampshire provide fully compliant reports accepted by local planning authorities. It prevents avoidable emergence delays, stabilises planning submissions and ensures that any further survey requirements are proportionate and justified.
Key Deliverables for Hampshire Projects
Where bat scoping is required to unlock planning in Hampshire, a PRA provides:
a legally defensible preliminary roost assessment report
confirmed classification of roost potential
identification of whether emergence surveys are required
early determination of licensing likelihood
documentation structured for Staffordshire LPA review
The outcome is certainty, not escalation.
Step 1
Programme & Scoping
Proposed works, construction sequence and planning feedback are reviewed to define PRA scope.
Step 2
Daytime Roost Inspection
Inspection of buildings, structures or trees for roost features and bat evidence in line with lawful survey guidance.
Step 3
Assessment
Roost potential classification and planning implications interpreted against LPA validation requirements.
Step 4
Reporting & Integration
Evidence is reported for planning submissions and coordinated with Bat Emergence Surveys or PEAs where required.
Next Steps
Need to confirm whether a Hampshire property or development requires a Preliminary Roost Assessment?
Submit the site details and confirmation is provided before your application reaches validation.
FAQ - Preliminary Roost Assessments in Hampshire
What is a Preliminary Roost Assessment in Hampshire?
A Preliminary Roost Assessment is a daytime bat survey undertaken by a qualified ecologist to determine whether a building has potential to support roosting bats. It is commonly required to support planning applications involving roof works, demolition or structural alteration.
Are properties near the New Forest more likely to require a PRA?
Often yes. Properties within or close to the New Forest and surrounding countryside are typically subject to higher ecological scrutiny. Roof alterations and barn conversions in these areas commonly trigger bat survey requirements.
Planning guidance for New Forest District Council can be accessed at:
https://www.newforest.gov.uk/planning
Do thatched or traditional roofs require bat assessment?
Yes. Thatched and older pitched roofs often contain access gaps and voids suitable for bats. Alterations or replacement works usually require a Preliminary Roost Assessment before approval.
Is a PRA required for demolition of garages or annexes?
It can be. Detached garages, annexes and small outbuildings may contain roof voids suitable for bats and frequently require assessment before removal.
Do coastal properties in Hampshire need bat surveys?
They can. Coastal and estuarine settlements often support bat foraging routes, and buildings with roof voids may require assessment where structural works are proposed.
Does a PRA include inspection of internal loft spaces?
Yes. The ecologist inspects accessible lofts and roof voids internally, alongside a detailed external inspection of tiles, ridges and structural junctions.
Can a Preliminary Roost Assessment be carried out at any time of year?
Yes. A PRA is a daytime inspection and can be undertaken year round. If moderate or high roost potential is identified, further surveys may be seasonally restricted.
What happens if bat evidence is discovered?
If droppings, staining or roost features are identified, dusk emergence or dawn re entry surveys may be recommended before planning permission can be finalised.
Will carrying out a PRA delay my Hampshire planning application?
Undertaking the survey early reduces delay risk. Submitting a compliant report with the initial application avoids ecological conditions being imposed later.
How can ProHort support Preliminary Roost Assessments in Hampshire?
ProHort provides professional Preliminary Roost Assessments across Hampshire for homeowners and developers. Our reports are proportionate, clearly structured and aligned with local planning validation requirements to support efficient project delivery.
